Re: timeout: heads up: kFreeBSD's timers cause all timeout tests to hang

[Pádraig Brady]

On 09/22/2011 09:49 AM, Jim Meyering wrote:
> Pádraig Brady wrote:
>> I can't think of anything better,
>> so attached is a full patch for the above method.
> 
> That was a surprisingly tricky problem.
> Thanks for dealing with it.
> 
>> I'd prefer to avoid timer_settime() if it creates a thread,
>> but I don't know how to portably detect the presence of multiple threads.
>> An alternative to ignore signals we send to our own group is
>> attach a marker to the signal with sigqueue() and we
>> could then discard all such signals. But that functionality
>> is missing on many platforms and would complicate things anyway.
> 
> I like your solution.
> Its apparent simplicity is deceptive.
> Maybe add a NEWS entry?

I'll merge this in and push

+** Changes in behavior
+
+  timeout now only processes the first signal received from the set
+  it is handling (SIGTERM, SIGINT, ...).  This is to support systems that
+  implicitly create threads for some timer functions (like GNU/kFreeBSD).

cheers,
Pádraig.