src/user-sessions/user-sessions.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <sys/stat.h>
   4
   5 #include "fs-util.h"
   6 #include "label-util.h"
   7 #include "log.h"
   8 #include "main-func.h"
   9 #include "reboot-util.h"
  10 #include "string-util.h"
  11
  12 static int run(int argc, char *argv[]) {
  13         int r;
  14
  15         if (argc != 2)
  16                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  17                                        "This program requires one argument.");
  18
  19         log_setup();
  20
  21         umask(0022);
  22
  23         r = mac_init();
  24         if (r < 0)
  25                 return r;
  26
  27         /* We only touch /run/nologin. See create_shutdown_run_nologin_or_warn() for details. */
  28
  29         if (streq(argv[1], "start"))
  30                 return unlink_or_warn("/run/nologin");
  31         if (streq(argv[1], "stop"))
  32                 return create_shutdown_run_nologin_or_warn();
  33
  34         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb '%s'.", argv[1]);
  35 }
  36
  37 DEFINE_MAIN_FUNCTION(run);