bug#13535: timeout command not working when SIGALRM blocked

[Pádraig Brady]

On 01/23/2013 05:44 PM, Stephan Krempel wrote:
> Hi there,
>
> If the calling process has SIGALRM blocked, timeout simply never times out.
>
> Find attached a small program to demonstrate the problem and a patch to
> fix it by unblocking the necessary signal (at least on x86/linux).

The sigprocmask gnulib module is used if the sigaction
module is needed, so we should be able to use sigprocmask
unconditionally here. There is even an implementation
for windows included if needed.

> If this is intended behavior, I would suggest to document it explicitly
> to prevent people from tapping into the same pitfall that I hit.

I agree with your patch, and have attached an updated version.

Hmm I suppose we should also do this for SIGCHLD as a follow on from:
http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=73d46261

thanks,
Pádraig.

timeout-block-alrm.patch
Description: Text Data