bug#32588: 27.0.50; ‘default-directory’ not updated

bug#32588: 27.0.50; ‘default-directory’ not updated

[Andreas Röhler]

‘default-directory’ not updated when dir was changed by a program

Recipe from emacs -Q:

M-x shell RET
cd
mkdir newdir
echo "cd \$HOME/newdir/" > tonewdir
chmod 700 tonewdir
. tonewdir
pwd

;;;
`pwd` prints correctly result of $HOME/newdir
while C-h v default-directory RET displays value of $HOME

Thanks,
Andreas

In GNU Emacs 27.0.50 (build 1, i686-pc-linux-gnu, GTK+ Version 3.14.5)
  of 2018-08-29
Repository revision: 190e85b8d286408a88bb611967e658639c48d6c5
Windowing system distributor 'The X.Org Foundation', version 11.0.11604000
System Description: Debian GNU/Linux 8 (jessie)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
~
Mark set
M-RET is undefined
Type "q" in help window to restore its previous buffer, C-M-v to scroll 
help.

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  'configure --with-modules'

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bug#32588: 27.0.50; ‘default-directory’ not updated

[Noam Postavsky]

tags 32588 notabug
close 32588
quit

Andreas Röhler <andreas.roehler@easy-emacs.de> writes:

> ‘default-directory’ not updated when dir was changed by a program
>
> Recipe from emacs -Q:
>
> M-x shell RET
> cd
> mkdir newdir
> echo "cd \$HOME/newdir/" > tonewdir
> chmod 700 tonewdir
> . tonewdir
> pwd
>
> ;;;
> `pwd` prints correctly result of $HOME/newdir
> while C-h v default-directory RET displays value of $HOME

(emacs) Directory Tracking:

    Shell mode keeps track of `cd', `pushd' and `popd' commands given to
    the subshell, in order to keep the Shell buffer's default directory
    (*note File Names::) the same as the shell's working directory.  It
    recognizes these commands by examining lines of input that you send.

       If you use aliases for these commands, you can tell Emacs to
    recognize them also, by setting the variables `shell-pushd-regexp',
    `shell-popd-regexp', and `shell-cd-regexp' to the appropriate regular
    expressions (*note Regexps::).

       If Emacs gets confused about changes in the working directory of the
    subshell, type `M-x dirs'.