Sample Linux service config for init.d

sample-program

#!/bin/sh

# Put to /usr/bin/sample-program

sleep 600 &
PID="$!"

# Trap is required to kill all child processes when the service is stopped
trap "kill $PID" exit INT TERM KILL TERM

wait

sample-service

#!/bin/bash

# processname: sample-program
# chkconfig: 345 99 5

### BEGIN INIT INFO
# Provides:          sample-service
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Sample service
# Description:       Sample service daemon
### END INIT INFO

# Put to /etc/init.d/sample-service
# Run: chmod +x /etc/init.d/sample-service
# Enable via: chkconfig --add sample-service
# Or via: update-rc.d sample-service defaults
# Manually available via "service start|stop|restart"
# More info here: https://wiki.debian.org/LSBInitScripts

PROG=sample-program
USER=sample-user

PID_FILE=/var/run/${PROG}.pid
LOG_FILE=/var/log/${PROG}.log
SUBSYS_FILE=/var/lock/subsys/${PROG}

start() {
  if [ -f ${PID_FILE} ]; then
    echo "${PROG} is already running"
  else
    touch ${LOG_FILE}
    chown ${USER} ${LOG_FILE}
    su ${USER} -c "nohup ${PROG} > ${LOG_FILE} 2>&1 & echo \$!" > ${PID_FILE}
    touch ${SUBSYS_FILE}
  fi
}

stop() {
  if [ -f ${PID_FILE} ]; then
    kill $(cat ${PID_FILE})
    rm -f ${PID_FILE}
    rm -f ${SUBSYS_FILE}
  else
    echo "${PROG} is not running"
  fi
}

status() {
  if [ -f ${PID_FILE} ]; then
    echo "${PROG} is running"
  else
    echo "${PROG} is not running"
  fi
}

case "${1}" in
    start)
       start
       ;;
    stop)
       stop
       ;;
    restart)
       stop
       start
       ;;
    status)
       status
       ;;
    *)
       echo "Usage: ${0} {start|stop|status|restart}"
esac

exit 0