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Date: Sun, 29 Oct 2006 17:16:28 -0800
From: "Hari Krishna Dara" <haridara AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: cygwin Digest 28 Oct 2006 14:33:34 -0000 Issue 5237
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> ---------- Forwarded message ----------
> From: Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
> To: cygwin AT cygwin DOT com
> Date: Sat, 28 Oct 2006 00:16:09 -0400
> Subject: Re: rxvt: Ctrl+C leaves child process of native processes
> On Fri, Oct 27, 2006 at 05:40:36PM -0700, Hari Krishna Dara wrote:
> >When I hit ^C in an rxvt window (no X), it doesn't result in killing
> >all the child processes.
> >
> >In this specific case, I am running ant, either through ant.bat, ant
> >(shell script) or through a custom perl wrapper (which directly
> >executes java bypassing  ant.bat or ant).
> >
> >When the perl wrapper is used it is started from another batch file,
> >so here is how the process execution:
> >- batch starts a perl command
> >- perl command starts java (ant)
> >- ant starts another java process
> >
> >The process tree as shown by sysinternals' process explorer is:
> >
> >bash
> > cmd
> >   perl
> >     java
> >       java
> >
> >When I hit ^C, bash and cmd exit immediately leaving perl and the two
> >java processes.
>
> Cygwin has no way of knowing what the children of non-cygwin
> subprocesses are.  So, as you've found, if you don't use a Cygwin
> program, you won't get linux-like signal results.  This shouldn't be
> *too* surprising.

I don't completely agree with you. If that is the case, then hitting
^C in any bash shell should behave the same, but for bash running in a
native terminal it works as expected. it is not uncommon for make and
other build systems to span number of child processes, and it would be
a havoc if these didn't get killed properly (and would make cygwin
almost unusable). I believe that the problem has something to do with
rxvt.

-- 
Hari

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