c3dacc8bbf
https://github.com/systemd/systemd/pull/2508#issuecomment-190901170 Maybe fixes https://bugzilla.redhat.com/show_bug.cgi?id=1308771.
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <unistd.h>
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#include "fileio.h"
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#include "fileio-label.h"
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#include "log.h"
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#include "selinux-util.h"
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#include "string-util.h"
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#include "util.h"
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int main(int argc, char*argv[]) {
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if (argc != 2) {
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log_error("This program requires one argument.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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mac_selinux_init();
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if (streq(argv[1], "start")) {
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int r = 0;
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if (unlink("/run/nologin") < 0 && errno != ENOENT)
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r = log_error_errno(errno,
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"Failed to remove /run/nologin file: %m");
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if (unlink("/etc/nologin") < 0 && errno != ENOENT) {
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/* If the file doesn't exist and /etc simply
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* was read-only (in which case unlink()
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* returns EROFS even if the file doesn't
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* exist), don't complain */
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if (errno != EROFS || access("/etc/nologin", F_OK) >= 0) {
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log_error_errno(errno, "Failed to remove /etc/nologin file: %m");
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return EXIT_FAILURE;
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}
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}
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if (r < 0)
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return EXIT_FAILURE;
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} else if (streq(argv[1], "stop")) {
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int r;
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r = write_string_file_atomic_label("/run/nologin", "System is going down.");
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if (r < 0) {
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log_error_errno(r, "Failed to create /run/nologin: %m");
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return EXIT_FAILURE;
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}
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} else {
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log_error("Unknown verb %s.", argv[1]);
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return EXIT_FAILURE;
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}
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mac_selinux_finish();
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return EXIT_SUCCESS;
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}
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