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Re: init_buffer PWD fix
From: |
Eli Zaretskii |
Subject: |
Re: init_buffer PWD fix |
Date: |
Mon, 22 Apr 2002 11:01:27 +0300 (IDT) |
On Mon, 22 Apr 2002, Keiichiro Nagano wrote:
> Cygwin sh (ash) is a lightweight Bourne shell, which does not
> update PWD even when it does chdir. Child processes inherit
> environmental variables from their parent processes. So when you
> invoke ash from bash, and do 'cd' in ash, then you have an old and now
> wrong PWD.
Thanks for the explanation. But I still don't see how this would cause a
specific failure in Emacs in some situation. Can you describe such a
specific failure, complete with the commands to type outside and inside
Emacs, and with analysis of what happens inside init_buffer in that case?
> Same problems happen when you invoke command.com, cmd.exe,
> nmake.exe from the bash shell.
Since these programs ignore PWD, I don't see how can this do any harm.
Again, a specific example will help.
> bash$ cd work # chdir to work...
> bash$ printenv PWD # and PWD is updated
> /home/work # it's ok
> bash$ sh # invoke sh (ash)...
> sh$ cd .. # and chdir to /home...
> sh$ printenv PWD # how about the PWD?
> /home/work # Oh God!
Yes, I understand this much, but how does this affect Emacs? You are
suggesting a change in Emacs, not in Bash or ash.
The mere fact that "printenv PWD" prints a wrong directory is not in
itself a problem, especially not a problem for Emacs.
> Same problems happen quite often when you 'make' Emacs Lisp products
> which have chdir in their 'Makefile's.
What practical Emacs-related problems happen in those cases? Can you
give an example of such a case, and describe the problems you have with
the current Emacs code in that specific example?
TIA
Re: init_buffer PWD fix, Paul Eggert, 2002/04/22
- Re: init_buffer PWD fix, Eli Zaretskii, 2002/04/22
- Re: init_buffer PWD fix, Paul Eggert, 2002/04/22
- Re: init_buffer PWD fix, Eli Zaretskii, 2002/04/22
- Re: init_buffer PWD fix, Paul Eggert, 2002/04/22
- Re: init_buffer PWD fix, Eli Zaretskii, 2002/04/22
- Re: init_buffer PWD fix, Paul Eggert, 2002/04/22
- Re: init_buffer PWD fix, Eli Zaretskii, 2002/04/23