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https://issues.apache.org/jira/browse/VCL-725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13777714#comment-13777714
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Andy Kurth commented on VCL-725:
--------------------------------
Author: arkurth
Date: Thu Sep 19 14:20:23 2013
New Revision: 1524750
URL: http://svn.apache.org/r1524750
Log:
VCL-725
Reworked utils.pm::run_command to call the command via backticks instead of
opening a pipe. This seems to always return the correct exit status.
> utils.pm run_command does not consistently return exit status
> -------------------------------------------------------------
>
> Key: VCL-725
> URL: https://issues.apache.org/jira/browse/VCL-725
> Project: VCL
> Issue Type: Bug
> Components: vcld (backend)
> Affects Versions: 2.3
> Reporter: Andy Kurth
> Assignee: Andy Kurth
> Priority: Minor
> Fix For: 2.3.3
>
>
> utils.pm::run_command does not consistently return the correct exit status.
> It often returns -1. This looks to be due to timing of when REAPER is
> called. Sometimes REAPER enters its 'while waitpid' block, sometimes it
> doesn't. Either way, the exit status is inconsistent.
> I don't know of a benefit of entering REAPER for children of vcld child
> processes. It can be bypassed by adding the following in run_command after
> the process is forked:
> $SIG{CHLD} = undef;
> If this is added, the exit status is always correct. It is also correct if
> the entire subroutine is changed to call the command via backticks.
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