Shell Programming and Scripting

#!/bin/ksh 
 
WAITTIME=5 
 
# run the idql command in the background, discarding any output 
idql -n $REPOSITORY_NAME -Udmadmin -P"" -R"$DM_SCRIPTS/test.api" >/dev/null 2>&1 & 
IDQL_PID=$! 
 
# set up a timeout that will kill the idql command when  
# $WAITTIME seconds has passed, unless it has completed before that. 
(sleep $WAITTIME; kill $IDQL_PID 2>/dev/null) & 
TIMEOUT_PID=$! 
 
# wait for the idql command to either complete or get killed; read its return status 
wait $IDQL_PID 
RESULT=$? 
 
# if the timeout is still running, stop it (ignore any errors) 
kill $TIMEOUT_PID 2>/dev/null 
 
# read the return status of the timeout process (we don't need it  
# but running the wait function prevents it from remaining as a  
# zombie process) 
wait $TIMEOUT_PID 
 
if [ $RESULT -eq 1 ];then 
    echo "something is wrong with $REPOSITORY_NAME, It seems to be down. Result - $RESULT" 
elif [ $RESULT -eq 143 ];then 
    echo "Attention!!! ***$REPOSITORY_NAME seems to be HUNG*** Result - $RESULT" 
else 
    echo "$REPOSITORY_NAME seems to be OK. Result - $RESULT" 
fi