sample startup script
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coming from [[bugs/weird_entry_in_process_list]] - are there plans to make an init.d / systemd .service file for git-annex?
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my use case is that i have dedicated machines that will sync a common directory. they will run only one assistant - would patches to make a `git-annex` user, and the associated startup scripts, in the debian package be welcome? --[[anarcat]]
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Here's a sample startup script:
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<pre>
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#!/bin/sh
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### BEGIN INIT INFO
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# Provides: gitannex
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# Required-Start: $local_fs $network $remote_fs $syslog
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# Required-Stop: $local_fs $network $remote_fs $syslog
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: start the git-annex assistant
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# Description: start the git-annex assistant in the given directory
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### END INIT INFO
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# Author: Antoine Beaupré <anarcat@koumbit.org>
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# Do NOT "set -e"
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# PATH should only include /usr/* if it runs after the mountnfs.sh script
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PATH=/sbin:/usr/sbin:/bin:/usr/bin
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DESC="gitannex"
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NAME=gitannex
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USER=$NAME
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DAEMON=git-annex
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DAEMON_ARGS="assistant"
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PIDFILE=/var/run/$NAME.pid
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SCRIPTNAME=/etc/init.d/$NAME
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ANNEX=auto
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# Read configuration variable file if it is present
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[ -r /etc/default/$NAME ] && . /etc/default/$NAME
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# Exit if the package is not installed
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[ -x "$DAEMON" ] || exit 0
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# Load the VERBOSE setting and other rcS variables
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. /lib/init/vars.sh
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
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# and status_of_proc is working.
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. /lib/lsb/init-functions
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if [ "$ANNEX" = "auto" ]; then
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DAEMON_ARGS="$DAEMON_ARGS --autostart"
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else
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cd $ANNEX
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PIDFILE="$ANNEX/.git/annex/daemon.pid"
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EXTRA_OPTS="--chdir $ANNEX"
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fi
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#
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# Function that starts the daemon/service
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#
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do_start()
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{
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# Return
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# 0 if daemon has been started
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# 1 if daemon was already running
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# 2 if daemon could not be started
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start-stop-daemon --start --quiet --user $USER --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
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|| return 1
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start-stop-daemon --start --quiet --user $USER --chuid $USER $EXTRA_OPTS --pidfile $PIDFILE --exec $DAEMON -- \
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$DAEMON_ARGS \
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|| return 2
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# The above code will not work for interpreted scripts, use the next
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# six lines below instead (Ref: #643337, start-stop-daemon(8) )
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#start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON \
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# --name $NAME --test > /dev/null \
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# || return 1
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#start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON \
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# --name $NAME -- $DAEMON_ARGS \
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# || return 2
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# Add code here, if necessary, that waits for the process to be ready
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# to handle requests from services started subsequently which depend
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# on this one. As a last resort, sleep for some time.
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}
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#
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# Function that stops the daemon/service
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#
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do_stop()
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{
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# Return
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# 0 if daemon has been stopped
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# 1 if daemon was already stopped
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# 2 if daemon could not be stopped
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# other if a failure occurred
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su $USER -c "$DAEMON $DAEMON_ARGS --stop" && return 0
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# Wait for children to finish too if this is a daemon that forks
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# and if the daemon is only ever run from this initscript.
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# If the above conditions are not satisfied then add some other code
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# that waits for the process to drop all resources that could be
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# needed by services started subsequently. A last resort is to
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# sleep for some time.
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start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --user $USER --exec $DAEMON
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[ "$?" = 2 ] && return 2
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# Many daemons don't delete their pidfiles when they exit.
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rm -f $PIDFILE
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return "$RETVAL"
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}
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#
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# Function that sends a SIGHUP to the daemon/service
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#
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do_reload() {
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#
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# If the daemon can reload its configuration without
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# restarting (for example, when it is sent a SIGHUP),
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# then implement that here.
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#
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start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
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return 0
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}
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case "$1" in
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start)
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[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
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do_start
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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;;
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stop)
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[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
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do_stop
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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;;
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status)
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status_of_proc -p "$PIDFILE" "$DAEMON" "$NAME" && exit 0 || exit $?
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;;
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#reload|force-reload)
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#
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# If do_reload() is not implemented then leave this commented out
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# and leave 'force-reload' as an alias for 'restart'.
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#
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#log_daemon_msg "Reloading $DESC" "$NAME"
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#do_reload
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#log_end_msg $?
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#;;
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restart|force-reload)
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#
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# If the "reload" option is implemented then remove the
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# 'force-reload' alias
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#
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log_daemon_msg "Restarting $DESC" "$NAME"
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do_stop
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case "$?" in
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0|1)
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do_start
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case "$?" in
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0) log_end_msg 0 ;;
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1) log_end_msg 1 ;; # Old process is still running
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*) log_end_msg 1 ;; # Failed to start
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esac
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;;
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*)
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# Failed to stop
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log_end_msg 1
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;;
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esac
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;;
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*)
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#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
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echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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exit 3
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;;
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esac
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:
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</pre>
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Now this is not without problems:
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1. it assumes a gitannex user is created outside of the script
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2. it assumes a gitannex repository is created outside of the script and specified in the `/etc/default/gitannex` file (or added to the autostart file)
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3. it is Debian-specific (a proper init script would be POSIX only and/or a `.service` file)
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