[PATCH] libc: fix signal handling in system()

[Richard Braun]

On Mon, Jan 16, 2012 at 09:54:24AM -0500, Rich Felker wrote:
> This is the THIRD time I've told you that blocking SIGCHLD rather than
> ignoring it is non-conformant, and I provided the relevant citation
> (link and quoted):
> 
>     The system() function shall ignore the SIGINT and SIGQUIT signals,
>     and shall block the SIGCHLD signal, while waiting for the command
>     to terminate. If this might cause the application to miss a signal
>     that would have killed it, then the application should examine the
>     return value from system() and take whatever action is appropriate
>     to the application if the command terminated due to receipt of a
>     signal.
> 
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/system.html

Last cordial message before "coding under the influence" accusations :

How can you read "shall block the SIGCHLD signal" and understand
"blocking SIGCHLD rather than ignoring it is non-conformant" ? Please be
very specific as I really don't get your point here.

-- 
Richard Braun