From owner-freebsd-bugs@freebsd.org Tue Dec 12 11:48:20 2017 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9C72EE95779 for ; Tue, 12 Dec 2017 11:48:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8A65F784E2 for ; Tue, 12 Dec 2017 11:48:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id vBCBmKXH018251 for ; Tue, 12 Dec 2017 11:48:20 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 224270] Get exit status of process that's piped to another: set -o pipefail is missing for /bin/sh Date: Tue, 12 Dec 2017 11:48:20 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: wosch@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Dec 2017 11:48:20 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224270 Bug ID: 224270 Summary: Get exit status of process that's piped to another: set -o pipefail is missing for /bin/sh Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: wosch@FreeBSD.org The bash, zsh and ksh have a nice feature to detect a non-zero status in a pipe: from the bash(1) manual page: The return status of a pipeline is the exit status of the last comm= and, unless the pipefail option is enabled. If pipefail is enabled, the pipelin= e's=20 return status is the value of the last (rightmost) command to exit with= a non-zero status, or zero if all commands exit successfully.=20 $ bash -c 'set -o pipefail; false | true; echo $?' 1 $ ksh93 -c 'set -o pipefail; false | true; echo $?' 1 $ zsh -c 'set -o pipefail; false | true; echo $?' 1 However, this feature is missing in /bin/sh: $ sh -c 'set -o pipefail; false | true; echo $?' set: Illegal option -o pipefail $ sh -c 'false | true; echo $?' 0 There are workaround for shell which don=E2=80=99t check the pipe status, a= s described in https://unix.stackexchange.com/questions/14270/get-exit-status-of-process-t= hats-piped-to-another (((((exec 3>&- 4>&-; someprog); echo $? >&3) | filter >&4) 3>&1) | (read xs; exit $xs)) 4>&1 but this looks bizarre and you have to do it for every command in the pipe line. I really wish that we have the 'set -o pipefail' option setting in FreeBSD /bin/sh too. --=20 You are receiving this mail because: You are the assignee for the bug.=