Simplify, do not install examples or info manual, and change license3.1.7

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

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-\input texinfo   @c -*-texinfo-*-
-
-@c %**start of header
-@setfilename bus.info
-@settitle bus
-@afourpaper
-@documentencoding UTF-8
-@documentlanguage en
-@finalout
-@c %**end of header
-
-
-@dircategory Interprorcess Communication
-@direntry
-* bus: (bus).                        A simple daemonless system for broadcasting messages locally
-@end direntry
-
-
-@copying
-Copyright @copyright{} 2015 Mattias Andrée
-
-@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 bus -- A simple daemonless system for broadcasting messages locally
-@insertcopying
-@end ifnottex
-
-@titlepage
-@title bus
-@subtitle A simple daemonless system for broadcasting messages locally
-@author by Mattias Andrée (maandree)
-
-@page
-@vskip 0pt plus 1filll
-@insertcopying
-@page
-@end titlepage
-
-@contents
-
-
-@iftex
-@macro xrm{}
-@rm{}
-@end macro
-@macro xtt{}
-@tt{}
-@end macro
-@end iftex
-
-@ifnottex
-@macro xrm{}
-@end macro
-@macro xtt{}
-@end macro
-@end ifnottex
-
-@menu
-* Overview::                        Brief overview of @command{bus}.
-* Standard::                        How to use @command{bus} properly.
-* Invoking::                        Executing @command{bus}.
-* Interface::                       Using @command{libbus}.
-* Protocol::                        How communication over @command{bus} works internally.
-* Rationale::                       Why @command{bus}?
-* Examples::                        Usecase examples and API-demonstration.
-* GNU Free Documentation License::  Copying and sharing this manual.
-
-@detailmenu
- --- The Detailed Node Listing ---
-
-Invoking
-
-* bus create::                      Create a bus.
-* bus remove::                      Remove a bus.
-* bus listen::                      Listen for new message on a bus.
-* bus wait::                        Listen for one new message only on a bus.
-* bus broadcast::                   Broadcast a message on a bus.
-* bus chmod::                       Change permissions on a bus.
-* bus chown::                       Change ownership of a bus.
-* bus chgrp::                       Change group ownership of a bus.
-
-Examples
-
-* Audio-volume control::
-* Telephony and music::
-* Timed::
-* Nonblocking::
-* Daemon-dependencies::
-
-@end detailmenu
-@end menu
-
-
-
-@node Overview
-@chapter Overview
-
-@command{bus} is a stupid-simple, thrilless, daemonless interprocess
-communication system for broadcasting messages. It is a lightweight
-alternative to a two-phase interprocess flexible barrier.
-
-@command{bus} uses a System V semaphore array and System V shared
-memory. Buses are named; the key of the semaphore array and the
-shared memory is stored in a regular file.
-
-The shared memory used by @command{bus} is always 2048 bytes.
-Additionally all messages should be encoded in UTF-8 and not contain
-any NULL characters, except they @emph{must} always end with a NULL
-byte. Furthermore messages should be prefixed with the process
-identifer of the process whence the message originated, followed
-by a space. If the process is ephemeral@footnote{The process exits
-after the broadcast, or shortly thereafter.}, 0 should be used
-instead of the process identifier.
-
-Communication over @command{bus} is synchronous. The broadcast call
-does not return until all listeners have received (and copied) the
-message. A malfunctioning program can lock the bus.
-
-This software package contains a C library and a command line
-utility. The package python-bus provides a Python 3 module.
-
-
-
-@node Standard
-@chapter Standard
-
-The command @command{bus create} can be used to create new buses. By
-convention, buses should be stored in @file{$XDG_RUNTIME_DIR/bus},
-this is what @command{bus create} does if no pathname is given. The
-pathname of the bus should be tracked using @env{BUS_X}, where @env{X}
-is replaced with either:
-
-@table @env
-@item GENERIC
-For the bus used in generic cases. That is all but the cases
-of the buses listed below.
-@item AUDIO
-For the bus used in with the audio subsystem is involved.
-@item VIDEO
-For the bus used in with the video subsystem is involved.
-@item INPUT
-For the bus used in with the input subsystem is involved.
-@item FILES
-For the bus used in with the storage subsystem is involved.
-@end table
-
-This list may be extended in the future. Therefore, and for
-other conventions, project-private buses should be tracked
-using @env{X_BUS}, where @env{X} is the project name.
-
-Messages broadcasted on a bus cannot be longer than 2047 bytes,
-excluding NUL termination. Message should be encoded in UTF-8,
-and most not contain the NUL character.
-
-Broadcasted message should start with the process ID whence
-the message originated, followed by a single regular space.
-If the process is ephemeral@footnote{The process exits after
-the broadcast, or shortly thereafter.}, 0 should be used instead
-of the process identifier.
-
-
-
-@node Invoking
-@chapter Invoking
-
-@command{bus} includes the following commands:
-
-@table @command
-@item create
-Create a bus.
-See @ref{bus create} for more information.
-@item remove
-Remove a bus.
-See @ref{bus remove} for more information.
-@item listen
-Listen for new message on a bus.
-See @ref{bus listen} for more information.
-@item wait
-Listen for one new message only on a bus.
-See @ref{bus wait} for more information.
-@item broadcast
-Broadcast a message on a bus.
-See @ref{bus broadcast} for more information.
-@item chmod
-Change permissions on a bus.
-See @ref{bus chmod} for more information.
-@item chown
-Change ownership of a bus.
-See @ref{bus chown} for more information.
-@item chgrp
-Change group ownership of a bus.
-See @ref{bus chgrp} for more information.
-@end table
-
-Upon successful completion, these commands exit with the value
-0. On failure, they exit with the value 1. If the command is
-not recognised the exit value is 2.
-
-@menu
-* bus create::                      Create a bus.
-* bus remove::                      Remove a bus.
-* bus listen::                      Listen for new message on a bus.
-* bus wait::                        Listen for one new message only on a bus.
-* bus broadcast::                   Broadcast a message on a bus.
-* bus chmod::                       Change permissions on a bus.
-* bus chown::                       Change ownership of a bus.
-* bus chgrp::                       Change group ownership of a bus.
-@end menu
-
-
-
-@node bus create
-@section @command{bus create}
-
-The syntax for invocation of @command{bus create} is
-@example
-bus create [-x] [--] [@var{PATHNAME}]
-@end example
-
-The command creates a bus and stores the key to it in the
-file @var{PATHNAME}. If @var{PATHNAME} is omitted, a
-random pathname in @file{$XDG_RUNTIME_DIR/bus} will be
-used and printed to stdout.
-
-If @option{-x} is used, the command will fail if
-the file @var{PATHNAME} already exists.
-
-
-
-
-@node bus remove
-@section @command{bus remove}
-
-The syntax for invocation of @command{bus remove} is
-@example
-bus remove [--] @var{PATHNAME}
-@end example
-
-The command removes the bus whose key is stored in
-the file @var{PATHNAME}.  The file holding the
-key is also unlinked.
-
-
-
-@node bus listen
-@section @command{bus listen}
-
-The syntax for invocation of @command{bus command} is
-@example
-bus listen [--] @var{PATHNAME} @var{COMMAND}
-@end example
-
-The command listens for new messages on the bus whose
-key is stored in the file @var{PATHNAME}. Once a message
-is received, @var{COMMAND} will be spawned with the
-environment variable @env{msg} (lowercased) set to the
-received message. @sc{POSIX} shell syntax applies to
-@var{COMMAND}.
-
-
-@node bus wait
-@section @command{bus wait}
-
-The syntax for invocation of @command{bus wait} is
-@example
-bus wait [--] @var{PATHNAME} @var{COMMAND}
-@end example
-
-The command listens for a new message on the bus whose
-key is stored in the file @var{PATHNAME}. Once a message
-is received, the process will stop listening for more
-messages and @var{COMMAND} will be spawned with the
-environment variable @env{msg} (lowercased) set to the
-received message. @sc{POSIX} shell syntax applies to
-@var{COMMAND}.
-
-
-
-@node bus broadcast
-@section @command{bus broadcast}
-
-The syntax for invocation of @command{bus broadcast} is
-@example
-bus broadcast [-n] [--] @var{PATHNAME} @var{MESSAGE}
-@end example
-
-The command broadcasts the message @var{MESSAGE} on the
-bus whose key is stored in the file @var{PATHNAME}.
-
-
-
-@node bus chmod
-@section @command{bus chmod}
-
-The syntax for invocation of @command{bus chmod} is
-@example
-bus chmod [--] @var{PERMISSIONS} @var{PATHNAME}
-@end example
-
-This command changes who have access to the bus whose key
-is stored in the file @var{PATHNAME}. In the permissions,
-the owner, the group, and others (not in tgroup) are
-represented by the symbols @code{u}@footnote{@code{u}
-stands for `user'.}, @code{g}, and @code{o}, respectively.
-The permissions string is imagined to have always be
-prefixed with an @code{=}. This symbols means that all user
-classes list after it, and only those classes, as permission
-to use the bus. Similarly the symbols @code{+} and @code{-}
-can be used to grant and revoke access, respectively. The
-symbols @code{=}, @code{+}, and @code{-} can be mixed, and
-are interpreted from left to right. Alternatively the
-permissions string can be a octal number, where the  owner
-is represented by any bit in 700 (100, 200, or 400, or any
-combination thereof), the group is represented by any bit
-in 70, and others (not in the group) is represented by any
-bit in 7.
-
-The current permission of the bus can be retrieved by
-running @command{stat} over the file @var{PATHNAME}.
-
-
-
-@node bus chown
-@section @command{bus chown}
-
-The syntax for invocation of @command{bus chown} is
-@example
-bus chown [--] @var{OWNER}[:@var{GROUP}] @var{PATHNAME}
-@end example
-
-This command changes the owner, that owns the bus whose
-key is stored in the file @var{PATHNAME}, to the specified
-owner. The owner can be specified either with a numerical
-user identifier or with a user name. If a group is
-specified, the bus's owner-group will be set to that group,
-otherwise the group will remain unchanged (not changed
-to the group of the new owner.) The group can be specified
-either with a numerical group identifier or with a group
-name.
-
-The current ownership of the bus can be retrieved by
-running @command{stat} over the file @var{PATHNAME}.
-
-
-
-@node bus chgrp
-@section @command{bus chgrp}
-
-The syntax for invocation of @command{bus chgrp} is
-@example
-bus chgrp [--] @var{GROUP} @var{PATHNAME}
-@end example
-
-This command changes the group, that owns the bus whose
-key is stored in the file @var{PATHNAME}, to the specified
-group. The group can be specified either with a numerical
-group identifier or with a group name.
-
-The current ownership of the bus can be retrieved by
-running @command{stat} over the file @var{PATHNAME}.
-
-
-
-@node Interface
-@chapter Interface
-
-To use @command{libbus} in your C program, include the
-header file @file{<bus.h>} and link with the flag
-@option{-lbus}.
-
-With exception to @code{bus_poll} and @code{bus_poll_timed},
-all functions return @code{0} upon successful completion,
-and @code{-1} in case of failure. @code{bus_poll} and
-@code{bus_poll_timed} return @code{NULL} on failure.
-On failure on all functions set @code{errno} to indicate
-what went wrong.
-
-@file{<bus.h>} defines the following functions:
-
-@table @code
-@item int bus_create(const char *file, int flags, char **out_file)
-This function creates a bus with the asscoiated pathname
-specifed by the value of the parameter @code{file}. If
-@code{file} is @code{NULL} a random pathname is selected.
-This pathname adheres to the convention set forth by
-in @ref{Standard}.
-
-If @code{file} is not @code{NULL} the function fails if the
-file already exists if @code{flags} contains @code{BUS_EXCL}.
-Otherwise if @code{file} is not @code{NULL}, the function
-does nothing if the file already exists.
-
-If @code{flags} contains @code{BUS_INTR}, the function fails
-if it is interrupted.
-
-Unless @code{out_file} is NULL, the pathname of the bus
-should be stored in a new char array stored in @code{*out_file}.
-The caller must free the allocated stored in @code{*out_file}.
-
-If the processes cannot allocate enough memory to perform
-the action, the function sets @code{errno} to @code{ENOMEM}
-and fails. It may also fail and set @code{errno} to any of
-the errors specified for the system calls @code{open} and
-@code{write}.
-
-@item int bus_unlink(const char *file)
-This function removes the bus assoicated with the pathname
-stored in the parameter @code{file}. The function also
-unlinks the file.
-
-The function may set @code{errno} to any of the following
-values and fail for the specified reasons:
-@table @code
-@item EINVAL
-The bus does not exist.
-@item EACCES
-Operation permission is denied to the calling process.
-@item EPERM
-The user does not have permission to remove the bus.
-@end table
-@noindent
-It may also fail and set @code{errno} to any of the errors
-specified for the system calls @code{unlink} and @code{open},
-and the functions @code{semget} and @code{shmget}.
-
-@item int bus_open(bus_t *bus, const char *file, int flags)
-This function acquires resources required for the process
-to use the bus associated with the filename stored in the
-parameter @code{file}. The function also stores the resources
-in @code{bus} for use by other @command{bus} functions.
-
-Values for @code{flags} are constructed by a bitwise
-inclusive @sc{or} of flags from the following list.
-@table @code
-@item BUS_RDONLY
-The process will only be using the bus for receiving messages.
-@item BUS_WRONLY
-The process will only be using the bus for sending messages.
-@item BUS_RDWR
-The process will use the bus for both receiving and sending
-messages.
-@end table
-
-The function may set @code{errno} to any of the following
-values and fail for the specified reasons:
-@table @code
-@item ENOMEM
-The process cannot allocate enough memory to perform the
-action.
-@item EACCES
-Operation permission is denied to the calling process.
-@item EINVAL
-The described bus does not exist.
-@end table
-@noindent
-It may also fail and set @code{errno} to any of the errors
-specified for the system call @code{open}.
-
-@item int bus_close(bus_t *bus)
-This function disposes of resources allocated to the
-process, as referenced in the parameter @code{bus}.
-
-The function fails and sets @code{errno} to @code{EINVAL}
-if the bus does not exist.
-
-@item int bus_write(const bus_t *bus, const char *message, int flags)
-This function broadcasts a message on the bus whose
-information is stored in the parameter @code{bus}. The
-message read by the function is stored in the parameter
-@code{message}. It may not exceeed 2048 bytes, including
-NUL termination.
-
-The function shall fail, and set @code{errno} to
-@code{EAGAIN}, if the call would suspend the process and
-@code{flags} contains @code{BUS_NOWAIT}.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the function @code{semop}.
-
-@item int bus_write_timed(const bus_t *bus, const char *message, const struct timespec *timeout, clockid_t clockid)
-This function behaves like @code{bus_write}, except if it
-is not able to write the message within the specified time,
-it will fail and set @code{errno} to @code{EAGAIN}. The
-time is specified as an absolute time using the parameter
-@code{timeout}. The behaviour is unspecified if @code{timeout}
-is @code{NULL}. @code{timeout} is measured with the clock whose
-identifier is specified by the parameter @code{clockid}. This
-clock must be a predicitable clock@footnote{There are probably
-other, undocumented, seemingly arbitrary restrictions too.}.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the functions @code{semop} and
-@code{clock_gettime}.
-
-@item int bus_read(const bus_t *bus, int (*callback)(const char *message, void *user_data), void *user_data)
-This function waits for new message to be sent on the bus
-specified in the @code{bus} parameter, as provieded by a
-previous call to the function @code{bus_open}. Once a
-message is received, the parameter-function @code{callback}
-is invoked. The parameter @code{message} in @code{callback}
-is the received message, and @code{user_data} in
-@code{callback} should be @code{user_data} from @code{bus_read}.
-However, once the function [@code{bus_read}] has ensured
-that it will receive any message sent on the bus, it shall
-invoke the parameter-function @code{callback} with
-@code{message} set to @code{NULL}, to notify the process that
-it can perform any action that requires that it is listening
-on the bus.
-
-After @code{callback} returns, @code{message} may be override.
-Therefore @code{callback} should copy message and start a new
-thread that uses the copy of @code{message}. @code{callback}
-shall return @code{-1} on failure, @code{0} if the function
-[@code{bus_read}] should stop listening, or @code{1} if
-the function should continue listening.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the function @code{semop}.
-
-@item int bus_read_timed(const bus_t *bus, int (*callback)(const char *message, void *user_data), void *user_data, const struct timespec *timeout, clockid_t clockid)
-This function behaves like @code{bus_read}, except it will
-automatically fail and set @code{errno} to @code{EAGAIN} when
-the specified time has passed. The time is specified as an
-absolute time using the parameter @code{timeout}. The
-behaviour is unspecified if @code{timeout} is @code{NULL}.
-@code{timeout} is measured with the clock whose identifier
-is specified by the parameter @code{clockid}. This clock
-must be a predicitable clock@footnote{There are probably
-other, undocumented, seemingly arbitrary restrictions too.}.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the functions @code{semop} and
-@code{clock_gettime}.
-
-@item int bus_poll_start(bus_t *bus)
-@itemx int bus_poll_stop(const bus_t *bus)
-@itemx const char *bus_poll(bus_t *bus, int flags)
-@itemx const char *bus_poll_timed(bus_t *bus, const struct timespec *timeout, clockid_t clockid)
-The function @code{bus_poll} waits for a message to be
-broadcasted on the bus, and return the message it receives.
-The function fails if @code{flags} contains @code{BUS_NOWAIT}
-and there is not already a message waiting on the bus.
-Received messages shall be copied and parsed, and acted
-upon, in a separate thread, and the function @code{bus_poll}
-or the function @code{bus_poll_stop} called again as soon
-as possible.
-
-The funcion @code{bus_poll_start} must be called before
-@code{bus_poll} is called for the first time. When the
-process is done listening on the bus, it must call the
-function @code{bus_poll_stop}.
-
-The function @code{bus_poll_timed} behaves like the function
-@code{bus_poll}, except if it is not able to read a message
-within the specified time, it will fail and set @code{errno}
-to @code{EAGAIN}. The time is specified as an absolute time
-using the parameter @code{timeout}. The behaviour is
-unspecified if @code{timeout} is @code{NULL}. @code{timeout}
-is measured with the clock whose identifier is specified by
-the parameter @code{clockid}. This clock must be a predicitable
-clock@footnote{There are probably other, undocumented,
-seemingly arbitrary restrictions too.}.
-
-Upon successful completion, the functions @code{bus_poll} and
-@code{bus_poll_timed} returns the received message.
-
-These functions may fail and set @code{errno} to any of the
-errors specified for the function @code{semop}. The function
-@code{bus_poll_timed} may also set @code{errno} to any of
-the errors specified for @code{clock_gettime}.
-
-@item int bus_chown(const char *file, uid_t owner, gid_t group)
-This function changes the owner and the group of the bus,
-associated with the file whose pathname is stored in the
-parameter @code{file}, to the owner and group specified by
-the parameters @code{owner} and @code{group}, respectively.
-
-The current ownership of a bus can be retrieved by calling
-@code{stat} over the pathname of the bus.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the functions @code{bus_open},
-@code{chown}, @code{semget}, @code{shmget}, and @code{shmctl}
-as well as any errors specified for the commands
-@code{IPC_STAT} and @code{IPC_SET} for the function
-@code{semctl}.
-
-@item int bus_chmod(const char *file, mode_t mode)
-This function gives access to the bus associated with the
-file whose pathname is stored in the parameter @code{file}
-according to the following rules:
-
-@itemize @bullet{}
-@item
-If @code{mode} contains any of the bits @code{S_IRWXU}
-contains, the owner should be given full access to the
-bus. Otherwise the owner should have no access.
-@item
-If @code{mode} contains any of the bits @code{S_IRWXG}
-contains, the group should be given read and write
-access to the bus. Otherwise the group should have no
-access.
-@item
-If @code{mode} contains any of the bits @code{S_IRWXO}
-contains, users that are neither the owner nor member
-of the group should be given read and write access to
-the bus. Otherwise they should have no access.
-@end itemize
-
-The current permissions of a bus can be retrieved by calling
-@code{stat} over the pathname of the bus.
-
-The function may fail and set @code{errno} to any of the
-errors specified for the functions @code{bus_open},
-@code{chmode}, @code{semget}, @code{shmget}, and @code{shmctl}
-as well as any errors specified for the commands
-@code{IPC_STAT} and @code{IPC_SET} for the function
-@code{semctl}.
-@end table
-
-There is not reason for poking around in @code{bus_t}
-(@code{struct bus}). It should be considered opaque.
-You can read the documentation in @file{<bus.h>} if
-you want to know what is in it.
-
-
-
-
-@node Protocol
-@chapter Protocol
-
-@command{bus} is built upon following three procedures.
-
-@noindent
-@code{create}
-@example
-@w{@xrm{}Select a filename.@xtt{}}
-
-@w{@xrm{}Create XSI semaphore array @{@code{S} = 0, @code{W} = 0, @code{X} = 1, @code{Q} = 0, @code{N} = 0@}@xtt{}}
-@w{@xrm{}with random key. Store the semaphore array's key in decimal form@xtt{}}
-@w{@xrm{}on the first line in the selected file.@xtt{}}
-
-@w{@xrm{}Create XSI shared memory, with an allocation of 2048 bytes, with@xtt{}}
-@w{@xrm{}a random key. Store the shared memory's key in decimal form on@xtt{}}
-@w{@xrm{}the second line in the selected file.@xtt{}}
-@end example
-
-@noindent
-@code{broadcast}
-@example
-with P(X):
-  Z(W)
-  @w{@xrm{}Write NUL-terminate message to shared memory@xtt{}}
-  with V(N): -- (1)
-    Q := 0
-    Z(S)
-
--- (1) @w{@xrm{}may be omitted if semaphores are known that@xtt{}}
-   @w{P()@xrm{}, @xtt{}Z()@xrm{}, @xtt{}V()@xrm{} cannot create a race condition@xtt{}}
-   @w{@xrm{}with a processes running @xtt{}Z()@xrm{}.@xtt{}}
-@end example
-
-@noindent
-@code{listen}
-@example
-with V(S):
-  forever:
-    V(Q)
-    Z(Q)
-    @w{@xrm{}Read NUL-terminated message from shared memory@xtt{}}
-    if breaking:
-      break
-    with V(W):
-      with P(S):
-        Z(S)
-        Z(N)
-@end example
-
-@noindent
-@code{V(a)} means that semaphore a is released.@*
-@code{P(a)} means that semaphore a is acquired.@*
-@code{Z(a)} means that the process waits for semaphore a to become 0.@*
-@code{with P(a)} that @code{P(a)} is done before the entering the scope,
-and @code{V(a)} is done when exiting the scope. It also means that
-these actions [@code{P(a)} and @code{V(a)}] are undone when the process
-exits, or if the call fails.@*
-@code{with V(a)} is to @code{V(a)} as @code{with P(a)} is to @code{P(a)}.
-
-
-
-@node Rationale
-@chapter Rationale
-
-We need an interprocess communication system similar
-to message queues. But we need broadcasting rather than
-anycasting, so we have a fast, simple and daemonless
-system for announcing events to any processes that
-might be interested.
-
-
-
-@node Examples
-@chapter Examples
-
-This chapter contains usecase examples and
-API-demonstrations. You will find that they are (on
-a standard installation) installed on your system.
-
-@menu
-* Audio-volume control::
-* Telephony and music::
-* Timed::
-* Nonblocking::
-* Daemon-dependencies::
-@end menu
-
-
-
-
-@node Audio-volume control
-@section Audio-volume control
-
-Assume you have program that display the audio volume.
-This program checks every second third if the volume
-have changed.
-
-Also assume that you use @command{amixer} to change the
-volume, most often by using keybindings via @command{xbindkeys}.
-
-To reduce the delay, you want to send a signal to the
-monitor program that the volume have changed. For this
-more primitive IPC is sufficient, but lets assume there
-are other programs interested in this information too.
-
-To accomplish this, you create a wrapper for @command{amixer}
-that broadcasts updates on a bus. This wrapper is
-installed as @command{~/.local/bin/amixer}, and
-@command{~/.local/bin/} is included in @env{$PATH}
-before @command{/usr/bin}.
-@*
-
-@noindent
-Before starting run @command{./init}, this code is
-should be run from your profile file if you want to
-implement this on your system. After running
-@command{./init}, you can start one or more listeners
-by running @command{./alsa-monitor}.
-
-To change the volume run
-@code{./amixer -c 0 -- set Master 5%+} or similar.
-
-When you are done run @command{./cleanup}.
-
-
-@subsubheading @file{./amixer}
-@example
-#!/bin/sh
-/usr/bin/amixer "$@@"
-for arg in "$@@"; do
-  if [ "$@{arg@}" = "set" ]  || \
-     [ "$@{arg@}" = "sset" ] || \
-     [ "$@{arg@}" = "cset" ]; then
-    exec bus broadcast "/tmp/example-bus" '0 volume-changed *'
-  fi
-done
-@end example
-
-
-@subsubheading @file{./cleanup}
-@example
-#!/bin/sh
-exec bus remove "/tmp/example-bus"
-@end example
-
-
-@subsubheading @file{./init}
-@example
-#!/bin/sh
-bus create "/tmp/example-bus"
-
-# @w{@xrm{}The following code is more suitable in the real world,@xtt{}}
-# @w{@xrm{}if used, the other files should use @xtt{}"$@{BUS_AUDIO@}"}
-# @w{@xrm{}instead of @xtt{}"/tmp/example-bus"@xrm{}.@xtt{}}
-# 
-# export BUS_AUDIO="$@{XDG_RUNTIME_DIR@}/bus/audio"
-# if [ ! -f "$@{BUS_AUDIO@}" ]; then
-#   bus create "$@{BUS_AUDIO@}"
-# fi
-@end example
-
-
-@subsubheading @file{./monitor}
-@example
-#!/bin/sh
-if [ $# = 1 ]; then
-  if [ "$(echo "$@{1@}" | cut -d ' ' -f 2)" = "volume-changed" ]; then
-    printf '\e[H\e[2J'
-    amixer get Master
-  fi
-  exit 0
-fi
-
-exec 2>/dev/null
-
-printf '\e[?1049h\e[H\e[2J'
-trap -- "printf '\e[?1049l'" SIGINT
-bus listen "/tmp/example-bus" \'"$@{0/\'/\'\\\'\'@}"\'' "$@{msg@}"'
-@end example
-
-
-
-@node Telephony and music
-@section Telephony and music
-
-Assume you have a music player and a telephony program.
-You might like it if the music player pauses whenever
-you make or receive a call. You may also like it, if
-the music resumed when the call ended.
-
-In this example we will assume you the have @command{mocp}
-(@command{moc} package) running. And we will use the shell to
-simulate a telephony program.
-@*
-
-@noindent
-First of, run make to build this example. Before
-starting run @command{./init}. And when you are
-done run @command{./cleanup}.
-
-In one terminal run @command{./monitor}. This program
-will pause @command{mocp} when you make or receive a call,
-it will also resume @command{mocp} when all calls have
-ended if it did pause @command{mocp}.
-
-Then start any positive number of terminals.
-We will pretend that each of them are telephony
-programs. To make or receive a call, run
-@command{./receive-or-make-call}, when you want to
-end the pretend call, run @command{./end-call} from
-the terminal (or more accurately, from the same
-process.)
-
-
-@subsubheading @file{./Makefile}
-@example
-COMMANDS = init cleanup monitor end-call receive-or-make-call
-
-all: $@{COMMANDS@}
-%: %.c
-        $@{CC@} -Wall -Wextra -pedantic -std=c99 -lbus -o $@@ $<
-clean:
-        -rm $@{COMMANDS@}
-
-.PHONY: all clean
-@end example
-
-
-@subsubheading @file{./cleanup.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_unlink("/tmp/example-bus") && (perror("cleanup"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./end-call.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdint.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char message[BUS_MEMORY_SIZE];
-
-int main()
-@{
-  bus_t bus;
-  sprintf(message, "%ji unforce-pause", (intmax_t)getppid());
-  /* @w{@xrm{}Yes, PPID; in this example we pretend the shell is the telephony process.@xtt{}} */
-  t (bus_open(&bus, "/tmp/example-bus", BUS_WRONLY));
-  t (bus_write(&bus, message, 0));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("end-call");
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./init.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_create("/tmp/example-bus", 0, NULL) && (perror("init"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./monitor.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-static size_t pauser_count = 0;
-static size_t pausers_size = 0;
-static char* pausers = NULL;
-
-static int is_moc_playing(void)
-@{
-  return !WEXITSTATUS(system("env LANG=C mocp -i 2>/dev/null |"
-                             "grep 'State: PLAY' >/dev/null"));
-@}
-
-/* @w{@xrm{}In a proper implementation, message whould be copyied, and then@xtt{}}
- * @w{@xrm{}a new thread would be created that parsed the copy. But that is@xtt{}}
- * @w{@xrm{}too much for an example, especially since it would also require@xtt{}}
- * @w{@xrm{}a mutex to make sure two threads do not modify data at the same@xtt{}}
- * @w{@xrm{}time, causing chaos.@xtt{}} */
-static int callback(const char *message, void *user_data)
-@{
-  char *msg = NULL;
-  size_t len = 0;
-  if (message == 0)
-    return 1;
-  while ((len < 2047) && message[len])
-    len++;
-  msg = malloc((len + 1) * sizeof(char));
-  t (msg == NULL);
-  memcpy(msg, message, len * sizeof(char));
-  msg[len] = 0;
-  /* @w{@xrm{}BEGIN run as in a separate thread@xtt{}} */
-  if (pauser_count || is_moc_playing()) @{
-    char *begin = strchr(msg, ' ');
-    ssize_t pid;
-    int requests_pause;
-    if (begin == NULL)
-      goto done;
-    *begin++ = 0;
-    pid = (ssize_t)atoll(msg);
-    if (pid < 1) /* @w{@xrm{}We need a real PID, too bad there is@xtt{}}
-                  * @w{@xrm{}no convient way to detect if it dies.@xtt{}} */
-      goto done;
-    if ((strstr(begin, "force-pause ") == begin) ||
-        !strcmp(begin, "force-pause"))
-      requests_pause = 1;
-    else if ((strstr(begin, "unforce-pause ") == begin) ||
-             !strcmp(begin, "unforce-pause"))
-      requests_pause = 0;
-    else
-      goto done;
-    if ((size_t)pid >= pausers_size) @{
-      pausers = realloc(pausers, (size_t)(pid + 1) * sizeof(char));
-      t (pausers == NULL); /* @w{@xrm{}Let's ignore the memory leak.@xtt{}} */
-      memset(pausers + pausers_size, 0,
-             ((size_t)(pid + 1) - pausers_size) * sizeof(char));
-      pausers_size = (size_t)(pid + 1);
-    @}
-    if (pausers[pid] ^ requests_pause) @{
-      pauser_count += requests_pause ? 1 : -1;
-      pausers[pid] = requests_pause;
-      if (pauser_count == (size_t)requests_pause)
-        system(requests_pause ? "mocp -P" : "mocp -U");
-    @}
-  @}
-  /* @w{@xrm{}END run as in a separate thread@xtt{}} */
-  goto done;
-  (void) user_data;
-
-fail:
-  perror("monitor");
-  return -1;
-
-done:
-  free(msg);
-  return 1;
-@}
-
-int main()
-@{
-  bus_t bus;
-  t (bus_open(&bus, "/tmp/example-bus", BUS_RDONLY));
-  t (bus_read(&bus, callback, NULL));
-  bus_close(&bus);
-  free(pausers);
-  return 0;
-
-fail:
-  perror("monitor");
-  bus_close(&bus);
-  free(pausers);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./receive-or-make-call.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdint.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char message[BUS_MEMORY_SIZE];
-
-int main()
-@{
-  bus_t bus;
-  sprintf(message, "%ji force-pause", (intmax_t)getppid());
-  /* @w{@xrm{}Yes, PPID; in this example we pretend the shell is the telephony process.@xtt{}} */
-  t (bus_open(&bus, "/tmp/example-bus", BUS_WRONLY));
-  t (bus_write(&bus, message, 0));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("receive-or-make-call");
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-
-@node Timed
-@section Timed
-
-This example shows how to use timed operations.
-
-First of, run make to build this example.
-
-To start the example run @command{./init}. When you are
-done run @command{./cleanup}.
-
-Running instances of @command{./poll} will wait for new
-messages continuously, but with one second timeouts.
-
-@command{./slow-poll} works like @command{./poll}, except
-it will sleep for one second every time it receives
-a message.
-
-Running instances of @command{./read} will read for ten
-seconds and then time out.
-
-@command{./poll}, @command{./read}, and @command{./slow-poll}
-will stop if the message "stop" is broadcasted.
-
-@command{./write} will wait for atmost a tenth of a
-seconds before failing. This means that if two instances
-of @command{./write} is started at the same time one of
-them will fail if @command{./slow-poll} is running.
-
-@command{./poll}, @command{./read}, @command{./init} and
-@command{./cleanup} are run without any additional
-arguments. @command{./write} is run with the message
-as the second argument.
-
-
-@subsubheading @file{./Makefile}
-@example
-COMMANDS = init cleanup write poll read slow-poll
-
-all: $@{COMMANDS@}
-%: %.c
-        $@{CC@} -Wall -Wextra -pedantic -std=c99 -lbus -o $@@ $<
-clean:
-        -rm $@{COMMANDS@}
-
-.PHONY: all clean
-@end example
-
-
-@subsubheading @file{./cleanup.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_unlink("/tmp/example-bus") && (perror("cleanup"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./init.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_create("/tmp/example-bus", 0, NULL) && (perror("init"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./poll.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-int main()
-@{
-  bus_t bus;
-  const char *message;
-  long long tick = 0;
-  struct timespec timeout;
-  t (bus_open(&bus, "/tmp/example-bus", BUS_RDONLY));
-  t (bus_poll_start(&bus));
-  for (;;) @{
-    t (clock_gettime(CLOCK_MONOTONIC, &timeout));
-    timeout.tv_sec += 1;
-    message = bus_poll_timed(&bus, &timeout, CLOCK_MONOTONIC);
-    if (message == NULL) @{
-      t (errno != EAGAIN);
-      printf("waiting... %lli\n", ++tick);
-      continue;
-    @}
-    tick = 0;
-    message = strchr(message, ' ') + 1;
-    if (!strcmp(message, "stop"))
-      break;
-    printf("\033[01m%s\033[21m\n", message);
-  @}
-  t (bus_poll_stop(&bus));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("poll");
-  bus_poll_stop(&bus);
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./read.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static int callback(const char *message, void *user_data)
-@{
-  (void) user_data;
-
-  if (message == NULL)
-    return 1;
-
-  message = strchr(message, ' ') + 1;
-  if (!strcmp(message, "stop"))
-    return 0;
-  printf("%s\n", message);
-  return 1;
-@}
-
-int main()
-@{
-  bus_t bus;
-  struct timespec timeout;
-  t (bus_open(&bus, "/tmp/example-bus", BUS_RDONLY));
-  t (clock_gettime(CLOCK_MONOTONIC, &timeout));
-  timeout.tv_sec += 10;
-  t (bus_read_timed(&bus, callback, NULL, &timeout, CLOCK_MONOTONIC));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("poll");
-  bus_poll_stop(&bus);
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./slow-poll.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-int main()
-@{
-  bus_t bus;
-  const char *message;
-  long long tick = 0;
-  struct timespec timeout;
-  t (bus_open(&bus, "/tmp/example-bus", BUS_RDONLY));
-  t (bus_poll_start(&bus));
-  for (;;) @{
-    t (clock_gettime(CLOCK_MONOTONIC, &timeout));
-    timeout.tv_sec += 1;
-    message = bus_poll_timed(&bus, &timeout, CLOCK_MONOTONIC);
-    if (message == NULL) @{
-      t (errno != EAGAIN);
-      printf("waiting... %lli\n", ++tick);
-      continue;
-    @}
-    tick = 0;
-    message = strchr(message, ' ') + 1;
-    if (!strcmp(message, "stop"))
-      break;
-    printf("\033[01m%s\033[21m\n", message);
-    sleep(1);
-  @}
-  t (bus_poll_stop(&bus));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("poll");
-  bus_poll_stop(&bus);
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./write.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdint.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char message[BUS_MEMORY_SIZE];
-
-int main(int argc, char *argv[])
-@{
-  bus_t bus;
-  struct timespec timeout;
-  if (argc < 2) @{
-    fprintf(stderr, "%s: USAGE: %s message\n", argv[0], argv[0]);
-    return 2;
-  @}
-  sprintf(message, "0 %s", argv[1]);
-  t (bus_open(&bus, "/tmp/example-bus", BUS_WRONLY));
-  t (clock_gettime(CLOCK_MONOTONIC, &timeout));
-  timeout.tv_nsec += 100000000L;
-  t (bus_write_timed(&bus, message, &timeout, CLOCK_MONOTONIC));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("write");
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-
-@node Nonblocking
-@section Nonblocking
-
-This example shows how to use bus_poll instead of bus_read,
-and how to do non-blocking polling and non-blocking writing.
-
-First of, run make to build this example.
-
-To start the example run @command{./init}. When you are done
-run @command{./cleanup}.
-
-Running instances of @command{./poll} will check every second
-if there is a new inbound message. Between these checks
-@command{./write} will wait for all @command{./poll}:s to
-receive the message. This means that @command{./write} blocks
-while @command{./poll} sleeps. If two or more instances of
-@command{./write} is started at approximately the same time,
-only one will continue to write a message on the bus, the
-others will fail.
-
-@command{./poll} will stop if the message ``stop'' is
-broadcasted.
-
-@command{./poll}, @command{./init} and @command{./cleanup}
-are run without any additional arguments. @command{./write}
-is run with the message as the second argument.
-
-
-@subsubheading @file{./Makefile}
-@example
-COMMANDS = init cleanup write poll
-
-all: $@{COMMANDS@}
-%: %.c
-        $@{CC@} -Wall -Wextra -pedantic -std=c99 -lbus -o $@@ $<
-clean:
-        -rm $@{COMMANDS@}
-
-.PHONY: all clean
-@end example
-
-
-@subsubheading @file{./cleanup.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_unlink("/tmp/example-bus") && (perror("cleanup"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./init.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-
-int main()
-@{
-  return bus_create("/tmp/example-bus", 0, NULL) && (perror("init"), 1);
-@}
-@end example
-
-
-@subsubheading @file{./poll.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-int main()
-@{
-  bus_t bus;
-  const char *message;
-  long long tick = 0;
-  t (bus_open(&bus, "/tmp/example-bus", BUS_RDONLY));
-  t (bus_poll_start(&bus));
-  for (;;) @{
-    message = bus_poll(&bus, BUS_NOWAIT);
-    if (message == NULL) @{
-      t (errno != EAGAIN);
-      printf("waiting... %lli\n", ++tick);
-      sleep(1);
-      continue;
-    @}
-    tick = 0;
-    message = strchr(message, ' ') + 1;
-    if (!strcmp(message, "stop"))
-      break;
-    printf("\033[01m%s\033[21m\n", message);
-  @}
-  t (bus_poll_stop(&bus));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("poll");
-  bus_poll_stop(&bus);
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./write.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdint.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char message[BUS_MEMORY_SIZE];
-
-int main(int argc, char *argv[])
-@{
-  bus_t bus;
-  if (argc < 2) @{
-    fprintf(stderr, "%s: USAGE: %s message\n", argv[0], argv[0]);
-    return 2;
-  @}
-  sprintf(message, "0 %s", argv[1]);
-  t (bus_open(&bus, "/tmp/example-bus", BUS_WRONLY));
-  t (bus_write(&bus, message, BUS_NOWAIT));
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("write");
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-
-@node Daemon-dependencies
-@section Daemon-dependencies
-
-This example shows how bus can be used in an init system
-to provide ``aggressivly'' parallel startup of daemons.
-
-First of, run make to build this example.
-
-To start the example run @command{./init}. It will print in
-red export-statement you may want to run i other terminals.
-You will need to select at least one daemon, for example
-you can run @code{./init d-ntp}. The available pretend
-daemons are: @command{d-network}, @command{d-ntp}, and
-@command{d-ssh}.
-
-When you are done run @command{./cleanup} with @env{BUS_INIT}
-exported with the value printed by @command{./init}.
-
-
-@subsubheading @file{./Makefile}
-@example
-COMMANDS = announce await-ready await-started cleanup  \
-           init require start-daemon test-daemon
-
-all: $@{COMMANDS@}
-%: %.c
-        $@{CC@} -Wall -Wextra -pedantic -std=c99 -lbus -o $@@ $<
-clean:
-        -rm $@{COMMANDS@}
-        -rm -r run
-
-.PHONY: all clean
-@end example
-
-
-@subsubheading @file{./announce.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <unistd.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char arg[4098];
-
-int main(int argc, char *argv[])
-@{
-  bus_t bus;
-  if (argc < 3)
-    return fprintf(stderr, "USAGE: %s state daemon", *argv), 2;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
-  sprintf(arg, "%ji %s %s", (intmax_t)getppid(), argv[1], argv[2]);
-  t (bus_write(&bus, arg, 0));
-  t (bus_close(&bus));
-  return 0;
-
-fail:
-  perror("announce");
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./await-ready.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/wait.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char arg[4098];
-static int argc;
-static char **argv;
-static int remaining = 0;
-static char *started = NULL;
-static char msg[BUS_MEMORY_SIZE];
-
-static void announce_wait(pid_t pid)
-@{
-  bus_t bus;
-  int i;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
-  for (i = 1; i < argc; i++) @{
-    if (!started[i]) @{
-      sprintf(arg, "%ji awaiting-ready %s", (intmax_t)pid, argv[i]);
-      t (bus_write(&bus, arg, 0));
-    @}
-  @}
-  t (bus_close(&bus));
-  return;
-
-fail:
-  perror("await-ready");
-@}
-
-static int callback(const char *message, void *user_data)
-@{
-  int i;
-  char *arg2;
-  char *arg3;
-  pid_t pid;
-  pid_t ppid;
-
-  if (!message) @{
-    ppid = getppid();
-    pid = fork();
-    if (pid == 0) @{
-      if (fork() == 0)
-        announce_wait(ppid);
-      exit(0);
-    @} else @{
-      (void) waitpid(pid, NULL, 0);
-      /* @w{@xrm{}Let's pretend everything will go swimmingly.@xtt{}} */
-    @}
-    return 1;
-  @}
-
-  strncpy(msg, message, BUS_MEMORY_SIZE - 1);
-  msg[BUS_MEMORY_SIZE - 1] = 0;
-
-  arg2 = strchr(msg, ' ');
-  if (!arg2)
-    return 1;
-  arg3 = strchr(++arg2, ' ');
-  if (!arg3)
-    return 1;
-  *arg3++ = 0;
-
-  if (strcmp(arg2, "ready"))
-    return 1;
-
-  for (i = 1; i < argc; i++)
-    if (!started[i] && !strcmp(argv[i], arg3))
-      started[i] = 1, remaining--;
-
-  return !!remaining;
-  (void) user_data;
-@}
-
-int main(int argc_, char *argv_[])
-@{
-  bus_t bus;
-  int i;
-
-  argc = argc_;
-  argv = argv_;
-
-  if (argc < 2)
-    return fprintf(stderr, "USAGE: %s daemon...", *argv), 2;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_RDONLY));
-  started = calloc(argc, sizeof(char));
-  t (started == NULL);
-
-  started[0] = 1;
-  for (i = 1; i < argc; i++) @{
-    sprintf(arg, "grep '^%s$'"
-                 " <\"$@{XDG_RUNTIME_DIR@}/ready-daemons\""
-                 " >/dev/null",
-            argv[i]);
-    if (!WEXITSTATUS(system(arg)))
-      started[i] = 1;
-    else
-      remaining++;
-  @}
-
-  if (remaining)
-    bus_read(&bus, callback, NULL);
-
-  bus_close(&bus);
-  free(started);
-  return 0;
-
-fail:
-  perror("await-ready");
-  bus_close(&bus);
-  free(started);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./await-started.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/wait.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char arg[4098];
-static int argc;
-static char **argv;
-static int remaining = 0;
-static char *started = NULL;
-static char msg[BUS_MEMORY_SIZE];
-
-static void announce_wait(pid_t pid)
-@{
-  bus_t bus;
-  int i;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
-  for (i = 1; i < argc; i++) @{
-    if (!started[i]) @{
-      sprintf(arg, "%ji awaiting-started %s", (intmax_t)pid, argv[i]);
-      t (bus_write(&bus, arg, 0));
-    @}
-  @}
-  t (bus_close(&bus));
-  return;
-
-fail:
-  perror("await-started");
-@}
-
-static int callback(const char *message, void *user_data)
-@{
-  int i;
-  char *arg2;
-  char *arg3;
-  pid_t pid;
-  pid_t ppid;
-
-  if (!message) @{
-    ppid = getppid();
-    pid = fork();
-    if (pid == 0) @{
-      if (fork() == 0)
-        announce_wait(ppid);
-      exit(0);
-    @} else @{
-      (void) waitpid(pid, NULL, 0);
-      /* @w{@xrm{}Let's pretend everything will go swimmingly.@xtt{}} */
-    @}
-    return 1;
-  @}
-
-  strncpy(msg, message, BUS_MEMORY_SIZE - 1);
-  msg[BUS_MEMORY_SIZE - 1] = 0;
-
-  arg2 = strchr(msg, ' ');
-  if (!arg2)
-    return 1;
-  arg3 = strchr(++arg2, ' ');
-  if (!arg3)
-    return 1;
-  *arg3++ = 0;
-
-  if (strcmp(arg2, "started") && strcmp(arg2, "ready"))
-    return 1;
-
-  for (i = 1; i < argc; i++)
-    if (!started[i] && !strcmp(argv[i], arg3))
-      started[i] = 1, remaining--;
-
-  return !!remaining;
-  (void) user_data;
-@}
-
-int main(int argc_, char *argv_[])
-@{
-  bus_t bus;
-  int i;
-
-  argc = argc_;
-  argv = argv_;
-
-  if (argc < 2)
-    return fprintf(stderr, "USAGE: %s daemon...", *argv), 2;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_RDONLY));
-  started = calloc(argc, sizeof(char));
-  t (started == NULL);
-
-  started[0] = 1;
-  for (i = 1; i < argc; i++) @{
-    sprintf(arg, "grep '^%s$'"
-                 " <\"$@{XDG_RUNTIME_DIR@}/started-daemons\""
-                 " >/dev/null",
-            argv[i]);
-    if (!WEXITSTATUS(system(arg))) @{
-      started[i] = 1;
-    @} else @{
-      sprintf(arg, "grep '^%s$'"
-                   " <\"$@{XDG_RUNTIME_DIR@}/ready-daemons\""
-                   " >/dev/null",
-              argv[i]);
-      if (!WEXITSTATUS(system(arg)))
-        started[i] = 1;
-      else
-        remaining++;
-    @}
-  @}
-
-  if (remaining)
-    bus_read(&bus, callback, NULL);
-
-  bus_close(&bus);
-  free(started);
-  return 0;
-
-fail:
-  perror("await-started");
-  bus_close(&bus);
-  free(started);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./cleanup.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-int main()
-@{
-  char *bus_address = getenv("BUS_INIT");
-  if (!bus_address || !*bus_address) @{
-    fprintf(stderr, "$BUS_INIT has not been set, its export statement "
-                    "should have been printed in bold red by ./init\n");
-    return 1;
-  @}
-  t (bus_unlink(bus_address));
-  return 0;
-
-fail:
-  perror("cleanup");
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./d-network}
-@example
-#!/bin/sh
-PATH=.:$PATH
-d=d-network
-
-echo $d: starting
-sleep 2
-echo $d: ready
-announce ready $d
-@end example
-
-
-@subsubheading @file{./d-ntp}
-@example
-#!/bin/sh
-PATH=.:$PATH
-d=d-ntp
-
-require d-network
-echo $d: started
-announce started $d
-await-ready d-network
-echo $d: ready
-announce ready $d
-@end example
-
-
-@subsubheading @file{./d-ssh}
-@example
-#!/bin/sh
-PATH=.:$PATH
-d=d-ssh
-
-require d-network
-echo $d: starting
-sleep 1
-echo $d: started
-announce started $d
-sleep 1
-echo $d: ready
-announce ready $d
-@end example
-
-
-@subsubheading @file{./init.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/wait.h>
-
-#define t(stmt)  if (stmt) goto fail
-#define _2(...)  __VA_ARGS__, __VA_ARGS__
-
-static char msg[BUS_MEMORY_SIZE];
-static int argc;
-static char **argv;
-static char arg[4098];
-
-static void start_daemons()
-@{
-  int i;
-  for (i = 1; i < argc; i++)
-    if (fork() == 0)
-      execl("./start-daemon", "./start-daemon", argv[i], NULL); 
-@}
-
-static int callback(const char *message, void *user_data)
-@{
-  pid_t pid;
-  char *arg2;
-  char *arg3;
-  if (!message) @{
-    pid = fork();
-    t (pid == -1);
-    if (pid == 0) @{
-      if (fork() == 0) @{
-        start_daemons();
-      @}
-      exit(0);
-    @} else @{
-      (void) waitpid(pid, NULL, 0);
-      /* @w{@xrm{}Let's pretend everything will go swimmingly.@xtt{}} */
-    @}
-    return 1;
-  @}
-
-  strncpy(msg, message, BUS_MEMORY_SIZE - 1);
-  msg[BUS_MEMORY_SIZE - 1] = 0;
-
-  pid = fork();
-  t (pid == -1);
-
-  if (pid == 0) @{
-    if (fork() == 0) @{
-      arg2 = strchr(msg, ' ');
-      if (arg2 == NULL)
-        exit(0);
-      arg3 = strchr(++arg2, ' ');
-      if (arg3 == NULL)
-        exit(0);
-      *arg3++ = 0;
-      if (!strcmp(arg2, "require")) @{
-        execl(_2("./start-daemon"), arg3, NULL);
-      @} else if (!strcmp(arg2, "awaiting-started")) @{
-        execl(_2("./test-daemon"), arg3, "started", NULL);
-      @} else if (!strcmp(arg2, "awaiting-ready") ||
-                  !strcmp(arg2, "awaiting")) @{
-        execl(_2("./test-daemon"), arg3, "ready", NULL);
-      @} else if (!strcmp(arg2, "started")) @{
-        sprintf(arg,
-          "grep '^%s\\$' < \"%s\" >/dev/null || echo %s >> \"%s\"",
-          _2(arg3, "$@{XDG_RUNTIME_DIR@}/started-daemons"));
-        execlp(_2("sh"), "-c", arg, NULL);
-      @} else if (!strcmp(arg2, "ready")) @{
-        sprintf(arg,
-          "grep '^%s\\$' < \"%s\" >/dev/null || echo %s >> \"%s\"",
-          _2(arg3, "$@{XDG_RUNTIME_DIR@}/ready-daemons"));
-        execlp(_2("sh"), "-c", arg, NULL);
-      @}
-    @}
-    exit(0);
-  @} else @{
-    (void) waitpid(pid, NULL, 0);
-    /* @w{@xrm{}Let's pretend everything will go swimmingly.@xtt{}} */
-  @}
-
-  return 1;
-  (void) user_data;
-
-fail:
-  perror("init");
-  return -1;
-@}
-
-int main(int argc_, char *argv_[])
-@{
-  char *bus_address = NULL;
-  bus_t bus;
-  argv = argv_;
-  argc = argc_;
-  if (argc < 2) @{
-    fprintf(stderr, "USAGE: %s daemon...\n", *argv);
-    return 1;
-  @}
-  t (setenv("XDG_RUNTIME_DIR", "./run", 1));
-  /* @w{@xrm{}Real init systems with not have the period.@xtt{}} */
-  system("mkdir -p -- \"$@{XDG_RUNTIME_DIR@}\"");
-  system("truncate -s 0 -- \"$@{XDG_RUNTIME_DIR@}/started-daemons\"");
-  system("truncate -s 0 -- \"$@{XDG_RUNTIME_DIR@}/ready-daemons\"");
-  t (bus_create(NULL, 1, &bus_address));
-  fprintf(stderr, "\033[00;01;31mexport BUS_INIT=%s\033[00m\n",
-          bus_address);
-  fprintf(stderr, "\033[00;31mexport XDG_RUNTIME_DIR=./run\033[00m\n");
-  t (setenv("BUS_INIT", bus_address, 1));
-  t (bus_open(&bus, bus_address, BUS_RDONLY));
-  t (bus_read(&bus, callback, NULL));
-  bus_close(&bus);
-  free(bus_address);
-  return 0;
-
-fail:
-  perror("init");
-  bus_close(&bus);
-  free(bus_address);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./require.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <unistd.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char arg[4098];
-
-int main(int argc, char *argv[])
-@{
-  bus_t bus;
-  int i;
-  if (argc < 2)
-    return fprintf(stderr, "USAGE: %s daemon...", *argv), 2;
-  t (bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
-
-  for (i = 1; i < argc; i++) @{
-    sprintf(arg, "grep '^%s$' <\"%s\" >/dev/null",
-            argv[i], "$@{XDG_RUNTIME_DIR@}/started-daemons");
-    if (WEXITSTATUS(system(arg))) @{
-      sprintf(arg, "%ji require %s", (intmax_t)getppid(), argv[i]);
-      t (bus_write(&bus, arg, 0));
-    @}
-  @}
-
-  bus_close(&bus);
-  return 0;
-
-fail:
-  perror("require");
-  bus_close(&bus);
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./start-daemon.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-static char arg[4098];
-
-int main(int argc, char *argv[])
-@{
-  if (argc != 2) @{
-    fprintf(stderr, "This program should be called from ./init\n");
-    return 2;
-  @}
-
-  sprintf(arg, "grep '^%s$' <\"%s\" >/dev/null",
-          argv[1], "$@{XDG_RUNTIME_DIR@}/started-daemons");
-  if (!WEXITSTATUS(system(arg)))
-    return 0;
-  sprintf(arg, "grep '^%s$' <\"%s\" >/dev/null",
-          argv[1], "$@{XDG_RUNTIME_DIR@}/ready-daemons");
-  if (!WEXITSTATUS(system(arg)))
-    return 0;
-
-  sprintf(arg, "./%s", argv[1]);
-  execlp(arg, arg, NULL);
-  perror("start-daemon");
-  return 1;
-@}
-@end example
-
-
-@subsubheading @file{./test-daemon.c}
-@example
-#include <bus.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define t(stmt)  if (stmt) goto fail
-
-static char arg[4098];
-
-int main(int argc, char *argv[])
-@{
-  bus_t bus;
-  if (argc != 3) @{
-    fprintf(stderr, "This program should be called from ./init\n");
-    return 2;
-  @}
-
-retry:
-  sprintf(arg, "grep '^%s$'"
-               " <\"$@{XDG_RUNTIME_DIR@}/%s-daemons\""
-               " >/dev/null",
-          argv[1], argv[2]);
-  if (!WEXITSTATUS(system(arg))) @{
-    t (bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
-    sprintf(arg, "0 %s %s", argv[2], argv[1]);
-    t (bus_write(&bus, arg, 0));
-    bus_close(&bus);
-  @} else if (!strcmp(argv[2], "started")) @{
-    argv[2] = "ready";
-    goto retry;
-  @}
-  return 0;
-
-fail:
-  perror("test-daemon");
-  return 1;
-@}
-@end example
-
-
-
-@node GNU Free Documentation License
-@appendix GNU Free Documentation License
-@include fdl.texinfo
-
-@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.  It
-complements the GNU General Public License, which is a copyleft
-license designed for free software.
-
-We have designed this License in order to use it for manuals for free
-software, because free software needs free documentation: a free
-program should come with manuals providing the same freedoms that the
-software does.  But this License is not limited to software manuals;
-it can be used for any textual work, regardless of subject matter or
-whether it is published as a printed book.  We recommend this License
-principally for works whose purpose is instruction or reference.
-
-@item
-APPLICABILITY AND DEFINITIONS
-
-This License applies to any manual or other work, in any medium, that
-contains a notice placed by the copyright holder saying it can be
-distributed under the terms of this License.  Such a notice grants a
-world-wide, royalty-free license, unlimited in duration, to use that
-work under the conditions stated herein.  The ``Document'', below,
-refers to any such manual or work.  Any member of the public is a
-licensee, and is addressed as ``you''.  You accept the license if you
-copy, modify or distribute the work in a way requiring permission
-under copyright law.
-
-A ``Modified Version'' of the Document means any work containing the
-Document or a portion of it, either copied verbatim, or with
-modifications and/or translated into another language.
-
-A ``Secondary Section'' is a named appendix or a front-matter section
-of the Document that deals exclusively with the relationship of the
-publishers or authors of the Document to the Document's overall
-subject (or to related matters) and contains nothing that could fall
-directly within that overall subject.  (Thus, if the Document is in
-part a textbook of mathematics, a Secondary Section may not explain
-any mathematics.)  The relationship could be a matter of historical
-connection with the subject or with related matters, or of legal,
-commercial, philosophical, ethical or political position regarding
-them.
-
-The ``Invariant Sections'' are certain Secondary Sections whose titles
-are designated, as being those of Invariant Sections, in the notice
-that says that the Document is released under this License.  If a
-section does not fit the above definition of Secondary then it is not
-allowed to be designated as Invariant.  The Document may contain zero
-Invariant Sections.  If the Document does not identify any Invariant
-Sections then there are none.
-
-The ``Cover Texts'' are certain short passages of text that are listed,
-as Front-Cover Texts or Back-Cover Texts, in the notice that says that
-the Document is released under this License.  A Front-Cover Text may
-be at most 5 words, and a Back-Cover Text may be at most 25 words.
-
-A ``Transparent'' copy of the Document means a machine-readable copy,
-represented in a format whose specification is available to the
-general public, that is suitable for revising the document
-straightforwardly with generic text editors or (for images composed of
-pixels) generic paint programs or (for drawings) some widely available
-drawing editor, and that is suitable for input to text formatters or
-for automatic translation to a variety of formats suitable for input
-to text formatters.  A copy made in an otherwise Transparent file
-format whose markup, or absence of markup, has been arranged to thwart
-or discourage subsequent modification by readers is not Transparent.
-An image format is not Transparent if used for any substantial amount
-of text.  A copy that is not ``Transparent'' is called ``Opaque''.
-
-Examples of suitable formats for Transparent copies include plain
-ASCII without markup, Texinfo input format, La@TeX{} input
-format, SGML or XML using a publicly available
-DTD, and standard-conforming simple HTML,
-PostScript or PDF designed for human modification.  Examples
-of transparent image formats include PNG, XCF and
-JPG.  Opaque formats include proprietary formats that can be
-read and edited only by proprietary word processors, SGML or
-XML for which the DTD and/or processing tools are
-not generally available, and the machine-generated HTML,
-PostScript or PDF produced by some word processors for
-output purposes only.
-
-The ``Title Page'' means, for a printed book, the title page itself,
-plus such following pages as are needed to hold, legibly, the material
-this License requires to appear in the title page.  For works in
-formats which do not have any title page as such, ``Title Page'' means
-the text near the most prominent appearance of the work's title,
-preceding the beginning of the body of the text.
-
-The ``publisher'' means any person or entity that distributes copies
-of the Document to the public.
-
-A section ``Entitled XYZ'' means a named subunit of the Document whose
-title either is precisely XYZ or contains XYZ in parentheses following
-text that translates XYZ in another language.  (Here XYZ stands for a
-specific section name mentioned below, such as ``Acknowledgements'',
-``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve the Title''
-of such a section when you modify the Document means that it remains a
-section ``Entitled XYZ'' according to this definition.
-
-The Document may include Warranty Disclaimers next to the notice which
-states that this License applies to the Document.  These Warranty
-Disclaimers are considered to be included by reference in this
-License, but only as regards disclaiming warranties: any other
-implication that these Warranty Disclaimers may have is void and has
-no effect on the meaning of this License.
-
-@item
-VERBATIM COPYING
-
-You may copy and distribute the Document in any medium, either
-commercially or noncommercially, provided that this License, the
-copyright notices, and the license notice saying this License applies
-to the Document are reproduced in all copies, and that you add no other
-conditions whatsoever to those of this License.  You may not use
-technical measures to obstruct or control the reading or further
-copying of the copies you make or distribute.  However, you may accept
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diff --git a/doc/man/bus-broadcast.1 b/doc/man/bus-broadcast.1
deleted file mode 100644
index a4dc76c..0000000
--- a/doc/man/bus-broadcast.1
+++ /dev/null
@@ -1,35 +0,0 @@
-.TH BUS-BROADCAST 1 BUS-%VERSION%
-.SH NAME
-bus broadcast - Broadcast a message on a bus
-.SH SYNOPSIS
-.B bus broadcast
-.IR [options]
-[--]
-.IR pathname
-.IR message
-.SH DESCRIPTION
-Broadcast \fImessage\fP on the bus associated with \fIpathname\fP.
-.SH OPTIONS
-.TP
-.B \-n
-Fail if another process is attempting to broadcast on the bus.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus (5)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-chgrp.1 b/doc/man/bus-chgrp.1
deleted file mode 100644
index d825e32..0000000
--- a/doc/man/bus-chgrp.1
+++ /dev/null
@@ -1,38 +0,0 @@
-.TH BUS-CHGRP 1 BUS-%VERSION%
-.SH NAME
-bus chgrp - Change group ownership of a bus
-.SH SYNOPSIS
-.B bus chgrp
-[--]
-.IR group
-.IR pathname
-.SH DESCRIPTION
-Change the group, that owns a bus with an associated \fIpathname\fP,
-to the specified \fIgroup\fP.  The \fIgroup\fP can be specified either
-with a GID or with a group name.
-.PP
-The current ownership of a bus can be retrieved by running
-.BR stat (1)
-over the \fIpathname\fP of the bus.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus-chown (1),
-.BR bus-chmod (1),
-.BR stat (1)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-chmod.1 b/doc/man/bus-chmod.1
deleted file mode 100644
index 3a44423..0000000
--- a/doc/man/bus-chmod.1
+++ /dev/null
@@ -1,49 +0,0 @@
-.TH BUS-CHMOD 1 BUS-%VERSION%
-.SH NAME
-bus chmod - Change permissions on a bus
-.SH SYNOPSIS
-.B bus chmod
-[--]
-.IR permissions
-.IR pathname
-.SH DESCRIPTION
-Change who have access to a bus with an associated \fIpathname\fP.
-In the \fIpermissions\fP, the owner, the group, and others (not
-in group) are represented by the symbols \fBu\fP, \fBg\fP, and
-\fBo\fP, respectively.  The \fIpermissions\fP string is imagined
-to have always be prefixed with an \fB=\fP.  This symbols means
-that all user classes list after it, and only those classes, as
-permission to use the bus.  Similarly the symbols \fB+\fP and
-\fB\-\fP can be used to grant and revoke access, respectively.
-The symbols \fB=\fP, \fB+\fP, and \fB\-\fP can be mixed, and are
-interpreted from left to right.  Alternatively the \fIpermissions\fP
-string can be a octal number, where the owner is represented by any
-bit in 700 (100, 200, or 400, or any combination thereof), the
-group is represented by any bit in 70, and others (not in the group)
-is represented by any bit in 7.
-.PP
-The current permissions of a bus can be retrieved by running
-.BR stat (1)
-over the \fIpathname\fP of the bus.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus-chown (1),
-.BR bus-chgrp (1),
-.BR stat (1)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-chown.1 b/doc/man/bus-chown.1
deleted file mode 100644
index 24487a1..0000000
--- a/doc/man/bus-chown.1
+++ /dev/null
@@ -1,41 +0,0 @@
-.TH BUS-CHOWN 1 BUS-%VERSION%
-.SH NAME
-bus chown - Change ownership of a bus
-.SH SYNOPSIS
-.B bus chown
-[--]
-.IR owner[:group]
-.IR pathname
-.SH DESCRIPTION
-Change the owner, that owns a bus with an associated \fIpathname\fP,
-to the specified \fIowner\fP. The \fIowner\fP can be specified either
-with a UID or with a user name.  If a \fIgroup\fP is specified, the
-bus's owner-group will be set to that \fIgroup\fP, otherwise the group
-will remain unchanged.  The \fIgroup\fP can be specified either with
-a GID or with a group name.
-.PP
-The current ownership of a bus can be retrieved by running
-.BR stat (1)
-over the \fIpathname\fP of the bus.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus-chgrp (1),
-.BR bus-chmod (1),
-.BR stat (1)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-create.1 b/doc/man/bus-create.1
deleted file mode 100644
index 91041cf..0000000
--- a/doc/man/bus-create.1
+++ /dev/null
@@ -1,37 +0,0 @@
-.TH BUS-CREATE 1 BUS-%VERSION%
-.SH NAME
-bus create - Create a bus
-.SH SYNOPSIS
-.B bus create
-.IR [options]
-[--]
-.IR [pathname]
-.SH DESCRIPTION
-Create a bus with an associated \fIpathname\fP.  If \fIpathname\fP
-is omitted, a random pathname in \fI$XDG_RUNTIME_DIR/bus\fP will be
-created and printed to stdout.
-.SH OPTIONS
-.TP
-.B \-x
-Fail if the \fIpathname\fP already exists.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus (5),
-.BR bus-remove (1)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-listen.1 b/doc/man/bus-listen.1
deleted file mode 100644
index 4977ce5..0000000
--- a/doc/man/bus-listen.1
+++ /dev/null
@@ -1,32 +0,0 @@
-.TH BUS-LISTEN 1 BUS-%VERSION%
-.SH NAME
-bus listen - Listen for new messages on a bus
-.SH SYNOPSIS
-.B bus listen
-[--]
-.IR pathname
-.IR command
-.SH DESCRIPTION
-Listen for new messages on the bus associated with \fIpathname\fP.  Once
-a message is received, \fIcommand\fP will be spawned with \fI$msg\fP set
-to the received message.  POSIX shell syntax applies to \fIcommand\fP.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus (5)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-remove.1 b/doc/man/bus-remove.1
deleted file mode 100644
index 95e805c..0000000
--- a/doc/man/bus-remove.1
+++ /dev/null
@@ -1,29 +0,0 @@
-.TH BUS-REMOVE 1 BUS-%VERSION%
-.SH NAME
-bus remove - Remove a bus
-.SH SYNOPSIS
-.B bus remove
-[--]
-.IR pathname
-.SH DESCRIPTION
-Remove the bus associated with \fIpathname\fP.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus (5)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus-wait.1 b/doc/man/bus-wait.1
deleted file mode 100644
index 4231cd0..0000000
--- a/doc/man/bus-wait.1
+++ /dev/null
@@ -1,33 +0,0 @@
-.TH BUS-WAIT 1 BUS-%VERSION%
-.SH NAME
-bus wait - Listen for a new message on a bus
-.SH SYNOPSIS
-.B bus wait
-[--]
-.IR pathname
-.IR command
-.SH DESCRIPTION
-Listen for a new message on the bus associated with \fIpathname\fP, stop
-listening once a message has been received.  Once a message is received,
-\fIcommand\fP will be spawned with \fI$msg\fP set to the received
-message.  POSIX shell syntax applies to \fIcommand\fP.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus (5)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus.1 b/doc/man/bus.1
deleted file mode 100644
index afb3925..0000000
--- a/doc/man/bus.1
+++ /dev/null
@@ -1,77 +0,0 @@
-.TH BUS 1 BUS-%VERSION%
-.SH NAME
-bus - A simple daemonless system for broadcasting messages locally
-.SH SYNOPSIS
-.B bus
-.IR command
-.IR argument\ ...
-.SH COMMANDS
-.TP
-.B create
-Create a bus, see
-.BR bus-create (1)
-for further details.
-.TP
-.B remove
-Remove a bus, see
-.BR bus-remove (1)
-for further details.
-.TP
-.B listen
-Listen for new message on a bus, see
-.BR bus-listen (1)
-for further details.
-.TP
-.B wait
-Listen for one new message only on a bus, see
-.BR bus-wait (1)
-for further details.
-.TP
-.B broadcast
-Broadcast a message on a bus, see
-.BR bus-broadcast (1)
-for further details.
-.TP
-.B chmod
-Change permissions on a bus, see
-.BR bus-chmod (1)
-for further details.
-.TP
-.B chown
-Change ownership of a bus, see
-.BR bus-chown (1)
-for further details.
-.TP
-.B chgrp
-Change group ownership of a bus, see
-.BR bus-chgrp (1)
-for further details.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.TP
-2
-The command is not recognised.
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus-remove (1),
-.BR bus-listen (1),
-.BR bus-wait (1),
-.BR bus-broadcast (1),
-.BR bus-chmod (1),
-.BR bus-chown (1),
-.BR bus-chgrp (1),
-.BR bus (5),
-.BR libbus (7)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus.5 b/doc/man/bus.5
deleted file mode 100644
index 0a5de7e..0000000
--- a/doc/man/bus.5
+++ /dev/null
@@ -1,50 +0,0 @@
-.TH BUS 5 BUS-%VERSION%
-.SH NAME
-bus - A simple daemonless system for broadcasting messages locally
-.SH DESCRIPTION
-\fBbus\fP is a simple interprocess communication system for broadcasting
-messages to other processes on the same machine.  \fBbus\fP does not use
-any daemon.  Instead, all communication and synchronisation is managed
-using System V (XSI) semaphores and System V (XSI) shared memory.
-.PP
-The command \fBbus create\fP can be used to create new buses.  By
-convention, buses should be stored in \fI$XDG_RUNTIME_DIR/bus\fP, this is
-what \fBbus create\fP does if no pathname is given.  The pathname of the
-bus should be tracked using \fIBUS_X\fP, where \fIX\fP is replaced with
-either:
-.TP
-.B GENERIC
-For the bus used in generic cases. That is all but the cases of the
-buses listed below.
-.TP
-.B AUDIO
-For the bus used in with the audio subsystem is involved.
-.TP
-.B VIDEO
-For the bus used in with the video subsystem is involved.
-.TP
-.B INPUT
-For the bus used in with the input subsystem is involved.
-.TP
-.B FILES
-For the bus used in with the storage subsystem is involved.
-.PP
-Messages broadcasted on a bus cannot be longer than 2047 bytes,
-excluding NULL termination.  Message should be encoded in UTF-8,
-and most not contain the NULL character.
-.PP
-Broadcasted message should start with the process ID, or 0 if ephemeral,
-whence the message originated, followed by a single regular space.
-.SH SEE ALSO
-.BR bus (1),
-.BR libbus (7),
-.BR semop (2),
-.BR shmop (2)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_chmod.3 b/doc/man/bus_chmod.3
deleted file mode 100644
index c2ac3f9..0000000
--- a/doc/man/bus_chmod.3
+++ /dev/null
@@ -1,64 +0,0 @@
-.TH BUS_CHMOD 3 BUS-%VERSION%
-.SH NAME
-bus_chmod - Change bus mode bits
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_chmod(const char *\fIfile\fP, mode_t \fImode\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_chmod ()
-function gives access to the bus associated with \fIfile\fP
-according to the following rules:
-.TP
-*
-If (\fImode\fP &S_IRWXU) the owner should be given full access to the
-bus.  Otherwise the owner should have no access.
-.TP
-*
-If (\fImode\fP &S_IRWXG) the group should be given read and write
-access to the bus.  Otherwise the group should have no access.
-.TP
-*
-If (\fImode\fP &S_IRWXO) others (except the group) should be given
-read and write access to the bus.  Otherwise others should have no
-access.
-.PP
-The current permissions of a bus can be retrieved by running
-.BR stat (3)
-over the \fIpathname\fP of the bus.
-.SH RETURN VALUES
-Upon successful completion, the function returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-The
-.BR bus_chown (3)
-function may fail and set \fIerrno\fP to any of the
-errors specified for
-.BR bus_open (3),
-.BR chmod (3),
-.BR semget (3),
-.BR shmget (3)
-and
-.BR shmctl (3)
-as well as any errors specified for the \fIIPC_STAT\fP and
-\fIIPC_SET\fP commands for
-.BR semctl (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_read (3),
-.BR stat (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_chown.3 b/doc/man/bus_chown.3
deleted file mode 100644
index c047d83..0000000
--- a/doc/man/bus_chown.3
+++ /dev/null
@@ -1,51 +0,0 @@
-.TH BUS_CHOWN 3 BUS-%VERSION%
-.SH NAME
-bus_chown - Change bus owner and group
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_chown(const char *\fIfile\fP, uid_t \fIowner\fP, gid_t \fIgroup\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_chown ()
-function changes the owner and the group of the bus associated with
-\fIfile\fP to the \fIowner\fP and \fIgroup\fP, respectively.
-.PP
-The current ownership of a bus can be retrieved by running
-.BR stat (3)
-over the \fIpathname\fP of the bus.
-.SH RETURN VALUES
-Upon successful completion, the function returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-The
-.BR bus_chown (3)
-function may fail and set \fIerrno\fP to any of the
-errors specified for
-.BR bus_open (3),
-.BR chown (3),
-.BR semget (3),
-.BR shmget (3)
-and
-.BR shmctl (3)
-as well as any errors specified for the \fIIPC_STAT\fP and
-\fIIPC_SET\fP commands for
-.BR semctl (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_read (3),
-.BR stat (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_close.3 b/doc/man/bus_close.3
deleted file mode 100644
index dc35e6b..0000000
--- a/doc/man/bus_close.3
+++ /dev/null
@@ -1,36 +0,0 @@
-.TH BUS_CLOSE 3 BUS-%VERSION%
-.SH NAME
-bus_close - Close a bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_close(bus_t *\fIbus\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_close ()
-function disposes of resources allocated to the process, as referenced
-in the \fIbus\fP argument.
-.SH RETURN VALUES
-Upon successful completion, the function returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-.TP
-.B EINVAL
-The bus does not exist.
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_unlink (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_create.3 b/doc/man/bus_create.3
deleted file mode 100644
index 88e6efe..0000000
--- a/doc/man/bus_create.3
+++ /dev/null
@@ -1,63 +0,0 @@
-.TH BUS_CREATE 3 BUS-%VERSION%
-.SH NAME
-bus_create - Create a new bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_create(const char *\fIfile\fP, int \fIflags\fP, char **\fIout_file\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_create ()
-function creates a bus with the asscoiated pathname specifed by the
-value of the parameter \fIfile\fP.  If \fIfile\fP is \fINULL\fP a random
-pathname is selected.  This pathname adheres to the convention set forth
-by
-.BR bus (5).
-.PP
-If \fIfile\fP is not \fINULL\fP the
-.BR bus_create ()
-function fails if the file already exists if \fIflags\fP contains
-\fIBUS_EXCL\fP.  Otherwise if \fIfile\fP is not \fINULL\fP, the
-.BR bus_create ()
-function does nothing if the file already exists.
-.PP
-If \fIflags\fP contains \fIBUS_INTR\fP, the function fails if it is
-interrupted.
-.PP
-Unless \fIout_file\fP is \fINULL\fP, the pathname of the bus should be
-stored in a new char array stored in \fI*out_file\fP.  The caller must
-free the allocated stored in \fI*out_file\fP.
-.SH RETURN VALUES
-Upon successful completion, the function returns 0.  Otherwise the
-function return -1 with \fIerrno\fP set to indicate the error.
-.SH ERRORS
-.TP
-.B ENOMEM
-The process cannot allocate more memory.
-.PP
-The
-.BR bus_create (3)
-function may also fail and set \fIerrno\fP to any
-of the errors specified for the routines
-.BR open (2)
-and
-.BR write (2).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_unlink (3),
-.BR bus_open (3),
-.BR open (2),
-.BR write (2)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_open.3 b/doc/man/bus_open.3
deleted file mode 100644
index 683ae9b..0000000
--- a/doc/man/bus_open.3
+++ /dev/null
@@ -1,67 +0,0 @@
-.TH BUS_OPEN 3 BUS-%VERSION%
-.SH NAME
-bus_open - Open a bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_open(bus_t *\fIbus\fP, const char *\fIfile\fP, int \fIflags\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_open ()
-function acquires resources required for the process to use the bus
-associated with the filename stored in \fIfile\fP.  The function also
-stores the resources in \fIbus\fP for use by other
-.BR bus
-functions.
-.PP
-Values for \fIflags\fP are constructed by a bitwise inclusive OR of
-flags from the following list.
-.TP
-.B BUS_RDONLY
-The process will only be using the bus for receiving messages.
-.TP
-.B BUS_WRONLY
-The process will only be using the bus for sending messages.
-.TP
-.B BUS_RDWR
-The process will use the bus for both receiving and sending messages.
-.SH RETURN VALUES
-Upon successful completion the function returns 0.  Otherwise the
-function returns -1 and set \fIerrno\fP to indicate the error.
-.SH ERRORS
-.TP
-.B ENOMEM
-The process cannot allocate more memory.
-.TP
-.B EACCES
-Operation permission is denied to the calling process.
-.TP
-.B EINVAL
-The described bus does not exist.
-.PP
-The
-.BR bus_open ()
-function may also fail and set \fIerrno\fP to any of the errors
-specified for the routine
-.BR open (2).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_close (3),
-.BR bus_unlink (3),
-.BR bus_write (3),
-.BR bus_read (3),
-.BR bus_poll (3),
-.BR open (2)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_poll.3 b/doc/man/bus_poll.3
deleted file mode 100644
index 95271ca..0000000
--- a/doc/man/bus_poll.3
+++ /dev/null
@@ -1,87 +0,0 @@
-.TH BUS_POLL 3 BUS-%VERSION%
-.SH NAME
-bus_poll_start, bus_poll_stop, bus_poll, bus_poll_timed - Wait a message to be broadcasted
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_poll_start(bus_t *\fIbus\fP);
-int bus_poll_stop(const bus_t *\fIbus\fP);
-const char *bus_poll(bus_t *\fIbus\fP, int \fIflags\fP);
-const char *bus_poll_timed(bus_t *\fIbus\fP, const struct timespec *\fItimeout\fP, clockid_t \fIclockid\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_poll ()
-function waits for a message to be broadcasted on the \fIbus\fP, and return
-the message it receives.  The function fails if (\fIflags\fP &BUS_NOWAIT)
-and there is not already a message waiting on the bus.  Received messages
-shall be copied and parsed, and acted upon, in a separate thread, and
-.BR bus_poll ()
-or
-.BR bus_poll_stop ()
-called again as soon as possible.
-.PP
-The
-.BR bus_poll_start ()
-funcion must be called before
-.BR bus_poll ()
-is called for the first time.  When the process is done listening on the
-bus it must call the
-.BR bus_poll_stop ()
-function.
-.PP
-The
-.BR bus_poll_timed ()
-function behaves like
-.BR bus_poll (),
-except if it is not able to read a message within the specified time,
-it will fail and set \fIerrno\fP to \fBEAGAIN\fP.  The time is specified
-as an absolute time using the parameter \fItimeout\fP.  The behaviour is
-unspecified if \fItimeout\fP is \fINULL\fP. \fItimeout\fP is measured
-with the clock whose ID is specified by the \fIclockid\fP parameter.  This
-clock must be a predicitable clock.
-.SH RETURN VALUES
-Upon successful completion, the functions
-.BR bus_poll_start ()
-and
-.BR bus_poll_stop ()
-returns 0.  Otherwise the functions returns -1 and sets \fIerrno\fP to
-indicate the error.
-.PP
-Upon successful completion, the functions
-.BR bus_poll ()
-and
-.BR bus_poll_timed ()
-returns the received message.  Otherwise the function returns \fINULL\fP
-and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-The
-.BR bus_poll (3),
-.BR bus_poll_start (3)
-and
-.BR bus_poll_stop (3)
-functions may fail and set \fIerrno\fP to any of the errors specified for
-.BR semop (3).
-The
-.BR bus_poll_timed (3)
-function may also set \fIerrno\fP to any of the errors specified for
-.BR clock_gettime (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_write (3),
-.BR bus_read (3),
-.BR semop (3),
-.BR clock_gettime (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_read.3 b/doc/man/bus_read.3
deleted file mode 100644
index 1caadfb..0000000
--- a/doc/man/bus_read.3
+++ /dev/null
@@ -1,79 +0,0 @@
-.TH BUS_READ 3 BUS-%VERSION%
-.SH NAME
-bus_read, bus_read_timed - Listen for new messages a bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_read(const bus_t *\fIbus\fP, int (*\fIcallback\fP)(const char *\fImessage\fP, void *\fIuser_data\fP),
-             void *\fIuser_data\fP);
-int bus_read_timed(const bus_t *\fIbus\fP, int (*\fIcallback\fP)(const char *\fImessage\fP, void *\fIuser_data\fP),
-                   void *\fIuser_data\fP, const struct timespec *\fItimeout\fP, clockid_t \fIclockid\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_read ()
-function waits for new message to be sent on the bus specified in
-\fIbus\fP, as provieded by a previous call to the
-.BR bus_open ()
-function.  Once a message is received, the \fIcallback\fP function is
-invoked.  The \fImessage\fP argument to the callback is the received
-message, and \fIuser_data\fP for \fIcallback\fP should be
-\fIuser_data\fP from
-.BR bus_read ().
-However, once
-.BR bus_read ()
-has ensured that it will receive any message sent on the bus, it shall
-invoke the \fIcallback\fP function with \fImessage\fP set to \fINULL\fP,
-to notify the process that it can perform any action that requires that
-it is listening on the bus.
-.PP
-After \fIcallback\fP returns, \fImessage\fP may be override.  Therefore
-\fIcallback\fP should copy \fImessage\fP and start a new thread that
-uses the copy of \fImessage\fP.  \fIcallback\fP shall return -1 on
-failure, 0 if
-.BR bus_read ()
-should stop listening or 1 if
-.BR bus_read ()
-should continue listening.
-.PP
-The
-.BR bus_read_timed ()
-function behaves like
-.BR bus_read (),
-except it will automatically fail and set \fIerrno\fP to \fBEAGAIN\fP
-when the specified time has passed. The time is specified as an
-absolute time using the parameter \fItimeout\fP.  The behaviour is
-unspecified if \fItimeout\fP is \fINULL\fP.  \fItimeout\fP is measured
-with the clock whose ID is specified by the \fIclockid\fP parameter.
-This clock must be a predicitable clock.
-.SH RETURN VALUES
-Upon successful completion, these functions returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-The
-.BR bus_read (3)
-function may fail and set \fIerrno\fP to any of the errors specified for
-.BR semop (3).
-The
-.BR bus_read_timed (3)
-function may also set \fIerrno\fP to any of the errors specified for
-.BR clock_gettime (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_write (3),
-.BR bus_poll (3),
-.BR semop (3),
-.BR clock_gettime (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_unlink.3 b/doc/man/bus_unlink.3
deleted file mode 100644
index 83ec760..0000000
--- a/doc/man/bus_unlink.3
+++ /dev/null
@@ -1,56 +0,0 @@
-.TH BUS_UNLINK 3 BUS-%VERSION%
-.SH NAME
-bus_unlink - Remove a bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_unlink(const char *\fIfile\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_unlink ()
-function removes the bus assoicated with the pathname stored in
-\fIfile\fP.  The function also unlinks the file.
-.SH RETURN VALUES
-Upon successful completion, the function returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-.TP
-.B EINVAL
-The bus does not exist.
-.TP
-.B EACCES
-Operation permission is denied to the calling process.
-.TP
-.B EPERM
-The user does not have permission to remove the bus.
-.PP
-The
-.BR bus_unlink (3)
-function may also fail and set \fIerrno\fP to any of the errors
-specified for the routines
-.BR unlink (2),
-.BR open (2),
-.BR semget (3)
-and
-.BR shmget (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_create (3),
-.BR bus_close (3),
-.BR unlink (2),
-.BR open (2),
-.BR semget (3),
-.BR shmget (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/bus_write.3 b/doc/man/bus_write.3
deleted file mode 100644
index 4513c29..0000000
--- a/doc/man/bus_write.3
+++ /dev/null
@@ -1,64 +0,0 @@
-.TH BUS_WRITE 3 BUS-%VERSION%
-.SH NAME
-bus_write, bus_write_timed - Broadcast a message a bus
-.SH SYNOPSIS
-.LP
-.nf
-#include <bus.h>
-.P
-int bus_write(const bus_t *\fIbus\fP, const char *\fImessage\fP, int \fIflags\fP);
-int bus_write_timed(const bus_t *\fIbus\fP, const char *\fImessage\fP,
-                    const struct timespec *\fItimeout\fP, clockid_t \fIclockid\fP);
-.fi
-.SH DESCRIPTION
-The
-.BR bus_write ()
-function broadcasts a message on the bus whose information is stored in
-\fIbus\fP.  The message read by the function is stored in the parameter
-\fImessage\fP.  It may not exceeed 2048 bytes, including NULL termination.
-.PP
-The
-.BR bus_write ()
-function shall fail, and set \fIerrno\fP to \fIEAGAIN\fP, if the call
-would suspend the process and (\fIflags\fP &BUS_NOWAIT).
-.PP
-The
-.BR bus_write_timed ()
-function behaves like
-.BR bus_write (),
-except if it is not able to write the \fImessage\fP within the specified
-time, it will fail and set \fIerrno\fP to \fBEAGAIN\fP.  The time is
-specified as an absolute time using the parameter \fItimeout\fP.  The
-behaviour is unspecified if \fItimeout\fP is \fINULL\fP. \fItimeout\fP
-is measured with the clock whose ID is specified by the \fIclockid\fP
-parameter.  This clock must be a predicitable clock.
-.SH RETURN VALUES
-Upon successful completion, these functions returns 0.  Otherwise the
-function returns -1 and sets \fIerrno\fP to indicate the error.
-.SH ERRORS
-The
-.BR bus_write (3)
-function may fail and set \fIerrno\fP to any of the errors specified for
-.BR semop (3).
-The
-.BR bus_write_timed (3)
-function may also set \fIerrno\fP to any of the errors specified for
-.BR clock_gettime (3).
-.SH SEE ALSO
-.BR bus-create (1),
-.BR bus (5),
-.BR libbus (7),
-.BR bus_open (3),
-.BR bus_read (3),
-.BR bus_poll (3),
-.BR bus_chown (3),
-.BR bus_chmod (3),
-.BR clock_gettime (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/man/libbus.7 b/doc/man/libbus.7
deleted file mode 100644
index 804ee97..0000000
--- a/doc/man/libbus.7
+++ /dev/null
@@ -1,39 +0,0 @@
-.TH LIBBUS 7 BUS-%VERSION%
-.SH NAME
-libbus - A simple daemonless system for broadcasting messages locally
-.SH DESCRIPTION
-.BR bus
-is a stupid-simple, thrilless, daemonless interprocess communication
-system for broadcasting messages.
-.SH RATIONALE
-We need an interprocess communication system similar to message queues.
-But we need broadcasting rather than anycasting, so we have a fast,
-simple and daemonless system for announcing events to any processes that
-might be interested.
-.SH FUTURE DIRECTION
-None.
-.SH SEE ALSO
-.BR bus (1),
-.BR bus (5),
-.BR bus_create (3),
-.BR bus_unlink (3),
-.BR bus_open (3),
-.BR bus_close (3),
-.BR bus_write (3),
-.BR bus_write_timed (3),
-.BR bus_read (3),
-.BR bus_read_timed (3),
-.BR bus_poll_start (3),
-.BR bus_poll_stop (3),
-.BR bus_poll (3),
-.BR bus_poll_timed (3),
-.BR bus_chown (3),
-.BR bus_chmod (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the LICENSE file for the full
-list of authors.
-.SH LICENSE
-MIT/X Consortium License.
-.SH BUGS
-Please report bugs to https://github.com/maandree/bus/issues or to
-maandree@member.fsf.org
diff --git a/doc/protocol b/doc/protocol
index f45799e..116c1b2 100644
--- a/doc/protocol
+++ b/doc/protocol
@@ -45,4 +45,3 @@ and `V(a)` is done when exiting the scope. It also means that
 these actions [P(a) and V(a)] are undone when the process exits,
 or if the call fails.
 `with V(a)` is to `V(a)` as `with P(a)` is to `P(a)`.
-