src/user-sessions/user-sessions.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8
   9 #include "fileio.h"
  10 #include "fileio-label.h"
  11 #include "fs-util.h"
  12 #include "main-func.h"
  13 #include "log.h"
  14 #include "selinux-util.h"
  15 #include "string-util.h"
  16
  17 static int run(int argc, char *argv[]) {
  18         int r;
  19
  20         if (argc != 2)
  21                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
  22                                        "This program requires one argument.");
  23
  24         log_setup();
  25
  26         umask(0022);
  27
  28         r = mac_init();
  29         if (r < 0)
  30                 return r;
  31
  32         /* We only touch /run/nologin. See create_shutdown_run_nologin_or_warn() for details. */
  33
  34         if (streq(argv[1], "start"))
  35                 return unlink_or_warn("/run/nologin");
  36         if (streq(argv[1], "stop"))
  37                 return create_shutdown_run_nologin_or_warn();
  38
  39         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb '%s'.", argv[1]);
  40 }
  41
  42 DEFINE_MAIN_FUNCTION(run);