Querying for ACL on Linux

Is there any way to query ACLs on Linux programmatically? Given a file or directory, I have to check if an ACL exists for it and then find开发者_运维技巧 out the level of access granted to different users. All I could find on the net were the getfacl and setfacl command line utilities which are of no use to me. Also, what are the best practices I need to follow when working with ACLs?

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They are in the acl.h header. There are links out to each of the functions from here.

A few sample functions:

• acl_create_entry - create a new ACL entry
• acl_delete_entry - delete an ACL entry
• acl_get_entry - get an ACL entry

The functions are in libacl.