rain jungle Apr 25, 2025, 3:29 PM

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Hey im writing a bash script that launches a bunch of subprocesses, and when the process of the script is terminated all subprocesses and possible children of those subprocesses will be terminated

#!/bin/bash
trap "kill \$(pgrep -P $$)" EXIT

command0 &
command1 &
etc...

wait

This works fine when i run the script by itself. Children processes are propperly cleaned up.
However, when running this script as a subprocess itself:

./self_terminating.bash &
sleep 10 # let subprocesses do their thing
kill $!

Children processes are not killed propperly.
Some good samaritan wanna lend me hand?

wind wren Apr 25, 2025, 3:40 PM

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@rain jungle
https://stackoverflow.com/questions/2129923/how-to-run-a-command-before-a-bash-script-exits

Stack Overflow

How to run a command before a Bash script exits?

If a Bash script has set -e, and a command in the script returns an error, how can I do some cleanup before the script exits?

For example:

#!/bin/bash
set -e
mkdir /tmp/foo

... do stuff ...

rm ...

rain jungle Apr 25, 2025, 4:50 PM

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wind wren <@456226577798135808> https://stackoverflow.com/questions/2129923/how-to-run-a-...

yeah that's exactly what i did but capturing the subprocess id

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isn't it the same??

wind wren Apr 25, 2025, 5:16 PM

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...you captured the subprocess ID as you created them, and added them to some Data-Strukture which your trap function has access to and iterated trough to kill all the child-processes? Yes?

rain jungle Apr 25, 2025, 5:21 PM

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oh wow thanks i wouldn't have gotten it without all that condescendence ❤️

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no shit people talk shit about the arch community

wind wren Apr 25, 2025, 5:36 PM

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Multilingual autocorrect fucked me up there, fixed it

wind wren Apr 25, 2025, 6:13 PM

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Man, chill
I just asked that as a sanity check

nova temple Apr 25, 2025, 7:23 PM

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... solved

cobalt sorrelBOT Apr 25, 2025, 7:23 PM

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