On Tue, Jul 09, 2024 at 11:04:14 +0200, Patrice Duroux wrote: > $ cat test.sh > #!/usr/bin/sh > > export LANG=C > ls -l ./test.sh > echo "option: -p" > cp -p ./test.sh /tmp > echo "exitcode: "$? > ls -l /tmp/test.sh > rm /tmp/test.sh > for p in mode timestamps ownership ; do > echo "option: --preserve=$p" > cp --preserve=$p ./test.sh /tmp > echo "exitcode: "$? > ls -l /tmp/test.sh > rm /tmp/test.sh > done
> On Sid (amd64), I am facing the following: > > $ ./test.sh > -rwxr-x--- 1 patrice patrice 300 Jul 9 10:46 ./test.sh > option: -p > cp: preserving permissions for '/tmp/test.sh': Operation not supported > exitcode: 1 > -rwxr-x--- 1 patrice patrice 300 Jul 9 10:46 /tmp/test.sh It would be nice to know what directory you're in when you run this. But what I really need to know is whether that directory is /tmp. Let's assume it's not. Your prompt is abbreviated as "$" so I assume you're not running this script as root. (Otherwise your prompt should have been abbreviated as "#".) Are you running this as "patrice"? Are you in /home/patrice? > It says that the operation is not supported but still the mode of the > copy is ok. > Is there an issue somewhere? I can't reproduce your results on a bookworm system (kernel 6.1.0-22-amd64), with /tmp as a regular directory in the / file system, with drwxrwxrwt permissions. It's possible that something changed between the bookworm kernel and your kernel. Or possibly your system has additional "security" features enabled (SELinux?). Can you tell us what kernel you're running, whether /tmp is a mountpoint or a regular directory, what kind of file system it is if it's mounted, and what its permissions are? Does the same issue happen with /var/tmp? How about /run/user/1000 or whatever patrice's UID is? If you make a new directory that's not under /tmp or /var/tmp with drwxrwxrwx permissions (chmod 777), and try to cp -p a file from your home directory to that new directory, do you get the same result? If you make the permissions drwxrwxrwt instead (chmod 1777), do you get the same result?
