From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
---|---|
To: | Andrew Dunstan <andrew(at)dunslane(dot)net>, pgsql-committers(at)postgresql(dot)org |
Subject: | Re: pgsql: Work around Msys weakness in Testlib.pm's command_like() |
Date: | 2017-07-31 19:30:35 |
Message-ID: | 8123c31c-5e70-caf7-76ed-6d9d5cd5b8a3@2ndquadrant.com |
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On 7/26/17 22:49, Andrew Dunstan wrote:
> Work around Msys weakness in Testlib.pm's command_like()
>
> When output of IPC::Run::run () is redirected to scalar references, in
> certain circumstances the Msys perl does not correctly detect that the
> end of file has been seen, making the test hang indefinitely. One such
> circumstance is when the command is 'pg_ctl start', and such a change
> was made in commit f13ea95f9e. The workaround, which only applies on
> MSys, is to redirect the output to temporary files and then read them in
> when the process has finished.
This commit message contains interesting information that would be
useful to record in a code comment. Otherwise it's not really clear
when or why to use the "safe" variant.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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