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Bug 1117316

Summary: wrong return code from a pipe in command substitution
Product: Red Hat Enterprise Linux 6 Reporter: Marcel Kolaja <mkolaja>
Component: kshAssignee: Michal Hlavinka <mhlavink>
Status: CLOSED ERRATA QA Contact: Martin Kyral <mkyral>
Severity: high Docs Contact:
Priority: urgent    
Version: 6.5CC: fkrska, jsvarova, lmiksik, mkyral, ovasik
Target Milestone: rcKeywords: Regression, ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: ksh-20120801-18.el6 Doc Type: Bug Fix
Doc Text:
Due to a regression, the exit code returned from a command substitution containing a pipe could be nonzero even when a command did not fail. A patch has been provided to fix this bug, and the exit code of a command substitution is now correct.
Story Points: ---
Clone Of:
: 1135405 (view as bug list) Environment:
Last Closed: 2014-10-14 07:07:49 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 825520, 1132741, 1135405    
Attachments:
Description Flags
reproducer
none
patch to fix this none

Description Marcel Kolaja 2014-07-08 13:21:46 UTC
Description of problem:
One gets a return code from a pipe in command substitution when pipefail is not set as if it were set.

Version-Release number of selected component (if applicable):
ksh-20120801-10.el6_5.6.x86_64

How reproducible:
always

Steps to Reproduce:
1. run the reproducer (see attached)

Actual results:
2

Expected results:
0

Additional info:
N/A

Comment 1 Marcel Kolaja 2014-07-08 13:28:15 UTC
Created attachment 916378 [details]
reproducer

Comment 2 Marcel Kolaja 2014-07-08 13:33:30 UTC
ksh-20120801-10.el6_5.4.x86_64 works correctly, so it's a regression.

Comment 4 Marcel Kolaja 2014-07-08 13:49:26 UTC
The regression is caused by the fix of bug #825520.

Comment 7 Michal Hlavinka 2014-07-16 15:45:54 UTC
Created attachment 918457 [details]
patch to fix this

Comment 15 errata-xmlrpc 2014-10-14 07:07:49 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2014-1381.html