Re: getcwd() returns with stale errno value upon error

[Chet Ramey]

On 6/25/25 3:44 AM, Richard Weinberger wrote:

Bash Version: 5.2
Patch Level: 37
Release Status: release

Description:
         getcwd() as implemented in lib/sh/getcwd.c can return with NULL and a
         stale errno value if the algorithm fails. It aborts if readdir()
         returns NULL and no matching directory entry was found.
         But bash's getcwd() assumes that NULL from readdir() is always an 
error,
         which is not the case.

         This can happen on filesystems where d_ino != st_ino such as
         on Linux's OverlayFS.

Thanks for the report. I'll look at this after bash-5.3 is released.

Chet

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    c...@case.edu    http://tiswww.cwru.edu/~chet/

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