diff options
Diffstat (limited to '')
| -rw-r--r-- | .gitignore | 41 | ||||
| -rw-r--r-- | COPYING | 16 | ||||
| -rw-r--r-- | LICENSE | 683 | ||||
| -rw-r--r-- | Makefile | 224 | ||||
| -rw-r--r-- | README | 46 | ||||
| -rw-r--r-- | adjbacklight.1 (renamed from doc/man/adjbacklight.1) | 77 | ||||
| -rw-r--r-- | adjbacklight.c | 425 | ||||
| -rw-r--r-- | arg.h | 76 | ||||
| -rw-r--r-- | config.mk | 6 | ||||
| -rw-r--r-- | dist/archlinux/stable/PKGBUILD | 26 | ||||
| -rw-r--r-- | dist/archlinux/stable/adjbacklight.install | 20 | ||||
| -rw-r--r-- | doc/info/adjbacklight.texinfo | 252 | ||||
| -rw-r--r-- | doc/info/fdl.texinfo | 505 | ||||
| -rw-r--r-- | doc/info/gpl.texinfo | 717 | ||||
| -rw-r--r-- | src/adjbacklight.auto-completion | 17 | ||||
| -rw-r--r-- | src/adjbacklight.c | 872 |
16 files changed, 596 insertions, 3407 deletions
@@ -1,41 +1,6 @@ -_/ -bin/ -obj/ -.* -!.git* *~ -\#*\# -*.swp -*.bak -*.pdf -*.ps -*.dvi -*.info -*.install -*.class -*.out +*\#* *.o -*.gch +*.out *.su - -/dist/*/*/* -!/dist/*/*/PKGBUILD -!/dist/*/*/adjbacklight.install -*.gz -*.xz - -/adjbacklight.aux -/adjbacklight.cp -/adjbacklight.cps -/adjbacklight.fn -/adjbacklight.ky -/adjbacklight.log -/adjbacklight.pg -/adjbacklight.toc -/adjbacklight.tp -/adjbacklight.vr -/adjbacklight.op -/adjbacklight.ops -/adjbacklight.pgs -/adjbacklight.vrs - +/adjbacklight diff --git a/COPYING b/COPYING deleted file mode 100644 index a711bb0..0000000 --- a/COPYING +++ /dev/null @@ -1,16 +0,0 @@ -adjbacklight – Convenient method for adjusting the backlight on your portable computer - -Copyright © 2012, 2013, 2014, 2015 Mattias Andrée (maandree@member.fsf.org) - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. @@ -1,674 +1,15 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 +ISC License - Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. +© 2012, 2013, 2014, 2015, 2017 Mattias Andrée <maandree@kth.se> - Preamble +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted, provided that the above +copyright notice and this permission notice appear in all copies. - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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It is safest -to attach them to the start of each source file to most effectively -state the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - <one line to give the program's name and a brief idea of what it does.> - Copyright (C) <year> <name of author> - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. - -Also add information on how to contact you by electronic and paper mail. - - If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - - <program> Copyright (C) <year> <name of author> - This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, your program's commands -might be different; for a GUI interface, you would use an "about box". - - You should also get your employer (if you work as a programmer) or school, -if any, to sign a "copyright disclaimer" for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -<http://www.gnu.org/licenses/>. - - The GNU General Public License does not permit incorporating your program -into proprietary programs. If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -<http://www.gnu.org/philosophy/why-not-lgpl.html>. +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. @@ -1,212 +1,32 @@ -# Copyright © 2012, 2013, 2014 Mattias Andrée (maandree@member.fsf.org) -# -# Copying and distribution of this file, with or without modification, -# are permitted in any medium without royalty provided the copyright -# notice and this notice are preserved. This file is offered as-is, -# without any warranty. -# -# [GNU All Permissive License] +.POSIX: -PREFIX = /usr -BIN = /bin -BINDIR = $(PREFIX)$(BIN) -DATA = /share -DATADIR = $(PREFIX)$(DATA) -DOCDIR = $(DATADIR)/doc -INFODIR = $(DATADIR)/info -MANDIR = $(DATADIR)/man -MAN1DIR = $(MANDIR)/man1 -LICENSEDIR = $(DATADIR)/licenses +CONFIGFILE = config.mk +include $(CONFIGFILE) +all: adjbacklight -PKGNAME = adjbacklight -COMMAND = adjbacklight +adjbacklight.o: adjbacklight.c arg.h + $(CC) -c -o adjbacklight.o adjbacklight.c $(CCFLAGS) $(CPPFLAGS) +adjbacklight: adjbacklight.o + $(CC) -o adjbacklight adjbacklight.o $(LDFLAGS) -OPTIMISATION = -Ofast -# -Os optimise for small size -# -Ofast optimise for performance -# -Og optimise for debugging -# -g include debugging data (use together with -Og or alone) +install: adjbacklight + mkdir -p -- "$(DESTDIR)$(PREFIX)/bin" + mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1" + mkdir -p -- "$(DESTDIR)$(PREFIX)/share/licenses/adjbacklight" + cp -- adjbacklight "$(DESTDIR)$(PREFIX)/bin" + cp -- adjbacklight.1 "$(DESTDIR)$(MANPREFIX)/man1" + cp -- LICENSE "$(DESTDIR)$(PREFIX)/share/licenses/adjbacklight" + chmod -- 4755 "$(DESTDIR)$(PREFIX)/bin/adjbacklight" -WARN = -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self -Wmissing-include-dirs \ - -Wtrampolines -Wfloat-equal -Wshadow -Wmissing-prototypes -Wmissing-declarations \ - -Wredundant-decls -Wnested-externs -Winline -Wno-variadic-macros -Wsync-nand \ - -Wunsafe-loop-optimizations -Wcast-align -Wstrict-overflow -Wdeclaration-after-statement \ - -Wundef -Wbad-function-cast -Wcast-qual -Wwrite-strings -Wlogical-op -Waggregate-return \ - -Wstrict-prototypes -Wold-style-definition -Wpacked -Wvector-operation-performance \ - -Wunsuffixed-float-constants -Wsuggest-attribute=const -Wsuggest-attribute=noreturn \ - -Wsuggest-attribute=pure -Wsuggest-attribute=format -Wnormalized=nfkc -Wconversion \ - -fstrict-aliasing -fstrict-overflow -fipa-pure-const -ftree-vrp -fstack-usage \ - -funsafe-loop-optimizations -# excluded: -pedantic - - - -# compile the package -.PHONY: default -default: code info shell - -.PHONY: all -all: code doc shell - -.PHONY: code -code: bin/adjbacklight - -bin/adjbacklight: src/adjbacklight.c - @mkdir -p bin - $(CC) $(OPTIMISATION) $(WARN) -std=gnu90 -o "$@" "$<" - -.PHONY: code -doc: info pdf dvi ps - -.PHONY: info -info: bin/adjbacklight.info -bin/%.info: doc/info/%.texinfo - @mkdir -p bin - $(MAKEINFO) "$<" - mv $*.info $@ - -.PHONY: pdf -pdf: bin/adjbacklight.pdf -bin/%.pdf: doc/info/%.texinfo - @! test -d obj/pdf || rm -rf obj/pdf - @mkdir -p bin obj/pdf - cd obj/pdf && texi2pdf ../../"$<" < /dev/null - mv obj/pdf/$*.pdf $@ - -.PHONY: dvi -dvi: bin/adjbacklight.dvi -bin/%.dvi: doc/info/%.texinfo - @! test -d obj/dvi || rm -rf obj/dvi - @mkdir -p bin obj/dvi - cd obj/dvi && $(TEXI2DVI) ../../"$<" < /dev/null - mv obj/dvi/$*.dvi $@ - -.PHONY: ps -ps: bin/adjbacklight.ps -bin/%.ps: doc/info/%.texinfo - @! test -d obj/ps || rm -rf obj/ps - @mkdir -p bin obj/ps - cd obj/ps && texi2pdf --ps ../../"$<" < /dev/null - mv obj/ps/$*.ps $@ - -.PHONY: shell -shell: bash fish zsh - -.PHONY: bash -bash: bin/adjbacklight.bash-completion - -.PHONY: fish -fish: bin/adjbacklight.fish-completion - -.PHONY: zsh -zsh: bin/adjbacklight.zsh-completion - -obj/adjbacklight.auto-completion: src/adjbacklight.auto-completion - @mkdir -p obj - cp "$<" "$@" - sed -i 's/^(adjbacklight$$/($(COMMAND)/' "$@" - -bin/adjbacklight.%sh-completion: obj/adjbacklight.auto-completion - @mkdir -p bin - auto-auto-complete "$*sh" --output "$@" --source "$<" - - -# install to system -.PHONY: install -install: install-base install-info install-man install-shell - -.PHONY: install-all -install-all: install-base install-doc install-shell - -.PHONY: install-base -install-base: install-cmd install-copyright - -.PHONY: install-cmd -install-cmd: bin/adjbacklight - install -d -- "$(DESTDIR)$(BINDIR)" - install -m4755 -- bin/adjbacklight "$(DESTDIR)$(BINDIR)/$(COMMAND)" - -.PHONY: install-copyright -install-copyright: install-copying install-license - -.PHONY: install-copying -install-copying: - install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - install -m644 -- COPYING "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - -.PHONY: install-license -install-license: - install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - install -m644 -- LICENSE "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - -.PHONY: install-doc -install-doc: install-info install-pdf install-dvi install-ps install-man - -.PHONY: install-info -install-info: bin/adjbacklight.info - install -dm755 -- "$(DESTDIR)$(INFODIR)" - install -m644 -- "$<" "$(DESTDIR)$(INFODIR)/$(PKGNAME).info" - -.PHONY: install-pdf -install-pdf: bin/adjbacklight.pdf - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- "$<" "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf" - -.PHONY: install-dvi -install-dvi: bin/adjbacklight.dvi - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- "$<" "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi" - -.PHONY: install-ps -install-ps: bin/adjbacklight.ps - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- "$<" "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps" - -.PHONY: install-man -install-man: doc/man/adjbacklight.1 - install -dm755 -- "$(DESTDIR)$(MAN1DIR)" - install -m644 "$<" -- "$(DESTDIR)$(MAN1DIR)/$(COMMAND).1" - -.PHONY: install-shell -install-shell: install-bash install-fish install-zsh - -.PHONY: install-bash -install-bash: bin/adjbacklight.bash-completion - install -dm755 -- "$(DESTDIR)$(DATADIR)/bash-completion/completions" - install -m644 "$<" -- "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)" - -.PHONY: install-fish -install-fish: bin/adjbacklight.fish-completion - install -dm755 -- "$(DESTDIR)$(DATADIR)/fish/completions" - install -m644 "$<" -- "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish" - -.PHONY: install-zsh -install-zsh: bin/adjbacklight.zsh-completion - install -dm755 -- "$(DESTDIR)$(DATADIR)/zsh/site-functions" - install -m644 "$<" -- "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)" - - -# remove files created by `install` -.PHONY: uninstall uninstall: - -rm -- "$(DESTDIR)$(BINDIR)/$(COMMAND)" - -rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING" - -rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE" - -rmdir -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - -rm -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps" - -rm -- "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)" - -rm -- "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish" - -rm -- "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)" - -rm -- "$(DESTDIR)$(MAN1)/$(COMMAND).1" - + -rm -- "$(DESTDIR)$(PREFIX)/bin/adjbacklight" + -rm -- "$(DESTDIR)$(MANPREFIX)/man1/adjbacklight.1" + -rm -- "$(DESTDIR)$(PREFIX)/share/licenses/adjbacklight/LICENSE" + -rmdir -- "$(DESTDIR)$(PREFIX)/share/licenses/adjbacklight" -# remove files created by `all` -.PHONY: clean clean: - -rm -r bin obj + -rm -- adjbacklight *.o +.PHONY: all install uninstall clean @@ -2,7 +2,7 @@ NAME adjbacklight - Convenient method for adjusting the backlight on your portable computer SYNOPSIS - adjbacklight (-c | -w | [-g | -s LEVEL | LEVEL] [-a | DEVICE...]) + adjbacklight [-g | -s [+|-]level[%|%%]] [-a | device ...] DESCRIPTION adjbacklight can be used to fetch or set the backlight @@ -22,36 +22,34 @@ DESCRIPTION be used non-interactively with hotkeys set up in xbindkeys(1). OPTIONS - -c - --copyright - --copying Display copyright information. + -a Run for all devices, including ACPI devices. - -w - --warranty Display warranty disclaimer. + -g Get average brightness on devices. - -a - --all Run for all devices, including ACPI devices. + -s LEVEL Set brightness on devices by actual value. - -g - --get Get average brightness on devices. + -s +LEVEL Increase brightness on devices by actual value. - -s - --set LEVEL[%] Set brightness on devices. + -s -LEVEL Decrease brightness on devices by actual value. - +LEVEL Increase brightness on devices by actual value. - -LEVEL Decrease brightness on devices by actual value. - =LEVEL Set brightness on devices by actual value. + -s LEVEL% Set brightness on devices by percentage-points. - +LEVEL% Increase brightness on devices by percentage-points. - -LEVEL% Decrease brightness on devices by percentage-points. - =LEVEL% Set brightness on devices by percentage-points. + -s +LEVEL% Increase brightness on devices by percentage-points. - +LEVEL%% Increase brightness on devices by percentage. - -LEVEL%% Decrease brightness on devices by percentage. - =LEVEL%% Set brightness on devices by percentage. + -s -LEVEL% Decrease brightness on devices by percentage-points. -SEE ALSO - xbindkeys(1), xbacklight(1), sys_class_backlight(4) + -s LEVEL%% Set brightness on devices by percentage. + + -s +LEVEL%% Increase brightness on devices by percentage. + + -s -LEVEL%% Decrease brightness on devices by percentage. - Full documentation available locally via: info '(adjbacklight)' +KEYBOARD + left, down Darken the screen. + right, up Brighten the screen. + + q, enter, C-d Continue to next controller, or if at last, quit. + +SEE ALSO + xbindkeys(1), xbacklight(1) diff --git a/doc/man/adjbacklight.1 b/adjbacklight.1 index 81db62d..3596e5d 100644 --- a/doc/man/adjbacklight.1 +++ b/adjbacklight.1 @@ -3,22 +3,20 @@ adjbacklight - Convenient method for adjusting the backlight on your portable computer .SH SYNOPSIS .B adjbacklight -(-c | -w | [-g | -s -.IR LEVEL -| -.IR LEVEL ] +[-g | -s +.RB [ + | - ]\fIlevel\fP[ % | %% ]] [-a | -.IR DEVICE ...]) +.IR device \ ...] .SH DESCRIPTION .B adjbacklight can be used to fetch or set the backlight non-interactively. If these feature is not used, it starts a interactive user interface in the terminal. -.PP +.P .B adjbacklight installs with the set-uid bit set, to enable any user to change the backlight on the computer. -.PP +.P .B adjbacklight was originally designed for small netbooks that are not running .BR X . @@ -39,66 +37,51 @@ non-interactively with hotkeys set up in .BR xbindkeys (1). .SH OPTIONS .TP -.BR \-c ,\ \-\-copyright ,\ \-\-copying -Display copyright information. -.TP -.BR \-w, \ \-\-warranty -Display warranty disclaimer. -.TP -.BR \-a, \ \-\-all +.BR \-a Run for all devices, including ACPI devices. .TP -.BR \-g, \ \-\-get +.BR \-g Get average brightness on devices. .TP -.BR \-s, \ \-\-set \ \fILEVEL\fP[%] -Set brightness on devices. -.PP +.BR -s \ \fIlevel\fP +Set brightness on devices by actual value. .TP -.BR \+ \fILEVEL\fP +.BR -s\ + \fIlevel\fP Increase brightness on devices by actual value. .TP -.BR \- \fILEVEL\fP +.BR -s\ - \fIlevel\fP Decrease brightness on devices by actual value. .TP -.BR \= \fILEVEL\fP -Set brightness on devices by actual value. -.br +.BR -s \ \fIlevel\fP% +Set brightness on devices by percentage-points. .TP -.BR \+ \fILEVEL\fP% +.BR -s\ + \fIlevel\fP% Increase brightness on devices by percentage-points. .TP -.BR \- \fILEVEL\fP% +.BR -s\ - \fIlevel\fP% Decrease brightness on devices by percentage-points. .TP -.BR \= \fILEVEL\fP% -Set brightness on devices by percentage-points. -.br +.BR -s \ \fIlevel\fP%% +Set brightness on devices by percentage. .TP -.BR \+ \fILEVEL\fP%% +.BR -s\ + \fIlevel\fP%% Increase brightness on devices by percentage. .TP -.BR \- \fILEVEL\fP%% +.BR -s\ - \fIlevel\fP%% Decrease brightness on devices by percentage. +.SH KEYBOARD .TP -.BR \= \fILEVEL\fP%% -Set brightness on devices by percentage. +.BR left ,\ down +Darken the screen. +.TP +.BR right ,\ up +Brighten the screen. +.TP +.BR q ,\ enter ,\ C-d +Continue to next controller, or if at last, quit. .SH "SEE ALSO" .BR xbindkeys (1), .BR xbacklight (1) -.PP -Full documentation available locally via: info \(aq(adjbacklight)\(aq .SH AUTHORS -Principal author, Mattias Andrée. See the COPYING file for the full -list of authors. -.SH LICENSE -Copyright \(co 2012, 2013, 2014, 2015 Mattias Andrée -.br -License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. -.br -This is free software: you are free to change and redistribute it. -.br -There is NO WARRANTY, to the extent permitted by law. -.SH BUGS -Please report bugs to https://github.com/maandree/adjbacklight/issues or to -maandree@member.fsf.org +Mattias Andrée +.RI < maandree@kth.se > diff --git a/adjbacklight.c b/adjbacklight.c new file mode 100644 index 0000000..9fe68c1 --- /dev/null +++ b/adjbacklight.c @@ -0,0 +1,425 @@ +/* See LICENSE file for copyright and license details. */ +#include <sys/ioctl.h> +#include <sys/wait.h> +#include <alloca.h> +#include <ctype.h> +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <grp.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <termios.h> +#include <unistd.h> + +#include "arg.h" + + +#ifndef BACKLIGHT_DIR +# define BACKLIGHT_DIR "/sys/class/backlight" +#endif + + + +char *argv0; +static double brightness = 0; +static int nbrightness = 0; +static int cols = 80; +static char *space; +static char *line; + + + +static void +usage(void) +{ + fprintf(stderr, "usage: %s [-g | -s [+|-]level[%%|%%%%]] [-a | device ...]\n", argv0); + exit(1); +} + + +static long int +readfile(const char *path) +{ + int fd; + char buf[64]; + ssize_t i, n; + long int value = 0; + + fd = open(path, O_RDONLY); + if (fd < 0) + return -1; + + while ((n = read(fd, buf, sizeof(buf))) > 0) { + for (i = 0; i < n; i++) { + if (isdigit(buf[i])) + value = value * 10 + (buf[i] - '0'); + else if (buf[i] != '\n') + goto out; + } + } + +out: + close(fd); + return n ? -1 : value; +} + + +static double +getbrightness(const char *device, long int *out_cur, long int *out_max) +{ + size_t n = sizeof("//max_brightness") - 1; + char *path; + long int max, cur; + + n += strlen(BACKLIGHT_DIR); + n += strlen(device); + path = alloca(n + 1); + + if (sprintf(path, "%s/%s/max_brightness", BACKLIGHT_DIR, device) != (int)n) + abort(); + max = readfile(path); + if (max < 1) + return -1; + if (out_max) + *out_max = max; + + if (sprintf(path, "%s/%s/brightness", BACKLIGHT_DIR, device) != (int)n - 4) + abort(); + cur = readfile(path); + if (cur < 0) + return -1; + if (out_cur) + *out_cur = cur; + + return (double)cur / (double)max; +} + + +static int +setbrightness(const char *device, long int value) +{ + size_t p = 0, n = sizeof("//brightness") - 1; + char *path, buf[128]; + ssize_t r = 0; + int fd; + + n += strlen(BACKLIGHT_DIR); + n += strlen(device); + path = alloca(n + 1); + + if (sprintf(path, "%s/%s/brightness", BACKLIGHT_DIR, device) != (int)n) + abort(); + if (sprintf(buf, "%li\n", value) < 0) + abort(); + + fd = open(path, O_WRONLY); + if (fd < 0) + return -1; + + for (n = strlen(buf); p < n; p += (size_t)r) + if ((r = write(fd, &buf[p], n - p)) < 0) + break; + + close(fd); + return r < 0 ? -1 : 0; +} + + +static int +adjbrightness(const char *device, double pcur, long int cur, long int max, double adj, int inc, const char *suf) +{ + switch (strlen(suf)) { + case 2: + pcur = adj * pcur / 100 + pcur * inc; + cur = (long int)(pcur * (double)max + 0.5); + break; + case 1: + pcur = adj / 100 + pcur * inc; + cur = (long int)(pcur * (double)max + 0.5); + break; + case 0: + cur = (long int)adj + cur * inc; + break; + default: + abort(); + } + + cur = cur < 0 ? 0 : cur < max ? cur : max; + return setbrightness(device, cur); +} + + +static void +bars(long int max, long int init, long int cur) +{ + long int mid = (long int)((double)cur * (double)(cols - 2) / (double)max + 0.5); + + printf("\033[%iD\033[6A", cols); + printf("\033[2K┌%s┐\n", line); + space[mid] = '\0'; + printf("\033[2K│\033[47m%s\033[49m%s│\n", space, &space[mid + 1]); + space[mid] = ' '; + printf("\033[2K└%s┘\n", line); + printf("\033[2KMaximum brightness: %li\n", max); + printf("\033[2KInitial brightness: %li\n", init); + printf("\033[2KCurrent brightness: %li\n", cur); + + fflush(stdout); +} + + +static void +interactive(const char *device, long int cur, long int max) +{ + long int step, init; + int c; + + step = max / 200; + step = step ? step : 1; + init = cur; + + printf("\n\n\n\n\n\n"); + bars(max, init, cur); + while ((c = getchar()) != -1) { + switch (c) { + case 'q': + case '\n': + case 4: + printf("\n"); + return; + case 'A': + case 'C': + cur += step << 1; + /* fall through */ + case 'B': + case 'D': + cur -= step; + cur = cur < 0 ? 0 : cur < max ? cur : max; + adjbrightness(device, 0, 0, max, (double)cur, 0, ""); + bars(max, init, cur); + } + } +} + + +static void +handle_device(const char *device, int get, int set, double adj, int inc, const char *suf) +{ + double value; + long int cur, max; + + value = getbrightness(device, &cur, &max); + + if (get) { + if (value >= 0) { + brightness += value; + nbrightness++; + } + } else if (set) { + adjbrightness(device, value, cur, max, adj, inc, suf); + } else { + interactive(device, cur, max); + } +} + + +int +main(int argc, char *argv[]) +{ + int all = 0; + int get = 0; + char* set = NULL; + char set_prefix = '='; + double set_value = 0; + char* set_suffix = NULL; + struct winsize win; + struct termios saved_stty; + struct termios stty; + pid_t pid = -1; + DIR *dir; + struct dirent *ent; + int any = 0; + + ARGBEGIN { + case 'a': + all = 1; + break; + case 'g': + get = 1; + break; + case 's': + set = EARGF(usage()); + break; + default: + usage(); + } ARGEND; + + if ((get && set) || (argc && all)) + usage(); + + /* Parse -s argument */ + if (set) { + if (*set == '+' || *set == '-') { + set_prefix = *set; + set++; + } + if (!isdigit(*set) && *set != '.') + usage(); + errno = 0; + set_value = strtod(set, &set_suffix); + if (errno || set_value < 0) { + fprintf(stderr, "%s: strtod %s: %s\n", argv0, set, strerror(errno)); + return 1; + } + if (*set_suffix && strcmp(set_suffix, "%") && strcmp(set_suffix, "%%")) + usage(); + if (set_prefix == '-') { + set_value = -set_value; + set_prefix = '+'; + } + } + + /* Check permissions (important because the program is installed with set-uid) */ + if (getuid()) { + struct group *videogrp = getgrnam("video"); + if (!videogrp && errno && errno != ENOENT && errno != ESRCH && errno != EPERM) { + /* Note, glibc sets errno to EIO if the group does not exist, + * this is the not the specified behavour by either POSIX or + * glibc, and it would be a security issue to treat it as OK. + * Additionally, EBADF is not treated as OK. */ + fprintf(stderr, "%s: getgrnam video: %s\n", argv0, strerror(errno)); + return 1; + } else if (videogrp) { + long ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1; + gid_t *groups; + int ngroups; + if (ngroups_max < 0 || ngroups_max > INT_MAX - 1) { + fprintf(stderr, "%s: sysconf _SC_NGROUPS_MAX: %s\n", argv0, strerror(errno)); + return 1; + } + groups = alloca((size_t)ngroups_max * sizeof(*groups)); + ngroups = getgroups((int)ngroups_max, groups); + if (ngroups < 0) { + fprintf(stderr, "%s: getgroups: %s\n", argv0, strerror(errno)); + return 1; + } + while (ngroups--) + if (groups[ngroups] == videogrp->gr_gid) + break; + if (ngroups < 0) { + fprintf(stderr, "%s: only root and members of the group 'video' may run this command\n", argv0); + return 1; + } + } + } + + if (!get && !set) { + int i; + printf("\n\n"); + printf("If the program is abnormally aborted the may be some residual\n"); + printf("effects on the terminal. the following commands should reset it:\n"); + printf("\n"); + printf(" stty sane\n"); + printf(" printf '\\ec'\n"); + printf("\n"); + printf("\n\n\n\n"); + + /* Get the size of the terminal */ + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1) + fprintf(stderr, "%s: ioctl <stdout> TIOCGWINSZ: %s\n", argv0, strerror(errno)); + else + cols = win.ws_col; + + line = malloc((size_t)cols * 3); + space = malloc((size_t)cols); + if (!line || !space) { + fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(ENOMEM)); + return 1; + } + for (i = 0; i < cols; i++) { + line[i * 3 + 0] = (char)(0xE2); + line[i * 3 + 1] = (char)(0x94); + line[i * 3 + 2] = (char)(0x80); + } + memset(space, ' ', (size_t)cols); + space[cols - 1] = '\0'; + line[(cols - 2) * 3] = '\0'; + + /* stty -icanon -echo */ + if (tcgetattr(STDIN_FILENO, &stty)) { + fprintf(stderr, "%s: tcgetattr <stdin>: %s\n", argv0, strerror(errno)); + return 1; + } + saved_stty = stty; + stty.c_lflag &= (tcflag_t)~(ICANON | ECHO); + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty)) { + fprintf(stderr, "%s: tcsetattr <stdin>: %s\n", argv0, strerror(errno)); + return 1; + } + + /* Hide cursor */ + printf("%s", "\033[?25l"); + fflush(stdout); + + /* Fork to diminish risk of unclean exit */ + pid = fork(); + if (pid == (pid_t)-1) { + fprintf(stderr, "%s: fork: %s\n", argv0, strerror(errno)); + } else if (pid) { + waitpid(pid, NULL, 0); + goto done; + } + } + + if (argc) { + for (; *argv; argv++) { + if (strchr(*argv, '/')) + *argv = strrchr(*argv, '/'); + handle_device(*argv, get, !!set, set_value, set_prefix == '+', set_suffix); + } + } else { + if ((dir = opendir(BACKLIGHT_DIR))) { + while ((ent = readdir(dir))) { + if (all || strstr(ent->d_name, "acpi_video") == ent->d_name) { + if (*ent->d_name && *ent->d_name != '.') { + handle_device(ent->d_name, get, !!set, set_value, set_prefix == '+', set_suffix); + any = 1; + } + } + } + closedir(dir); + } + if (!any) + fprintf(stderr, "%s: cannot find any backlight devices\n", argv0); + } + + if (get) { + if (nbrightness) { + brightness *= 100; + brightness /= (double)nbrightness; + printf("%.2lf%%\n", brightness); + fflush(stdout); + } else { + printf("%s\n", "100.00%"); + fflush(stdout); + } + } + +done: + if (!get && !set && pid) { + /* Show cursor */ + printf("%s", "\033[?25h"); + fflush(stdout); + + /* `stty icanon echo` */ + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty)) { + fprintf(stderr, "%s: tcsetattr <stdin>: %s\n", argv0, strerror(errno)); + return 1; + } + } + + return 0; +} @@ -0,0 +1,76 @@ +/* + * Copy me if you can. + * by 20h + */ + +#ifndef ARG_H__ +#define ARG_H__ + +extern char *argv0; + +/* use main(int argc, char *argv[]) */ +#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\ + argv[0] && argv[0][1];\ + argc--, argv++) {\ + char argc_;\ + char **argv_;\ + int brk_;\ + if (argv[0][0] == '-') {\ + if (argv[0][1] == '-' && argv[0][2] == '\0') {\ + argv++;\ + argc--;\ + break;\ + }\ + for (brk_ = 0, argv[0]++, argv_ = argv;\ + argv[0][0] && !brk_;\ + argv[0]++) {\ + if (argv_ != argv)\ + break;\ + argc_ = argv[0][0];\ + switch (argc_) + +/* Handles obsolete -NUM syntax */ +#define ARGNUM case '0':\ + case '1':\ + case '2':\ + case '3':\ + case '4':\ + case '5':\ + case '6':\ + case '7':\ + case '8':\ + case '9' + +#define ARGALT(SYMBOL) }\ + } else if (argv[0][0] == SYMBOL) {\ + for (brk_ = 0, argv[0]++, argv_ = argv;\ + argv[0][0] && !brk_;\ + argv[0]++) {\ + if (argv_ != argv)\ + break;\ + argc_ = argv[0][0];\ + switch (argc_) + +#define ARGEND }\ + } else {\ + break;\ + }\ + } + +#define ARGC() argc_ + +#define ARGNUMF() (brk_ = 1, estrtonum(argv[0], 0, INT_MAX)) + +#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\ + ((x), abort(), (char *)0) :\ + (brk_ = 1, (argv[0][1] != '\0')?\ + (&argv[0][1]) :\ + (argc--, argv++, argv[0]))) + +#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\ + (char *)0 :\ + (brk_ = 1, (argv[0][1] != '\0')?\ + (&argv[0][1]) :\ + (argc--, argv++, argv[0]))) + +#endif diff --git a/config.mk b/config.mk new file mode 100644 index 0000000..6f50bbb --- /dev/null +++ b/config.mk @@ -0,0 +1,6 @@ +PREFIX = /usr/local +MANPREFIX = $(PREFIX)/share/man + +CCFLAGS = -std=c99 -Wall -Wextra -O2 +CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 +LDFLAGS = -s diff --git a/dist/archlinux/stable/PKGBUILD b/dist/archlinux/stable/PKGBUILD deleted file mode 100644 index db8faf1..0000000 --- a/dist/archlinux/stable/PKGBUILD +++ /dev/null @@ -1,26 +0,0 @@ -# Maintainer: Mattias Andrée <`base64 -d`(bWFhbmRyZWUK)@member.fsf.org> - -pkgname=adjbacklight -pkgver=7.3.2 -pkgrel=1 -pkgdesc="Convenient method for adjusting the backlight on your portable computer" -arch=('x86_64' 'i686') -url="https://github.com/maandree/adjbacklight" -license=('GPL3') -depends=('linux') -makedepends=('texinfo' 'auto-auto-complete') -install=adjbacklight.install -source=(https://github.com/maandree/adjbacklight/archive/${pkgver}.tar.gz) -sha256sums=(75b7760a2cda157b0a27d3d4290c73e6b4219d9b08a3b6f466e8486aa6be7d0a) - - -build() { - cd "${srcdir}/adjbacklight-${pkgver}" - make DESTDIR="${pkgdir}/" -} - -package() { - cd "${srcdir}/adjbacklight-${pkgver}" - make DESTDIR="${pkgdir}/" install -} - diff --git a/dist/archlinux/stable/adjbacklight.install b/dist/archlinux/stable/adjbacklight.install deleted file mode 100644 index ab4d945..0000000 --- a/dist/archlinux/stable/adjbacklight.install +++ /dev/null @@ -1,20 +0,0 @@ -_file="adjbacklight" - -infodir="usr/share/info" -file="${_file}.info" - - -post_install() { - [[ -x "usr/bin/install-info" ]] || return 0 - install-info -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null -} - -post_upgrade() { - post_install "$1" -} - -pre_remove() { - [[ -x "usr/bin/install-info" ]] || return 0 - install-info --delete -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null -} - diff --git a/doc/info/adjbacklight.texinfo b/doc/info/adjbacklight.texinfo deleted file mode 100644 index bf1da87..0000000 --- a/doc/info/adjbacklight.texinfo +++ /dev/null @@ -1,252 +0,0 @@ -\input texinfo @c -*-texinfo-*- - -@c %**start of header -@setfilename adjbacklight.info -@settitle adjbacklight -@afourpaper -@documentencoding UTF-8 -@documentlanguage en -@finalout -@c %**end of header - - -@dircategory Miscellaneous -@direntry -* adjbacklight: (adjbacklight). Convenient method for adjusting the backlight on your portable computer -@end direntry - - - -@c @defindex op -@c @synindex op vr -@c @synindex cp pg - - -@copying -This manual is for @command{adjbacklight}. - -Copyright @copyright{} 2013, 2014 Mattias Andrée (maandree@@member.fsf.org) - -@quotation -Permission is granted to copy, distribute and/or modify this document -under the terms of the GNU Free Documentation License, Version 1.3 or -any later version published by the Free Software Foundation; with no -Invariant Sections, with no Front-Cover Texts, and with no Back-Cover -Texts. A copy of the license is included in the section entitled -``GNU Free Documentation License''. -@end quotation -@end copying - - -@ifnottex -@node Top -@top adjbacklight -@insertcopying -@end ifnottex - -@titlepage -@title adjbacklight 7.1 -@subtitle Convenient method for adjusting the backlight on your portable computer. -@author Mattias Andrée, maandree@@member.fsf.org -@page -@vskip 0pt plus 1filll -@insertcopying -@page -@*@* -@center `And sometimes the portable computers' adjustment keys arn't even wired to the hardware…' -@end titlepage - -@contents - - -@menu -* Overview:: Overview of @command{adjbacklight} -* Invoking:: How to start @command{adjbacklight} -* Using:: How to use @command{adjbacklight} -* Behind the scenes:: How @command{adjbacklight} works -* License of adjbacklight:: Summary of the license of the program -* GNU General Public License:: The license of the program -* GNU Free Documentation License:: The license of this manual -* Concept index:: Concept index -@end menu - - - -@node Overview -@chapter Overview -@cindex overview -@cindex description - -@command{adjbacklight} is convient method for adjusting the backlight on your -portable computer. Depending on your computer, the details of @command{adjbacklight} -differs. - -For some computers program will adjust the same parameters as the keys on your -keyboard, one other computers this program will adjust an independent parameter -allowing more detailed adjustment and may not be affected by the battery status -change. One some computers the keys for the suns does not do anything and is -expected to be binded by the OS, for thoses computers this may be the best choice -if you are in the TTY. - -@command{adjbacklight} allows 0.5 % precision, assuming that the firmware allows -at least that. If you want higher precision, it is simple to modify the source -code. Just run @code{sed -i s/200/400/g src/adjbacklight.c}, if you want -0.25 % precision. - -@cindex root -@cindex video -@cindex permissions -To use @command{adjbacklight} you must either be root or be a member of the -group `video'. The `video' membership requirement is artificial so you can rip -that out from the code if you prefer, but the effective user must be `root' -(EUID = 0) otherwise you will not have permission to use files in -@file{/sys/class/backlight} unless you make your initialisation -system give you access. - - - -@node Invoking -@chapter Invoking -@cindex invoking -@cindex starting -@cindex options -@cindex arguments -@cindex device -@cindex selecting device -@cindex interactive mode -@cindex non-interactive mode -@cindex @command{adjbacklight} -@cindex @option{-c} -@cindex @option{--copying} -@cindex @option{--copyright} -@cindex @option{-w} -@cindex @option{--warranty} -@cindex @option{-a} -@cindex @option{--all} -@cindex @option{-g} -@cindex @option{--get} -@cindex @option{-s} -@cindex @option{--set} - -@command{adjbacklight} can be started with @option{-c}, @option{--copying} or -@option{--copyright} for displaying copyright information, @option{-w} or -@option{--warranty} for displaying a warranty disclaimer. - -To actually use the program, just execute @command{adjbacklight} without any -arguments, or with @option{-a} or @option{--all} to not limit the devices to -those that are not ACPI video devices. Alternatively you can list the devices -either by full path or just the name in the directory @file{/sys/class/backlight}. - -If you do not want to run in interactive mode, you can use the option -@option{-g} or @option{--get} to get the average backlight of all devices -selected by the arguments (as in interactive mode), the value will be -printed percents with no whitespace between the value and the percent, -the value will be formated in the traditional computer format, only 0-9 -with one dot (.) for separation of the integer part and the decimal part -(which will be two digits.) If you want to set the backlight there are -a few ways to do this: @option{-s} or @option{--set} followed by a value -or the value directly but with a prepending `=' if it does not start with -`+' or `-'. This argument is formated similar to the value printed by -@option{--get}, except it may end with zero, one, or two percent signed. -`+' is used for increase in brightness, `-' for decrease. Zero percent -signed is used for a raw value, one percent signed is used for a cooked -value that is usable on all backlight devices, and two percent signed -is used for a value relative to the current value. - -Assume the current backlight is 50 (25 %) on a device and the maximum is -200. @code{+25} will set it to 75 (37,5 %) and @code{-25} will set it to -25 (12,5 %). @code{+50%} will set it to 75 % (150), @code{-50%} would -set it to -25 % (-50) but because that is not within the accepted value -range it will be truncated to 0. @code{+100%%} will set it to 100 (50 %), -that it 200 % of the current brightness, @code{-50%%} will set it to -25 (12,5 %), that is 50 % of the current brightness. For the following -formats the `=' is optional if @option{-s} or @option{--set} is used. -@code{=150} will set the brightness to 150 (75 %), @code{=50%} will set -it to 50 % (100), and @code{=200%%} will set it to 100 (50 %), that is -200 % of the current brightness. - - - -@node Using -@chapter Using -@cindex interactive mode -@cindex usage -@cindex keyboard -@cindex darken screen -@cindex brighten screen -@cindex quit -@cindex exit -@cindex close -@cindex next screen - -When you run @command{adjbacklight} in interactive mode, the following -keys are used to adjust the backlighting: - -The @kbd{left} and @kbd{down} arrow keys are used to darken the screen. -The @kbd{right} and @kbd{up} arrow keys are used to brighten the screen. -@kbd{q}, @kbd{enter} and @kbd{<control>d} continues to the next backlight -controller, or if you are at the last one, exits the program. - - - -@node Behind the scenes -@chapter Behind the scenes -@cindex behind the scenes -@cindex inner workings - -On normally configured Linux systems, the kernel mounts a virtual -partition on @file{/sys}. If you have screens using backlight, -you should find backlight device in @file{/sys/class/backlight}. -These devices are directories containing control files which you -can read the current values from or write to (perhaps using @command{echo}) -to modify the value. In a directory in @file{/sys/class/backlight} -you will find @file{brightness} and @file{max_brightness}. -Just read from @file{max_brightness} to get the maximum allowed integer -value in @file{brightness}, the minimum value is 0. - - - -@node License of adjbacklight -@appendix License of adjbacklight -@flushleft -adjbacklight – Convient method for adjusting the backlight on your portable computer - -Copyright © 2012, 2013, 2014 Mattias Andrée (maandree@@member.fsf.org) - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. -@end flushleft - -@node GNU General Public License -@appendix GNU General Public License -@include gpl.texinfo - -@node GNU Free Documentation License -@appendix GNU Free Documentation License -@include fdl.texinfo - -@node Concept index -@appendix Concept index -@printindex cp - -@c @node Concept and program index -@c @appendix Concept and program index -@c @printindex pg - -@c @node Variable and option index -@c @appendix Variable and option index -@c @printindex vr - - -@bye - diff --git a/doc/info/fdl.texinfo b/doc/info/fdl.texinfo deleted file mode 100644 index cb71f05..0000000 --- a/doc/info/fdl.texinfo +++ /dev/null @@ -1,505 +0,0 @@ -@c The GNU Free Documentation License. -@center Version 1.3, 3 November 2008 - -@c This file is intended to be included within another document, -@c hence no sectioning command or @node. - -@display -Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. -@uref{http://fsf.org/} - -Everyone is permitted to copy and distribute verbatim copies -of this license document, but changing it is not allowed. -@end display - -@enumerate 0 -@item -PREAMBLE - -The purpose of this License is to make a manual, textbook, or other -functional and useful document @dfn{free} in the sense of freedom: to -assure everyone the effective freedom to copy and redistribute it, -with or without modifying it, either commercially or noncommercially. -Secondarily, this License preserves for the author and publisher a way -to get credit for their work, while not being considered responsible -for modifications made by others. - -This License is a kind of ``copyleft'', which means that derivative -works of the document must themselves be free in the same sense. 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Of course, your -program's commands might be different; for a GUI interface, you would -use an ``about box''. - -You should also get your employer (if you work as a programmer) or school, -if any, to sign a ``copyright disclaimer'' for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -@url{http://www.gnu.org/licenses/}. - -The GNU General Public License does not permit incorporating your -program into proprietary programs. If your program is a subroutine -library, you may consider it more useful to permit linking proprietary -applications with the library. If this is what you want to do, use -the GNU Lesser General Public License instead of this License. But -first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}. diff --git a/src/adjbacklight.auto-completion b/src/adjbacklight.auto-completion deleted file mode 100644 index a06884f..0000000 --- a/src/adjbacklight.auto-completion +++ /dev/null @@ -1,17 +0,0 @@ -(adjbacklight - (unargumented (options -c --copyright --copying) (complete --copying) - (desc 'Display copyright information')) - - (unargumented (options -w --warranty) (complete --warranty) - (desc 'Display warranty disclaimer')) - - (unargumented (options -a --all) (complete --all) - (desc 'Run for all devices, including ACPI devices')) - - (unargumented (options -g --get) (complete --get) - (desc 'Get average brightness on devices')) - - (argumented (options -s --set) (complete --set) (files 'LEVEL[%]') (files -0) - (desc 'Set brightness on devices')) -) - diff --git a/src/adjbacklight.c b/src/adjbacklight.c deleted file mode 100644 index 455fb70..0000000 --- a/src/adjbacklight.c +++ /dev/null @@ -1,872 +0,0 @@ -/** - * adjbacklight – Convenient method for adjusting the backlight on your portable computer - * - * Copyright © 2012, 2013, 2014, 2015 Mattias Andrée (maandree@member.fsf.org) - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#include <stdlib.h> -#include <stdio.h> -#include <termios.h> -#include <sys/ioctl.h> -#include <sys/wait.h> -#include <sys/types.h> -#include <unistd.h> -#include <dirent.h> -#include <string.h> -#include <limits.h> -#include <alloca.h> -#include <grp.h> -#include <pwd.h> - - - -#ifndef PATH_MAX -#warning PATH_MAX is not defined -#define PATH_MAX 4096 -#endif - - - -/** - * The years this software has been developed - */ -#define _YEARS_ "2012, 2013, 2014" - - -/** - * Forking method - */ -#ifndef FORK -#define FORK fork -#endif - - -/** - * The directory where the backlight devices are found and configured - */ -#ifndef BACKLIGHT_DIR -#define BACKLIGHT_DIR "/sys/class/backlight" -#endif - - -/** - * Print a line to stdout - * - * @param S:const char* The string to print - */ -#define P(S) printf("%s", S "\n") - - -/** - * Cut a string of at the first line break - * A help `int` named `i` must be available - * - * @param data:char* The string, it will be modified - * @return :char* The input string, it has been modified - */ -#define unnl(data) \ - ({ \ - for (i = 0; *(data + i); i++) \ - if (*(data + i) == '\n') \ - *(data + i) = 0; \ - data; \ - }) - - - -/** - * Test whether a string numerical and with at most two trailing '%' - * - * @param str The string - * @return Whether the test passed - */ -static int isnumerical(const char* str); - -/** - * Interactively adjust the backlight on a device - * - * @param cols The number of columns on the terminal - * @param device The device on which to adjust backlight - */ -static void adjust(int cols, const char* device); - -/** - * Gets the current backlight setting on a device - * - * @param device The device from which to get backlight - * @return The brightness as a [0; 1] float, negative on error - */ -static float getbrightness(const char* device); - -/** - * Sets the current backlight setting on a device - * - * @param device The device from which to get backlight - * @param adjustment The adjustment to make - */ -static void setbrightness(const char* device, const char* adjustment); - -/** - * Read a file - * - * @param output Buffer to store the file's content in - * @param file The file to read - * @return Zero on success, non-zero on failure - */ -static int readfile(char* output, const char* file); - -/** - * Write an integer to a file - * - * @param buffer Buffer for temporary data - * @param integer The integer to write - * @param file The file to which to write - * @return Zero on success, non-zero on failure - */ -static int writefile(char* buffer, int integer, const char* file); - -/** - * Print the status - * - * @param min The minimum possible brightness - * @param max The maximum possible brightness - * @param init The brightness used when the program started - * @param cur The current brightness - * @param cols The number of columns on the terminal - */ -static void bars(int min, int max, int init, int cur, int cols); - - - -/** - * A series of spaces used to print the bar - */ -static char* space; - -/** - * A series of vertical lines used to print the bar - */ -static char* line; - - - -/** - * This is the mane entry point of the program - * - * @param argc The number of elements in `argv` - * @parma argv Command line arguments, including the command - * @return Exit value, zero on success - */ -int main(int argc, char** argv) -{ - struct winsize win; - struct termios saved_stty; - struct termios stty; - size_t i, ndevices = 0; - pid_t pid = 0; - char* set = NULL; - int j, get = 0, help = 0, all = 0, cols = 80; - char** devices = alloca((size_t)argc * sizeof(char*)); - - - if (argc > 1) - { - char* arg; - for (i = 1; i < (size_t)argc; i++) - { - #define T(S) (!strcmp(arg, S)) - arg = *(argv + i); - if (T("-h") || T("--help")) - help = 1; - else if (T("-a") || T("--all")) - all = 1; - else if (T("-c") || T("--copyright") || T("--copying")) - { - P("\n"); - P("adjbacklight – Convenient method for adjusting the backlight on your portable computer"); - P(""); - P("Copyright © " _YEARS_ " Mattias Andrée (maandree@member.fsf.org)"); - P(""); - P("This program is free software: you can redistribute it and/or modify"); - P("it under the terms of the GNU General Public License as published by"); - P("the Free Software Foundation, either version 3 of the License, or"); - P("(at your option) any later version."); - P(""); - P("This program is distributed in the hope that it will be useful,"); - P("but WITHOUT ANY WARRANTY; without even the implied warranty of"); - P("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"); - P("GNU General Public License for more details."); - P(""); - P("You should have received a copy of the GNU General Public License"); - P("along with this program. If not, see <http://www.gnu.org/licenses/>."); - P("\n"); - return 0; - } - else if (T("-w") || T("--warranty")) - { - P("\n"); - P("This program is distributed in the hope that it will be useful,"); - P("but WITHOUT ANY WARRANTY; without even the implied warranty of"); - P("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"); - P("GNU General Public License for more details."); - P("\n"); - return 0; - } - else if (T("-s") || T("--set")) - { - char* tmp; - if (i + 1 == (size_t)argc) - fprintf(stderr, "%s: argument for option %s is missing, ignoring option\n", *argv, arg); - else - if (!isnumerical(tmp = *(argv + ++i))) - fprintf(stderr, "%s: argument for option %s is malformated, ignoring option\n", *argv, arg); - else - { - set = tmp; - get = 0; - } - } - else if (T("-g") || T("--get")) - { - get = 1; - set = NULL; - } - else if (((*arg == '-') || (*arg == '+') || (*arg == '=')) && isnumerical(arg + 1)) - { - set = arg; - get = 0; - } - else - { - if (*arg && (*arg != '-')) - *(devices + ndevices++) = arg; - else - fprintf(stderr, "%s: ignoring unrecognised argument: %s\n", *argv, arg); - } - #undef T - } - fflush(stderr); - if (help || (((size_t)all + ndevices + (size_t)get == 0) && !set)) - { - P("\n"); - P("adjbacklight - Convenient method for adjusting the backlight on your portable computer"); - P(""); - P("USAGE: adjbacklight (-c | -w | [-g | -s LEVEL | LEVEL] [-a | DEVICE...])"); - P(""); - P("Run with options to adjust the backlight on your monitors."); - P(""); - P(""); - P("OPTIONS:"); - P(""); - P("-c"); - P("--copyright"); - P("--copying Display copyright information"); - P(""); - P("-w"); - P("--warranty Display warranty disclaimer"); - P(""); - P("-a"); - P("--all Run for all devices, including ACPI devices"); - P(""); - P("-g"); - P("--get Get average brightness on devices"); - P(""); - P("-s"); - P("--set LEVEL[%] Set brightness on devices"); - P(""); - P("+LEVEL Increase brightness on devices by actual value"); - P("-LEVEL Decrease brightness on devices by actual value"); - P("=LEVEL Set brightness on devices by actual value"); - P(""); - P("+LEVEL% Increase brightness on devices by percentage-points"); - P("-LEVEL% Decrease brightness on devices by percentage-points"); - P("=LEVEL% Set brightness on devices by percentage-points"); - P(""); - P("+LEVEL%% Increase brightness on devices by percentage"); - P("-LEVEL%% Decrease brightness on devices by percentage"); - P("=LEVEL%% Set brightness on devices by percentage"); - P(""); - P(""); - P("KEYBOARD:"); - P(""); - P("←"); - P("↓ Darken the screen"); - P(""); - P("→"); - P("↑ Brighten the screen"); - P(""); - P("q"); - P("enter"); - P("C-d Continue to next controller, or if at last, quit"); - P(""); - P(""); - P(""); - P("Copyright © " _YEARS_ " Mattias Andrée (maandree@member.fsf.org)"); - P(""); - P("This program is free software: you can redistribute it and/or modify"); - P("it under the terms of the GNU General Public License as published by"); - P("the Free Software Foundation, either version 3 of the License, or"); - P("(at your option) any later version."); - P(""); - return 0; - } - } - - - /* Check permissions */ - if (getuid()) /* Always accept root */ - { - struct group* video_grp = getgrnam("video"); - if (video_grp) /* Accept everypony if the group ‘video’ does not exist */ - { - struct passwd* realuser = getpwuid(getuid()); - char** mems; - char* realname; - int ok; - if (!realuser) - { - P("You do not exist, go away!"); - return 1; - } - mems = video_grp->gr_mem; - realname = realuser->pw_name; - ok = 0; - for (; *mems; mems++) - if (!strcmp(realname, *mems)) - { - ok = 1; - break; - } - endgrent(); - if (!ok) - { - P("Sorry, you need to be in the group 'video'."); - return 1; - } - } - endpwent(); - } - - - if (!get && !set) - { - P("\n"); - P("If the program is abnormally aborted the may be some residual"); - P("effects on the terminal. the following commands should reset it:"); - P(""); - P(" stty icanon echo"); - P(" echo -en '\\e[?25h'"); - P(""); - P("\n\n\n"); - } - - - if (!get && !set) - { - /* Get the size of the terminal */ - if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1) - perror(*argv); - else - cols = win.ws_col; - - /* Hide cursor */ - printf("%s", "\033[?25l"); - fflush(stdout); - - /* stty -icanon -echo */ - if (tcgetattr(STDIN_FILENO, &stty)) - { - perror(*argv); - return 1; - } - saved_stty = stty; - stty.c_lflag &= (tcflag_t)~(ICANON | ECHO); - if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty)) - { - perror(*argv); - return 1; - } - } - - - /* Fork to diminish risk of unclean exit */ - if (!get && !set) - { - pid = FORK(); - if (pid == (pid_t)-1) - { - perror(*argv); - pid = 0; - } - } - - if (pid) - waitpid(pid, NULL, 0); - else - { - float brightness = 0; - int nbrightness = 0; - - if (!get && !set) - { - line = malloc((size_t)cols * 3 * sizeof(char)); - space = malloc((size_t)cols * sizeof(char)); - for (i = 0; i < (size_t)cols; i++) - { - *(line + i * 3 + 0) = (char)(0xE2); - *(line + i * 3 + 1) = (char)(0x94); - *(line + i * 3 + 2) = (char)(0x80); - *(space + i) = ' '; - } - *(space + cols - 1) = 0; - *(line + (cols - 2) * 3) = 0; - } - - if (ndevices) - { - char* device; - for (i = 0; i < ndevices; i++) - { - device = *(devices + i); - for (j = 0; *(device + j); j++) - if (*(device + j) == '/') - { - device += j + 1; - j = -1; - } - if (get) - { - float value = getbrightness(device); - if (value >= 0.f) - { - brightness += value; - nbrightness++; - } - } - else if (set) - setbrightness(device, set); - else - adjust(cols, device); - } - } - else - { - struct dirent* ent; - DIR* dir = opendir(BACKLIGHT_DIR); - if (dir) - { - char* device; - while ((ent = readdir(dir))) - { - device = ent->d_name; - if (all || (strstr(device, "acpi_video") != device)) - if (*device && (*device != '.')) - { - if (get) - { - float value = getbrightness(device); - if (value >= 0.f) - { - brightness += value; - nbrightness++; - } - } - else if (set) - setbrightness(device, set); - else - adjust(cols, device); - } - } - closedir(dir); - } - } - - if (!get && !set) - { - free(line); - free(space); - } - else if (get) - { - if (nbrightness) - { - brightness *= 100.f; - brightness /= (float)nbrightness; - printf("%.2f%%\n", (double)brightness); - fflush(stdout); - } - else - { - printf("%s\n", "100.00%"); - fflush(stdout); - } - } - } - - - if (!get && !set) - { - /* `stty icanon echo` */ - if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty)) - { - perror(*argv); - return 1; - } - - /* Show cursor */ - printf("%s", "\033[?25h"); - fflush(stdout); - } - - return 0; -} - - -/** - * Test whether a string numerical and with at most two trailing '%' - * - * @param str The string - * @return Whether the test passed - */ -static int isnumerical(const char* str) -{ - int p = 0, d = 0; - if ((*str == 0) || (*str == '%')) - return 0; - for (; *str; str++) - { - switch (*str) - { - case '.': - if (d++) - return 0; - /* fall through */ - case '0' ... '9': - if (p) - return 0; - break; - - case '%': - p++; - break; - - default: - return 0; - } - } - return p <= 2; -} - - -/** - * Interactively adjust the backlight on a device - * - * @param cols The number of columns on the terminal - * @param device The device on which to adjust backlight - */ -static void adjust(int cols, const char* device) -{ - int min, max, cur, step, init, i, d; - size_t lendir; - char* dir = alloca(PATH_MAX * sizeof(char)); - char* buf = alloca(256 * sizeof(char)); - - *dir = 0; - dir = strcat(dir, BACKLIGHT_DIR "/"); - dir = strcat(dir, device); - dir = strcat(dir, "/"); - lendir = strlen(dir); - - /* Get brightness parameters */ - min = 0; - if (readfile(buf, strcat(dir, "max_brightness"))) - return; - max = atoi(unnl(buf)); - *(dir + lendir) = 0; - if (readfile(buf, strcat(dir, "brightness"))) - return; - cur = atoi(unnl(buf)); - - if (max <= min) - return; /* what the buck */ - - step = (max - min) / 200 ?: 1; - init = cur; - - P("\n\n\n\n\n"); - bars(min, max, init, cur, cols); - - while ((d = getchar()) != -1) - switch (d) - { - case 'q': - case '\n': - case 4: - P(""); - return; - - case 'A': - case 'C': - cur += step << 1; - /* fall through */ - case 'B': - case 'D': - cur -= step; - if (cur < min) cur = min; - if (cur > max) cur = max; - if (writefile(buf, cur, dir)) - return; - bars(min, max, init, cur, cols); - } -} - - - -/** - * Gets the current backlight setting on a device - * - * @param device The device from which to get backlight - * @return The brightness as a [0; 1] float, negative on error - */ -static float getbrightness(const char* device) -{ - int min, max, cur, i; - size_t lendir; - char* dir = alloca(PATH_MAX * sizeof(char)); - char* buf = alloca(256); - - *dir = 0; - dir = strcat(dir, BACKLIGHT_DIR "/"); - dir = strcat(dir, device); - dir = strcat(dir, "/"); - lendir = strlen(dir); - - /* Get brightness parameters */ - min = 0; - if (readfile(buf, strcat(dir, "max_brightness"))) - return -1.f; - max = atoi(unnl(buf)); - *(dir + lendir) = 0; - if (readfile(buf, strcat(dir, "brightness"))) - return -1.f; - cur = atoi(unnl(buf)); - - if (max <= min) - return -1.f; /* what the buck */ - - return (float)cur / (float)(max - min); -} - - - -/** - * Sets the current backlight setting on a device - * - * @param device The device from which to get backlight - * @param adjustment The adjustment to make - */ -static void setbrightness(const char* device, const char* adjustment) -{ - int min, max, cur, i, adj; - size_t lendir; - char* dir = alloca(PATH_MAX * sizeof(char)); - char* buf = alloca(256); - int act = 0, integer = 0, decimal = 0, p = 0, d = 0; - - *dir = 0; - dir = strcat(dir, BACKLIGHT_DIR "/"); - dir = strcat(dir, device); - dir = strcat(dir, "/"); - lendir = strlen(dir); - - /* Get brightness parameters */ - min = 0; - if (readfile(buf, strcat(dir, "max_brightness"))) - return; - max = atoi(unnl(buf)); - *(dir + lendir) = 0; - if (readfile(buf, strcat(dir, "brightness"))) - return; - cur = atoi(unnl(buf)); - - if (max <= min) - return; /* what the buck */ - - /* Read -/+/= head */ - if (*adjustment == '-') - act = -1; - else if (*adjustment == '+') - act = 1; - else if (*adjustment != '=') - adjustment--; - adjustment++; - - /* Parse numerical part */ - for (; *adjustment && (*adjustment != '%'); adjustment++) - if (*adjustment == '.') - d = 1; - else if (d) - { - if ((long long)d * 10 > (long long)INT_MAX) - continue; - if ((long long)decimal * 10 + 9 > (long long)INT_MAX) - continue; - d *= 10; - decimal *= 10; - decimal += (*adjustment) - '0'; - } - else - { - integer *= 10; - integer += (*adjustment) - '0'; - } - if (!d) - d = 1; - - /* Count number of p:s */ - while (*adjustment++) - p++; - - /* Calculate value to send */ - if (p == 0) - adj = integer + (int)((double)decimal / (double)d + 0.5d); - else if (p == 1) - adj = (int)(((double)integer + (double)decimal / (double)d) * (double)(max - min) / 100.d); - else - adj = (int)(((double)integer + (double)decimal / (double)d) * (double)cur / 100.d); - adj = (act & 1) * cur + (act | 1) * adj; - if (adj < min) adj = min; - if (adj > max) adj = max; - - /* Send value */ - writefile(buf, adj, dir); -} - - - -/** - * Read a file - * - * @param output Buffer to store the file's content in - * @param file The file to read - * @return Zero on success, non-zero on failure - */ -static int readfile(char* output, const char* file) -{ - #define BLOCK_SIZE 256 /* We will not even encounter that much */ - FILE* f; - size_t got, have = 0; - int ended = 0; - - if ((f = fopen(file, "r")) == NULL) - { - perror(file); - return -1; - } - - while (!ended) - { - got = fread(output + have, 1, BLOCK_SIZE, f); - if (got != BLOCK_SIZE) - { - ended = feof(f); - have += got; - clearerr(f); - fclose(f); - if (!ended) - { - perror(file); - return -1; - } - } - else - have += got; - } - - *(output + have) = 0; - return 0; -} - - - -/** - * Write an integer to a file - * - * @param buffer Buffer for temporary data - * @param integer The integer to write - * @param file The file to which to write - * @return Zero on success, non-zero on failure - */ -static int writefile(char* buffer, int integer, const char* file) -{ - FILE* f; - size_t n = 0; - - buffer += 32; - do - { - *(buffer - n++) = (char)((integer % 10) + '0'); - integer /= 10; - } - while (integer); - buffer -= n - 1; - *(buffer + n++) = '\n'; - - if ((f = fopen(file, "w")) == NULL) - { - perror(file); - return -1; - } - - if (fwrite(buffer, 1, n, f) != n) - { - perror(file); - fclose(f); - return -1; - } - - fflush(f); - fclose(f); - return 0; -} - - - -/** - * Print the status - * - * @param min The minimum possible brightness - * @param max The maximum possible brightness - * @param init The brightness used when the program started - * @param cur The current brightness - * @param cols The number of columns on the terminal - */ -static void bars(int min, int max, int init, int cur, int cols) -{ - int mid = (int)((float)(cur - min) * (float)(cols - 2) / (float)(max - min) + 0.5f); - - printf("\033[1000D\033[6A"); - printf("\033[2K┌%s┐\n", line); - *(space + mid) = 0; - printf("\033[2K│\033[47m%s\033[49m%s│\n", space, space + mid + 1); - *(space + mid) = ' '; - printf("\033[2K└%s┘\n", line); - printf("\033[2KMaximum brightness: %i\n", max); - printf("\033[2KInitial brightness: %i\n", init); - printf("\033[2KCurrent brightness: %i\n", cur); - - fflush(stdout); -} - |