Date: Tue, 26 Mar 2019 22:34:59 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 224270] Get exit status of process that's piped to another: set -o pipefail is missing for /bin/sh Message-ID: <bug-224270-227-XBknVv0v3Z@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-224270-227@https.bugs.freebsd.org/bugzilla/> References: <bug-224270-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224270 --- Comment #17 from commit-hook@freebsd.org --- A commit references this bug: Author: jilles Date: Tue Mar 26 22:34:10 UTC 2019 New revision: 345561 URL: https://svnweb.freebsd.org/changeset/base/345561 Log: MFC r344502: sh: Add set -o pipefail The pipefail option allows checking the exit status of all commands in a pipeline more easily, at a limited cost of complexity in sh itself. It wo= rks similarly to the option in bash, ksh93 and mksh. Like ksh93 and unlike bash and mksh, the state of the option is saved whe= n a pipeline is started. Therefore, even in the case of commands like A | B & a later change of the option does not change the exit status, the same way (A | B) & works. Since SIGPIPE is not handled specially, more work in the script is requir= ed for a proper exit status for pipelines containing commands such as head t= hat may terminate successfully without reading all input. This can be somethi= ng like ( cmd1 r=3D$? if [ "$r" -gt 128 ] && [ "$(kill -l "$r")" =3D PIPE ]; then exit 0 else exit "$r" fi ) | head PR: 224270 Relnotes: yes Changes: _U stable/11/ stable/11/bin/sh/jobs.c stable/11/bin/sh/options.h stable/11/bin/sh/sh.1 stable/11/bin/sh/tests/execution/Makefile stable/11/bin/sh/tests/execution/pipefail1.0 stable/11/bin/sh/tests/execution/pipefail2.42 stable/11/bin/sh/tests/execution/pipefail3.42 stable/11/bin/sh/tests/execution/pipefail4.42 stable/11/bin/sh/tests/execution/pipefail5.42 stable/11/bin/sh/tests/execution/pipefail6.42 stable/11/bin/sh/tests/execution/pipefail7.0 --=20 You are receiving this mail because: You are the assignee for the bug.=
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