Re: "wait" loses signals

From	Chet Ramey <chet.ramey@case.edu>
Newsgroups	gnu.bash.bug
Subject	Re: "wait" loses signals
Date	2020-02-24 11:23 -0500
Message-ID	<mailman.1500.1582561435.2412.bug-bash@gnu.org> (permalink)
References	(6 earlier) <00620c20-19ea-e71e-dc1b-926847901f82@redhat.com> <25750.1582534783@jinx.noi.kre.to> <448.1582546845@jinx.noi.kre.to> <07d1441d41280e6f95352222048d6485.squirrel@dancol.org> <24423cbe-97f0-8d75-c926-fad6f6ad339d@case.edu>

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On 2/24/20 7:58 AM, Daniel Colascione wrote:

> No, it's not that much trouble to fix the bug. The techniques for fixing
> this kind of signal race are well-known. In particular, instead of
> waitpid, you use a self-pipe and signal the pipe in the signal handler,
> and you have a signal handler for SIGCHLD. 

You've just substituted a real IPC mechanism (pipes) for the one people
are trying to make signals into.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
		 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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Re: "wait" loses signals Chet Ramey <chet.ramey@case.edu> - 2020-02-24 11:23 -0500

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