#!/bin/sh

#
# ----------------------------------------------------------------------------
#  Script to monitor a test and kill it after a certain elpased time
#
#  Arguments: pass 0's where appropriate for default values
#     $1    elapsed time limit in seconds [600]
#     $2    interval, in seconds, between process status checks [30 seconds]
#     $3    pid of process to monitor
#
#  Returns: returns 118 if the process exceeded the time limit, 0 otherwise
#
#  Programmer: Mark C. Miller 
#  Date:       January 15, 2004 
#
#  Modifications:
#    Re-write if conditionals in style of 'if test...'
#    Made timeLimit be specified in seconds
#
# ----------------------------------------------------------------------------
#

# the total time limit of the test in seconds
timeLimit=$1
if test $timeLimit -eq 0 || test -z "$timeLimit"; then
   timeLimit=600
fi

# we inspect ps every $2 seconds
waitInterval=$2
if test $waitInterval -eq 0 || test -z "$waitInterval"; then
   waitInterval=30
fi

# pid of test to monitor
testPid=$3

# maximum # of iterations to check process 
maxIters=`expr $timeLimit / $waitInterval`

# loop and check status of our running test
numIters=0
processCompleted=0
while test $numIters -lt $maxIters; do
   processStatus=`ps -p $testPid | grep $testPid`
   if test -z "$processStatus"; then
      processCompleted=1
      break;
   fi
   numIters=`expr $numIters + 1`
   sleep $waitInterval
done
  
# kill the process if it didn't complete
if test $processCompleted -eq 0; then
   kill -9 $testPid 1>/dev/null 2>&1 
   exit 118 
fi

exit 0