[Bug 2087769] [NEW] cp: preserving permissions for ' ': Operation not supported in Noble NFS

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When a "cp -puR A B" or a "cp -a A B" command is executed in a NFS
environment the message "cp: preserving permissions for '_file_':
Operation not supported" is displayed with a return code 1 on the target
system. 'A' is a exported directory from an Ubuntu 24.04 Noble, 'B' is
an Ubuntu target directory. The /etc/exports in Noble source system come
from an Ubuntu 22.04 Jammy and is unchanged. These cp commands worked
fine if the source directory was in an older Ubuntu (before Noble)
shared directory.

The results of these "error" cp commands are OK but the return code 1 is
a problem in a sh script.

EXAMPLE OF /etc/exports FILE FROM A SOURCE SYSTEM:
/home			*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/sys-DATA		*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/MINOS-DATA	*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/PONTOS-home	*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/PONTOS-DATA	*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/THEA-DATA	*.cyclope*(rw,sync,no_subtree_check,no_root_squash)
/media/SYSRAM		*.cyclope*(rw,sync,no_subtree_check,no_root_squash,fsid=49c1fb21-cc31-4620-8dd8-2422c3d4f59c)

EXAMPLE OF cp COMMANDS EXECUTION:
cyclope at MIMAS:~$ cp -puR /media/MINOS§MINOS-DATA/cmn/bin /home/cyclope/zut
cp: conservation des droits pour «/home/cyclope/zut/bin/ugrubcg»: Opération non supportée
cp: conservation des droits pour «/home/cyclope/zut/bin/s-hdd»: Opération non supportée
cp: conservation des droits pour «/home/cyclope/zut/bin/mdcmpf»: Opération non supportée
cp: conservation des droits pour «/home/cyclope/zut/bin/adelvir»: Opération non supportée
cp: conservation des droits pour «/home/cyclope/zut/bin/vmstart»: Opération non supportée

cyclope at MIMAS:~$ cp -puR /media/MINOS§MINOS-DATA/cmn/bin /home/cyclope/zut; echo $?
cp: conservation des droits pour «/home/cyclope/zut/bin»: Opération non supportée
1

** Affects: coreutils (Ubuntu)
     Importance: Undecided
         Status: New

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cp: preserving permissions for ' ': Operation not supported in Noble NFS
https://bugs.launchpad.net/bugs/2087769
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