/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include "fileio.h"
#include "fileio-label.h"
+#include "fs-util.h"
#include "log.h"
#include "selinux-util.h"
#include "string-util.h"
#include "util.h"
int main(int argc, char*argv[]) {
+ int r, k;
if (argc != 2) {
log_error("This program requires one argument.");
mac_selinux_init();
if (streq(argv[1], "start")) {
- int r = 0;
-
- if (unlink("/run/nologin") < 0 && errno != ENOENT)
- r = log_error_errno(errno,
- "Failed to remove /run/nologin file: %m");
-
- if (unlink("/etc/nologin") < 0 && errno != ENOENT) {
- /* If the file doesn't exist and /etc simply
- * was read-only (in which case unlink()
- * returns EROFS even if the file doesn't
- * exist), don't complain */
-
- if (errno != EROFS || access("/etc/nologin", F_OK) >= 0) {
- log_error_errno(errno, "Failed to remove /etc/nologin file: %m");
- return EXIT_FAILURE;
- }
- }
-
- if (r < 0)
- return EXIT_FAILURE;
-
- } else if (streq(argv[1], "stop")) {
- int r;
-
- r = write_string_file_atomic_label("/run/nologin", "System is going down.");
- if (r < 0) {
- log_error_errno(r, "Failed to create /run/nologin: %m");
- return EXIT_FAILURE;
- }
-
- } else {
- log_error("Unknown verb %s.", argv[1]);
- return EXIT_FAILURE;
+ r = unlink_or_warn("/run/nologin");
+ k = unlink_or_warn("/etc/nologin");
+ if (k < 0 && r >= 0)
+ r = k;
+
+ } else if (streq(argv[1], "stop"))
+ r = create_shutdown_run_nologin_or_warn();
+ else {
+ log_error("Unknown verb '%s'.", argv[1]);
+ r = -EINVAL;
}
mac_selinux_finish();
-
- return EXIT_SUCCESS;
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}