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Re: OLDPWD unset when bash starts


From: John Wiersba
Subject: Re: OLDPWD unset when bash starts
Date: Thu, 26 Nov 2015 19:02:33 +0000 (UTC)

Thanks, Chet!


From: Chet Ramey <address@hidden>
To: John Wiersba <address@hidden>; "address@hidden" <address@hidden>
Cc: address@hidden
Sent: Thursday, November 26, 2015 12:41 PM
Subject: Re: OLDPWD unset when bash starts

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    address@hidden    http://cnswww.cns.cwru.edu/~chet/




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