glances/docs/init_script

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#! /bin/sh
### BEGIN INIT INFO
# Provides: glances
# Required-Start: $remote_fs $local_fs $network
# Required-Stop: $remote_fs $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Starts and daemonize Glances server
# Description: Starts and daemonize Glances server
### END INIT INFO
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Glances server"
NAME=glances
USER=$NAME
DAEMON="/usr/bin/$NAME"
PIDFILE="/run/$NAME/$NAME.pid"
CONF="/etc/glances/glances.conf"
DAEMON_ARGS="-C $CONF -s"
# Exit if the package is not installed
[ -x "$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
. /lib/init/vars.sh
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions
# Ensure /run/glances is there, cf. Debian policy 9.4.1
# http://www.debian.org/doc/debian-policy/ch-opersys.html#s-fhs-run
if [ ! -d "$(dirname $PIDFILE)" ]; then
mkdir "$(dirname $PIDFILE)"
chown $USER:$USER "$(dirname $PIDFILE)"
chmod 755 "$(dirname $PIDFILE)"
fi
#
# Function that starts the daemon/service
#
do_start()
{
log_daemon_msg "Starting $DESC" "$NAME "
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
[ -e $PIDFILE ] && PID=$(cat "$PIDFILE")
if ( [ -e $PIDFILE ] && ps -p $PID 1>&2 > /dev/null )
then
log_action_end_msg 1 "already running, PID's $PID"
exit 0
elif ( [ -w $PIDFILE ] )
then
log_warning_msg "PID file found while ${NAME} is not running, removing file."
rm $PIDFILE
fi
if [ "$RUN" != "true" ]; then
log_action_msg "Not starting glances: disabled by /etc/default/$NAME".
exit 0
fi
start-stop-daemon --start --chuid $USER --pidfile=$PIDFILE --quiet -m -b --exec $DAEMON -- $DAEMON_ARGS || return 2
[ -e "$PIDFILE" ] && chown $USER $PIDFILE
return 0
}
#
# Function that stops the daemon/service
#
do_stop()
{
log_daemon_msg "Stopping $DESC" "$NAME "
if [ ! -w $PIDFILE ]
then
log_warning_msg "PID file not found"
return 4
fi
start-stop-daemon --stop --oknodo --chuid $USER --pidfile=$PID --user=$USER --pidfile="$PIDFILE" --retry=30 || return 1
/bin/rm -f $PIDFILE
return 0
}
case "$1" in
start)
do_start
case "$?" in
0|1) log_end_msg 0 ;;
2) log_end_msg 1 ;;
esac
;;
stop)
do_stop
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;;
esac
;;
status)
status_of_proc -p "$PIDFILE" "$DAEMON" "$NAME"
;;
restart|force-reload)
do_stop
case "$?" in
0)
log_end_msg 0
do_start
case "$?" in
0) log_end_msg 0 ;;
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
*)
echo "Usage: invoke-rc.d $NAME {start|stop|status|restart|force-reload}" >&2
exit 3
;;
esac