Re: [musl] [bug] Ctrl-Z when process is doing posix_spawn makes the process hard to kill

[Rich Felker <dalias@libc.org>]

On Sat, Jan 18, 2025 at 10:51:01AM +0100, Florian Weimer wrote:
> * Askar Safin:
> 
> > Thanks a lot for answer!
> >
> >  ---- On Fri, 17 Jan 2025 10:37:09 +0400  Rich Felker  wrote --- 
> >  > Note that SIGSTOP, which is not blockable interceptible or ignorable,
> >  > can't be handled this way, but the pid has not yet leaked to anything
> >  > at this point, so the only way SIGSTOP can be generated is by a badly
> >  > behaved program signaling random pids, which is not a case that needs
> >  > to be handled gracefully.
> >
> > But what if somebody sends SIGSTOP to whole process group using kill(2)?
> 
> I would expect that they send SIGCONT afterwards to the same process
> group, to resume execution of all processes.  Doesn't this avoid the
> issue?

I mean if you just want a heuristic fix.. I guess?

But certainly they could send SIGSTOP to the group then SIGCONT only
to the single known process.

Rich