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Hi,

We have xrootd (v5.6.1) set up with the xrootd-multiuser plugin (2.1.2-1.osg36.el7), and are experiencing some problems with the xrdfs ls command.

While we are able to chmod, mkdir, touch etc. on xrdfs correctly, the ls for a directory that according to the POSIX permissions I should be able to view (and can view in a shell) does not seem to work; e.g. if I (lavezzo) want to cat a file that has 700 permissions I can, but if I want to ls a directory with the same permissions, I cannot:

[lavezzo@XXX]$ ll
drwx--S---  2 lavezzo lavezzo 4096 Aug  7 18:04 test
[lavezzo@XXX lavezzo]$ ll test/file.txt
-rwx------ 1 lavezzo lavezzo 13 Aug  7 18:04 test/file.txt
[lavezzo@XXX]$ xrdfs root://<redirector>/
[<redirector>:1094] / > cd /store/user/lavezzo
[<redirector>:1094] /store/user/lavezzo > ls -l
d--- 2023-08-07 22:04:49        4096 /store/user/lavezzo/test
[<redirector>:1094] /store/user/lavezzo > ls test
[<redirector>:1094] /store/user/lavezzo > ls test/file.txt
[ERROR] Server responded with an error: [3005] Unable to open directory /store/user/lavezzo/test/file.txt; not a directory

[<redirector>:1094] /store/user/lavezzo > cat test/file.txt
hello world!

In the logs, I see that multiuser is doing something, but then just hits me with permission denied:

230807 18:13:19 2363453 multiuser_UserSentry: Switching FS uid for user lavezzo
230807 18:13:19 2363453 multiuser_UserSentry: Switching FS uid for user lavezzo
230807 18:13:19 2363453 ofs_readdir: lavezzo.3189625:38@XXX Unable to read directory /store/user/lavezzo/test; permission denied

This is particularly damaging for us because by default when a directory is created through xrdfs mkdir, the permissions are set as such that other users don't have read access, and we haven't been able to successfully change this either.

Any clue whether this is an issue of xrootd-multiuser or of our setup?

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