start/stop scripts

When writing start/stop scripts, halockrun provides two very valueable features:

• Reliable, injected PID files
• Synchronization possibilities

Reliable, injected PID file means that the PID file can not become stale and that the process itself doesn't need to do anything for that.

#! /bin/sh

PROGRAM_NAME="sleep"
START_COMMAND="sleep 1000000"
SIGNAL1="TERM"
SLEEP1="5"
SIGNAL2="KILL"
LOCKFILE=/tmp/MyLockFile

case "$1" in
   'start')
      ./halockrun -anc -E 42  
      if [ $? -eq 42 ]; then
         PROGRAM_PID=$(halockrun -t )
         echo " is already running with PID "
      fi
      ;;
   'stop')
      PROGRAM_PID=$(halockrun -t )
      if [ $? -eq 0 ]; then
         echo " is not running"
      else
         echo "Terminating  () with ..."
         kill - 
         halockrun -cn   echo " () terminated"
         if [ $? -eq 99 ]; then
            sleep 
            echo "Terminating  () with ..."
            kill - 
            halockrun -cn   echo " () terminated"
            if [ $? -eq 99 ]; then
               sleep 
               halockrun -cn   echo " () terminated"
               if [ $? -eq 99 ]; then
                  echo " () has not terminated."
               fi
            fi
         fi
      fi
      ;;
   'status')
      PROGRAM_PID=$(halockrun -t )
      if [ $? = 0 ]; then
         echo " is not running"
      else
         echo " is running with PID "
      fi
      ;;
   *)
      echo "usage: $0 start|stop|status"
      ;;
esac