On Wed, Jul 30, 2025, 09:51 Michal Sojka <michal.so...@cvut.cz> wrote:
> Configuration Information: > Machine: x86_64 > OS: linux-gnu > Compiler: gcc > Compilation CFLAGS: -g -O2 > uname output: Linux steelpick 6.12.37 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jul > 10 14:05:15 UTC 2025 x86_64 GNU/$ > Machine Type: x86_64-pc-linux-gnu > > Bash Version: 5.3 > Patch Level: 0 > Release Status: release > > Description: > When running "cd ''", bash 5.3 fails with "cd: null directory" > while previous versions succeeded without an error and no > directory was changed. I'm not sure whether this is considered a > bug or not. The SUS[1] says "If directory is an empty string, > the results are unspecified.". However, I didn't find anything > related to this change in the NEWS file for bash-5.3. Other > shells (zsh, dash, osh) seem to accept empty directory as cd > argument. > > [1]: > https://pubs.opengroup.org/onlinepubs/9699919799/utilities/cd.html > > The current version[1] of the standard specifies: If directory is an empty string, cd shall write a diagnostic message to standard error and exit with non-zero status. This standard change was due to interpretation 1047[2]. [1] https://pubs.opengroup.org/onlinepubs/9799919799/utilities/cd.html [2] https://austingroupbugs.net/view.php?id=1047
