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Re: $(pwd) != $(/bin/pwd)


From: Chet Ramey
Subject: Re: $(pwd) != $(/bin/pwd)
Date: Tue, 5 Jan 2010 16:40:50 -0500

> Well, if I read
> http://www.opengroup.org/onlinepubs/9699919799/utilities/pwd.html
> correctly, bash pwd should output /home/darkk/bar in that case
> as $PWD does *not* contain an absolute path to the current
> directory.

Bash notices this when running in posix mode, and recanonicalizes the
pathname.  By default, it does not.

> Having said that, ksh93, ash and zsh behave like bash, pdksh and
> its derivatives being the only ones that behave as POSIX
> requires.

Bash behaves as Posix requires when running in posix mode.  When it's not,
it does the same thing as other shells.

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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