CODEWITHSUNDEEP
shellprocessscriptingtimeoutkill
Rajesh Thampi
Rajesh Thampi

Reputation: 481

Kill processes after N minutes waiting | shell scripting

I'm posting a portion of the sh script that we use with cron to take a cold backup of our Oracle EBIZ. It works most of the times, fails once in a while because one of the processes the script monitor, fails to stop/terminate

Code portion

    su - applprod -c /home/applprod/scripts/Apps_stop.sh
    FNDPROCESS=`ps -ef | grep FNDLIBR | grep applprod | wc -l`
    echo 'We have still running ' $FNDPROCESS ' FNDLIBR for PROD'
    echo 'Please wait...for ' $FNDPROCESS ' seconds!!'

    NPROCESS=$FNDPROCESS
    while [ $FNDPROCESS -gt 0 ]
    do
    FNDPROCESS=`ps -ef | grep FNDLIBR | grep applprod | wc -l`
    if [ $FNDPROCESS -ne $NPROCESS ]
      then
    echo 'We have still running ' $FNDPROCESS ' FNDLIBR for PROD'
    echo 'Please wait...for ' $FNDPROCESS ' seconds!!'
    sleep $FNDPROCESS
    NPROCESS=$FNDPROCESS
    fi
    done

Usually the loop finishes within 3-4 minutes, unless one of the FNDLIBR processes fails to

Now we need to add a max 30 minutes wait time for the loop above, thus, if the wait time is exceeding 29 Minutes, the script should forcefully kill all the processes matching 'FNDLIBR'(Concurrent manager) and come out of the loop.

Please help me :)

Thanks and regards,

Upvotes: 0

Views: 491

Answers (2)

mauro
mauro

Reputation: 5940

I would use the following approach:

  • start your shell script using timeout and specify both max elapsed (29 minutes?) and signal to send if/when the timeout is exceeded (I'd suggest SIGUSR1, SIGUSR2 or so)
  • modify you shell script in order to "trap" the signal here above and kill the processes matching FNDLIBR

This way the process will take 3 or 4 minutes when everything's ok or max 30 minutes when the script monitor fails to terminate.

Upvotes: 0

Akshay
Akshay

Reputation: 45

You can use sleep 1740 Your program will pause for 29 minutes and below this line you can write the code which kills all processes which are still running.

Upvotes: 1

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