SAP router services script on linux.

#!/bin/sh
#
### BEGIN INIT INFO
# Provides: saprouter
# Default-Start:
# Default-Stop:
# Should-Start:
# Required-Start: $network
# Required-Stop:
# Short-Description: Start and stop the SAP router relay server
# Description: saprouter provides relay server for SAP.
### END INIT INFO
#
# The fields below are left around for legacy tools (will remove later).
# chkconfig: - 65 35
# description: saprouter provides a relay for Dynamic Host Control Protocol.
# processname: saprouter
# # pidfile: /var/run/saprouter.pid

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

RETVAL=0

basedir=/usr/saprouter
prog=saprouter
user=saprouter
exec="${basedir}/exe/${prog}"
lockfile="/var/lock/subsys/${prog}"
pidfile="/var/run/${prog}.pid"
logfile="${basedir}/LOG/${prog}.log"
tracefile="${basedir}/TRC/${prog}.trc"
config="${basedir}/ACL/${prog}.tab"

SAPROUTERARGS=" -r -R ${config} -G ${logfile} -T ${tracefile} -J 1048576 -Y 12 -C 1000 -W 9000000 "
export PATH=${PATH}:${basedir}/exe
if [ -z "${LD_LIBRARY_PATH}" ];
then
  export LD_LIBRARY_PATH=${basedir}/exe
else
  export LD_LIBRARY_PATH=${basedir}/exe:${LD_LIBRARY_PATH}
fi

configtest() {
    [ -x "${exec}" ] || exit 5
    [ -f "${config}" ] || exit 6
    [ -d "${logdir}" ] && exit 6
    [ -d "${tracedir}" ] && exit 6
    return 0
}

rh_status(){
    status "${exec}"
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

start() {
    [ `id -u` -eq 0 ] || exit 4
    configtest
    rh_status_q && return 0

    echo -n $"Starting $prog: "
    daemon --user "${user}" "${exec}" $SAPROUTERARGS 2>/dev/null >/dev/null &
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch $lockfile
    return $RETVAL
}

stop() {
    args_soft="-p"
    args_hard="-s"
    [ `id -u` -eq 0 ] || exit 4

    rh_status_q
    RETVAL=$?
    if [ $RETVAL -gt 0 ] ;
    then
        echo "Saprouter is already stop"
        return 0
    fi

    echo -n $"Shutting down softly $prog: "
    su - "${user}" -c "${exec} ${args_soft}"
    sleep 2
    rh_status_q
    RETVAL=$?
    echo
    if [ $RETVAL -eq 0 ] ;
    then
        echo "Saprouter is still started. We will try a hard shutdown"
        su - "${user}" -c "${exec} ${args_hard}"
        sleep 2
        rh_status_q
        RETVAL=$?
        echo
        if [ $RETVAL -eq 0 ] ;
        then
            echo "Saprouter is still started. We will try OS kill."
            killproc "${prog}"
            RETVAL=$?
            if [ $RETVAL -eq 0 ] ;
            then
                echo "Saprouter is still started. Soft, hard and OS killing failed!!!"
                return 2
            else
                echo "Saprouter is down with OS killing."
                RETVAL=0
            fi
        else
            echo "Saprouter is down with hard shutdown."
            RETVAL=0
        fi
    else
        echo "Saprouter is down"
        RETVAL=0
    fi

    [ $RETVAL -eq 0 ] && rm -f $lockfile
    return $RETVAL
}

usage() {
    echo $"Usage: $0 {start|stop|restart|force-reload|condrestart|try-restart|configtest|status}"
}

if [ $# -gt 1 ]; then
    exit 2
fi

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart|force-reload)
        stop ; start
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        stop ; start
        ;;
    reload)
        usage
        # unimplemented feature
        exit 3
        ;;
    configtest)
        configtest
        ;;
    status)
        rh_status
        ;;
    *)
        usage
        exit 2
        ;;
esac

exit $?