Re: execve signal reset

[Michael Kerrisk <mtk.manpages-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>]

Hello Colin,

On Wed, Jan 6, 2010 at 3:21 AM, Colin Watson <cjwatson-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org> wrote:
> Using man-pages 3.23 on Ubuntu lucid, I recently had cause to look up
> what happens to signal handlers across execve(). The execve(2) manual
> page contains the following sentence:
>
>  The dispositions of any signals that are being caught are reset to
>  being ignored.
>
> As it happened, though, the signal I'm interested in right now defaults
> to "terminate process", so I found this statement ambiguous, and looked
> up POSIX, which says "Signals set to be caught by the calling process
> image shall be set to the default action in the new process image".
>
> How about the following patch?

Obviously correct, and applied for 2.34.

Thanks,

Michael

>
> diff --git a/man2/execve.2 b/man2/execve.2
> index 0ea50db..11bec18 100644
> --- a/man2/execve.2
> +++ b/man2/execve.2
> @@ -120,7 +120,8 @@ All process attributes are preserved during an
>  except the following:
>  .IP *
>  The dispositions of any signals that are being caught are
> -reset to being ignored.
> +reset to the default action
> +.RB ( signal (7)).
>  .IP *
>  Any alternate signal stack is not preserved
>  .RB ( sigaltstack (2)).
>
> Thanks,
>
> --
> Colin Watson                                       [cjwatson-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org]
>



-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface" http://blog.man7.org/
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