5430f7f2bc
We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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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 <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "log.h"
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#include "util.h"
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#include "cgroup-util.h"
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int main(int argc, char*argv[]) {
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int ret = EXIT_FAILURE;
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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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if (streq(argv[1], "start")) {
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int q = 0, r = 0;
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if (unlink("/run/nologin") < 0 && errno != ENOENT) {
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log_error("Failed to remove /run/nologin file: %m");
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r = -errno;
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}
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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("Failed to remove /etc/nologin file: %m");
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q = -errno;
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}
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}
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if (r < 0 || q < 0)
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goto finish;
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} else if (streq(argv[1], "stop")) {
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int r, q;
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char *cgroup_user_tree = NULL;
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if ((r = write_one_line_file_atomic("/run/nologin", "System is going down.")) < 0)
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log_error("Failed to create /run/nologin: %s", strerror(-r));
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if ((q = cg_get_user_path(&cgroup_user_tree)) < 0) {
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log_error("Failed to determine use path: %s", strerror(-q));
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goto finish;
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}
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q = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, cgroup_user_tree, true);
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free(cgroup_user_tree);
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if (q < 0) {
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log_error("Failed to kill sessions: %s", strerror(-q));
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goto finish;
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}
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if (r < 0)
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goto finish;
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} else {
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log_error("Unknown verb %s.", argv[1]);
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goto finish;
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}
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ret = EXIT_SUCCESS;
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finish:
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return ret;
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}
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