> On 07/16/2012 08:06 PM, Dietmar Maurer wrote:
> > This is useful for init.d scripts.
>
> What is use case for this option?
For example, here is a init.d script for debian:
#!/bin/sh
### BEGIN INIT INFO
# Provides: sheepdog
# Required-Start: $network $remote_fs $syslog
# Required-Stop: $network $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Sheepdog server
# Description: Sheepdog server
### END INIT INFO
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Sheepdog Server" # Introduce a short description here
NAME=sheepdog # Introduce the short server's name here
DAEMON=/usr/sbin/sheep # Introduce the server's location here
SCRIPTNAME=/etc/init.d/$NAME
# Exit if the package is not installed
[ -x $DAEMON ] || exit 0
# Defaults
SHEEPDOG_START_SEQUENCE="_1"
SHEEPDOG_DEAMON_ARGS_1=""
SHEEPDOG_PATH_1="/var/lib/sheepdog/disc1"
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
if [ "$START" != "yes" ]; then
exit 0
fi
. /lib/lsb/init-functions
status()
{
pid=$(pidof $1 2>/dev/null)
rtrn=$?
if [ $rtrn -ne 0 ]; then
echo "$1 is stopped"
else
echo "$1 (pid $pid) is running..."
fi
return $rtrn
}
#
# Function that starts the daemon/service
#
do_start()
{
mkdir -p /var/run
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
for SHEEP in $SHEEPDOG_START_SEQUENCE; do
eval DAEMON_ARGS=\$SHEEPDOG_DEAMON_ARGS$SHEEP
eval SHEEPDOG_PATH=\$SHEEPDOG_PATH$SHEEP
eval PIDFILE=/var/run/$NAME$SHEEP.pid
mkdir -p $SHEEPDOG_PATH
status_of_proc -p ${PIDFILE} $DAEMON "$NAME" >/dev/null &&
continue
start-stop-daemon --start --quiet --pidfile ${PIDFILE} --exec
$DAEMON -- --pidfile ${PIDFILE} $DAEMON_ARGS $SHEEPDOG_PATH || return 2
done
return 0
}
#
# Function that stops the daemon/service
#
do_stop()
{
# 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
RETVAL=0
for SHEEP in $SHEEPDOG_START_SEQUENCE; do
eval DAEMON_ARGS=\$SHEEPDOG_DEAMON_ARGS$SHEEP
eval SHEEPDOG_PATH=\$SHEEPDOG_PATH$SHEEP
eval PIDFILE=/var/run/$NAME$SHEEP.pid
start-stop-daemon --stop --oknodo --retry=TERM/20/KILL/5
--quiet --pidfile ${PIDFILE} --exec $DAEMON || RETVAL=2
done
return "$RETVAL"
}
case "$1" in
start)
log_daemon_msg "Starting $DESC " "$NAME"
do_start
case "$?" in
0|1) log_end_msg 0 ;;
2) log_end_msg 1 ;;
esac
;;
stop)
log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0|1) log_end_msg 0 ;;
2) log_end_msg 1 ;;
esac
;;
status)
for SHEEP in $SHEEPDOG_START_SEQUENCE; do
eval DAEMON_ARGS=\$SHEEPDOG_DEAMON_ARGS$SHEEP
eval SHEEPDOG_PATH=\$SHEEPDOG_PATH$SHEEP
eval PIDFILE=/var/run/$NAME$SHEEP.pid
status_of_proc -p ${PIDFILE} $DAEMON "$NAME${SHEEP}" || exit $?
done
;;
restart|force-reload)
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|status|restart|force-reload}" >&2
exit 3
;;
esac
:
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