shell init deamon skeleton

gistfile1.txt

#!/bin/bash
# chkconfig: 345 99 01
# description: ${SOME_NAME}

. /etc/rc.d/init.d/functions

RUNAS=omar
NAME='loop_test'
SCRIPT='/home/omar/while_loop.sh'
LOG_FILE="/home/omar/${NAME}.log"
PID_FILE='/tmp/loop.pid'

status_check() {
  # exit codes
  #0	program is running or service is OK
  #1	program is dead and /var/run pid file exists
  #2	program is dead and /var/lock lock file exists
  #3	program is not running
  status -p ${PID_FILE} ${NAME}
}

status_check_silent() {
  status_check >/dev/null 2>&1
}

start() {
  echo -n $"Starting ${NAME}: "
  su - ${RUNAS} -c 'nohup '${SCRIPT}' > '${LOG_FILE}' 2>&1 & echo "$!"' > ${PID_FILE}
  echo "${NAME} is running on PID `cat ${PID_FILE}`"
}

stop() {
  PID=`cat ${PID_FILE}`
  echo -n $"Stopping ${NAME}: (PID ${PID}) "
  kill -9 "${PID}"
  status_check_silent
  retval=$?
  if [[ retval -eq 1 ]] ; then
    echo "${NAME} killed and now removing pid"
    rm -f "${PID_FILE}"
  else
    echo " * [ERROR] Failed to kill service ${NAME}"
    exit 2
  fi
}

case "$1" in
  start)
    status_check_silent && exit 0
    $1
    ;;
  stop)
    status_check_silent || exit 0
    $1
    ;;
  restart)
    stop
    sleep 5
    start
    ;;
  status)
    status_check
    ;;
  *)
    echo "Usage: $0 {start|stop|status|restart}"
    exit 2
esac