[PATCH] exit/kill ourself with straced child's exitcode/signal

Dmitry V. Levin ldv at altlinux.org
Mon Sep 29 22:21:23 UTC 2008

On Wed, Sep 24, 2008 at 06:58:05PM +0200, Denys Vlasenko wrote:
> This patch is intended to implement this RFE:
> https://bugzilla.redhat.com/show_bug.cgi?id=105371
> There are some patches for this, but apparently discussion
> on mailing list died out with no results. At least that bug
> is still open. Moreover, the patches are somewhat buggy.
> I propose this patch.
> I think in real-world usage people do not check strace usage in scripts. They
> just use it correctly, so that it doesn't exit(1) with usage info and whatnot.
> But I know that when I try to debug something by replacing "cmd [args]"
> with "strace cmd [args]" the fact that it's sometimes a problem
> that parent does not see exit code of cmd but sees zero.
> IOW: I do not think that there are users who will be adversely affected by this
> change in behavior. Therefore I do not think adding a switch to enable this is
> worth it. It will be just a case of featuritis.
> Problems this patch fixes compared to previous patches:
> * strace returns exit code of straced process, *never its children*.
> * If child died from a signal, strace will (try to) die from the same signal.
> * strace -p <pid> is not affected (will exit 0 as before).

I think your idea how to implement this RFE is better than mine, so
I'm OK to install your patch with minor cleanup.


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