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#! /bin/sh
### BEGIN INIT INFO
# Provides: emacs
# Default-Start: 2 3 4 5
# Default-Stop: S 0 1 6
# Description: This file should be placed in /etc/init.d.
### END INIT INFO
#change this
#USERNAME=YourUserName
USERNAME=`id 1000 -un`
eval USERHOME=~$USERNAME
DESC="Run the emacs daemon."
NAME=emacs
#change this
#DAEMON=/opt/emacs23/bin/$NAME
DAEMON=`which emacs`
DAEMON_ARGS="--daemon"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
#change this
#EMACSCLIENT=/opt/emacs23/bin/emacsclient
EMACSCLIENT=`which emacsclient`
EVALEXIT="(progn (kill-emacs))"
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
#
# Function that starts the daemon/service
#
do_start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
start-stop-daemon -c $USERNAME -d $USERHOME --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
|| return 1
start-stop-daemon -c $USERNAME -d $USERHOME --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
$DAEMON_ARGS \
|| return 2
# Add code here, if necessary, that waits for the process to be ready
# to handle requests from services started subsequently which depend
# on this one. As a last resort, sleep for some time.
}
#
# Function that stops the daemon/service
#
do_stop()
{
$EMACSCLIENT --eval "$EVALEXIT"
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2
# Wait for children to finish too if this is a daemon that forks
# and if the daemon is only ever run from this initscript.
# If the above conditions are not satisfied then add some other code
# that waits for the process to drop all resources that could be
# needed by services started subsequently. A last resort is to
# sleep for some time.
start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
return "$RETVAL"
}
#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
#
# If the daemon can reload its configuration without
# restarting (for example, when it is sent a SIGHUP),
# then implement that here.
#
start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
return 0
}
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
#reload|force-reload)
#
# If do_reload() is not implemented then leave this commented out
# and leave 'force-reload' as an alias for 'restart'.
#
#log_daemon_msg "Reloading $DESC" "$NAME"
#do_reload
#log_end_msg $?
#;;
restart|force-reload)
#
# If the "reload" option is implemented then remove the
# 'force-reload' alias
#
log_daemon_msg "Restarting $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;; # Old process is still running
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
*)
#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
exit 3
;;
esac
:
I use also this start script placed in /usr/bin/emacs
#!/bin/bash USERID=`id -u` if [ ! -e /tmp/emacs$USERID/server ] then echo "Starting server." /etc/init.d/emacs start while [ ! -e "/tmp/emacs$USERID/server" ] ; do sleep 1 ; done fi emacsclient -c "$@"
Since start-stop-daemon needs root should they be sudo calls? Otherwise surely on root can run emacs in this way!
You should rather change the variables in /etc/default/emacs, this is how other init scripts work. You could extend the script to start daemons for several users, e.g. by looking for a .start-emacs-daemon file in their home directories. But then, the init script wouldn’t make much sense on a system with multiple users, anyway: such a computer should never get powered off, so the init script will not run, anyway. A better solution would be to start the daemon lazily: just create a wrapper around emacsclient, starting the daemon if it isn’t already running. – AnselmHelbig
several bugs
user command on my debian machine, better replace USERID=`user -u $USER` with USERID=`id -u` and remove the previous line.start-stop-daemon is in /sbin which is not in default $PATH, better add PATH=/usr/sbin:/usr/bin:/sbin:/bin below the line . /lib/lsb/init-functionsstart-stop-daemon: Unable to chdir() to ~username (No such file or directory) emacsclient “$@” return $?After fixing all these, I still can’t stop the daemon, sudo /etc/init.d/emacs stop gives
/usr/bin/emacsclient: can't find socket; have you started the server? To start the server in Emacs, type "M-x server-start". /usr/bin/emacsclient: No socket or alternate editor. Please use: --socket-name --server-file (or environment variable EMACS_SERVER_FILE) --alternate-editor (or environment variable ALTERNATE_EDITOR)
Fixed: I was able to use sudo /etc/init.d/emacs stop to stop the daemon with the above init script after replacing
$EMACSCLIENT --eval "$EVALEXIT"
in the do_stop() function with
su -c "$EMACSCLIENT --eval \"$EVALEXIT\"" $USERNAME
The problem was that root didn’t have an emacs server running. It worked fine when running /etc/init.d/emacs stop as $USERNAME, but it would have failed during shutdown. --JasonBlevins
Several more bugs
(user-login-name) returns “root”. I have a working hack, but it’s probably not very advisable: I’ve changed the DAEMON and DAEMON_ARGS variables to run emacs using su allowing me to specify the -l switch to su:DAEMON=/bin/su
DAEMON_ARGS="${USERNAME} -l -c emacs -- -daemon -u ${USERNAME}"
And start-stop-daemon should be executed without the -c $USERNAME switch.