iperf server as a daemon for bandwidth checking in RHEL6

iperfd

#! /bin/bash
#
# iperf advanced bandwidth test tool
#
# chkconfig: - 90 60
# description: iperf is an advanced bandwidth test tool
# processname: iperf
# pidfile: /var/run/iperf.pid
# Source function library.
. /etc/init.d/functions

RETVAL=0

# See how we were called.
  
prog="iperf"
port="11111"
logfile="/var/log/iperf"

start() {
        echo -n $"Starting $prog: "
        iperf -s -p $port -D > $logfile
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && touch /var/lock/subsys/iperf
        return $RETVAL
}

stop() {
        echo -n $"Stopping $prog: "
        killproc iperf 2>/dev/null
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/iperf
        return $RETVAL
}

rhstatus() {
        status iperf
}

restart() {
        stop
        start
}

reload() {
        echo -n $"Reloading iperf daemon configuration: "
        killproc iperf -HUP
        RETVAL=$?
        echo
        return $RETVAL
}

case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  restart)
        restart
        ;;
  reload)
        reload
        ;;
  status)
        rhstatus
        ;;
  condrestart)
        [ -f /var/lock/subsys/iperf ] && restart || :
        ;;
  *)
        echo $"Usage: $0 {start|stop|status|reload|restart|condrestart}"
        exit 1
esac

exit $?