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Re: PWD parameter

X-seq: zsh-workers 3997
From: Zoltan Hidvegi <hzoli@xxxxxxxxxx>
To: schaefer@xxxxxxxxxxxxxxxx (Bart Schaefer)
Subject: Re: PWD parameter
Date: Sun, 24 May 1998 22:02:28 -0500 (CDT)
Cc: zsh-workers@xxxxxxxxxxxxxxx
In-reply-to: <980524191600.ZM10165@xxxxxxxxxxxxxxxxxxxxxxx> from Bart Schaefer at "May 24, 98 07:16:00 pm"

> } This is exacly how zsh behaves after typeset +r PWD.
> 
> Not quite.  For example, my $HOME is /home/schaefer, but that's really a
> symlink to /extra/home/schaefer.  In zsh 3.0.5, if I do
> 
> 	cd $HOME
> 	typeset +r PWD
> 	unset PWD
> 	PWD=/extra/home/schaefer
> 	echo $PWD
> 
> then what I get back is /home/schaefer.  *That* seems a bit odd.

PWD has nullsetfn as the write function.  Since PWD is special, unset
just sets a flag in the Param node, it does not really unset anything.
The PWD=... assignment clears this flag, restoring the old value of PWD.
The assigned value is lost.

Zoltan

Follow-Ups:
- Re: PWD parameter
  - From: Bart Schaefer

References:
- Re: PWD parameter
  - From: Bart Schaefer

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