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Re: OLDPWD unset when bash starts
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From: |
Chet Ramey |
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Subject: |
Re: OLDPWD unset when bash starts |
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Date: |
Thu, 26 Nov 2015 12:41:12 -0500 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 11/18/15 2:44 PM, John Wiersba wrote:
> Why does bash clear OLDPWD when a child script is started?
Because a new shell does not have a `previous working directory'. It's
supposed to be set by cd, and if you haven't executed cd, you don't have
one.
It seems reasonable to inherit OLDPWD if it names a directory, in the same
way that the shell inherits PWD if it names the current directory, so we'll
try that for the next bash version.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/