How can I kill and wait for background processes to finish in a shell script when I Ctrl+C it?

Posted by slipheed on Server Fault See other posts from Server Fault or by slipheed
Published on 2012-11-13T02:30:46Z Indexed on 2012/11/13 5:03 UTC
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I'm trying to set up a shell script so that it runs background processes, and when I ctrl+C the shell script, it kills the children, then exits.

The best that I've managed to come up with is this. It appears that kill 0 -INT also kills the script before the wait happens, so the shell script dies before the children complete.

Any ideas on how I can make this shell script wait for the children to die after sending INT?

trap 'killall' INT

killall() {
    echo **** Shutting down... ****
    kill 0 -INT
    wait # Why doesn't this wait??
    echo DONE

process1 &
process2 &
process3 &

cat # wait forever

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