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Date:      Thu, 09 Jul 2020 17:43:31 +0000
From:      bugzilla-noreply@freebsd.org
To:        testing@freebsd.org
Subject:   [Bug 247559] Flakey test case: bin.sh.execution.functional_test.bg12
Message-ID:  <bug-247559-32464-yCdBUYfiLU@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-247559-32464@https.bugs.freebsd.org/bugzilla/>
References:  <bug-247559-32464@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247559

--- Comment #6 from commit-hook@freebsd.org ---
A commit references this bug:

Author: jilles
Date: Thu Jul  9 17:42:31 UTC 2020
New revision: 363053
URL: https://svnweb.freebsd.org/changeset/base/363053

Log:
  MFC r362737: sh/tests: Fix flaky execution/bg12.0

  When job control is not enabled, the shell ignores SIGINT while waiting f=
or
  a foreground process unless that process exits on SIGINT. In this case, t=
he
  foreground process is sleep and it does not exit on SIGINT because the
  signal is only sent to the shell. Depending on order of events, this could
  cause the SIGINT to be unexpectedly ignored.

  On lightly loaded bare metal, the chance of this happening tends to be le=
ss
  than 0.01% but with higher loads and/or virtualization it becomes more
  likely.

  Starting the sleep in background and using the wait builtin ensures SIGINT
  will not be ignored.

  PR:           247559
  Reported by:  lwhsu

Changes:
_U  stable/12/
  stable/12/bin/sh/tests/execution/bg12.0

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