--- Libc/Libc-1725.40.4/libdarwin/stdio.c
+++ Libc/Libc-1353.11.2/libdarwin/stdio.c
@@ -64,63 +64,6 @@
 	}
 
 	return dfd;
-}
-
-os_fd_t
-claimfd_np(os_fd_t *fdp, const guardid_t *gdid, u_int gdflags)
-{
-	int ret = -1;
-	int fd = *fdp;
-
-	if (gdid) {
-		ret = change_fdguard_np(fd, NULL, 0, gdid, gdflags, NULL);
-		if (ret) {
-			os_crash("change_fdguard_np: %{darwin.errno}d", errno);
-		}
-	}
-
-	*fdp = -1;
-	return fd;
-}
-
-os_fd_t
-xferfd_np(os_fd_t *fdp, const guardid_t *gdid, u_int gdflags)
-{
-	int ret = -1;
-	int fd = *fdp;
-
-	ret = change_fdguard_np(fd, gdid, gdflags, NULL, 0, NULL);
-	if (ret) {
-		os_crash("change_fdguard_np: %{darwin.errno}d", errno);
-	}
-
-	*fdp = -1;
-	return fd;
-}
-
-void
-close_drop_np(os_fd_t *fdp, const guardid_t *gdid)
-{
-	int ret = -1;
-	int fd = *fdp;
-
-	if (gdid) {
-		ret = guarded_close_np(fd, gdid);
-	} else {
-		ret = close(fd);
-	}
-
-	posix_assert_zero(ret);
-	*fdp = -1;
-}
-
-void
-close_drop_optional_np(os_fd_t *fdp, const guardid_t *gdid)
-{
-	if (!os_fd_valid(*fdp)) {
-		return;
-	}
-	close_drop_np(fdp, gdid);
 }
 
 size_t