+int calc_acl_mask_if_needed(acl_t *acl_p) {
+ acl_entry_t i;
+ int found;
+
+ assert(acl_p);
+
+ for (found = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i);
+ found > 0;
+ found = acl_get_entry(*acl_p, ACL_NEXT_ENTRY, &i)) {
+
+ acl_tag_t tag;
+
+ if (acl_get_tag_type(i, &tag) < 0)
+ return -errno;
+
+ if (tag == ACL_MASK)
+ return 0;
+ }
+
+ if (found < 0)
+ return -errno;
+
+ if (acl_calc_mask(acl_p) < 0)
+ return -errno;
+
+ return 0;
+}
+