Second commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

85 files changed, 10113 insertions, 333 deletions

diff --git a/Makefile b/Makefile
index ab1b4e4..f061ffa 100644
--- a/Makefile
+++ b/Makefile
@@ -10,24 +10,28 @@ include mk/after-config.mk
 
 OBJ =\
 	anysum.o\
-	patheq.o\
-	openfile.o\
-	hex.o\
-	writeall.o\
-	barrierwait.o\
-	barriersend.o\
-	format_result.o\
-	feedbuffer.o\
-	createbarriergroup.o\
-	killbarriergroup.o\
-	inithashers.o\
-	destroyhashers.o\
-	shiftbuffer.o\
-	calculate.o
+	get.o\
+	check.o\
+	barrier.o\
+	hash.o\
+	write.o\
+	open.o\
+	read.o\
+	proc.o\
+	command.o\
+	opts.o\
+	cmdline_bsum.o\
+	cmdline_sha3sum.o\
+	cmdline_other.o\
+	cmdline.o
 
 HDR =\
 	common.h
 
+MAN1 =\
+	anysum.1\
+	$(ALIASES:=.1)
+
 all: anysum
 $(OBJ): $(HDR)
 
@@ -41,11 +45,16 @@ install: anysum
 	mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"
 	mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1/"
 	cp -- anysum "$(DESTDIR)$(PREFIX)/bin/"
-	cp -- anysum.1 "$(DESTDIR)$(MANPREFIX)/man1/"
+	cp -- $(MAN1) "$(DESTDIR)$(MANPREFIX)/man1/"
+	set -e; for a in $(ALIASES); do\
+		test ! -d "$(DESTDIR)$(PREFIX)/bin/$$a";\
+		ln -sf -- anysum "$(DESTDIR)$(PREFIX)/bin/$$a";\
+	done
 
 uninstall:
 	-rm -f -- "$(DESTDIR)$(PREFIX)/bin/anysum"
-	-rm -f -- "$(DESTDIR)$(MANPREFIX)/man1/anysum.1"
+	-cd -- "$(DESTDIR)$(MANPREFIX)/man1/" && rm -f -- $(MAN1)
+	-cd -- "$(DESTDIR)$(PREFIX)/bin/" && rm -f -- $(ALIASES)
 
 clean:
 	-rm -f -- *.o *.a *.lo *.su *.so *.so.* *.gch *.gcov *.gcno *.gcda
diff --git a/README b/README
new file mode 100644
index 0000000..cfef42b
--- /dev/null
+++ b/README
@@ -0,0 +1,288 @@
+NAME
+	anysum - compute or verify against multiple checksums
+
+SYNOPSIS
+	anysum (-c [-w] | [-a algoritms] ...) [-W options] ...
+	       [-z] [file] ...
+
+DESCRIPTION
+	The anysum utility can calculate checksums of a file using
+	multiple hash functions, or using different parameters for
+	the function, in parallel (the utility can calculate checksums
+	for multiple files, but these are not calculated in parallel).
+
+	The anysum utility can also check a file against multiple
+	checksums using multiple hash function and hash function
+	parameters in parallel, and check that the file matches at
+	least one of the listed checksums.
+
+OPTIONS
+	The anysum utility conforms to the Base Definitions volume of
+	POSIX.1-2017, Section 12.2, Utility Syntax Guidelines.
+
+	The following options are supported:
+
+	-a algorithms
+		Comma-separated list of hash functions and
+		parameters to compute checksums with.
+
+		Currently supported values are:
+
+		md2
+			For MD2.
+
+		md4
+			For MD4.
+
+		md5
+			For MD5.
+
+		ripemd128 or rmd128
+			For RIPEMD-128.
+
+		ripemd160 or rmd160
+			For RIPEMD-160.
+
+		ripemd256 or rmd256
+			For RIPEMD-256.
+
+		ripemd320 or rmd320
+			For RIPEMD-320.
+
+		sha0
+			For SHA-0.
+
+		sha1
+			For SHA-1.
+
+		sha224
+			For the 224 bit version of SHA-2.
+
+		sha256
+			For the 256 bit version of SHA-2.
+
+		sha384
+			For the 384 bit version of SHA-2.
+
+		sha512
+			For the 512 bit version of SHA-2.
+
+		sha512/224
+			For the 224 bit output variant of the
+			512 (and 384) bit version of SHA-2.
+
+		sha512/256
+			For the 256 bit output variant of the
+			512 (and 384) bit version of SHA-2.
+
+		keccak[r=BITRATE,c=CAPACITY,n=LENGTH,z=SQUEEZES]
+			For Keccak. The brackets and there parameter
+			list, and each parameter, are optional. Any
+			parameter the is skipped is automatically
+			determined. BITRATE and CAPACITY are the
+			Keccak function's bitrate and capacity bit
+			bits, and LENGTH is the hash length is bits.
+			SQUEEZES is the number of squeezes to perform
+			after a input has been feed into the function;
+			the default is one, and any number in excess
+			of this is the number of squeezes to perform
+			before squeezing out the hash.
+
+		keccak-224
+			For Keccak[r=1152,c=448,n=224].
+
+		keccak-256
+			For Keccak[r=1088,c=512,n=256].
+
+		keccak-384
+			For Keccak[r=832,c=768,n=384].
+
+		keccak-512
+			For Keccak[r=576,c=1024,n=512].
+
+		sha3-224
+			For the 224 bit version of SHA-3.
+
+		sha3-256
+			For the 256 bit version of SHA-3.
+
+		sha3-384
+			For the 384 bit version of SHA-3.
+
+		sha3-512
+			For the 512 bit version of SHA-3.
+
+		shake-128[n=LENGTH]
+			For the 128 bit version of SHAKE. The brackets
+			and n=LENGTH are optional; LENGTH shall the
+			output size in bits (default is 128).
+
+		shake-256[n=LENGTH]
+			For the 256 bit version of SHAKE. The brackets
+			and n=LENGTH are optional; LENGTH shall the
+			output size in bits (default is 256).
+
+		shake-512[n=LENGTH]
+			For the 512 bit version of SHAKE. The brackets
+			and n=LENGTH are optional; LENGTH shall the
+			output size in bits (default is 512).
+
+		rawshake-128[n=LENGTH]
+			For the 128 bit version of RawSHAKE. The
+			brackets and n=LENGTH are optional; LENGTH
+			shall the output size in bits (default is 128).
+
+		rawshake-256[n=LENGTH]
+			For the 256 bit version of RawSHAKE. The
+			brackets and n=LENGTH are optional; LENGTH
+			shall the output size in bits (default is 256).
+
+		rawshake-512[n=LENGTH]
+			For the 512 bit version of RawSHAKE. The
+			brackets and n=LENGTH are optional; LENGTH
+			shall the output size in bits (default is 512).
+
+		blake224[salt=SALT] or b224[salt=SALT]
+			For the 224 bit version of BLAKE. The brackets
+			and salt=SALT are optional; SALT shall be a 32
+			character long hexadecimal value.
+
+		blake256[salt=SALT] or b256[salt=SALT]
+			For the 256 bit version of BLAKE. The brackets
+			and salt=SALT are optional; SALT shall be a 32
+			character long hexadecimal value.
+
+		blake384[salt=SALT] or b384[salt=SALT]
+			For the 384 bit version of BLAKE. The brackets
+			and salt=SALT are optional; SALT shall be a 64
+			character long hexadecimal value.
+
+		blake512[salt=SALT] or b512[salt=SALT]
+			For the 512 bit version of BLAKE. The brackets
+			and salt=SALT are optional; SALT shall be a 64
+			character long hexadecimal value.
+
+		The utility does also recognise similar values
+		that are obviously equivalent.
+
+	-b
+		Read in binary mode when computing hashes.
+
+	-c
+		Verify the the files listed in file against the
+		checksums listed on the same lines. The file
+		shall be formatted as the output of the utility
+		when this option is not used. See the STDOUT
+		section for more information. If a file is listed
+		multiple times, it need only match one of the
+		checksums listed for the file.
+
+		The length of the listed checksums need not match
+		the length output by this utility; before the
+		checksums are compared, they are truncated to the
+		shorter of the two checksums.
+
+	-t
+		Read in text mode when computing hashes.
+
+	-W options
+		Comma-sepearated list of implementation-specific
+		options. The following options are supported:
+
+		output=format
+			format shall be "lowercase" if the checksums
+			shall be printed in lowercase hexadecimal
+			format (default), "uppercase" for uppercase
+			hexadecimal format, or "binary" for binary
+			format without anything but the checksum
+			printed to standard output. This option is
+			ignored if the -c option is used.
+
+		input=format
+			format shall be "binary" if the files are
+			be read in binary mode, "text" if the files
+			shall be read in text mode, or "hexadecimal"
+			they shall be decoded from hexadecimal to
+			binary. If the -c option is used, the mode
+			specification associated with a file is
+			overrides this behaviour for that file if
+			the line specifies hexadecimal mode.
+
+		threads=count
+			The maximum number of threads that the
+			utility may use. If "auto" is specified,
+			the utility selects a default value, which
+			currently is the number of online CPU threads
+			(at any time; assumed to be 8 if it cannot
+			be determined) minus 2, or 1 if this would
+			be less than 1.
+
+		recursive
+			If a file operand is a directory, the checksum
+			is computed for all files recursively.
+			This option is ignored if the -c option is
+			used.
+
+		no-recursive
+			The utility shall traverse directories.
+			(This is the default behaviour).
+
+	-w
+		Warn about, but skip, lines that are not properly
+		formatted.
+
+	-z
+		Use NUL byte as line ending instead of LF.
+
+	There is no difference between binary mode and text mode,
+	so the -b and -t options are ignored.
+
+OPERANDS
+	The following operand is supported:
+
+	file
+		The file to read and compute the checksum for, or if
+		the -c option is used, use as the listing of files
+		and checksums to verify the files against. If dash
+		('-') is used or if no file operand is specified,
+		standard input will be used.
+
+STDOUT
+	If the -c option is not used, the utility shall print the
+	following line for each calculated checksum, however there
+	are options that modify the format; see the OPTIONS section
+	for more information:
+
+		"%s:%s %c%s\n", <hash function>, <hash>, <mode>,
+		<file>
+
+	where <mode> is SP (' ') for text mode, an asterisk ('*')
+	for binary mode, or a pound sign ('#') for hexadecimal
+	mode; however if there is no difference between binary
+	mode and text mode and either is selected, SP (' ')
+	(text mode) is used.
+
+	If the -c option the output shall be on the format:
+
+		"%s: %s\n", <file>, <validity>
+
+	where <validity> is an implementation specified string
+	that describes whether the checksum was valid (possibly
+	with remarks), the file did not exist, the file could
+	not be read (possibly with error information), or if
+	the checksum was invalid or could not be compared
+	(possibly with remarks). The -z option does not modify
+	the line ending.
+
+EXIT STATUS
+	The following exit values are returned:
+
+	0	Successful completion.
+
+	1	Checksums did not match or a file did not exist.
+
+	2	An error occurred.
+
+NOTES
+	Other implementations do not necessarily recognise the
+	'#' mode specifier in checksum list files.
diff --git a/anysum.1 b/anysum.1
new file mode 100644
index 0000000..b2038cc
--- /dev/null
+++ b/anysum.1
@@ -0,0 +1,428 @@
+.TH ANYSUM 1 anysum
+.SH NAME
+anysum - compute or verify against multiple checksums
+
+.SH SYNOPSIS
+.B anysum
+.RB ( -c
+.RB [ -w ]
+|
+.RB [ -a
+.IR algoritms ]\ ...)
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B anysum
+utility can calculate checksums of a file using
+multiple hash functions, or using different parameters for
+the function, in parallel (the utility can calculate checksums
+for multiple files, but these are not calculated in parallel).
+.PP
+The
+.B anysum
+utility can also check a file against multiple
+checksums using multiple hash function and hash function
+parameters in parallel, and check that the file matches at
+least one of the listed checksums.
+
+.SH OPTIONS
+The anysum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.BR -a \ \fIalgorithms\fP
+Comma-separated list of hash functions and
+parameters to compute checksums with.
+
+Currently supported values are:
+.RS
+.TP
+.B md2
+For MD2.
+.TP
+.B md4
+For MD4.
+.TP
+.B md5
+For MD5.
+.TP
+.BR ripemd128 " or " rmd128
+For RIPEMD-128.
+.TP
+.BR ripemd160 " or " rmd160
+For RIPEMD-160.
+.TP
+.BR ripemd256 " or " rmd256
+For RIPEMD-256.
+.TP
+.BR ripemd320 " or " rmd320
+For RIPEMD-320.
+.TP
+.B sha0
+For SHA-0.
+.TP
+.B sha1
+For SHA-1.
+.TP
+.B sha224
+For the 224 bit version of SHA-2.
+.TP
+.B sha256
+For the 256 bit version of SHA-2.
+.TP
+.B sha384
+For the 384 bit version of SHA-2.
+.TP
+.B sha512
+For the 512 bit version of SHA-2.
+.TP
+.B sha512/224
+For the 224 bit output variant of the
+512 (and 384) bit version of SHA-2.
+.TP
+.B sha512/256
+For the 256 bit output variant of the
+512 (and 384) bit version of SHA-2.
+.TP
+.BI keccak[r= bitrate ,c= capacity ,n= length ,z= squeezes ]
+For Keccak. The brackets and there parameter
+list, and each parameter, are optional. Any
+parameter the is skipped is automatically
+determined.
+.I bitrate
+and
+.I capacity
+are the Keccak function's bitrate and
+capacity bit bits, and
+.I length
+is the hash length is bits.
+.I squeezes
+is the number of squeezes to perform
+after a input has been feed into the function;
+the default is one, and any number in excess
+of this is the number of squeezes to perform
+before squeezing out the hash.
+.TP
+.B keccak-224
+For Keccak[r=1152,c=448,n=224].
+.TP
+.B keccak-256
+For Keccak[r=1088,c=512,n=256].
+.TP
+.B keccak-384
+For Keccak[r=832,c=768,n=384].
+.TP
+.B keccak-512
+For Keccak[r=576,c=1024,n=512].
+.TP
+.B sha3-224
+For the 224 bit version of SHA-3.
+.TP
+.B sha3-256
+For the 256 bit version of SHA-3.
+.TP
+.B sha3-384
+For the 384 bit version of SHA-3.
+.TP
+.B sha3-512
+For the 512 bit version of SHA-3.
+.TP
+.BI shake-128[n= length ]
+For the 128 bit version of SHAKE. The brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 128).
+.TP
+.BI shake-256[n= length ]
+For the 256 bit version of SHAKE. The brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 256).
+.TP
+.BI shake-512[n= length ]
+For the 512 bit version of SHAKE. The brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 512).
+.TP
+.BI rawshake-128[n= length ]
+For the 128 bit version of RawSHAKE. The
+brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 128).
+.TP
+.BI rawshake-256[n= length ]
+For the 256 bit version of RawSHAKE. The
+brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 256).
+.TP
+.BI rawshake-512[n= length ]
+For the 512 bit version of RawSHAKE. The
+brackets and
+.BI n= length
+are optional;
+.I length
+shall the output size in bits (default is 512).
+.TP
+.BR blake224[salt= \fIsalt\fP ] " or " b224[salt= \fIsalt\fP ]
+For the 224 bit version of BLAKE. The brackets and
+.BI salt= salt
+are optional;
+.I salt
+shall be a 32 character long hexadecimal value.
+.TP
+.BR blake256[salt= \fIsalt\fP ] " or " b256[salt= \fIsalt\fP ]
+For the 256 bit version of BLAKE. The brackets and
+.BI salt= salt
+are optional;
+.I salt
+shall be a 32 character long hexadecimal value.
+.TP
+.BR blake384[salt= \fIsalt\fP ] " or " b384[salt= \fIsalt\fP ]
+For the 384 bit version of BLAKE. The brackets and
+.BI salt= salt
+are optional;
+.I salt
+shall be a 64 character long hexadecimal value.
+.TP
+.BR blake512[salt= \fIsalt\fP ] " or " b512[salt= \fIsalt\fP ]
+For the 512 bit version of BLAKE. The brackets and
+.BI salt= salt
+are optional;
+.I salt
+shall be a 64 character long hexadecimal value.
+.PP
+The utility does also recognise similar values
+that are obviously equivalent.
+.RE
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.BI threads= count
+The maximum number of threads that the
+utility may use. If
+.RB \(dq auto \(dq
+is specified, the utility selects a default
+value, which currently is the number of
+online CPU threads (at any time; assumed to
+be 8 if it cannot be determined) minus 2,
+or 1 if this would be less than 1.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s:%s %c%s\en\(dq,
+.RI < "hash function" >\fB,\fP
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR md2sum (1),
+.BR md4sum (1),
+.BR md5sum (1),
+.BR rmd128sum (1),
+.BR rmd256sum (1),
+.BR rmd384sum (1),
+.BR rmd512sum (1),
+.BR sha0sum (1),
+.BR sha1sum (1),
+.BR sha224sum (1),
+.BR sha256sum (1),
+.BR sha384sum (1),
+.BR sha512sum (1),
+.BR sha512-224sum (1),
+.BR sha512-256sum (1),
+.BR sha3sum (1),
+.BR sha3-224sum (1),
+.BR sha3-256sum (1),
+.BR sha3-384sum (1),
+.BR sha3-512sum (1),
+.BR keccaksum (1),
+.BR keccak224sum (1),
+.BR keccak256sum (1),
+.BR keccak384sum (1),
+.BR keccak512sum (1),
+.BR shake128sum (1),
+.BR shake256sum (1),
+.BR shake512sum (1),
+.BR rawshake128sum (1),
+.BR rawshake256sum (1),
+.BR rawshake512sum (1),
+.BR bsum (1),
+.BR b224sum (1),
+.BR b256sum (1),
+.BR b384sum (1),
+.BR b512sum (1)
diff --git a/anysum.c b/anysum.c
index a478a7a..6853ca5 100644
--- a/anysum.c
+++ b/anysum.c
@@ -1,75 +1,117 @@
 /* See LICENSE file for copyright and license details. */
 #include "common.h"
-#include <libsimple-arg.h>
 
-NUSAGE(2, "[file] ...");
 
-
-static int
-calculate_and_print(const char *file, struct barrier_group *group, struct global_data *global)
-{
-	size_t i;
-	if (calculate(file, group, global))
-		return -1;
-	for (i = 0; i < global->nalgorithms; i++)
-		writeall(STDOUT_FILENO, global->algorithms[i].result, global->algorithms[i].result_length, "<stdout>");
-	return 0;
-}
-
-
-static int
-calculate_each_and_print(char **files, struct algorithm *algorithms, size_t nalgorithms, enum format format)
-{
-	size_t wanted_nalgorithms = nalgorithms;
-	struct buffer buffer = {0};
-	int r, ret = 0;
-	struct barrier_group group;
-	struct global_data global;
-
-	global.format = format;
-	global.buffer = &buffer;
-	global.algorithms = algorithms;
-	global.nalgorithms = nalgorithms;
-
-	createbarriergroup(&group, nalgorithms, &global);
-
-	if (!*files) {
-		global.file = "-";
-		ret = calculate_and_print("-", &group, &global) ? 2 : 0;
-	}
-	while (*files) {
-		global.file = *files;
-		r = calculate_and_print(*files++, &group, &global) ? 2 : 0;
-		ret = MAX(r, ret);
-	}
-
-	if (nalgorithms != wanted_nalgorithms)
-		ret = 2;
-
-	killbarriergroup(&group, &global);
-
-	free(buffer.buf);
-	return ret;
-}
+static const char *default_algostrs[] = {
+#if defined(SUPPORT_MD2) && 0 /* skipping: compromised is theory */
+	"MD2",
+#endif
+#if defined(SUPPORT_MD4) && 0 /* skipping: compromised */
+	"MD4",
+#endif
+#if defined(SUPPORT_MD5) && 0 /* skipping: compromised */
+	"MD5",
+#endif
+#if defined(SUPPORT_RIPEMD_128) && 1
+	"RIPEMD-128",
+#endif
+#if defined(SUPPORT_RIPEMD_160) && 1
+	"RIPEMD-160",
+#endif
+#if defined(SUPPORT_RIPEMD_256) && 1
+	"RIPEMD-256",
+#endif
+#if defined(SUPPORT_RIPEMD_320) && 1
+	"RIPEMD-320",
+#endif
+#if defined(SUPPORT_SHA0) && 0 /* skipping: compromised */
+	"SHA0",
+#endif
+#if defined(SUPPORT_SHA1) && 0 /* skipping: compromised */
+	"SHA1",
+#endif
+#if defined(SUPPORT_SHA2) && 1
+	"SHA-224",
+	"SHA-256",
+	"SHA-384",
+	"SHA-512",
+	"SHA-512/224",
+	"SHA-512/256",
+#endif
+#if defined(SUPPORT_SHA3) && 1
+	"SHA3-224",
+	"SHA3-256",
+	"SHA3-384",
+	"SHA3-512",
+#endif
+#if defined(SUPPORT_KECCAK) && 1
+	"Keccak-224",
+	"Keccak-256",
+	"Keccak-384",
+	"Keccak-512",
+#endif
+#if defined(SUPPORT_RAWSHAKE) && 1
+	"RawSHAKE128",
+	"RawSHAKE256",
+	"RawSHAKE512",
+#endif
+#if defined(SUPPORT_SHAKE) && 1
+	"SHAKE128",
+	"SHAKE256",
+	"SHAKE512",
+#endif
+#if defined(SUPPORT_BLAKE224) && 1
+	"BLAKE224",
+#endif
+#if defined(SUPPORT_BLAKE256) && 1
+	"BLAKE256",
+#endif
+#if defined(SUPPORT_BLAKE384) && 1
+	"BLAKE384",
+#endif
+#if defined(SUPPORT_BLAKE512) && 1
+	"BLAKE512",
+#endif
+	NULL
+};
 
 
 int
-main(int argc, char *argv[])
+main(int argc, char **argv)
 {
-	enum format format = LOWERCASE_HEX | WITH_ALGOSTR | WITH_FILENAME | WITH_LF;
-	struct algorithm algorithms[] = {{"sha1"}, {"sha2-512/224"}, {"sha1"}};
-	size_t i, nalgorithms = ELEMSOF(algorithms);
+	struct algorithm default_algorithms[ELEMSOF(default_algostrs)];
+	struct config config = {.format = LOWERCASE_HEX | WITH_FILENAME | WITH_LF};
+	char stdin_str[] = "-";
+	char *stdin_array[] = {stdin_str, NULL};
+	size_t i;
 	int ret;
 
 	libsimple_default_failure_exit = 2;
+	cmdline(&argc, &argv, &config);
+	if (!*argv)
+		argv = stdin_array;
 
-	ARGBEGIN {
-	default:
-		usage();
-	} ARGEND;
+	if (config.verify) {
+		ret = verify_checksums(argv, config.algorithms, config.nalgorithms, config.format,
+		                       config.threads, config.warn_improper_format, config.hexinput);
+	} else {
+		if (!config.nalgorithms) {
+			memset(default_algorithms, 0, sizeof(default_algorithms));
+			for (i = 0; default_algostrs[i]; i++) {
+				default_algorithms[i].algostr = default_algostrs[i];
+				default_algorithms[i].result = NULL;
+			}
+			config.nalgorithms = i;
+			if (!config.nalgorithms) {
+				eprintf("not compiled to support any default hash functions");
+			}
+		}
+		ret = calculate_and_print_each(argv, config.algorithms, config.nalgorithms, config.threads,
+		                               config.format, config.hexinput, config.recursive);
+	}
 
-	ret = calculate_each_and_print(argv, algorithms, nalgorithms, format);
-	for (i = 0; i < nalgorithms; i++)
-		free(algorithms[i].result);
+	for (i = 0; i < config.nalgorithms; i++)
+		free(config.algorithms[i].result);
+	free(config.algorithms);
 	return ret;
 }
diff --git a/b224sum.1 b/b224sum.1
new file mode 100644
index 0000000..7f3551f
--- /dev/null
+++ b/b224sum.1
@@ -0,0 +1,224 @@
+.TH B224SUM 1 anysum
+.SH NAME
+b224sum - compute or verify against multiple BLAKE-224 hashes
+
+.SH SYNOPSIS
+.B b224sum
+.RB [ -c
+.RB [ -w ]]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B b224sum
+utility calculates and prints or checks BLAKE-224
+checksums.
+.PP
+The
+.B b224sum
+utility can also check a file against multiple BLAKE-224
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The b224sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -B
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -L
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -S \ \fIsalt\fP
+16-byte salt, encoded as a 32 character long
+hexadecimal string.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.B -U
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/b256sum.1 b/b256sum.1
new file mode 100644
index 0000000..511542a
--- /dev/null
+++ b/b256sum.1
@@ -0,0 +1,224 @@
+.TH B256SUM 1 anysum
+.SH NAME
+b256sum - compute or verify against multiple BLAKE-256 hashes
+
+.SH SYNOPSIS
+.B b256sum
+.RB [ -c
+.RB [ -w ]]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B b256sum
+utility calculates and prints or checks BLAKE-256
+checksums.
+.PP
+The
+.B b256sum
+utility can also check a file against multiple BLAKE-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The b256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -B
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -L
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -S \ \fIsalt\fP
+16-byte salt, encoded as a 32 character long
+hexadecimal string.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.B -U
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/b384sum.1 b/b384sum.1
new file mode 100644
index 0000000..43aca61
--- /dev/null
+++ b/b384sum.1
@@ -0,0 +1,224 @@
+.TH B384SUM 1 anysum
+.SH NAME
+b384sum - compute or verify against multiple BLAKE-384 hashes
+
+.SH SYNOPSIS
+.B b384sum
+.RB [ -c
+.RB [ -w ]]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B b384sum
+utility calculates and prints or checks BLAKE-384
+checksums.
+.PP
+The
+.B b384sum
+utility can also check a file against multiple BLAKE-384
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The b384sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -B
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -L
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -S \ \fIsalt\fP
+32-byte salt, encoded as a 64 character long
+hexadecimal string.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.B -U
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/b512sum.1 b/b512sum.1
new file mode 100644
index 0000000..92d883d
--- /dev/null
+++ b/b512sum.1
@@ -0,0 +1,224 @@
+.TH B512SUM 1 anysum
+.SH NAME
+b512sum - compute or verify against multiple BLAKE-512 hashes
+
+.SH SYNOPSIS
+.B b512sum
+.RB [ -c
+.RB [ -w ]]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B b512sum
+utility calculates and prints or checks BLAKE-512
+checksums.
+.PP
+The
+.B b512sum
+utility can also check a file against multiple BLAKE-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The b512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -B
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -L
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -S \ \fIsalt\fP
+32-byte salt, encoded as a 64 character long
+hexadecimal string.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.B -U
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/createbarriergroup.c b/barrier.c
index 694032b..cd7bae8 100644
--- a/createbarriergroup.c
+++ b/barrier.c
@@ -2,6 +2,35 @@
 #include "common.h"
 
 
+void
+barrierwait(pthread_barrier_t *barrier)
+{
+#ifndef SINGLE_THREADED
+	int r = pthread_barrier_wait(barrier);
+	if (r && r != PTHREAD_BARRIER_SERIAL_THREAD) {
+		errno = r;
+		eprintf("pthread_barrier_wait:");
+	}
+#else
+	(void) barrier;
+#endif
+}
+
+
+void
+barriersend(struct barrier_group *group, struct global_data *global, void (*action)(struct algorithm *, struct global_data *))
+{
+	size_t index;
+	global->action = action;
+	if (group->nthreads)
+		barrierwait(&group->barrier);
+	for (index = 0; index < global->nalgorithms; index += group->nthreads + 1U)
+		(*action)(&global->algorithms[index], global);
+	if (group->nthreads)
+		barrierwait(&group->barrier);
+}
+
+
 #ifndef SINGLE_THREADED
 static void *
 slaveloop(void *thread_param)
@@ -31,8 +60,6 @@ createbarriergroup(struct barrier_group *group_out, size_t count, struct global_
 #ifndef SINGLE_THREADED
 	size_t i;
 
-	count = MAX(count, 64);
-
 	group_out->nthreads = count - 1U;
 	group_out->threads = NULL;
 	if (!group_out->nthreads)
@@ -57,3 +84,30 @@ createbarriergroup(struct barrier_group *group_out, size_t count, struct global_
 	(void) count;
 #endif
 }
+
+
+void
+killbarriergroup(struct barrier_group *group, struct global_data *global)
+{
+#ifndef SINGLE_THREADED
+	size_t i;
+
+	if (!group->nthreads)
+		return;
+
+	global->action = NULL;
+	for (i = 0; i < group->nthreads; i++)
+		group->threads[i].global = global;
+	barrierwait(&group->barrier);
+
+	for (i = 0; i < group->nthreads; i++)
+		if ((errno = pthread_join(group->threads[i].thread, NULL)))
+			weprintf("pthread_join:");
+	pthread_barrier_destroy(&group->barrier);
+
+	free(group->threads);
+#else
+	(void) group;
+	(void) global;
+#endif
+}
diff --git a/barriersend.c b/barriersend.c
deleted file mode 100644
index a947357..0000000
--- a/barriersend.c
+++ /dev/null
@@ -1,16 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-barriersend(struct barrier_group *group, struct global_data *global, void (*action)(struct algorithm *, struct global_data *))
-{
-	size_t index;
-	global->action = action;
-	if (group->nthreads)
-		barrierwait(&group->barrier);
-	for (index = 0; index < global->nalgorithms; index += group->nthreads + 1U)
-		(*action)(&global->algorithms[index], global);
-	if (group->nthreads)
-		barrierwait(&group->barrier);
-}
diff --git a/barrierwait.c b/barrierwait.c
deleted file mode 100644
index a310a27..0000000
--- a/barrierwait.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-barrierwait(pthread_barrier_t *barrier)
-{
-#ifndef SINGLE_THREADED
-	int r = pthread_barrier_wait(barrier);
-	if (r && r != PTHREAD_BARRIER_SERIAL_THREAD) {
-		errno = r;
-		eprintf("pthread_barrier_wait:");
-	}
-#else
-	(void) barrier;
-#endif
-}
diff --git a/bsum.1 b/bsum.1
new file mode 100644
index 0000000..e897946
--- /dev/null
+++ b/bsum.1
@@ -0,0 +1,240 @@
+.TH BSUM 1 anysum
+.SH NAME
+bsum - compute or verify against multiple BLAKE hashes
+
+.SH SYNOPSIS
+.B bsum
+.RB [ -c
+.RB [ -w ]]
+.BR [ -l
+.IR bits ]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B bsum
+utility calculates and prints or checks BLAKE
+checksums.
+.PP
+The
+.B bsum
+utility can also check a file against multiple BLAKE
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The bsum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -B
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -L
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -l \ \fIbits\fP
+Version select: 224, 256, 384, or 512 for
+BLAKE-224 (default), BLAKE-256, BLAKE-384, or
+BLAKE-512, respectively.
+.TP
+.BR -S \ \fIsalt\fP
+If
+.I bits
+(the
+.B -l
+option) is 224, 256 or unspecified:
+16-byte salt, encoded as a 32 character long
+hexadecimal string.
+
+Otherwise:
+32-byte salt, encoded as a 64 character long
+hexadecimal string.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.B -U
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/calculate.c b/calculate.c
deleted file mode 100644
index 69181dd..0000000
--- a/calculate.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-static void
-process(struct algorithm *algorithm, struct global_data *global)
-{
-	size_t r;
-	r = algorithm->hasher.process(&algorithm->hasher,
-	                              &global->buffer->buf[algorithm->offset],
-	                              global->buffer->length - algorithm->offset);
-	algorithm->offset += r;
-}
-
-
-static void
-finalise(struct algorithm *algorithm, struct global_data *global)
-{
-	if (algorithm->hasher.finalise_const(&algorithm->hasher, &global->buffer->buf[algorithm->offset],
-	                                     global->buffer->length - algorithm->offset, 0))
-		abort();
-	format_result(algorithm, global->file, global->format);
-}
-
-
-int
-calculate(const char *file, struct barrier_group *group, struct global_data *global)
-{
-	int fd, is_new_fd, r, ret = -1;
-	const char *fname;
-
-	global->nalgorithms = inithashers(global->algorithms, global->nalgorithms);
-	if (!global->nalgorithms)
-		return 0;
-
-	fd = openfile(file, &is_new_fd, &fname);
-	if (fd < 0)
-		return -1;
-
-	global->buffer->length = 0;
-	while (!(r = feedbuffer(fd, global->buffer, fname))) {
-		barriersend(group, global, &process);
-		shiftbuffer(global->algorithms, global->nalgorithms, global->buffer);
-	}
-	if (r < 0)
-		goto fail;
-
-	barriersend(group, global, &finalise);
-	ret = 0;
-fail:
-	destroyhashers(global->algorithms, global->nalgorithms);
-	if (is_new_fd)
-		close(fd);
-	return ret;
-}
diff --git a/check.c b/check.c
new file mode 100644
index 0000000..d014d65
--- /dev/null
+++ b/check.c
@@ -0,0 +1,282 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+union str_or_off {
+	const char *s;
+	size_t off;
+};
+
+struct listing {
+	union str_or_off algorithm;
+	union str_or_off filename; /* first char determines mode */
+	union str_or_off checksum;
+};
+
+
+static int
+listingcmp(const void *av, const void *bv)
+{
+	const struct listing *a = av, *b = bv;
+	int r = strcmp(a->filename.s, b->filename.s);
+	if (r)
+		return r;
+	return strcmp(a->algorithm.s, b->algorithm.s);
+}
+
+
+static int
+parse_listing(struct listing **listingp, size_t *listing_lenp, size_t *listing_sizep,
+              struct buffer *buffer, const char *fname, int warn_improper_format, enum format format)
+{
+	size_t lineno = 1U;
+	char end = (format & WITH_NUL) ? '\0' : '\n';
+
+	for (; buffer->procoff < buffer->offset; lineno++) {
+		for (; buffer->procoff < buffer->offset; buffer->procoff++)
+			if (buffer->buf[buffer->procoff] == end)
+				break;
+		if (buffer->procoff == buffer->offset) {
+			weprintf("last line in \"%s\" is not terminated", fname);
+			if (!warn_improper_format)
+				return -1;
+			if (buffer->offset == buffer->size)
+				buffer->buf = erealloc(buffer->buf, buffer->size += 1U);
+		}
+		buffer->buf[buffer->procoff++] = '\0';
+
+		if (*listing_lenp == *listing_sizep)
+			*listingp = ereallocarray(*listingp, *listing_sizep += 512U, sizeof(**listingp));
+
+		(*listingp)[*listing_lenp].algorithm.off = buffer->ready;
+		if (format & WITH_ALGOSTR) {
+			for (; buffer->buf[buffer->ready] != ':'; buffer->ready++)
+				if (isspace(buffer->buf[buffer->ready]) || !buffer->buf[buffer->ready])
+					goto badline;
+			buffer->buf[buffer->ready++] = '\0';
+		}
+
+		(*listingp)[*listing_lenp].checksum.off = buffer->ready;
+		for (; isxdigit(buffer->buf[buffer->ready]); buffer->ready++)
+			buffer->buf[buffer->ready] = (char)tolower(buffer->buf[buffer->ready]);
+		if (buffer->buf[buffer->ready] != ' ')
+			goto badline;
+		buffer->buf[buffer->ready++] = '\0';
+
+		if (buffer->buf[buffer->ready] != ' ' &&
+		    buffer->buf[buffer->ready] != '*')
+			goto badline;
+		if (buffer->buf[buffer->ready] == '*')
+			buffer->buf[buffer->ready] = ' '; /* binary is insignificant */
+		(*listingp)[*listing_lenp].filename.off = buffer->ready;
+
+		if (!buffer->buf[(*listingp)[*listing_lenp].algorithm.off] ||
+		    !buffer->buf[(*listingp)[*listing_lenp].checksum.off] ||
+		    !buffer->buf[(*listingp)[*listing_lenp].filename.off + 1U])
+			goto badline;
+
+		*listing_lenp += 1U;
+nextline:
+		buffer->ready = buffer->procoff;
+	}
+
+	return 0;
+
+badline:
+	weprintf("line %zu in \"%s\" is improperly formatted", lineno, fname);
+	if (warn_improper_format)
+		goto nextline;
+	return -1;
+}
+
+
+static int
+get_listing(char **files, struct listing **listingp, size_t *listing_lenp, size_t *listing_sizep,
+            struct buffer *buffer, struct algorithm *algorithms, size_t nalgorithms,
+            enum format format, int warn_improper_format)
+{
+	const char *fname;
+	int r, fd, is_new_fd;
+	size_t i;
+
+	format &= (enum format)~FORMAT_MASK;
+	format |= LOWERCASE_HEX;
+
+	buffer->procoff = 0;
+	for (; *files; files++) {
+		fd = openfile(*files, &is_new_fd, &fname);
+		if (fd < 0)
+			return -1;
+
+		while (!(r = feedbuffer(fd, buffer, fname)));
+		if (r < 0)
+			goto fail;
+
+		if (is_new_fd) {
+			close(fd);
+			is_new_fd = 0;
+		}
+
+		if (parse_listing(listingp, listing_lenp, listing_sizep, buffer,
+		                  fname, warn_improper_format, format))
+			goto fail;
+	}
+
+	for (i = 0; i < *listing_lenp; i++) {
+		(*listingp)[i].algorithm.s = &buffer->buf[(*listingp)[i].algorithm.off];
+		(*listingp)[i].filename.s = &buffer->buf[(*listingp)[i].filename.off];
+		(*listingp)[i].checksum.s = &buffer->buf[(*listingp)[i].checksum.off];
+	}
+	if (!(format & WITH_ALGOSTR)) {
+		if (nalgorithms != 1U)
+			abort();
+		for (i = 0; i < *listing_lenp; i++)
+			(*listingp)[i].algorithm.s = algorithms[0].algostr;
+	}
+
+	return 0;
+
+fail:
+	if (is_new_fd)
+		close(fd);
+	return -1;
+}
+
+
+static int
+compare(const char *hash, size_t hash_len, const struct listing *listing, size_t nlisting, int *truncated_out)
+{
+	int truncated, ok = 0;
+	size_t len;
+	*truncated_out = 0;
+	for (; nlisting--; listing++) {
+		len = strlen(listing->checksum.s);
+		truncated = len < hash_len;
+		len = MIN(hash_len, len);
+		if (!strncmp(hash, listing->checksum.s, len)) {
+			ok = 1;
+			if (!truncated)
+				return 1;
+		}
+	}
+	*truncated_out = 1;
+	return ok;
+}
+
+
+static int
+check_file(struct listing *listing, size_t nlisting, size_t nthreads, struct global_data *global,
+           struct barrier_group *group, size_t *group_size)
+{
+	size_t i, j, n, orig_count, nthreads_cur, nthreads_now;
+	int cmp, truncated;
+
+	memset(global->algorithms, 0, nlisting * sizeof(*global->algorithms));
+	global->algorithms[0].algostr = listing[0].algorithm.s;
+	global->algorithms[0].result = NULL;
+	global->nalgorithms = 1U;
+	for (i = 1U; i < nlisting; i++) {
+		if (!strcmp(listing[i].algorithm.s, listing[i - 1U].algorithm.s)) {
+			listing[i].algorithm.s = listing[i - 1U].algorithm.s;
+		} else {
+			global->algorithms[global->nalgorithms].algostr = listing[i].algorithm.s;
+			global->algorithms[global->nalgorithms].result = NULL;
+			global->nalgorithms++;
+		}
+	}
+
+	nthreads_now = nthreads ? nthreads : getautonthreads();
+	nthreads_cur = MAX(MIN(global->nalgorithms, nthreads_now), 1U);
+	if (nthreads_cur > *group_size) {
+		if (*group_size)
+			killbarriergroup(group, global);
+		createbarriergroup(group, nthreads_cur, global);
+	}
+
+	orig_count = global->nalgorithms;
+	if (calculate(global->file, group, global)) {
+		printf("%s: %s\n", global->file, errno == ENOENT ? "Missing" : "Error");
+		return errno == ENOENT ? 1 : 2;
+	}
+
+	for (i = 0, j = 0; i < global->nalgorithms; i++, j += n) {
+		n = 1U;
+		for (; n < j - nlisting; n++)
+			if (listing[j].algorithm.s != listing[j + n].algorithm.s)
+				break;
+		cmp = strcmp(global->algorithms[0].algostr, listing[j].algorithm.s);
+		if (cmp < 0)
+			abort();
+		else if (cmp > 0)
+			continue;
+		if (compare(global->algorithms[0].result, global->algorithms[0].result_length, &listing[j], n, &truncated)) {
+			printf("%s: OK%s\n", global->file, truncated ? " (calculated hash was shorted the listed checksum)" : "");
+			return 0;
+		}
+	}
+
+	if (global->nalgorithms == orig_count) {
+		printf("%s: Fail\n", global->file);
+		return 1;
+	} else if (global->nalgorithms) {
+		printf("%s: Fail (some hash functions were not supported)\n", global->file);
+		return 2;
+	} else {
+		printf("%s: Fail (no hash function was supported)\n", global->file);
+		return 2;
+	}
+}
+
+
+int
+verify_checksums(char **files, struct algorithm *algorithms, size_t nalgorithms, size_t nthreads,
+                 enum format format, int warn_improper_format, int hexinput)
+{
+	struct listing *listing = NULL;
+	size_t listing_len = 0;
+	size_t listing_size = 0;
+	struct buffer listbuffer = {0};
+	struct buffer filebuffer = {0};
+	size_t i, first, n;
+	int r, ret = 0;
+	struct global_data global;
+	size_t algorithms_size = 0;
+	struct barrier_group group;
+	size_t group_size = 0;
+
+	if (get_listing(files, &listing, &listing_len, &listing_size, &listbuffer,
+	                algorithms, nalgorithms, format, warn_improper_format))
+		goto fail;
+	qsort(listing, listing_len, sizeof(*listing), &listingcmp);
+
+	global.algorithms = NULL;
+	global.buffer = &filebuffer;
+	for (i = 0; i < listing_len;) {
+		first = i++;
+		while (i < listing_len && !strcmp(listing[i].filename.s, listing[first].filename.s))
+			i++;
+		n = i - first;
+		if (n > algorithms_size) {
+			algorithms_size = n;
+			global.algorithms = ereallocarray(global.algorithms, n, sizeof(*global.algorithms));
+		}
+		global.file = &listing[i].filename.s[1];
+		global.hexinput = (hexinput || listing[i].filename.s[0] == '#');
+		r = check_file(&listing[i], n, nthreads, &global, &group, &group_size);
+		if (r < 0)
+			goto fail;
+		ret = MAX(r, ret);
+	}
+
+out:
+	if (group_size)
+		killbarriergroup(&group, &global);
+	free(listing);
+	free(listbuffer.buf);
+	free(filebuffer.buf);
+	return ret;
+
+fail:
+	ret = 2;
+	goto out;
+}
diff --git a/cmdline.c b/cmdline.c
new file mode 100644
index 0000000..182a29d
--- /dev/null
+++ b/cmdline.c
@@ -0,0 +1,84 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+static enum command command = ANYSUM;
+static enum libhashsum_algorithm algorithm;
+
+
+#define USAGE_COMMON   "[-c [-w]] [-W options] ... [-z] [file] ..."
+#define USAGE_BSUM     "[-l bits] [-S salt] "USAGE_COMMON
+#define USAGE_SHA3SUM  "[-a bits] "USAGE_COMMON
+#define USAGE_KECCAK   "[-R rate] [-C capacity] [-N output-size] [-S state-size] [-W word-size] [-Z squeeze-count] "USAGE_COMMON
+#define USAGE_SHAKE    "[-N output-bits] "USAGE_COMMON
+#define USAGE_RAWSHAKE "[-N output-bits] "USAGE_COMMON
+#define USAGE_ANYSUM   "(-c [-w] | [-a algoritms] ... ) [-W options] ... [-z] [file] ..."
+
+#define static
+NUSAGE(libsimple_default_failure_exit,
+       (command == ANYSUM  ? USAGE_ANYSUM :
+	command == BSUM    ? USAGE_BSUM :
+	command == SHA3SUM ? USAGE_SHA3SUM :
+	(algorithm == LIBHASHSUM_BLAKE224 ||
+	 algorithm == LIBHASHSUM_BLAKE256 ||
+	 algorithm == LIBHASHSUM_BLAKE384 ||
+	 algorithm == LIBHASHSUM_BLAKE512) ? USAGE_BSUM :
+	(algorithm == LIBHASHSUM_SHAKE128 ||
+	 algorithm == LIBHASHSUM_SHAKE256 ||
+	 algorithm == LIBHASHSUM_SHAKE512) ? USAGE_SHAKE :
+	(algorithm == LIBHASHSUM_RAWSHAKE128 ||
+	 algorithm == LIBHASHSUM_RAWSHAKE256 ||
+	 algorithm == LIBHASHSUM_RAWSHAKE512) ? USAGE_RAWSHAKE :
+	algorithm == LIBHASHSUM_KECCAK ? USAGE_KECCAK : USAGE_COMMON));
+#undef static
+
+
+void
+cmdline(int *argcp, char ***argvp, struct config *config)
+{
+	int old_argc = *argcp;
+	int argc = *argcp;
+	char **argv = *argvp;
+	const char *algostr = NULL;
+	char *algostrbuf = NULL;
+
+	argv0 = argv[0];
+	command = getcommand(&algostr, &algorithm);
+	switch (getsupercommand(command, algorithm)) {
+	case BSUM:
+		argc = cmdline_bsum(argc, argv, command, config, &algostr, &algorithm, &algostrbuf);
+		break;
+	case SHA3SUM:
+		argc = cmdline_sha3sum(argc, argv, command, config, &algostr, &algorithm, &algostrbuf);
+		break;
+	case ANYSUM:
+	case SPECIALISED:
+	default:
+		argc = cmdline_other(argc, argv, command, config);
+		break;
+	}
+
+	if (config->warn_improper_format > config->verify)
+		usage();
+
+	if (command == ANYSUM) {
+		if (config->verify && config->nalgorithms)
+			usage();
+		config->format |= WITH_ALGOSTR;
+	}
+	if (!config->verify) {
+		if ((config->format & FORMAT_MASK) == BINARY)
+			config->format &= FORMAT_MASK;
+	}
+
+	if (algostr) {
+		config->algorithms = erealloc(config->algorithms, sizeof(*config->algorithms));
+		(config->algorithms)[0].algostr = algostr;
+		config->nalgorithms = 1U;
+	}
+
+	*argcp = argc;
+	*argvp = &argv[old_argc - argc];
+
+	free(algostrbuf);
+}
diff --git a/cmdline_bsum.c b/cmdline_bsum.c
new file mode 100644
index 0000000..d267314
--- /dev/null
+++ b/cmdline_bsum.c
@@ -0,0 +1,102 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+cmdline_bsum(int argc, char **argv, enum command command, struct config *config,
+             const char **algostr, enum libhashsum_algorithm *algorithm, char **algostrbuf)
+{
+	const char *salt = NULL;
+	char *arg;
+
+	*algostrbuf = NULL;
+
+	ARGBEGIN {
+	case 'b': /* binary input (compat) */
+	case 't': /* text input (compat) */
+		config->hexinput = 0;
+		break;
+
+	case 'c':
+		config->verify = 1;
+		break;
+
+	case 'w':
+		config->warn_improper_format = 1;
+		break;
+
+	case 'z':
+		config->format &= (enum format)~WITH_LF;
+		config->format |= WITH_NUL;
+		break;
+
+	case 'l':
+		if (command != BSUM)
+			usage();
+		arg = ARG();
+		if      (!strcmp(arg, "224")) *algostr = "blake224", *algorithm = LIBHASHSUM_BLAKE224;
+		else if (!strcmp(arg, "256")) *algostr = "blake256", *algorithm = LIBHASHSUM_BLAKE256;
+		else if (!strcmp(arg, "384")) *algostr = "blake384", *algorithm = LIBHASHSUM_BLAKE384;
+		else if (!strcmp(arg, "512")) *algostr = "blake512", *algorithm = LIBHASHSUM_BLAKE512;
+		else
+			eprintf("unsupport value on -l option, expected 224, 256, 384, or 512");
+		break;
+
+	case 'S':
+		if (salt)
+			usage();
+		arg = ARG();
+		if (!strncasecmp(arg, "0x", 2))
+			arg = &arg[2];
+		if (!*arg)
+			usage();
+		salt = arg;
+		while (isxdigit(*arg))
+			arg++;
+		if (!*arg)
+			eprintf("expected hexadecimal value for -S option");
+		break;
+
+	case 'x': /* (compat) */
+		config->hexinput = 1;
+		break;
+
+	case 'L': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= LOWERCASE_HEX;
+		break;
+
+	case 'U': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= UPPERCASE_HEX;
+		break;
+
+	case 'B': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= BINARY;
+		break;
+
+	case 'W':
+		arg = parseopts(config, ARG(), &parseopt_vendor);
+		if (*arg)
+			eprintf("unsupported -W options: %s", arg);
+		break;
+
+	default:
+		usage();
+	} ARGEND;
+
+	if (salt) {
+		size_t expected_salt_len = 64; /* BLAKEb */
+		if (*algorithm == LIBHASHSUM_BLAKE224 || *algorithm == LIBHASHSUM_BLAKE256)
+			expected_salt_len = 32; /* BLAKEs */
+		if (strlen(salt) != expected_salt_len)
+			eprintf("salt for BLAKE%s is expected to be %zu hexadecimal characters long",
+			        &(*algostr)[5], expected_salt_len);
+		*algostrbuf = malloc(strlen(*algostr) + strlen(salt) + sizeof("[salt=]"));
+		sprintf(*algostrbuf, "%s[salt=%s]", *algostr, salt);
+		*algostr = *algostrbuf;
+	}
+
+	return argc;
+}
diff --git a/cmdline_other.c b/cmdline_other.c
new file mode 100644
index 0000000..167bc84
--- /dev/null
+++ b/cmdline_other.c
@@ -0,0 +1,60 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+static int
+parseopt_algorithm(void *config_, char *opt, char *val)
+{
+	struct config *config = config_;
+	if (val)
+		return 0;
+	config->algorithms = ereallocarray(config->algorithms, config->nalgorithms + 1U, sizeof(*config->algorithms));
+	memset(&config->algorithms[config->nalgorithms], 0, sizeof(*config->algorithms));
+	config->algorithms[config->nalgorithms].algostr = opt;
+	config->algorithms[config->nalgorithms].result = NULL;
+	config->nalgorithms++;
+	return 1;
+}
+
+
+int
+cmdline_other(int argc, char **argv, enum command command, struct config *config)
+{
+	char *arg;
+
+	ARGBEGIN {
+	case 'b': /* binary input (compat) */
+	case 't': /* text input (compat) */
+		config->hexinput = 0;
+		break;
+
+	case 'c':
+		config->verify = 1;
+		break;
+
+	case 'w':
+		config->warn_improper_format = 1;
+		break;
+
+	case 'z':
+		config->format &= (enum format)~WITH_LF;
+		config->format |= WITH_NUL;
+		break;
+
+	case 'W':
+		arg = parseopts(config, ARG(), &parseopt_algorithm);
+		if (*arg)
+			eprintf("unsupported -W options: %s", arg);
+		break;
+
+	case 'a':
+		if (command != ANYSUM || *parseopts(config, ARG(), &parseopt_algorithm))
+			usage();
+		break;
+
+	default:
+		usage();
+	} ARGEND;
+
+	return argc;
+}
diff --git a/cmdline_sha3sum.c b/cmdline_sha3sum.c
new file mode 100644
index 0000000..8fc33fd
--- /dev/null
+++ b/cmdline_sha3sum.c
@@ -0,0 +1,321 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifdef SUPPORT_SHA3
+#include <libkeccak.h>
+#endif
+
+
+static void
+intopt(long int *valp, char flag, const char *arg)
+{
+	if (*valp)
+		usage();
+	if (!isdigit(*arg))
+		goto invalid;
+	for (; isdigit(*arg); arg++) {
+		if (*valp > (LONG_MAX - (*arg & 15)) / 10)
+			goto invalid;
+		*valp = *valp * 10 + (*arg & 15);
+	}
+	if (*arg || !*valp) {
+	invalid:
+		eprintf("invalid value for -%c option, expected integer within [1, %li]", flag, LONG_MAX);
+	}
+}
+
+
+static char *
+fmtalgostr(const char *f, long int r, long int c, long int n, long int z)
+{
+	char *ret, *p;
+	int len;
+	len = snprintf(NULL, 0, "%s[r=%li,c=%li,n=%li,z=%li]", f, r, c, n, z);
+	if (len <= 0)
+		abort();
+	ret = emalloc((size_t)len);
+	p = stpcpy(ret, f);
+	*p++ = '[';
+	if (r)
+		p += sprintf(p, "r=%li%s", r, (c | n | z) ? "," : "");
+	if (c)
+		p += sprintf(p, "c=%li%s", c, (n | z) ? "," : "");
+	if (n)
+		p += sprintf(p, "n=%li%s", n, z ? "," : "");
+	if (z)
+		p += sprintf(p, "z=%li", z);
+	*p++ = ']';
+	*p = '\0';
+	return ret;
+}
+
+
+int
+cmdline_sha3sum(int argc, char **argv, enum command command, struct config *config,
+                const char **algostr, enum libhashsum_algorithm *algorithm, char **algostrbuf)
+{
+	long int r = 0, c = 0, n = 0, s = 0, w = 0, z = 0, bits;
+	char *arg, *p;
+	int verbose = 0;
+#ifdef SUPPORT_SHA3
+	struct libkeccak_generalised_spec gspec;
+	struct libkeccak_spec spec;
+	const char *suffix;
+#endif
+
+	*algostrbuf = NULL;
+
+	ARGBEGIN {
+	case 'c':
+		config->verify = 1;
+		break;
+
+	case 'w':
+		config->warn_improper_format = 1;
+		break;
+
+	case 'z':
+		config->format &= (enum format)~WITH_LF;
+		config->format |= WITH_NUL;
+		break;
+
+	case 'a':
+		if (command != SHA3SUM)
+			usage();
+		arg = ARG();
+		if      (!strcmp(arg, "224")) *algostr = "sha3-224", *algorithm = LIBHASHSUM_SHA3_224;
+		else if (!strcmp(arg, "256")) *algostr = "sha3-256", *algorithm = LIBHASHSUM_SHA3_256;
+		else if (!strcmp(arg, "384")) *algostr = "sha3-384", *algorithm = LIBHASHSUM_SHA3_384;
+		else if (!strcmp(arg, "512")) *algostr = "sha3-512", *algorithm = LIBHASHSUM_SHA3_512;
+		else
+			eprintf("unsupport value on -a option, expected 224, 256, 384, or 512");
+		break;
+
+	case 'b': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= BINARY;
+		break;
+
+	case 'l': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= LOWERCASE_HEX;
+		break;
+
+	case 'u': /* (compat) */
+		config->format &= (enum format)~FORMAT_MASK;
+		config->format |= UPPERCASE_HEX;
+		break;
+
+	case 'x': /* (compat) */
+		config->hexinput = 1;
+		break;
+
+	case 'v': /* (compat) */
+		verbose = 1;
+		break;
+
+	case 'R':
+		intopt(&r, FLAG(), ARG());
+		break;
+
+	case 'C':
+		intopt(&c, FLAG(), ARG());
+		break;
+
+	case 'N':
+	case 'O': /* (compat) */
+		intopt(&n, FLAG(), ARG());
+		break;
+
+	case 'S':
+	case 'B': /* (compat) */
+		intopt(&s, FLAG(), ARG());
+		break;
+
+	case 'Z':
+		intopt(&z, FLAG(), ARG());
+		break;
+
+	case 'W':
+		p = arg = ARG();
+		while (isdigit(*p))
+			p++;
+		if (*arg && !*p) {
+			intopt(&w, FLAG(), arg);
+		} else {
+			arg = parseopts(config, arg, &parseopt_vendor);
+			if (*arg)
+				eprintf("unsupported -W options: %s", arg);
+		}
+		break;
+
+	default:
+		usage();
+	} ARGEND;
+
+#ifdef SUPPORT_SHA3
+	libkeccak_generalised_spec_initialise(&gspec);
+#endif
+
+	switch (*algorithm) {
+	case LIBHASHSUM_KECCAK:
+#ifdef SUPPORT_SHA3
+		suffix = "";
+#endif
+		break;
+	case LIBHASHSUM_KECCAK_224: bits = 224; goto spec_keccak;
+	case LIBHASHSUM_KECCAK_256: bits = 256; goto spec_keccak;
+	case LIBHASHSUM_KECCAK_384: bits = 384; goto spec_keccak;
+	case LIBHASHSUM_KECCAK_512: bits = 512; spec_keccak:
+		if (r | c | n | s | w | z)
+			usage();
+#ifdef SUPPORT_SHA3
+		libkeccak_spec_sha3((struct libkeccak_spec *)&gspec, bits);
+		suffix = "";
+#endif
+		break;
+	case LIBHASHSUM_SHA3_224: bits = 224; goto spec_sha3;
+	case LIBHASHSUM_SHA3_256: bits = 256; goto spec_sha3;
+	case LIBHASHSUM_SHA3_384: bits = 384; goto spec_sha3;
+	case LIBHASHSUM_SHA3_512: bits = 512; spec_sha3:
+		if (r | c | n | s | w | z)
+			usage();
+#ifdef SUPPORT_SHA3
+		libkeccak_spec_sha3((struct libkeccak_spec *)&gspec, bits);
+		suffix = LIBKECCAK_SHA3_SUFFIX;
+#endif
+		break;
+	case LIBHASHSUM_SHAKE128: bits = 128; goto spec_shake;
+	case LIBHASHSUM_SHAKE256: bits = 256; goto spec_shake;
+	case LIBHASHSUM_SHAKE512: bits = 512; spec_shake:
+		if (r | c | s | w | z)
+			usage();
+#ifdef SUPPORT_SHA3
+		libkeccak_spec_shake((struct libkeccak_spec *)&gspec, bits, bits);
+		suffix = LIBKECCAK_SHAKE_SUFFIX;
+#endif
+		break;
+	case LIBHASHSUM_RAWSHAKE128: bits = 128; goto spec_rawshake;
+	case LIBHASHSUM_RAWSHAKE256: bits = 256; goto spec_rawshake;
+	case LIBHASHSUM_RAWSHAKE512: bits = 512; spec_rawshake:
+		if (r | c | s | w | z)
+			usage();
+#ifdef SUPPORT_SHA3
+		libkeccak_spec_rawshake((struct libkeccak_spec *)&gspec, bits, bits);
+		suffix = LIBKECCAK_RAWSHAKE_SUFFIX;
+#endif
+		break;
+	default:
+	case LIBHASHSUM_MD2:
+	case LIBHASHSUM_MD4:
+	case LIBHASHSUM_MD5:
+	case LIBHASHSUM_RIPEMD_128:
+	case LIBHASHSUM_RIPEMD_160:
+	case LIBHASHSUM_RIPEMD_256:
+	case LIBHASHSUM_RIPEMD_320:
+	case LIBHASHSUM_SHA0:
+	case LIBHASHSUM_SHA1:
+	case LIBHASHSUM_SHA_224:
+	case LIBHASHSUM_SHA_256:
+	case LIBHASHSUM_SHA_384:
+	case LIBHASHSUM_SHA_512:
+	case LIBHASHSUM_SHA_512_224:
+	case LIBHASHSUM_SHA_512_256:
+	case LIBHASHSUM_BLAKE224:
+	case LIBHASHSUM_BLAKE256:
+	case LIBHASHSUM_BLAKE384:
+	case LIBHASHSUM_BLAKE512:
+		abort();
+	}
+
+	z = z ? z : 1U;
+
+#ifdef SUPPORT_SHA3
+	gspec.bitrate    = r ? r : gspec.bitrate;
+	gspec.capacity   = c ? c : gspec.capacity;
+	gspec.output     = n ? n : gspec.output;
+	gspec.state_size = s ? s : gspec.state_size;
+	gspec.word_size  = w ? w : gspec.word_size;
+
+# define CASE(N, S) case LIBKECCAK_GENERALISED_SPEC_ERROR_##N: eprintf("%s", S)
+	switch (libkeccak_degeneralise_spec(&gspec, &spec)) {
+	case 0:
+		break;
+	CASE(STATE_NONPOSITIVE,                    "the state size must be positive");
+	CASE(STATE_TOO_LARGE,                      "the state size is too large, may not exceed 1600");
+	CASE(STATE_MOD_25,                         "the state size must be a multiple of 25");
+	CASE(WORD_NONPOSITIVE,                     "the word size must be positive");
+	CASE(WORD_TOO_LARGE,                       "the word size is too large, may not exceed 64");
+	CASE(STATE_WORD_INCOHERENCY,               "the state size must be exactly 25 times the word size");
+	CASE(CAPACITY_NONPOSITIVE,                 "the capacity must be positive");
+	CASE(CAPACITY_MOD_8,                       "the capacity must be a multiple of 8");
+	CASE(BITRATE_NONPOSITIVE,                  "the rate must be positive");
+	CASE(BITRATE_MOD_8,                        "the rate must be a multiple of 8");
+	CASE(OUTPUT_NONPOSITIVE,                   "the output size must be positive");
+	CASE(STATE_BITRATE_CAPACITY_INCONSISTENCY, "the sum of the rate and capacity must equal"
+	                                           " the state size (25 times the word size)");
+	default:
+		eprintf("unknown error in algorithm parameters");
+	}
+# undef CASE
+
+# define CASE(N, S) case LIBKECCAK_SPEC_ERROR_##N: eprintf("%s", S)
+	switch (libkeccak_spec_check(&spec)) {
+	case 0:
+		break;
+	CASE(BITRATE_NONPOSITIVE,  "the rate size must be positive");
+	CASE(BITRATE_MOD_8,        "the rate must be a multiple of 8");
+	CASE(CAPACITY_NONPOSITIVE, "the capacity must be positive");
+	CASE(CAPACITY_MOD_8,       "the capacity must be a multiple of 8");
+	CASE(OUTPUT_NONPOSITIVE,   "the output size must be positive");
+	CASE(STATE_TOO_LARGE,      "the state size is too large, may not exceed 1600");
+	CASE(STATE_MOD_25,         "the state size must be a multiple of 25");
+	CASE(WORD_NON_2_POTENT,    "the word size must be a power of 2");
+	CASE(WORD_MOD_8,           "the word size must be a multiple of 8");
+	default:
+		eprintf("unknown error in algorithm parameters");
+	}
+# undef TEST
+
+	if (verbose) {
+		fprintf(stderr,        "rate: %li\n", gspec.bitrate);
+		fprintf(stderr,    "capacity: %li\n", gspec.capacity);
+		fprintf(stderr, "output size: %li\n", gspec.output);
+		fprintf(stderr,  "state size: %li\n", gspec.state_size);
+		fprintf(stderr,   "word size: %li\n", gspec.word_size);
+		fprintf(stderr,    "squeezes: %li\n", z);
+		fprintf(stderr,      "suffix: %s\n",  suffix);
+	}
+#else
+	(void) verbose;
+#endif
+
+	if (*algorithm == LIBHASHSUM_KECCAK && !s && !w)
+		*algostr = *algostrbuf = fmtalgostr(*algostr, r, c, n, z);
+
+#ifdef SUPPORT_SHA3
+	r = spec.bitrate;
+	c = spec.capacity;
+	n = spec.output;
+#else	
+	if (w && !s)
+		s = w * 25;
+	if (!!r + !!c == 2 && !s) {
+		n = n ? n : MAX(c * 2, 8);
+	} else if (!!r + !!c == 1) {
+		c = c ? c : (s ? s : 1600) - r;
+		r = r ? r : (s ? s : 1600) - c;
+		n = n ? n : MAX(c * 2, 8);
+	} else {
+		c = (s ? s : 1600) * 9 / 25;
+		r = (s ? s : 1600) - c;
+		n = n ? n : MAX(r / 2, 8);
+	}
+#endif
+
+	if (*algorithm == LIBHASHSUM_KECCAK && (s || w))
+		*algostr = *algostrbuf = fmtalgostr(*algostr, r, c, n, z);
+	else if (*algorithm != LIBHASHSUM_KECCAK && n != bits)
+		*algostr = *algostrbuf = fmtalgostr(*algostr, 0, 0, n, 0);
+
+	return argc;
+}
diff --git a/command.c b/command.c
new file mode 100644
index 0000000..d280766
--- /dev/null
+++ b/command.c
@@ -0,0 +1,101 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+enum command
+getcommand(const char **name_out, enum libhashsum_algorithm *algorithm_out)
+{
+	const char *name, *p;
+
+	name = strrchr(argv0, '/');
+	name = name ? &name[1] : argv0;
+
+	if (strstarts(name, "anysum")) {
+		name = &name[6];
+		while (isdigit(*name) || *name == '.' || *name == '_')
+			name++;
+		if (*name++ != '-')
+			return ANYSUM;
+	}
+
+	if (strcasestarts(name, "sha")) {
+		p = &name[3];
+		if (*p == '-')
+			p++;
+		if (*p++ == '3') {
+			if (!*p || !strcasecmp(p, "sum")) {
+				*algorithm_out = LIBHASHSUM_SHA3_224;
+				return SHA3SUM;
+			}
+		}
+	}
+
+	p = name;
+	if (*p != 'b' && *p != 'B')
+		goto specialised;
+	if (!strncasecmp(++p, "lake", 4))
+		p = &p[4];
+	if (*p && strcasecmp(p, "sum"))
+		goto specialised;
+	*name_out = "blake224";
+	*algorithm_out = LIBHASHSUM_BLAKE224;
+	return BSUM;
+
+specialised:
+	if (!libhashsum_get_algorithm_string(algorithm_out, name))
+		eprintf("invalid command name, is not \"anysum\" and "
+			"does not match any known hash function");
+	if (strchr(name, '['))
+		eprintf("invalid command name, cannot contain parameters");
+	*name_out = name;
+	return SPECIALISED;
+}
+
+
+enum command
+getsupercommand(enum command cmd, enum libhashsum_algorithm algo)
+{
+	if (cmd != SPECIALISED)
+		return cmd;
+	switch (algo) {
+	case LIBHASHSUM_MD2:
+	case LIBHASHSUM_MD4:
+	case LIBHASHSUM_MD5:
+	case LIBHASHSUM_RIPEMD_128:
+	case LIBHASHSUM_RIPEMD_160:
+	case LIBHASHSUM_RIPEMD_256:
+	case LIBHASHSUM_RIPEMD_320:
+	case LIBHASHSUM_SHA0:
+	case LIBHASHSUM_SHA1:
+	case LIBHASHSUM_SHA_224:
+	case LIBHASHSUM_SHA_256:
+	case LIBHASHSUM_SHA_384:
+	case LIBHASHSUM_SHA_512:
+	case LIBHASHSUM_SHA_512_224:
+	case LIBHASHSUM_SHA_512_256:
+		return SPECIALISED;
+	case LIBHASHSUM_KECCAK:
+	case LIBHASHSUM_KECCAK_224:
+	case LIBHASHSUM_KECCAK_256:
+	case LIBHASHSUM_KECCAK_384:
+	case LIBHASHSUM_KECCAK_512:
+	case LIBHASHSUM_SHA3_224:
+	case LIBHASHSUM_SHA3_256:
+	case LIBHASHSUM_SHA3_384:
+	case LIBHASHSUM_SHA3_512:
+	case LIBHASHSUM_SHAKE128:
+	case LIBHASHSUM_SHAKE256:
+	case LIBHASHSUM_SHAKE512:
+	case LIBHASHSUM_RAWSHAKE128:
+	case LIBHASHSUM_RAWSHAKE256:
+	case LIBHASHSUM_RAWSHAKE512:
+		return SHA3SUM;
+	case LIBHASHSUM_BLAKE224:
+	case LIBHASHSUM_BLAKE256:
+	case LIBHASHSUM_BLAKE384:
+	case LIBHASHSUM_BLAKE512:
+		return BSUM;
+	default:
+		eprintf("algorithm not recognised");
+	}
+}
diff --git a/common.h b/common.h
index af153b9..a228fbd 100644
--- a/common.h
+++ b/common.h
@@ -1,11 +1,24 @@
 /* See LICENSE file for copyright and license details. */
-#include <libsimple.h>
 #ifndef SINGLE_THREADED
 # include <pthread.h>
 #else
 # define pthread_barrier_t PhonyBarrier
 #endif
 #include <libhashsum.h>
+#include <libsimple.h>
+#include <libsimple-arg.h>
+LIBSIMPLE_NORETURN__ void usage(void);
+
+
+#if defined(__clang__)
+# pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
+# pragma clang diagnostic ignored "-Wcovered-switch-default"
+# pragma clang diagnostic ignored "-Wpadded"
+# pragma clang diagnostic ignored "-Wcomma"
+# pragma clang diagnostic ignored "-Wassign-enum"
+#elif defined(__GNUC__)
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+#endif
 
 
 struct thread_data;
@@ -19,6 +32,14 @@ typedef struct {
 #endif
 
 
+enum command {
+	SPECIALISED,
+	ANYSUM,
+	SHA3SUM,
+	BSUM
+};
+
+
 enum format {
 	BINARY        = 0,
 	LOWERCASE_HEX = 1,
@@ -31,9 +52,23 @@ enum format {
 };
 
 
+struct config {
+	enum format format;
+	int verify;
+	int warn_improper_format;
+	int hexinput;
+	int recursive;
+	struct algorithm *algorithms;
+	size_t nalgorithms;
+	size_t threads;
+};
+
+
 struct buffer {
 	char *buf;
-	size_t length;
+	size_t ready;
+	size_t procoff;
+	size_t offset;
 	size_t size;
 };
 
@@ -51,6 +86,7 @@ struct algorithm {
 struct global_data {
 	void (*action)(struct algorithm *, struct global_data *);
 	enum format format;
+	int hexinput;
 	const char *file;
 	struct buffer *buffer;
 	struct algorithm *algorithms;
@@ -75,17 +111,62 @@ struct thread_data {
 };
 
 
-int patheq(const char *have, const char *want, const char **end_out);
-int openfile(const char *path, int *is_new_fd_out, const char **fname_out);
-char *hex(char *out, const unsigned char *in, size_t n, const char *xdigits);
-void writeall(int fd, const void *data, size_t n, const char *fname);
+/* get.c */
+int calculate_and_print_each(char **files, struct algorithm *algorithms, size_t nalgorithms,
+                             size_t nthreads, enum format format, int hexinput, int recursive);
+
+/* check.c */
+int verify_checksums(char **files, struct algorithm *algorithms, size_t nalgorithms, size_t nthreads,
+                     enum format format, int warn_improper_format, int hexinput);
+
+/* barrier.c */
 void barrierwait(pthread_barrier_t *barrier);
-void barriersend(struct barrier_group *group, struct global_data *global, void (*action)(struct algorithm *, struct global_data *));
-void format_result(struct algorithm *algorithm, const char *file, enum format format);
-int feedbuffer(int fd, struct buffer *buffer, const char *fname);
+void barriersend(struct barrier_group *group, struct global_data *global,
+                 void (*action)(struct algorithm *, struct global_data *));
 void createbarriergroup(struct barrier_group *group_out, size_t count, struct global_data *global);
 void killbarriergroup(struct barrier_group *group, struct global_data *global);
+
+/* hash.c */
 size_t inithashers(struct algorithm *algorithms, size_t nalgorithms);
 void destroyhashers(struct algorithm *algorithms, size_t nalgorithms);
-void shiftbuffer(struct algorithm *algorithms, size_t nalgorithms, struct buffer *buffer);
 int calculate(const char *file, struct barrier_group *group, struct global_data *global);
+
+/* write.c */
+void writeall(int fd, const void *data, size_t n, const char *fname);
+char *hex(char *out, const unsigned char *in, size_t n, const char *xdigits);
+void format_result(struct algorithm *algorithm, const char *file, enum format format, int hexinput);
+
+/* open.c */
+int patheq(const char *have, const char *want, const char **end_out);
+int openfile(const char *path, int *is_new_fd_out, const char **fname_out);
+
+/* read.c */
+int feedbuffer(int fd, struct buffer *buffer, const char *fname);
+void shiftbuffer(struct algorithm *algorithms, size_t nalgorithms, struct buffer *buffer);
+int unhex(struct buffer *buffer);
+
+/* proc.c */
+size_t getnproc(size_t default_count);
+size_t getautonthreads(void);
+
+/* command.c */
+enum command getcommand(const char **name_out, enum libhashsum_algorithm *algorithm_out);
+enum command getsupercommand(enum command cmd, enum libhashsum_algorithm algo);
+
+/* opts.c */
+int parseopt_vendor(void /* (struct config) */ *config, char *opt, char *val);
+char *parseopts(void *config, char *string, int (*parseopt)(void *, char *opt, char *val));
+
+/* cmdline_bsum.c */
+int cmdline_bsum(int argc, char **argv, enum command command, struct config *config,
+                 const char **algostr, enum libhashsum_algorithm *algorithm, char **algostrbuf);
+
+/* cmdline_sha3sum.c */
+int cmdline_sha3sum(int argc, char **argv, enum command command, struct config *config,
+                    const char **algostr, enum libhashsum_algorithm *algorithm, char **algostrbuf);
+
+/* cmdline_other.c */
+int cmdline_other(int argc, char **argv, enum command command, struct config *config);
+
+/* cmdline.c */
+void cmdline(int *argcp, char ***argvp, struct config *config);
diff --git a/config.mk b/config.mk
index d746c19..a234217 100644
--- a/config.mk
+++ b/config.mk
@@ -72,3 +72,7 @@ SUPPORT_BLAKE384 = $(DEFAULT_SUPPORT)
 
 SUPPORT_BLAKE512 = $(DEFAULT_SUPPORT)
 # Requires libblake>=1.1
+
+
+# Uncomment if you don't want the aliases to anysum
+#ALIASES=
diff --git a/destroyhashers.c b/destroyhashers.c
deleted file mode 100644
index 0f05c03..0000000
--- a/destroyhashers.c
+++ /dev/null
@@ -1,12 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-destroyhashers(struct algorithm *algorithms, size_t nalgorithms)
-{
-	size_t i;
-	for (i = 0; i < nalgorithms; i++)
-		if (algorithms[i].hasher.destroy)
-			algorithms[i].hasher.destroy(&algorithms[i].hasher);
-}
diff --git a/feedbuffer.c b/feedbuffer.c
deleted file mode 100644
index 59ecae0..0000000
--- a/feedbuffer.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-int
-feedbuffer(int fd, struct buffer *buffer, const char *fname)
-{
-	ssize_t r;
-	if (buffer->length == buffer->size)
-		buffer->buf = erealloc(buffer->buf, buffer->size += 8096);
-again:
-	r = read(fd, &buffer->buf[buffer->length], buffer->size - buffer->length);
-	if (r <= 0) {
-		if (!r)
-			return 1;
-		if (errno == EINTR)
-			goto again;
-		weprintf("%s:", fname);
-		return -1;
-	}
-	buffer->length += (size_t)r;
-	return 0;
-}
diff --git a/get.c b/get.c
new file mode 100644
index 0000000..5758388
--- /dev/null
+++ b/get.c
@@ -0,0 +1,99 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+struct recursion_buffer {
+	char *buf;
+	size_t size;
+	size_t len;
+};
+
+
+static int
+calculate_and_print(const char *file, struct barrier_group *group, struct global_data *global, struct recursion_buffer *recbuf)
+{
+	struct dirent *f;
+	DIR *dir;
+	size_t i, len, old_len;
+
+	if (!recbuf)
+		goto as_file;
+	dir = opendir(file);
+	if (!dir)
+		goto as_file;
+	if (recbuf->size - recbuf->len < strlen(file) + 1U) {
+		recbuf->size = recbuf->len + strlen(file) + 1U;
+		recbuf->buf = erealloc(recbuf->buf, recbuf->size);
+	}
+	old_len = recbuf->len;
+	stpcpy(&recbuf->buf[recbuf->len], file);
+	recbuf->len += strlen(file);
+	if (recbuf->buf[recbuf->len - 1U] != '/')
+		recbuf->buf[recbuf->len++] = '/';
+	len = recbuf->len;
+	while ((errno = 0, f = readdir(dir))) {
+		if (recbuf->size - len < strlen(f->d_name) + 1U) {
+			recbuf->size = len + strlen(f->d_name) + 1U;
+			recbuf->buf = erealloc(recbuf->buf, recbuf->size);
+		}
+		stpcpy(&recbuf->buf[len], f->d_name);
+		if (calculate_and_print(recbuf->buf, group, global, recbuf))
+			goto recusion_error;
+	}
+	recbuf->len = old_len;
+	recbuf->buf[recbuf->len] = '\0';
+	if (errno) {
+		weprintf("%s:", file);
+	recusion_error:
+		closedir(dir);
+		return -1;
+	}
+	closedir(dir);
+	return 0;
+
+as_file:
+	global->file = file;
+	if (calculate(global->file, group, global))
+		return -1;
+	for (i = 0; i < global->nalgorithms; i++)
+		writeall(STDOUT_FILENO, global->algorithms[i].result, global->algorithms[i].result_length, "<stdout>");
+	return 0;
+}
+
+
+int
+calculate_and_print_each(char **files, struct algorithm *algorithms, size_t nalgorithms,
+                         size_t nthreads, enum format format, int hexinput, int recursive)
+{
+	struct recursion_buffer recbuf = {NULL, 0, 0};
+	size_t wanted_nalgorithms = nalgorithms;
+	struct buffer buffer = {0};
+	struct barrier_group group;
+	struct global_data global;
+	int ret = 0;
+
+	global.format = format;
+	global.hexinput = hexinput;
+	global.buffer = &buffer;
+	global.algorithms = algorithms;
+	global.nalgorithms = nalgorithms;
+
+	if (!nthreads)
+		nthreads = getautonthreads();
+	nthreads = MAX(MIN(nalgorithms, nthreads), 1U);
+
+	createbarriergroup(&group, nthreads, &global);
+
+	for (; *files; files++)
+		if (calculate_and_print(*files, &group, &global, recursive ? &recbuf : NULL))
+			ret = 2;
+
+	if (global.nalgorithms != wanted_nalgorithms)
+		ret = 2;
+
+	killbarriergroup(&group, &global);
+
+	free(buffer.buf);
+	free(recbuf.buf);
+	return ret;
+}
diff --git a/hash.c b/hash.c
new file mode 100644
index 0000000..0784c78
--- /dev/null
+++ b/hash.c
@@ -0,0 +1,98 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+size_t
+inithashers(struct algorithm *algorithms, size_t nalgorithms)
+{
+	size_t i;
+	for (i = 0; i < nalgorithms;) {
+		if (libhashsum_init_hasher_from_string(&algorithms[i].hasher, algorithms[i].algostr)) {
+			weprintf("%s:", algorithms[i].algostr);
+			free(algorithms[i].result);
+			/* keep order */
+			memmove(&algorithms[i], &algorithms[i + 1U], (--nalgorithms - i) * sizeof(*algorithms));
+		} else {
+			algorithms[i].offset = 0;
+			i++;
+		}
+	}
+	return nalgorithms;
+}
+
+
+void
+destroyhashers(struct algorithm *algorithms, size_t nalgorithms)
+{
+	size_t i;
+	for (i = 0; i < nalgorithms; i++)
+		if (algorithms[i].hasher.destroy)
+			algorithms[i].hasher.destroy(&algorithms[i].hasher);
+}
+
+
+static void
+process(struct algorithm *algorithm, struct global_data *global)
+{
+	size_t r;
+	r = algorithm->hasher.process(&algorithm->hasher,
+	                              &global->buffer->buf[algorithm->offset],
+	                              global->buffer->ready - algorithm->offset);
+	algorithm->offset += r;
+}
+
+
+static void
+finalise(struct algorithm *algorithm, struct global_data *global)
+{
+	if (algorithm->hasher.finalise_const(&algorithm->hasher, &global->buffer->buf[algorithm->offset],
+	                                     global->buffer->ready - algorithm->offset, 0))
+		abort();
+	format_result(algorithm, global->file, global->format, global->hexinput);
+}
+
+
+int
+calculate(const char *file, struct barrier_group *group, struct global_data *global)
+{
+	int fd, is_new_fd, r, ret = -1, saved_errno;
+	const char *fname;
+
+	global->nalgorithms = inithashers(global->algorithms, global->nalgorithms);
+	if (!global->nalgorithms)
+		return 0;
+
+	fd = openfile(file, &is_new_fd, &fname);
+	if (fd < 0)
+		return -1;
+
+	global->buffer->ready = 0;
+	global->buffer->procoff = 0;
+	global->buffer->offset = 0;
+	while (!(r = feedbuffer(fd, global->buffer, fname))) {
+		if (!global->hexinput) {
+			global->buffer->ready = global->buffer->offset;
+			global->buffer->procoff = global->buffer->offset;
+		} else {
+			if (unhex(global->buffer)) {
+				weprintf("%s: not a hexadecimal file", fname);
+				errno = 0;
+				goto fail;
+			}
+		}
+		barriersend(group, global, &process);
+		shiftbuffer(global->algorithms, global->nalgorithms, global->buffer);
+	}
+	if (r < 0)
+		goto fail;
+
+	barriersend(group, global, &finalise);
+	ret = 0;
+fail:
+	saved_errno = errno;
+	destroyhashers(global->algorithms, global->nalgorithms);
+	if (is_new_fd)
+		close(fd);
+	errno = saved_errno;
+	return ret;
+}
diff --git a/hex.c b/hex.c
deleted file mode 100644
index abb2ede..0000000
--- a/hex.c
+++ /dev/null
@@ -1,13 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-char *
-hex(char *out, const unsigned char *in, size_t n, const char *xdigits)
-{
-	for (; n--; in++) {
-		*out++ = xdigits[(*in >> 4) & 15];
-		*out++ = xdigits[(*in >> 0) & 15];
-	}
-	return out;
-}
diff --git a/inithashers.c b/inithashers.c
deleted file mode 100644
index ff2dbfd..0000000
--- a/inithashers.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-size_t
-inithashers(struct algorithm *algorithms, size_t nalgorithms)
-{
-	size_t i;
-	for (i = 0; i < nalgorithms;) {
-		if (libhashsum_init_hasher_from_string(&algorithms[i].hasher, algorithms[i].algostr)) {
-			weprintf("%s:", algorithms[i].algostr);
-			free(algorithms[i].result);
-			/* keep order */
-			memmove(&algorithms[i], &algorithms[i + 1U], (--nalgorithms - i) * sizeof(*algorithms));
-		} else {
-			algorithms[i].offset = 0;
-			i++;
-		}
-	}
-	return nalgorithms;
-}
diff --git a/keccak224sum.1 b/keccak224sum.1
new file mode 100644
index 0000000..f1761e3
--- /dev/null
+++ b/keccak224sum.1
@@ -0,0 +1,209 @@
+.TH KECCAK224SUM 1 anysum
+.SH NAME
+keccak224sum - compute or verify against multiple Keccak-224 hashes
+
+.SH SYNOPSIS
+.B keccak224sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B keccak224sum
+utility calculates and prints or checks Keccak-224
+(Keccak[r=1152,c=448,n=224]) checksums.
+.PP
+The
+.B keccak224sum
+utility can also check a file against multiple Keccak-224
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The keccak224sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/keccak256sum.1 b/keccak256sum.1
new file mode 100644
index 0000000..e39bf56
--- /dev/null
+++ b/keccak256sum.1
@@ -0,0 +1,209 @@
+.TH KECCAK256SUM 1 anysum
+.SH NAME
+keccak256sum - compute or verify against multiple Keccak-256 hashes
+
+.SH SYNOPSIS
+.B keccak256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B keccak256sum
+utility calculates and prints or checks Keccak-256
+(Keccak[r=1088,c=512,n=256]) checksums.
+.PP
+The
+.B keccak256sum
+utility can also check a file against multiple Keccak-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The keccak256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/keccak384sum.1 b/keccak384sum.1
new file mode 100644
index 0000000..774ca03
--- /dev/null
+++ b/keccak384sum.1
@@ -0,0 +1,209 @@
+.TH KECCAK384SUM 1 anysum
+.SH NAME
+keccak384sum - compute or verify against multiple Keccak-384 hashes
+
+.SH SYNOPSIS
+.B keccak384sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B keccak384sum
+utility calculates and prints or checks Keccak-384
+(Keccak[r=832,c=768,n=384]) checksums.
+.PP
+The
+.B keccak384sum
+utility can also check a file against multiple Keccak-384
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The keccak384sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/keccak512sum.1 b/keccak512sum.1
new file mode 100644
index 0000000..4858004
--- /dev/null
+++ b/keccak512sum.1
@@ -0,0 +1,209 @@
+.TH KECCAK512SUM 1 anysum
+.SH NAME
+keccak512sum - compute or verify against multiple Keccak-512 hashes
+
+.SH SYNOPSIS
+.B keccak512sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B keccak512sum
+utility calculates and prints or checks Keccak-512
+(Keccak[r=576,c=1024,n=512]) checksums.
+.PP
+The
+.B keccak512sum
+utility can also check a file against multiple Keccak-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The keccak512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/keccaksum.1 b/keccaksum.1
new file mode 100644
index 0000000..8b27314
--- /dev/null
+++ b/keccaksum.1
@@ -0,0 +1,241 @@
+.TH KECCAKSUM 1 anysum
+.SH NAME
+keccaksum - compute or verify against multiple Keccak hashes
+
+.SH SYNOPSIS
+.B keccaksum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -R
+.IR bitrate ]
+.RB [ -C
+.IR capacity ]
+.RB [ -N
+.IR hashsize ]
+.RB [ -S
+.IR statesize ]
+.RB [ -W
+.IR statesize ]
+.RB [ -Z
+.IR squeezes ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B keccaksum
+utility calculates and prints or checks Keccak
+(Keccak[r=1152,c=448,n=224]) checksums.
+.PP
+The
+.B keccaksum
+utility can also check a file against multiple Keccak
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The keccaksum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.BR -C \ \fIcapacity\fP
+The capacity, in bits, for the Keccak function.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N , -O \ \fIhashsize\fP
+The output size in bits.
+.TP
+.BR -R \ \fIbitrate\fP
+The bitrate for the Keccak function.
+.TP
+.BR -S , -B \ \fIstatesize\fP
+The state-size, in bits, for the Keccak function.
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIwordsize\fP
+The word-size, in bits, for the Keccak function.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.BR -Z \ \fIsqueeze\fP
+The number of squeezes to perform on at the end phase
+of the Keccak function (this changes the hash but not
+the length of the hash).
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/killbarriergroup.c b/killbarriergroup.c
deleted file mode 100644
index f83317e..0000000
--- a/killbarriergroup.c
+++ /dev/null
@@ -1,29 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-killbarriergroup(struct barrier_group *group, struct global_data *global)
-{
-#ifndef SINGLE_THREADED
-	size_t i;
-
-	if (!group->nthreads)
-		return;
-
-	global->action = NULL;
-	for (i = 0; i < group->nthreads; i++)
-		group->threads[i].global = global;
-	barrierwait(&group->barrier);
-
-	for (i = 0; i < group->nthreads; i++)
-		if ((errno = pthread_join(group->threads[i].thread, NULL)))
-			weprintf("pthread_join:");
-	pthread_barrier_destroy(&group->barrier);
-
-	free(group->threads);
-#else
-	(void) group;
-	(void) global;
-#endif
-}
diff --git a/md2sum.1 b/md2sum.1
new file mode 100644
index 0000000..6460c53
--- /dev/null
+++ b/md2sum.1
@@ -0,0 +1,203 @@
+.TH MD2SUM 1 anysum
+.SH NAME
+md2sum - compute or verify against multiple MD2 hashes
+
+.SH SYNOPSIS
+.B md2sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B md2sum
+utility calculates and prints or checks MD2 checksums.
+.PP
+The
+.B md2sum
+utility can also check a file against multiple MD2
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The md2sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+.PP
+Be advised that MD2 is partially compromised.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/md4sum.1 b/md4sum.1
new file mode 100644
index 0000000..7fb1ddb
--- /dev/null
+++ b/md4sum.1
@@ -0,0 +1,203 @@
+.TH MD4SUM 1 anysum
+.SH NAME
+md4sum - compute or verify against multiple MD4 hashes
+
+.SH SYNOPSIS
+.B md4sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B md4sum
+utility calculates and prints or checks MD4 checksums.
+.PP
+The
+.B md4sum
+utility can also check a file against multiple MD4
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The md4sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+.PP
+Be advised that MD4 is compromised.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/md5sum.1 b/md5sum.1
new file mode 100644
index 0000000..e342b7d
--- /dev/null
+++ b/md5sum.1
@@ -0,0 +1,203 @@
+.TH MD5SUM 1 anysum
+.SH NAME
+md5sum - compute or verify against multiple MD5 hashes
+
+.SH SYNOPSIS
+.B md5sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B md5sum
+utility calculates and prints or checks MD5 checksums.
+.PP
+The
+.B md5sum
+utility can also check a file against multiple MD5
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The md5sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+.PP
+Be advised that MD5 is compromised.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/mk/before-config.mk b/mk/before-config.mk
index c77dd47..cf000f5 100644
--- a/mk/before-config.mk
+++ b/mk/before-config.mk
@@ -19,3 +19,24 @@ SUPPORT_BLAKE224 = $(DEFAULT_SUPPORT)
 SUPPORT_BLAKE256 = $(DEFAULT_SUPPORT)
 SUPPORT_BLAKE384 = $(DEFAULT_SUPPORT)
 SUPPORT_BLAKE512 = $(DEFAULT_SUPPORT)
+
+ALIASES =\
+	$(ALIASES_MD2)\
+	$(ALIASES_MD4)\
+	$(ALIASES_MD5)\
+	$(ALIASES_RIPEMD_128)\
+	$(ALIASES_RIPEMD_160)\
+	$(ALIASES_RIPEMD_256)\
+	$(ALIASES_RIPEMD_320)\
+	$(ALIASES_SHA0)\
+	$(ALIASES_SHA1)\
+	$(ALIASES_SHA2)\
+	$(ALIASES_SHA3)\
+	$(ALIASES_KECCAK)\
+	$(ALIASES_SHAKE)\
+	$(ALIASES_RAWSHAKE)\
+	$(ALIASES_BLAKE)\
+	$(ALIASES_BLAKE224)\
+	$(ALIASES_BLAKE256)\
+	$(ALIASES_BLAKE384)\
+	$(ALIASES_BLAKE512)
diff --git a/mk/blake224=yes.mk b/mk/blake224=yes.mk
index 765741c..246dda2 100644
--- a/mk/blake224=yes.mk
+++ b/mk/blake224=yes.mk
@@ -2,3 +2,6 @@ CPPFLAGS_BLAKE224 = -DSUPPORT_BLAKE224
 
 CPPFLAGS_LIBBLAKE_IF_SUPPORTED = $(CPPFLAGS_LIBBLAKE)
 LDFLAGS_LIBBLAKE_IF_SUPPORTED = $(LDFLAGS_LIBBLAKE)
+
+ALIASES_BLAKE = bsum
+ALIASES_BLAKE224 = b224sum
diff --git a/mk/blake256=yes.mk b/mk/blake256=yes.mk
index 6098067..9a054dc 100644
--- a/mk/blake256=yes.mk
+++ b/mk/blake256=yes.mk
@@ -2,3 +2,6 @@ CPPFLAGS_BLAKE256 = -DSUPPORT_BLAKE256
 
 CPPFLAGS_LIBBLAKE_IF_SUPPORTED = $(CPPFLAGS_LIBBLAKE)
 LDFLAGS_LIBBLAKE_IF_SUPPORTED = $(LDFLAGS_LIBBLAKE)
+
+ALIASES_BLAKE = bsum
+ALIASES_BLAKE256 = b256sum
diff --git a/mk/blake384=yes.mk b/mk/blake384=yes.mk
index fb66021..82d7e1b 100644
--- a/mk/blake384=yes.mk
+++ b/mk/blake384=yes.mk
@@ -2,3 +2,6 @@ CPPFLAGS_BLAKE384 = -DSUPPORT_BLAKE384
 
 CPPFLAGS_LIBBLAKE_IF_SUPPORTED = $(CPPFLAGS_LIBBLAKE)
 LDFLAGS_LIBBLAKE_IF_SUPPORTED = $(LDFLAGS_LIBBLAKE)
+
+ALIASES_BLAKE = bsum
+ALIASES_BLAKE384 = b384sum
diff --git a/mk/blake512=yes.mk b/mk/blake512=yes.mk
index df46eb7..33d1b6c 100644
--- a/mk/blake512=yes.mk
+++ b/mk/blake512=yes.mk
@@ -2,3 +2,6 @@ CPPFLAGS_BLAKE512 = -DSUPPORT_BLAKE512
 
 CPPFLAGS_LIBBLAKE_IF_SUPPORTED = $(CPPFLAGS_LIBBLAKE)
 LDFLAGS_LIBBLAKE_IF_SUPPORTED = $(LDFLAGS_LIBBLAKE)
+
+ALIASES_BLAKE = bsum
+ALIASES_BLAKE512 = b512sum
diff --git a/mk/keccak=yes.mk b/mk/keccak=yes.mk
index d35f3e2..8219267 100644
--- a/mk/keccak=yes.mk
+++ b/mk/keccak=yes.mk
@@ -2,3 +2,5 @@ CPPFLAGS_KECCAK = -DSUPPORT_KECCAK
 
 CPPFLAGS_LIBKECCAK_IF_SUPPORTED = $(CPPFLAGS_LIBKECCAK)
 LDFLAGS_LIBKECCAK_IF_SUPPORTED = $(LDFLAGS_LIBKECCAK)
+
+ALIASES_KECCAK = keccaksum keccak224sum keccak256sum keccak384sum keccak512sum
diff --git a/mk/md2=yes.mk b/mk/md2=yes.mk
index b387519..a19a5b9 100644
--- a/mk/md2=yes.mk
+++ b/mk/md2=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_MD2 = -DSUPPORT_MD2
+
+ALIASES_MD2 = md2sum
diff --git a/mk/md4=yes.mk b/mk/md4=yes.mk
index 71ea9db..7aead6b 100644
--- a/mk/md4=yes.mk
+++ b/mk/md4=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_MD4 = -DSUPPORT_MD4
+
+ALIASES_MD4 = md4sum
diff --git a/mk/md5=yes.mk b/mk/md5=yes.mk
index 4a537e7..4032545 100644
--- a/mk/md5=yes.mk
+++ b/mk/md5=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_MD5 = -DSUPPORT_MD5
+
+ALIASES_MD5 = md5sum
diff --git a/mk/rawshake=yes.mk b/mk/rawshake=yes.mk
index d41ab71..b863014 100644
--- a/mk/rawshake=yes.mk
+++ b/mk/rawshake=yes.mk
@@ -2,3 +2,5 @@ CPPFLAGS_RAWSHAKE = -DSUPPORT_RAWSHAKE
 
 CPPFLAGS_LIBKECCAK_IF_SUPPORTED = $(CPPFLAGS_LIBKECCAK)
 LDFLAGS_LIBKECCAK_IF_SUPPORTED = $(LDFLAGS_LIBKECCAK)
+
+ALIASES_RAWSHAKE = rawshake128sum rawshake256sum rawshake512sum
diff --git a/mk/ripemd-128=yes.mk b/mk/ripemd-128=yes.mk
index 20ccc01..4e9816d 100644
--- a/mk/ripemd-128=yes.mk
+++ b/mk/ripemd-128=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_RIPEMD_128 = -DSUPPORT_RIPEMD_128
+
+ALIASES_RIPEMD_128 = rmd128sum
diff --git a/mk/ripemd-160=yes.mk b/mk/ripemd-160=yes.mk
index a7bdaef..142e040 100644
--- a/mk/ripemd-160=yes.mk
+++ b/mk/ripemd-160=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_RIPEMD_160 = -DSUPPORT_RIPEMD_160
+
+ALIASES_RIPEMD_160 = rmd160sum
diff --git a/mk/ripemd-256=yes.mk b/mk/ripemd-256=yes.mk
index 5ad2c42..720e7f2 100644
--- a/mk/ripemd-256=yes.mk
+++ b/mk/ripemd-256=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_RIPEMD_256 = -DSUPPORT_RIPEMD_256
+
+ALIASES_RIPEMD_256 = rmd256sum
diff --git a/mk/ripemd-320=yes.mk b/mk/ripemd-320=yes.mk
index fefe259..51b51d5 100644
--- a/mk/ripemd-320=yes.mk
+++ b/mk/ripemd-320=yes.mk
@@ -1 +1,3 @@
 CPPFLAGS_RIPEMD_320 = -DSUPPORT_RIPEMD_320
+
+ALIASES_RIPEMD_320 = rmd320sum
diff --git a/mk/sha1=yes.mk b/mk/sha1=yes.mk
index c15ebc3..88106b6 100644
--- a/mk/sha1=yes.mk
+++ b/mk/sha1=yes.mk
@@ -1,2 +1,5 @@
 CPPFLAGS_SHA1 = $(CPPFLAGS_LIBSHA1) -DSUPPORT_SHA0 -DSUPPORT_SHA1
 LDFLAGS_SHA1 = $(LDFLAGS_LIBSHA1)
+
+ALIASES_SHA0 = sha0sum
+ALIASES_SHA1 = sha1sum
diff --git a/mk/sha2=yes.mk b/mk/sha2=yes.mk
index cb26c08..c7e677b 100644
--- a/mk/sha2=yes.mk
+++ b/mk/sha2=yes.mk
@@ -1,2 +1,4 @@
 CPPFLAGS_SHA2 = $(CPPFLAGS_LIBSHA2) -DSUPPORT_SHA2
 LDFLAGS_SHA2 = $(LDFLAGS_LIBSHA2)
+
+ALIASES_SHA2 = sha224sum sha256sum sha384sum sha512sum sha512-224sum sha512-256sum
diff --git a/mk/sha3=yes.mk b/mk/sha3=yes.mk
index 3d255f5..c01fade 100644
--- a/mk/sha3=yes.mk
+++ b/mk/sha3=yes.mk
@@ -2,3 +2,5 @@ CPPFLAGS_SHA3 = -DSUPPORT_SHA3
 
 CPPFLAGS_LIBKECCAK_IF_SUPPORTED = $(CPPFLAGS_LIBKECCAK)
 LDFLAGS_LIBKECCAK_IF_SUPPORTED = $(LDFLAGS_LIBKECCAK)
+
+ALIASES_SHA3 = sha3sum sha3-224sum sha3-256sum sha3-384sum sha3-512sum
diff --git a/mk/shake=yes.mk b/mk/shake=yes.mk
index b3f1fbc..5bea3ff 100644
--- a/mk/shake=yes.mk
+++ b/mk/shake=yes.mk
@@ -2,3 +2,5 @@ CPPFLAGS_SHAKE = -DSUPPORT_SHAKE
 
 CPPFLAGS_LIBKECCAK_IF_SUPPORTED = $(CPPFLAGS_LIBKECCAK)
 LDFLAGS_LIBKECCAK_IF_SUPPORTED = $(LDFLAGS_LIBKECCAK)
+
+ALIASES_SHAKE = shake128sum shake256sum shake512sum
diff --git a/openfile.c b/open.c
index e019d05..8d1a4c5 100644
--- a/openfile.c
+++ b/open.c
@@ -3,6 +3,24 @@
 
 
 int
+patheq(const char *have, const char *want, const char **end_out)
+{
+	while (*want) {
+		if (*have != *want)
+			return 0;
+		if (*have == '/') {
+			while (*++have == '/');
+			while (*++want == '/');
+		}
+	}
+	if (!end_out)
+		return !*have;
+	*end_out = have;
+	return 1;
+}
+
+
+int
 openfile(const char *path, int *is_new_fd_out, const char **fname_out)
 {
 	const char *p;
diff --git a/opts.c b/opts.c
new file mode 100644
index 0000000..5c264dd
--- /dev/null
+++ b/opts.c
@@ -0,0 +1,130 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+static int
+sizeopt(size_t *valp, const char *s)
+{
+	if (isdigit(*s))
+		return 0;
+	*valp = 0;
+	for (; isdigit(*s); s++) {
+		if (*valp * 10U + (size_t)(*s & 15) > SIZE_MAX)
+			*valp = SIZE_MAX;
+		else
+			*valp = *valp * 10U + (size_t)(*s & 15);
+	}
+	return !*s;
+}
+
+
+int
+parseopt_vendor(void *config_, char *opt, char *val)
+{
+	struct config *config = config_;
+	if (!strcmp(opt, "output")) {
+		if (!val)
+			eprintf("-W option \"%s\" should have an associated value", opt);
+		config->format &= (enum format)~FORMAT_MASK;
+		if (!strcmp(val, "lowercase"))
+			config->format |= LOWERCASE_HEX;
+		else if (!strcmp(val, "uppercase"))
+			config->format |= UPPERCASE_HEX;
+		else if (!strcmp(val, "binary"))
+			config->format |= BINARY;
+		else
+			eprintf("-W option \"%s\" expected value \"lowercase\", \"uppercase\", or \"binary\"", opt);
+
+	} else if (!strcmp(opt, "input")) {
+		if (!val)
+			eprintf("-W option \"%s\" should have an associated value", opt);
+		config->format &= (enum format)~FORMAT_MASK;
+		if (!strcmp(val, "binary") || !strcmp(val, "text"))
+			config->hexinput = 0;
+		else if (!strcmp(val, "hexadecimal"))
+			config->hexinput = 1;
+		else
+			eprintf("-W option \"%s\" expected value \"binary\", \"text\", or \"hexadecimal\"", opt);
+
+	} else if (!strcmp(opt, "threads")) {
+		if (!val)
+			eprintf("-W option \"%s\" should have an associated value", opt);
+		if (!strcmp(val, "auto"))
+			config->threads = 0;
+		else if (!sizeopt(&config->threads, val) || !config->threads)
+			eprintf("-W option \"%s\" expected positive integer value or \"auto\"", opt);
+
+	} else if (!strcmp(opt, "recursive")) {
+		/* TODO the default behaviour should be to not traverse across mount points,
+		 *      not to not follow symbolic links, however this should be tweakable */
+		if (!val)
+			eprintf("-W option \"%s\" should not have an associated value", opt);
+		config->recursive = 1;
+
+	} else if (!strcmp(opt, "no-recursive")) {
+		if (!val)
+			eprintf("-W option \"%s\" should not have an associated value", opt);
+		config->recursive = 0;
+
+	} else {
+		return 0;
+	}
+	return 1;
+}
+
+
+char *
+parseopts(void *config, char *string, int (*parseopt)(void *, char *opt, char *val))
+{
+	char *opt, *r = string, c, *val;
+	char *w = string;
+	size_t brackets = 0;
+
+	for (;;) {
+		opt = r;
+		while (*r && *r != ',' && *r != '=')
+			r++;
+		for (; *r; r++) {
+			if (*r == '[' || *r == '(' || *r == '{')
+				brackets++;
+			else if (brackets && (*r == ']' || *r == ')' || *r == '}'))
+				brackets--;
+			else if (!brackets && (*r == ',' || *r == '='))
+				break;
+		}
+		c = *r;
+		*r++ = '\0';
+		val = NULL;
+		if (c == '=') {
+			val = r;
+			for (; *r; r++) {
+				if (*r == '[' || *r == '(' || *r == '{')
+					brackets++;
+				else if (brackets && (*r == ']' || *r == ')' || *r == '}'))
+					brackets--;
+				else if (!brackets && *r == ',')
+					break;
+			}
+			c = *r;
+			*r++ = '\0';
+		}
+
+		if (!(*parseopt)(config, opt, val)) {
+			if (*opt || val) {
+				if (w != string)
+					*w++ = ',';
+				w = stpcpy(w, opt);
+				if (val) {
+					*w++ = '=';
+					w = stpcpy(w, val);
+				}
+			}
+		}
+
+		if (!c)
+			break;
+	}
+
+	*w = '\0';
+	return string;
+}
diff --git a/patheq.c b/patheq.c
deleted file mode 100644
index a23388d..0000000
--- a/patheq.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-int
-patheq(const char *have, const char *want, const char **end_out)
-{
-	while (*want) {
-		if (*have != *want)
-			return 0;
-		if (*have == '/') {
-			while (*++have == '/');
-			while (*++want == '/');
-		}
-	}
-	if (!end_out)
-		return !*have;
-	*end_out = have;
-	return 1;
-}
diff --git a/proc.c b/proc.c
new file mode 100644
index 0000000..08e9252
--- /dev/null
+++ b/proc.c
@@ -0,0 +1,73 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+size_t
+getnproc(size_t default_count)
+{
+	char buf[128];
+	int fd, num = 0;
+	size_t n = 0, off = 0, len = 0;
+	size_t nums[] = {0, 0};
+	ssize_t r;
+	size_t last = 0;
+
+	fd = open("/sys/devices/system/cpu/online", O_RDONLY);
+	if (fd < 0)
+		return default_count;
+
+	for (;; off++) {
+		if (off == len) {
+			r = read(fd, buf, sizeof(buf));
+			if (r <= 0) {
+				if (!r)
+					break;
+				if (errno == EINTR)
+					continue;
+			error:
+				n = default_count;
+				goto out;
+			}
+			len = (size_t)r;
+			off = 0;
+		}
+
+		if (buf[off] == '-') {
+			if (num++ == 1)
+				goto error;
+		} else if (buf[off] == ',' || buf[off] == '\n') {
+			if (num == 0) {
+				nums[1] = nums[0];
+			} else {
+				num = 0;
+				if (nums[1] < nums[0])
+					goto error;
+			}
+			if (nums[0] < last)
+				goto error;
+			last = nums[0];
+			if (nums[1] - nums[0] + 1U > SIZE_MAX - n)
+				goto error;
+			n += nums[1] - nums[0] + 1U;
+		} else if (isdigit(buf[off])) {
+			if (nums[num] > (SIZE_MAX - (size_t)(buf[off] & 15)) / 10U)
+				goto error;
+			nums[num] = nums[num] * 10U + (size_t)(buf[off] & 15);
+		} else {
+			goto error;
+		}
+	}
+
+	n = n ? n : default_count;
+out:
+	close(fd);
+	return n;
+}
+
+
+size_t
+getautonthreads(void)
+{
+	size_t n = getnproc(8U);
+	return n < 3U ? 1U : n - 2U;
+}
diff --git a/rawshake128sum.1 b/rawshake128sum.1
new file mode 100644
index 0000000..d3fa614
--- /dev/null
+++ b/rawshake128sum.1
@@ -0,0 +1,214 @@
+.TH RAWSHAKE128SUM 1 anysum
+.SH NAME
+rawshake128sum - compute or verify against multiple RawSHAKE-128 hashes
+
+.SH SYNOPSIS
+.B rawshake128sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rawshake128sum
+utility calculates and prints or checks RawSHAKE-128
+checksums.
+.PP
+The
+.B rawshake128sum
+utility can also check a file against multiple RawSHAKE-128
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rawshake128sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 128.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/rawshake256sum.1 b/rawshake256sum.1
new file mode 100644
index 0000000..5932407
--- /dev/null
+++ b/rawshake256sum.1
@@ -0,0 +1,214 @@
+.TH RAWSHAKE256SUM 1 anysum
+.SH NAME
+rawshake256sum - compute or verify against multiple RawSHAKE-256 hashes
+
+.SH SYNOPSIS
+.B rawshake256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rawshake256sum
+utility calculates and prints or checks RawSHAKE-256
+checksums.
+.PP
+The
+.B rawshake256sum
+utility can also check a file against multiple RawSHAKE-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rawshake256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 256.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/rawshake512sum.1 b/rawshake512sum.1
new file mode 100644
index 0000000..81df55c
--- /dev/null
+++ b/rawshake512sum.1
@@ -0,0 +1,214 @@
+.TH RAWSHAKE512SUM 1 anysum
+.SH NAME
+rawshake512sum - compute or verify against multiple RawSHAKE-512 hashes
+
+.SH SYNOPSIS
+.B rawshake512sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rawshake512sum
+utility calculates and prints or checks RawSHAKE-512
+checksums.
+.PP
+The
+.B rawshake512sum
+utility can also check a file against multiple RawSHAKE-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rawshake512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 512.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/read.c b/read.c
new file mode 100644
index 0000000..07cf893
--- /dev/null
+++ b/read.c
@@ -0,0 +1,78 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+feedbuffer(int fd, struct buffer *buffer, const char *fname)
+{
+	ssize_t r;
+	if (buffer->offset == buffer->size)
+		buffer->buf = erealloc(buffer->buf, buffer->size += 8096);
+again:
+	r = read(fd, &buffer->buf[buffer->offset], buffer->size - buffer->offset);
+	if (r <= 0) {
+		if (!r)
+			return 1;
+		if (errno == EINTR)
+			goto again;
+		weprintf("%s:", fname);
+		return -1;
+	}
+	buffer->offset += (size_t)r;
+	return 0;
+}
+
+
+void
+shiftbuffer(struct algorithm *algorithms, size_t nalgorithms, struct buffer *buffer)
+{
+	size_t i, consumed = SIZE_MAX;
+	for (i = 0; i < nalgorithms; i++)
+		consumed = MIN(consumed, algorithms[i].offset);
+	if (!consumed)
+		return;
+	for (i = 0; i < nalgorithms; i++)
+		algorithms[i].offset -= consumed;
+	memmove(&buffer->buf[0], &buffer->buf[consumed], buffer->ready -= consumed);
+	memmove(&buffer->buf[buffer->ready], &buffer->buf[buffer->procoff], buffer->offset - buffer->procoff);
+	buffer->offset -= buffer->procoff - buffer->ready;
+	buffer->procoff = buffer->ready;
+}
+
+
+int
+unhex(struct buffer *buffer)
+{
+	size_t i = buffer->procoff;
+	char a, b;
+
+	for (;;) {
+		while (i < buffer->offset && isspace(buffer->buf[i]))
+			i++;
+		if (i == buffer->offset)
+			break;
+
+		buffer->procoff = i;
+		if (!isxdigit(buffer->buf[i]))
+			return -1;
+		a = buffer->buf[i++];
+
+		while (i < buffer->offset && isspace(buffer->buf[i]))
+			i++;
+		if (i == buffer->offset)
+			break;
+
+		if (!isxdigit(buffer->buf[i]))
+			return -1;
+		b = buffer->buf[i++];
+		buffer->procoff = i;
+
+		a = (char)((a & 15) + (a > '9' ? 9 : 0));
+		b = (char)((b & 15) + (b > '9' ? 9 : 0));
+		a <<= 4;
+		a |= b;
+		buffer->buf[buffer->ready++] = a;
+	}
+
+	return 0;
+}
diff --git a/rmd128sum.1 b/rmd128sum.1
new file mode 100644
index 0000000..c19de2d
--- /dev/null
+++ b/rmd128sum.1
@@ -0,0 +1,201 @@
+.TH RMD128SUM 1 anysum
+.SH NAME
+rmd128sum - compute or verify against multiple RIPEMD-128 hashes
+
+.SH SYNOPSIS
+.B rmd128sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rmd128sum
+utility calculates and prints or checks RIPEMD-128 checksums.
+.PP
+The
+.B rmd128sum
+utility can also check a file against multiple RIPEMD-128
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rmd128sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/rmd160sum.1 b/rmd160sum.1
new file mode 100644
index 0000000..e470631
--- /dev/null
+++ b/rmd160sum.1
@@ -0,0 +1,201 @@
+.TH RMD160SUM 1 anysum
+.SH NAME
+rmd160sum - compute or verify against multiple RIPEMD-160 hashes
+
+.SH SYNOPSIS
+.B rmd160sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rmd160sum
+utility calculates and prints or checks RIPEMD-160 checksums.
+.PP
+The
+.B rmd160sum
+utility can also check a file against multiple RIPEMD-160
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rmd160sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/rmd256sum.1 b/rmd256sum.1
new file mode 100644
index 0000000..125dc68
--- /dev/null
+++ b/rmd256sum.1
@@ -0,0 +1,201 @@
+.TH RMD256SUM 1 anysum
+.SH NAME
+rmd256sum - compute or verify against multiple RIPEMD-256 hashes
+
+.SH SYNOPSIS
+.B rmd256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rmd256sum
+utility calculates and prints or checks RIPEMD-256 checksums.
+.PP
+The
+.B rmd256sum
+utility can also check a file against multiple RIPEMD-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rmd256sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/rmd320sum.1 b/rmd320sum.1
new file mode 100644
index 0000000..463ef3b
--- /dev/null
+++ b/rmd320sum.1
@@ -0,0 +1,201 @@
+.TH RMD320SUM 1 anysum
+.SH NAME
+rmd320sum - compute or verify against multiple RIPEMD-320 hashes
+
+.SH SYNOPSIS
+.B rmd320sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B rmd320sum
+utility calculates and prints or checks RIPEMD-320 checksums.
+.PP
+The
+.B rmd320sum
+utility can also check a file against multiple RIPEMD-320
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The rmd320sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha0sum.1 b/sha0sum.1
new file mode 100644
index 0000000..b909e7c
--- /dev/null
+++ b/sha0sum.1
@@ -0,0 +1,203 @@
+.TH SHA0SUM 1 anysum
+.SH NAME
+sha0sum - compute or verify against multiple SHA-0 hashes
+
+.SH SYNOPSIS
+.B sha0sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha0sum
+utility calculates and prints or checks SHA-0 checksums.
+.PP
+The
+.B sha0sum
+utility can also check a file against multiple SHA-0
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha0sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+.PP
+Be advised that SHA-0 is compromised.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha1sum.1 b/sha1sum.1
new file mode 100644
index 0000000..f54dbe7
--- /dev/null
+++ b/sha1sum.1
@@ -0,0 +1,203 @@
+.TH SHA1SUM 1 anysum
+.SH NAME
+sha1sum - compute or verify against multiple SHA-1 hashes
+
+.SH SYNOPSIS
+.B sha1sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha1sum
+utility calculates and prints or checks SHA-1 checksums.
+.PP
+The
+.B sha1sum
+utility can also check a file against multiple SHA-1
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha1sum utility conforms to the Base Definitions volume of
+POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+.PP
+Be advised that SHA-1 is compromised.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha224sum.1 b/sha224sum.1
new file mode 100644
index 0000000..5894ef8
--- /dev/null
+++ b/sha224sum.1
@@ -0,0 +1,202 @@
+.TH SHA224SUM 1 anysum
+.SH NAME
+sha224sum - compute or verify against multiple SHA-224 hashes
+
+.SH SYNOPSIS
+.B sha224sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha224sum
+utility calculates and prints or checks SHA-224 (SHA-2)
+checksums.
+.PP
+The
+.B sha224sum
+utility can also check a file against multiple SHA-224
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha224sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha256sum.1 b/sha256sum.1
new file mode 100644
index 0000000..eb23644
--- /dev/null
+++ b/sha256sum.1
@@ -0,0 +1,202 @@
+.TH SHA256SUM 1 anysum
+.SH NAME
+sha256sum - compute or verify against multiple SHA-256 hashes
+
+.SH SYNOPSIS
+.B sha256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha256sum
+utility calculates and prints or checks SHA-256 (SHA-2)
+checksums.
+.PP
+The
+.B sha256sum
+utility can also check a file against multiple SHA-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha3-224sum.1 b/sha3-224sum.1
new file mode 100644
index 0000000..f1c59a2
--- /dev/null
+++ b/sha3-224sum.1
@@ -0,0 +1,209 @@
+.TH SHA3-224SUM 1 anysum
+.SH NAME
+sha3-224sum - compute or verify against multiple SHA3-224 hashes
+
+.SH SYNOPSIS
+.B sha3-224sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha3-224sum
+utility calculates and prints or checks SHA3-224
+checksums.
+.PP
+The
+.B sha3-224sum
+utility can also check a file against multiple SHA3-224
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha3-224sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha3-256sum.1 b/sha3-256sum.1
new file mode 100644
index 0000000..17c64f1
--- /dev/null
+++ b/sha3-256sum.1
@@ -0,0 +1,209 @@
+.TH SHA3-256SUM 1 anysum
+.SH NAME
+sha3-256sum - compute or verify against multiple SHA3-256 hashes
+
+.SH SYNOPSIS
+.B sha3-256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha3-256sum
+utility calculates and prints or checks SHA3-256
+checksums.
+.PP
+The
+.B sha3-256sum
+utility can also check a file against multiple SHA3-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha3-256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha3-384sum.1 b/sha3-384sum.1
new file mode 100644
index 0000000..6dadf8d
--- /dev/null
+++ b/sha3-384sum.1
@@ -0,0 +1,209 @@
+.TH SHA3-384SUM 1 anysum
+.SH NAME
+sha3-384sum - compute or verify against multiple SHA3-384 hashes
+
+.SH SYNOPSIS
+.B sha3-384sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha3-384sum
+utility calculates and prints or checks SHA3-384
+checksums.
+.PP
+The
+.B sha3-384sum
+utility can also check a file against multiple SHA3-384
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha3-384sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha3-512sum.1 b/sha3-512sum.1
new file mode 100644
index 0000000..a3faaae
--- /dev/null
+++ b/sha3-512sum.1
@@ -0,0 +1,209 @@
+.TH SHA3-512SUM 1 anysum
+.SH NAME
+sha3-512sum - compute or verify against multiple SHA3-512 hashes
+
+.SH SYNOPSIS
+.B sha3-512sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha3-512sum
+utility calculates and prints or checks SHA3-512
+checksums.
+.PP
+The
+.B sha3-512sum
+utility can also check a file against multiple SHA3-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha3-512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha384sum.1 b/sha384sum.1
new file mode 100644
index 0000000..085c22c
--- /dev/null
+++ b/sha384sum.1
@@ -0,0 +1,202 @@
+.TH SHA384SUM 1 anysum
+.SH NAME
+sha384sum - compute or verify against multiple SHA-384 hashes
+
+.SH SYNOPSIS
+.B sha384sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha384sum
+utility calculates and prints or checks SHA-384 (SHA-2)
+checksums.
+.PP
+The
+.B sha384sum
+utility can also check a file against multiple SHA-384
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha384sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha3sum.1 b/sha3sum.1
new file mode 100644
index 0000000..182d36e
--- /dev/null
+++ b/sha3sum.1
@@ -0,0 +1,218 @@
+.TH SHA3SUM 1 anysum
+.SH NAME
+sha3sum - compute or verify against multiple SHA-3 hashes
+
+.SH SYNOPSIS
+.B sha3sum
+.BR [ -a
+.IR bits ]
+.RB [ -c
+.RB [ -w ]]
+.BR [ -S
+.IR salt ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha3sum
+utility calculates and prints or checks SHA-3
+checksums.
+.PP
+The
+.B sha3sum
+utility can also check a file against multiple SHA-3
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha3sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.BR -a \ \fIbits\fP
+Version select: 224, 256, 384, or 512 for
+SHA3-224 (default), SHA3-256, SHA3-384, or
+SHA3-512, respectively.
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha512-224sum.1 b/sha512-224sum.1
new file mode 100644
index 0000000..f19a592
--- /dev/null
+++ b/sha512-224sum.1
@@ -0,0 +1,202 @@
+.TH SHA512-224SUM 1 anysum
+.SH NAME
+sha512-224sum - compute or verify against multiple SHA-512/224 hashes
+
+.SH SYNOPSIS
+.B sha512-224sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha512-224sum
+utility calculates and prints or checks SHA-512/224 (SHA-2)
+checksums.
+.PP
+The
+.B sha512-224sum
+utility can also check a file against multiple SHA-512/224
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha512-224sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha512-256sum.1 b/sha512-256sum.1
new file mode 100644
index 0000000..8ff46ca
--- /dev/null
+++ b/sha512-256sum.1
@@ -0,0 +1,202 @@
+.TH SHA512-256SUM 1 anysum
+.SH NAME
+sha512-256sum - compute or verify against multiple SHA-512/256 hashes
+
+.SH SYNOPSIS
+.B sha512-256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha512-256sum
+utility calculates and prints or checks SHA-512/256 (SHA-2)
+checksums.
+.PP
+The
+.B sha512-256sum
+utility can also check a file against multiple SHA-512/256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha512-256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/sha512sum.1 b/sha512sum.1
new file mode 100644
index 0000000..7f0fec8
--- /dev/null
+++ b/sha512sum.1
@@ -0,0 +1,202 @@
+.TH SHA512SUM 1 anysum
+.SH NAME
+sha512sum - compute or verify against multiple SHA-512 hashes
+
+.SH SYNOPSIS
+.B sha512sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B sha512sum
+utility calculates and prints or checks SHA-512 (SHA-2)
+checksums.
+.PP
+The
+.B sha512sum
+utility can also check a file against multiple SHA-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The sha512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Read in binary mode when computing hashes.
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -t
+Read in text mode when computing hashes.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode,
+so the
+.B -b
+and
+.B -t
+options are ignored, except that they undo
+.BR "-W input=hexadecimal" .
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/shake128sum.1 b/shake128sum.1
new file mode 100644
index 0000000..59f0669
--- /dev/null
+++ b/shake128sum.1
@@ -0,0 +1,214 @@
+.TH SHAKE128SUM 1 anysum
+.SH NAME
+shake128sum - compute or verify against multiple SHAKE-128 hashes
+
+.SH SYNOPSIS
+.B shake128sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B shake128sum
+utility calculates and prints or checks SHAKE-128
+checksums.
+.PP
+The
+.B shake128sum
+utility can also check a file against multiple SHAKE-128
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The shake128sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 128.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/shake256sum.1 b/shake256sum.1
new file mode 100644
index 0000000..a870510
--- /dev/null
+++ b/shake256sum.1
@@ -0,0 +1,214 @@
+.TH SHAKE256SUM 1 anysum
+.SH NAME
+shake256sum - compute or verify against multiple SHAKE-256 hashes
+
+.SH SYNOPSIS
+.B shake256sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B shake256sum
+utility calculates and prints or checks SHAKE-256
+checksums.
+.PP
+The
+.B shake256sum
+utility can also check a file against multiple SHAKE-256
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The shake256sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 256.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/shake512sum.1 b/shake512sum.1
new file mode 100644
index 0000000..0f34822
--- /dev/null
+++ b/shake512sum.1
@@ -0,0 +1,214 @@
+.TH SHAKE512SUM 1 anysum
+.SH NAME
+shake512sum - compute or verify against multiple SHAKE-512 hashes
+
+.SH SYNOPSIS
+.B shake512sum
+.RB [ -c
+.RB [ -w ]]
+.RB [ -N
+.IR length ]
+.RB [ -W
+.IR options ]\ ...
+.RB [ -z ]
+.RI [ file ]\ ...
+
+.SH DESCRIPTION
+The
+.B shake512sum
+utility calculates and prints or checks SHAKE-512
+checksums.
+.PP
+The
+.B shake512sum
+utility can also check a file against multiple SHAKE-512
+checksums, and check that the file matches at least one
+of the listed checksums.
+
+.SH OPTIONS
+The shake512sum utility conforms to the Base Definitions
+volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+The following options are supported:
+.TP
+.B -b
+Equivalent to
+.BR "-W output=binary" .
+.TP
+.B -c
+Verify the the files listed in file against the
+checksums listed on the same lines. The file
+shall be formatted as the output of the utility
+when this option is not used. See the
+.B STDOUT
+section for more information. If a file is listed
+multiple times, it need only match one of the
+checksums listed for the file.
+
+The length of the listed checksums need not match
+the length output by this utility; before the
+checksums are compared, they are truncated to the
+shorter of the two checksums.
+.TP
+.B -l
+Equivalent to
+.BR "-W output=lowercase" .
+.TP
+.BR -N \ \fIlength\fP
+The hash output size in bits. (Default is 512.)
+.TP
+.B -u
+Equivalent to
+.BR "-W output=uppercase" .
+.TP
+.B -v
+Print Keccak parameters to standard error.
+.TP
+.BR -W \ \fIoptions\fP
+Comma-sepearated list of implementation-specific
+options. The following options are supported:
+.RS
+.TP
+.BI output= format
+.I format
+shall be
+.RB \(dq lowercase \(dq
+if the checksums shall be printed in lowercase
+hexadecimal format (default),
+.RB \(dq uppercase \(dq
+for uppercase hexadecimal format, or
+.RB \(dq binary \(dq
+for binary format without anything but the
+checksum printed to standard output. This
+option is ignored if the
+.B -c
+option is used.
+.TP
+.BI input= format
+.I format
+shall be
+.RB \(dq binary \(dq
+if the files are be read in binary mode,
+.RB \(dq text \(dq
+if the files shall be read in text mode, or
+.RB \(dq hexadecimal \(dq
+they shall be decoded from hexadecimal to
+binary. If the
+.B -c
+option is used, the mode specification
+associated with a file is overrides this
+behaviour for that file if the line
+specifies hexadecimal mode.
+.TP
+.B recursive
+If a
+.I file
+operand is a directory, the checksum is computed for
+all files recursively. This option is ignored if the
+.B -c
+option is used.
+.TP
+.B no-recursive
+The utility shall traverse directories.
+(This is the default behaviour).
+.RE
+.TP
+.B -w
+Warn about, but skip, lines that are not properly
+formatted.
+.TP
+.B -x
+Equivalent to
+.BR "-W input=hexadeximal" .
+.TP
+.B -z
+Use NUL byte as line ending instead of LF.
+.PP
+There is no difference between binary mode and text mode.
+
+.SH OPERANDS
+The following operand is supported:
+.TP
+.I file
+The file to read and compute the checksum for, or if the
+.B -c
+option is used, use as the listing of files and checksums
+to verify the files against. If dash
+.RB (' - ')
+is used or if no file operand is specified, standard input
+will be used.
+
+.SH STDOUT
+If the
+.B -c
+option is not used, the utility shall print the following
+line for each calculated checksum, however there are options
+that modify the format; see the
+.B OPTIONS
+section for more information:
+.PP
+.RS
+.B \(dq%s %c%s\en\(dq,
+.RI < hash >\fB,\fP
+.RI < mode >\fB,\fP
+.RI < file >
+.RE
+.PP
+where
+.I mode
+is SP (' ') for text mode, an asterisk
+.RB (' * ')
+for binary mode, or a pound sign
+.RB (' # ')
+for hexadecimal mode; however if there is no difference
+between binary mode and text mode and either is selected,
+SP (' ') (text mode) is used.
+.PP
+If the
+.B -c
+option the output shall be on the format:
+.PP
+.RS
+.B \(dq%s: %s\en\(dq,
+.RI < file >\fB,\fP
+.RI < validity >
+.RE
+.PP
+where
+.I validity
+is an implementation specified string
+that describes whether the checksum was valid (possibly
+with remarks), the file did not exist, the file could
+not be read (possibly with error information), or if
+the checksum was invalid or could not be compared
+(possibly with remarks). The
+.B -z
+option does not modify the line ending.
+
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+0
+Successful completion.
+.TP
+1
+Checksums did not match or a file did not exist.
+.TP
+2
+An error occurred.
+
+.SH NOTES
+Other implementations do not necessarily recognise the
+hexadecimal mode specifier
+.RB (' # ')
+in checksum list files.
+.PP
+The
+.B -c
+option accepting truncated checksums is an
+implementation-specific behaviour.
+
+.SH SEE ALSO
+.BR anysum (1)
diff --git a/shiftbuffer.c b/shiftbuffer.c
deleted file mode 100644
index 6a1213e..0000000
--- a/shiftbuffer.c
+++ /dev/null
@@ -1,16 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-shiftbuffer(struct algorithm *algorithms, size_t nalgorithms, struct buffer *buffer)
-{
-	size_t i, consumed = SIZE_MAX;
-	for (i = 0; i < nalgorithms; i++)
-		consumed = MIN(consumed, algorithms[i].offset);
-	if (!consumed)
-		return;
-	for (i = 0; i < nalgorithms; i++)
-		algorithms[i].offset -= consumed;
-	memmove(&buffer->buf[0], &buffer->buf[consumed], buffer->length -= consumed);
-}
diff --git a/format_result.c b/write.c
index bb0bd29..b3eaa56 100644
--- a/format_result.c
+++ b/write.c
@@ -3,7 +3,36 @@
 
 
 void
-format_result(struct algorithm *algorithm, const char *file, enum format format)
+writeall(int fd, const void *data, size_t n, const char *fname)
+{
+	const char *text = data;
+	ssize_t r;
+	while (n) {
+		r = write(fd, text, n);
+		if (r < 0) {
+			if (errno == EINTR)
+				continue;
+			eprintf("write %s:", fname);
+		}
+		n -= (size_t)r;
+		text = &text[r];
+	}
+}
+
+
+char *
+hex(char *out, const unsigned char *in, size_t n, const char *xdigits)
+{
+	for (; n--; in++) {
+		*out++ = xdigits[(*in >> 4) & 15];
+		*out++ = xdigits[(*in >> 0) & 15];
+	}
+	return out;
+}
+
+
+void
+format_result(struct algorithm *algorithm, const char *file, enum format format, int hexinput)
 {
 	char *p;
 	size_t size = algorithm->hasher.hash_size + 1U;
@@ -34,7 +63,7 @@ format_result(struct algorithm *algorithm, const char *file, enum format format)
 		abort();
 	}
 	if (format & WITH_FILENAME)
-		p = stpcpy(stpcpy(p, "  "), file);
+		p = stpcpy(stpcpy(p, hexinput ? " #" : "  "), file);
 	if (format & WITH_NUL)
 		*p++ = '\0';
 	if (format & WITH_LF)
diff --git a/writeall.c b/writeall.c
deleted file mode 100644
index 2e3d1ad..0000000
--- a/writeall.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include "common.h"
-
-
-void
-writeall(int fd, const void *data, size_t n, const char *fname)
-{
-	const char *text = data;
-	ssize_t r;
-
-	while (n) {
-		r = write(fd, text, n);
-		if (r < 0) {
-			if (errno == EINTR)
-				continue;
-			eprintf("write %s:", fname);
-		}
-		n -= (size_t)r;
-		text = &text[r];
-	}
-}