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17. Access Control Lists > Default ACLs and File Creation

Default ACLs and File Creation

In the discussion of ACLs so far, we have been describing access ACLs. As its name implies, an access ACL is used in determining the permissions that a process has when accessing the file associated with the ACL. We can create a second type of ACL on directories: a default ACL.

A default ACL plays no part in determining the permissions granted when accessing the directory. Instead, its presence or absence determines the ACL(s) and permissions that are placed on files and subdirectories that are created in the directory. (A default ACL is stored as an extended attribute named system.posix_acl_default.)


  

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