codemux.initscript

   1 #!/bin/sh
   2 #
   3 # chkconfig: 345 85 02
   4 # description: codemux startup script
   5 #
   6
   7 PROC=codemux
   8
   9 . /etc/rc.d/init.d/functions
  10
  11 RETVAL=0
  12
  13 pidfile=/var/run/$PROC.pid
  14
  15 check_status() {
  16     pid=`cat $pidfile 2>/dev/null`
  17     #
  18     # this eliminates a race condition between checking existence of pidfile
  19     # and reading its value
  20     #
  21     [ -n "$pid" -a -d /proc/$pid ]
  22 }
  23
  24 case "$1" in
  25     start)
  26         echo -n "starting $PROC:"
  27         pid=`cat $pidfile 2>/dev/null`
  28         if [ -n "$pid" ]; then
  29             # check whether process really exists
  30             # yes - don't try to start
  31             [ -d /proc/$pid ] && action "already running" /bin/true && exit 1
  32
  33             # no - PID file is stale
  34             rm -f $pidfile
  35         fi
  36
  37         initlog -c /usr/local/planetlab/sbin/codemux
  38
  39         cmd=success
  40         check_status && touch /var/lock/subsys/$PROC || cmd=failure
  41         $cmd "$PROC startup"
  42         echo
  43         ;;
  44
  45     stop)
  46         echo -n "shutting down $PROC: "
  47         killproc $PROC
  48         RETVAL=$?
  49         echo
  50         [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$PROC
  51         ;;
  52
  53     restart|reload)
  54         $0 stop
  55         $0 start
  56         RETVAL=$?
  57         ;;
  58
  59     status)
  60         check_status && echo 'running' && exit 0 || \
  61             echo 'not running' && exit 1
  62         ;;
  63
  64     *)
  65         echo "Usage: $0 {start|stop|restart|status}"
  66         RETVAL=1
  67 esac
  68
  69 exit $RETVAL