Generic init script

sample-init.sh

#!/bin/sh
#
# MYNAME          DESCRIPTION
#
# chkconfig: 345 95 5
# description: 		DESCRIPTION
#

### BEGIN INIT INFO
# Provides:          NAME
# Required-Start:    $network
# Required-Stop:     $network
# Description:       DESCRIPTION
# Short-Description: DESCRIPTION
### END INIT INFO

PATH=/sbin:/usr/sbin:/bin:/usr/bin
NAME=MYNAME
CONTROL=/path/to/${NAME}
DESC=MYNAME

LOCK_FILE=/var/lock/subsys/$NAME

RETVAL=0
set -e

start () {
    set +e
    OUTPUT=$($CONTROL start) 
    echo $OUTPUT | grep -q 'ERROR' 
    STARTSTATUS=$?
    set -e
    case "$STARTSTATUS" in
        1)
            echo SUCCESS
            if [ -n "$LOCK_FILE" ] ; then
                touch $LOCK_FILE
            fi
            RETVAL=0
            ;;
        *)
            echo FAILED
            echo $OUTPUT
            RETVAL=1
            ;;
    esac
}

stop () {
        set +e
        $CONTROL stop
        RETVAL=$?
        set -e
        if [ $RETVAL = 0 ] ; then
            echo SUCCESS
            if [ -n "$LOCK_FILE" ] ; then
                rm -f $LOCK_FILE
            fi
        else
            echo FAILED
        fi
}

status() {
    set +e
    OUTPUT=$($CONTROL status)
    echo $OUTPUT | grep -q 'no instances running' 
    if [ $? = 0 ] ; then
        RETVAL=3
    fi
    echo $OUTPUT
    set -e
}

restart() {
    stop
    start
}

case "$1" in
    start)
        echo -n "Starting $DESC: "
        start
        ;;
    stop)
        echo -n "Stopping $DESC: "
        stop
        ;;
    restart)
        echo -n "Restarting $DESC: "
        restart
        ;;
    status)
        status
        ;;
    *)
        echo "Usage: $0 {start|stop|status|restart}" >&2
        RETVAL=1
        ;;
esac

exit $RETVAL

I use this format a lot for ruby script that use daemons to run as a daemon.

It would be good to manage the PID stuff directly from this init script, and perhaps use redhat functions - like daemon control and colourised success/failure messages

Or just use supervisord