The sys/acl.h header enables users to manipulate ACLs. It also declares the following functions:
| acl_create_entry() | acl_delete_entry() | acl_delete_fd() | acl_delete_file() |
| acl_first_entry() | acl_free() | acl_from_text() | acl_get_entry() |
| acl_get_fd() | acl_get_file() | acl_init() | acl_set_fd() |
| acl_set_file() | acl_sort() | acl_to_text() | acl_update_entry() |
| acl_valid() |