Permissions on files in specific directory and subdirectories

[mrlizard123]

Hi,

I've looked but haven't been able to find an answer to my problem, if I've missed it and anyone knows where it's been posted already would appreciate a nudge in the right direction.

I have a server on my home LAN which has a folder to which multiple users have access. I want files that are created in this directory (and subdirectories) to have group write permissions by default when any user creates them. Using chmod g+s any files created in the directory inherit the group.

I realise that umask can do this but that would not be specific to this directory.

Can someone give me a pointer in the right direction? Do I need to use something like acl? If so can someone help me with the appropriate syntax assuming for arguments sake the folder is /some-folder and the group is users?

Thanks in advance!

[cdenley]

First edit /etc/fstab. Add ",acl" to the mount options for /. Reboot.

Assuming you want to give the admin group inherited write permissions to a directory named test:

sudo chgrp admin test
sudo chmod g+s test
sudo setfacl -d -m u::rwx,g::rx,o::rx,mask::rwx test
sudo setfacl -d -m g:admin:rwx test

[mrlizard123]

Thanks for the quick reply, I'll test this out when I am back at my home, unfortunately won't be able to test it for a couple of days.

Regarding changing the fstab options, does this apply still for jfs partitions? Or is it only for ext3?

[cdenley]

Thanks for the quick reply, I'll test this out when I am back at my home, unfortunately won't be able to test it for a couple of days.

Regarding changing the fstab options, does this apply still for jfs partitions? Or is it only for ext3?

The "acl" option is for ext3. I don't see a similar option for jfs, so I'm not sure how you would enable ACL support.

[bigbear2350]

I believe JFS has ACLS enabled by defualt and in fact i dont think they can be turned off.