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We want to mimic the behavior of a system-wide 002 umask on a certain directory foo, in order to ensure the following result:

  1. All sub-directories created underneath foo will have 775 permissions
  2. All files created underneath foo and subdirectories will have 664 permissions
  3. 1 and 2 will happen for files/dirs created by all users, including root, and all daemons.

Assuming that ACL is enabled on our partition, this is the command we came up with:

setfacl -R -d -m mask:002 foo

... but this doesn't work. New files created in the directory end up looking like:

-rw--w-r--+

When I run getfacl on the new file, I get:

# file: newfile.py
# owner: root
# group: agroup
user::rw-
group::rwx #effective:-w-
mask::-w-
other::r--

In other words, applying a mask:200 with ACL is not the same as applying umask 200.

So is there a way to apply a per-directory umask with an ACL?

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1 Answer 1

You can use a dnotify and script triggered each time a file is created. See: http://serverfault.com/a/127686/30946

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