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Re: prevent ignore SIGINT for asynchronous commands without enabling job


From: konsolebox
Subject: Re: prevent ignore SIGINT for asynchronous commands without enabling job control
Date: Wed, 10 Apr 2013 21:00:22 +0800

It's actually simple with trap. Just catch SIGINT with a function and call
a function to kill the tree:

https://www.linuxquestions.org/questions/blog/konsolebox-210384/bash-functions-to-list-and-kill-or-send-signals-to-process-trees-34624/

Note killtree3. And that could be merged as one single function per your
own preference.

And do killtree3 "$BASHPID".

On Wed, Apr 10, 2013 at 6:43 PM, Ilya Basin <address@hidden> wrote:

> Hi.
> I have a script that creates some background tasks.
> I want the whole tree to be killed by Ctrl-C.
>
> There's a requirement that the script process and its children must
> belong to the same process group. This is why I can't enable job
> control.
>
> I don't want to use 'trap', because it adds complexity.
>
> Example:
>
>     #!/bin/bash
>     sleep 90 &
>     wait $!
>
> After Ctrl-C "sleep 90" stays.
>
> Using trap:
>
>     #!/bin/bash
>
>     trap 'trap - INT; kill -TERM $noeof_pid; kill -INT $$' INT
>
>     sleep 90 &
>     wait $


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