#!/bin/sh
#
# Description: start/stop script for smokeping
# Autor: Michel Tokic <michel@tokic.com>
#

# the path to your PID file
PIDFILE=/usr/local/smokeping/etc/data/smokeping.pid
# path to smokeping script 
SMOKEPING=/usr/local/smokeping/bin/smokeping 


ERROR=0
RUNNING=0
ARGV="$@"
if [ "x$ARGV" = "x" ] ; then
    ARGS=help
fi

for ARG in $@ $ARGS
do

    if [ -f $PIDFILE ] ; then
        PID=`cat $PIDFILE`
        if kill -0 $PID 2>/dev/null ; then
            # smokeping is running 
            RUNNING=1
        else
            # smokeping not running but PID file exists => delete PID file
            rm -f $PIDFILE
            RUNNING=0
        fi
    else
        # smokeping (no pid file) not running
        RUNNING=0
    fi

    case $ARG in
    start)

        if [ $RUNNING -eq 0 ] ; then 
	    if $SMOKEPING > /dev/null; then
	        echo "$0 $ARG: smokeping started"
  	    else
	        echo "$0 $ARG: smokeping could not be started"
	        ERROR=1
	    fi
        else 
	    echo "$0 $ARG: smokeping is running with PID $PID"
	    ERROR=2
        fi
	;;
    stop)
        if [ $RUNNING -eq 1 ] ; then
            if kill $PID ; then
                echo "$0 $ARG: smokeping ($PID) stopped"
                rm $PIDFILE 
            else
                echo "$0 $ARG: smokeping could not be stopped"
                ERROR=3
            fi
        else 
            echo "$0 $ARG: smokeping not running"
            ERROR=4
        fi
	;;
    restart)
        if [ $RUNNING -eq 1 ] ; then
            if $SMOKEPING --restart > /dev/null; then
  	        echo "$0 $ARG: smokeping restarted"
            else
     	        echo "$0 $ARG: smokeping could not be started"
	        ERROR=5
	    fi
        else 
             $0 start 
        fi
	;;
    strace_debug)
        rm -f /tmp/strace_smokeping
        if [ $RUNNING -eq 1 ] ; then
            if strace -o/tmp/strace_smokeping $SMOKEPING --restart >/dev/null; then
	        echo "$0 $ARG: smokeping restarted with strace debug in /tmp/strace_smokeping"
            else
     	        echo "$0 $ARG: smokeping strace debug could not be started"
	        ERROR=6
   	    fi
        else 
            if strace -o/tmp/strace_smokeping $SMOKEPING >/dev/null; then
	        echo "$0 $ARG: smokeping started with strace debug in /tmp/strace_smokeping"
            else
     	        echo "$0 $ARG: smokeping strace debug could not be started"
	        ERROR=7
   	    fi
        fi
	;;
    status)
        if [ $RUNNING -eq 1 ] ; then
            echo "$0 $ARG: smokeping is running with PID ($PID)"
        else 
            echo "$0 $ARG: smokeping is not running"
        fi
        ;;
    *)
        echo "usage: $0 (start|stop|restart|status|strace_debug|help)"
        cat <<EOF

  start      - start smokeping 
  stop       - stop smokeping 
  restart    - restart smokeping if running or start if not running
  status     - show status if smokeping is running or not
  help       - this screen

EOF

        ;;

    esac
done
exit $ERROR