Re: how to make a non-interactive bash kill its children

[Irek Szczesniak]

Chet Ramey wrote:

> > I want Bash to kill the commands that I run when my script exits.  The 
> > option "huponexit" doesn't work for me because Bash runs 
> > non-interactively.  How can I achieve my goal?
>
> Since it's a script, all processes are in the same process group.
> Depending on your system (most accept this), you could do something
> like
>
>         trap 'kill -s HUP 0' 0

Thank you.  I tried this on Linux, Mac OS X, and AIX.  It works great.
This is a sample script:

> #!/bin/bash
> sleep 100 &
> sleep 4
> trap 'kill -s HUP 0' 0

It works great except the exit code is 129:

> ~ >./script.sh; echo $?
> Hangup
> 129

The improvement therefore is to catch the HUP signal like this:

> #!/bin/bash
> sleep 1h &
> sleep 4
> trap 'exit 0' HUP
> trap 'kill -s HUP 0' EXIT


Best,
Irek