File Permission

[Andi Rigauer]

Hi All,

I'm not kidding you I ask this really serious.
I have a file belong to user1:group1 with the perm 700. Now I want to grant readrights to user2:group2 and I don't wanna change the File permission itself.
Ok I know this doesn't make sense at all, but maybe you know a solution how to do this.

Brgds
NAdi

[Robert-Jan Goossens]

Hi Nadi,

sudo ?

Regards,
Robert-Jan

[Jean-Louis Phelix]

Hi,

I don't think it's possible using standard permissions. You should rather look at ACLs (Access Control Lists). See man 5 acl.

Regards

[Jean-Louis Phelix]

Hi,

Listtle mistake ... man 5 acl concerns hfs acls. If vxfs, have a look to man 1 setacl (or getacl).

Regards.

[Andi Rigauer]

Ok ACL sounds good, maybe you can tell me more about it.
For instance I want that all files created in this directory are readable by everyone

Thanks

[Mark Grant]

I thought it might be worth pointing out something about ACL's here. Some backup software does not backup ACL information and I believe "tar" is one of those

[Jean-Louis Phelix · Accepted solution]

Andi,

You can simply use in your case

setacl user:user2:r-- file

and check with

getacl file

But Mark is right. There are some limitations also with NFS for example.

Regards.

[Bruno Ganino]

If suggestion of Jean-luis is right, you must check use of "chacl" for settings permission and "lsacl" for display it.

The command "chacl" is overlapped to command "chmod" and chacl adds permission specific to permission of "chmod".

If you use "chacl", you must use "chmod" with option "-A".

HTH
Bruno