On Mon, 1 Sep 2014 21:17:33 +0000 (UTC) Matthew Woodcraft matthew@woodcraft.me.uk wrote:
If such applications exist, they are not portable and are subject to race conditions (deadlock if the signal comes before the system call).
The program is certainly not portable (which is not any kind of a problem), and as pselect is unavailable there is indeed the usual theoretical race (which has not been a problem in practice in the ten years it's been running).
(The program handles SIGTERM so that it can do a bit of cleanup before exiting, and it uses the signal-handler-sets-a-flag technique. The call that might be interrupted is sleep(), so the program doesn't strictly _rely_ on the existing behaviour; it would just become very slow to exit.)
So, if it's just for process exit, just let the signal handler raise an exception and catch the exception at the top-level.
Regards
Antoine.