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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: "wait" loses signals |
| Date | Mon, 24 Feb 2020 11:23:35 -0500 |
| Lines | 15 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.1500.1582561435.2412.bug-bash@gnu.org> (permalink) |
| References | <47762f41-e393-30cd-50ed-43c6bdd29856@redhat.com> <dab35be8-4b56-5887-bfa4-37ea7383864a@case.edu> <750d460d-b8a4-4157-1488-9f4d9f973715@redhat.com> <35034c85-fd5a-5034-a2d5-e3903888069d@case.edu> <cf7adbec-e705-1071-34e1-50f8188f0edc@redhat.com> <d60f1dbc-990d-7291-e075-b67c07f61a86@case.edu> <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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| Cc | chet.ramey@case.edu, Denys Vlasenko <dvlasenk@redhat.com>, Harald van Dijk <harald@gigawatt.nl>, bug-bash@gnu.org |
| To | Daniel Colascione <dancol@dancol.org>, Robert Elz <kre@munnari.OZ.AU> |
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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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