CODEWITHSUNDEEP
bashbackground-processkill
Debadatta Meher
Debadatta Meher

Reputation: 103

Background function in shell script is not getting killed

First of all I would like to say that I've thoroughly searched the solution to my problem in web/stackoverflow..

I'm having the following shell script scenario:

#!/bin/bash
{
    while :
    do
        echo "running"
        sleep 2
    done
}&

procid=$!
echo $procid
trap "kill -15 $procid" 2 15

Even after interrupting the process with Ctrl-C, the background process is still printing "running" in prompt. I've to kill the background process from terminal using "kill -9 PID", where PID is the process ID of the background process. I tried without the & (not running in background) and the script is terminating well with Ctrl-C.

The solutions to such problem is suggested in these links, however it's not working as desired (The background process is not getting killed). I referred to these links:

How do I kill background processes / jobs when my shell script exits?

linux: kill background task

Upvotes: 1

Views: 1725

Answers (1)

rich remer
rich remer

Reputation: 3577

You need to kill the entire process group:

killall () {
    PID=$$
    kill -9 -$(ps -o pgid= $PID | grep -o '[0-9]*')
}

trap killall EXIT

# ...launch some child processes...

wait

Best way to kill all child processes

Upvotes: 1

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