rmdir of non empty dir causes wrong errno with SMB or NFS fs

Mon Jul 14 14:39:36 GMT 2025

Hi Aurélien,
On Jul 12 15:02, Aurélien Couderc wrote:
> Cygwin 3.7.0-0.219.gbf81e32f29e0.x86_64, /bin/rmdir causes wrong errno
> if the filesystem is SMB or NFS.
>> Test case:
> bash -c 'rm -Rf d1 ; mkdir d1 ; touch d1/f1 ; rmdir d1'
>> On C; I get:
> rmdir: failed to remove 'd1': Directory not empty
>> On N: (Windows NFS) I get:
> rmdir: failed to remove 'd1': Bad address
>> if I trace this I get:
> bash -c 'rm -Rf d1 ; mkdir d1 ; touch d1/f1 ; strace -o
> /tmp/rmdirtracelog.txt rmdir d1'
> rmdir: failed to remove 'd1': Permission denied
>> Both "Bad address" and "Permission denied" are IMO wrong, the expected
> error would be "Directory not empty".

I can't reproduce this:
 $ uname -r
 3.7.0-dev-228-g8065978ff838.x86_64
 $ cd <my Samba mount>
 $ bash -c 'rm -Rf d1 ; mkdir d1 ; touch d1/f1 ; rmdir d1'
 rmdir: failed to remove 'd1': Directory not empty
 $ cd <my MSFT NFS v3 mount>
 $ bash -c 'rm -Rf d1 ; mkdir d1 ; touch d1/f1 ; rmdir d1'
 rmdir: failed to remove 'd1': Directory not empty
Sorry, I have no idea why this fails for you. On a hunch, are you
missing identity mapping? Different SIDs on SMB, no identity mapping on
NFS?
Corinna