+/**
+ * @brief Determine if a file descriptor has a default ACL.
+ *
+ * @param fd
+ * The file descriptor whose default ACL is in question.
+ *
+ * @return
+ * - @c ACL_SUCCESS - If @c fd has a default ACL.
+ * - @c ACL_FAILURE - If @c fd does not have a default ACL.
+ * - @c ACL_ERROR - Unexpected library error.
+ */
+int has_default_acl_fd(int fd) {
+ if (fgetxattr(fd, XATTR_NAME_POSIX_ACL_DEFAULT, NULL, 0) == XATTR_ERROR) {
+ if (errno == ENODATA) {
+ return ACL_FAILURE;
+ }
+ perror("has_default_acl_fd (fgetxattr)");
+ return ACL_ERROR;
+ }
+
+ return ACL_SUCCESS;
+}
+
+