bug#81444: chown, chmod, chgrp, chcon, ls: --recursive walk does not ignore ENOENT errors

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On 20/07/2026 18:12, Paul Holzinger via GNU coreutils Bug Reports wrote:
> Hi,
> 
> I noticed that when chown'ing a directory tree recursively with many
> files sometimes chown will exit 1 and report ENOENT errors. This happens
> when looping over the directory results from readdir() and in a parallel
> another process removes a file before the code then calls stat(),
> chmod() or whatever syscalls the command has to do for the given filename.
> 
> Since such race is expected the coreutils should not treat this as error
> and just ignore them instead. That way a parallel removal of a file will
> not make the commands return exit code 1 and thus possibility break
> scripts. Of course this should only apply to files or directories under
> the main path given as input, i.e. chmod -R dest should still fail with
> ENOENT when dest does not exists.
> 
> Below is a reproducer for the commands, might needs to run a few times
> until it triggers the race condition, I am not sure if there are more
> commands in coreutils which are affected by this.
Thanks for the repro, it works well.

I agree, these commands shouldn't warn or fail for files
being added, replaced, removed in the tree being traversed.
I also notice that du is affected.

The attached should hopefully address this issue.

thanks,
Padraig
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