src/user-sessions/user-sessions.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6 ***/
   7
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include "fileio.h"
  12 #include "fileio-label.h"
  13 #include "fs-util.h"
  14 #include "log.h"
  15 #include "selinux-util.h"
  16 #include "string-util.h"
  17 #include "util.h"
  18
  19 int main(int argc, char*argv[]) {
  20         int r, k;
  21
  22         if (argc != 2) {
  23                 log_error("This program requires one argument.");
  24                 return EXIT_FAILURE;
  25         }
  26
  27         log_set_target(LOG_TARGET_AUTO);
  28         log_parse_environment();
  29         log_open();
  30
  31         umask(0022);
  32
  33         mac_selinux_init();
  34
  35         if (streq(argv[1], "start")) {
  36                 r = unlink_or_warn("/run/nologin");
  37                 k = unlink_or_warn("/etc/nologin");
  38                 if (k < 0 && r >= 0)
  39                         r = k;
  40
  41         } else if (streq(argv[1], "stop"))
  42                 r = create_shutdown_run_nologin_or_warn();
  43         else {
  44                 log_error("Unknown verb '%s'.", argv[1]);
  45                 r = -EINVAL;
  46         }
  47
  48         mac_selinux_finish();
  49         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
  50 }