Date: Sat, 14 Feb 2015 02:59:59 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 197608] timeout(1) does not handle zombie grandchildren Message-ID: <bug-197608-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197608 Bug ID: 197608 Summary: timeout(1) does not handle zombie grandchildren Product: Base System Version: 11.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: emaste@freebsd.org Created attachment 152953 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=152953&action=edit zombie demonstration Attached is a zombie demonstration - it forks and the child immediately exits. The parent sleeps for one second and does not wait() for the child's status. As expected it terminates after 1 second: joule% /usr/bin/time ./a.out 1.02 real 0.00 user 0.00 sys However, running under timeout(1) results in waiting for the timeout period to expire: joule% /usr/bin/time /timeout 10s ./a.out 10.02 real 0.00 user 0.00 sys It looks like the issue is that we collect only one child status (cpid = wait(&status)), which happens to be the zombie from a.out (cpid != pid). We then loop to sigsuspend() and get stuck until the timeout expires. -- You are receiving this mail because: You are the assignee for the bug.
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