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I am trying to chown a file, and I am getting a Not ownermessage

bash-3.00$ uname -a
SunOS host001 5.10 Generic_138888-03 sun4u sparc SUNW,SPARC-Enterprise
bash-3.00$ id
uid=60010(user1) gid=910(web)
bash-3.00$ ls -l file.ext
-rwxrwxrwx   1 user1  web        17449 Feb 14 10:53 file.ext
bash-3.00$ chown user2 file.ext
chown: file.ext: Not owner

How could I detect if this machine has restricted chown usage?

2 Answers 2

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getconf _POSIX_CHOWN_RESTRICTED / checks the setting on the / directory, POSIX allows different paths to have different values, such as local filesystems vs. NFS, hence the requirement to include a path to the directory or file you want to know about.

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As root:

echo "rstchown/D" | adb -k /dev/ksyms

If this returns "rstchown: 1", then you cannot chown unless root. You can add:

set rstchown = 0

to /etc/system to change this behavior.

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  • Isn't there any way to check without root permission?
    – fglez
    Feb 14, 2011 at 10:53
  • It's probably set to 1 because that is the default and you can't seem to chown files as a regular user.
    – Cakemox
    Feb 14, 2011 at 11:26
  • Note that the above is for Solaris 10 and earlier. Solaris 11 replaced the /etc/system global option with a rstchown mount option for each mount point.
    – alanc
    Jan 21, 2022 at 0:23

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