1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Program that atomically exchanges two paths using
4 * the renameat2() system call RENAME_EXCHANGE flag.
5 *
6 * Copyright 2022 Red Hat Inc.
7 * Author: Javier Martinez Canillas <javierm@redhat.com>
8 */
9
10 #define _GNU_SOURCE
11 #include <fcntl.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14
15 void print_usage(const char *program)
16 {
17 printf("Usage: %s [oldpath] [newpath]\n", program);
18 printf("Atomically exchange oldpath and newpath\n");
19 }
20
21 int main(int argc, char *argv[])
22 {
23 int ret;
24
25 if (argc != 3) {
26 print_usage(argv[0]);
27 exit(EXIT_FAILURE);
28 }
29
30 ret = renameat2(AT_FDCWD, argv[1], AT_FDCWD, argv[2], RENAME_EXCHANGE);
31 if (ret) {
32 perror("rename exchange failed");
33 exit(EXIT_FAILURE);
34 }
35
36 exit(EXIT_SUCCESS);
37 }
38
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.