tar archive question

[Pocius Arturas]

When creating tar archive with options cvNfb
I can't get right user/groups ownership on files when verifying archive with options tvpfb.

Thanks.

[Steve Steel]

Hi

Are you doing this as root.

If not then chown may be disabled.
see setprivgrp


p Cause file to be restored to the original modes and ownerships written on the archive, if possible. This is the default for the superuser, and can be overridden by the o function modifier. If system protections prevent the ordinary user from executing chown(), the error is ignored,
and the ownership is set to that of the restoring process(see chown(2)). The set-user-id, set-group-id, and sticky bit information are restored as allowed by the protections
defined by chmod() if the chown() operation above succeeds.


Note.tar is an old and trusted program but not great for modern systems. fbackup is better

Steve steel

[Pocius Arturas]

I'm doing as root.
tar I'm using for portability.

Thanks.

[H.Merijn Brand (procura]

What are the largest UID and GID? Some tar's can't cope with large values (maxshort = 32767)

For compatibility switch to GNU tar (https:/www.beepz.com/personal/merijn)

[Pocius Arturas]

uid=102
gid=105

[john korterman]

Hi,

perhaps a silly question, but was the verification performed immediately after the archive was created?

regards,

John K.

[Pocius Arturas]

Yes.

[john korterman]

Hi again,

does the uid and guid you get listed during verification exist in /etc/passwd and /etc/group ? If yes, are the uids and guids unique in those files?

regards,

John K.

[Pocius Arturas]

Both exists and are unique.

Thanks

[H.Merijn Brand (procura]

Just out of curiousity (my mind is blank about what leads to your problem now), did you try GNU tar, and if not can you?

[john korterman]

Hi again,

please explain what is not right about the user/groups ownership - and is it for all files of the archive, or for certain types only?

regards,
John K.

[Pocius Arturas]

GNU tar solved the problem.

Thank all for answers.