src/core/failure-action.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7   Copyright 2012 Michael Olbrich
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <sys/reboot.h>
  24 #include <linux/reboot.h>
  25 #include <sys/syscall.h>
  26
  27 #include "bus-util.h"
  28 #include "bus-error.h"
  29 #include "special.h"
  30 #include "failure-action.h"
  31
  32 int failure_action(
  33                 Manager *m,
  34                 FailureAction action,
  35                 const char *reboot_arg) {
  36
  37         int r;
  38
  39         assert(m);
  40         assert(action >= 0);
  41         assert(action < _FAILURE_ACTION_MAX);
  42
  43         if (action == FAILURE_ACTION_NONE)
  44                 return -ECANCELED;
  45
  46         if (m->running_as == SYSTEMD_USER) {
  47                 /* Downgrade all options to simply exiting if we run
  48                  * in user mode */
  49
  50                 log_warning("Exiting as result of failure.");
  51                 m->exit_code = MANAGER_EXIT;
  52                 return -ECANCELED;
  53         }
  54
  55         switch (action) {
  56
  57         case FAILURE_ACTION_REBOOT: {
  58                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
  59
  60                 log_warning("Rebooting as result of failure.");
  61
  62                 update_reboot_param_file(reboot_arg);
  63                 r = manager_add_job_by_name(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
  64                 if (r < 0)
  65                         log_error("Failed to reboot: %s.", bus_error_message(&error, r));
  66
  67                 break;
  68         }
  69
  70         case FAILURE_ACTION_REBOOT_FORCE:
  71                 log_warning("Forcibly rebooting as result of failure.");
  72                 update_reboot_param_file(reboot_arg);
  73                 m->exit_code = MANAGER_REBOOT;
  74                 break;
  75
  76         case FAILURE_ACTION_REBOOT_IMMEDIATE:
  77                 log_warning("Rebooting immediately as result of failure.");
  78
  79                 sync();
  80
  81                 if (reboot_arg) {
  82                         log_info("Rebooting with argument '%s'.", reboot_arg);
  83                         syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  84                 }
  85
  86                 log_info("Rebooting.");
  87                 reboot(RB_AUTOBOOT);
  88                 break;
  89
  90         case FAILURE_ACTION_POWEROFF: {
  91                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
  92
  93                 log_warning("Powering off as result of failure.");
  94
  95                 r = manager_add_job_by_name(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE, true, &error, NULL);
  96                 if (r < 0)
  97                         log_error("Failed to poweroff: %s.", bus_error_message(&error, r));
  98
  99                 break;
 100         }
 101
 102         case FAILURE_ACTION_POWEROFF_FORCE:
 103                 log_warning("Forcibly powering off as result of failure.");
 104                 m->exit_code = MANAGER_POWEROFF;
 105                 break;
 106
 107         case FAILURE_ACTION_POWEROFF_IMMEDIATE:
 108                 log_warning("Powering off immediately as result of failure.");
 109
 110                 sync();
 111
 112                 log_info("Powering off.");
 113                 reboot(RB_POWER_OFF);
 114                 break;
 115
 116         default:
 117                 assert_not_reached("Unknown failure action");
 118         }
 119
 120         return -ECANCELED;
 121 }
 122
 123 static const char* const failure_action_table[_FAILURE_ACTION_MAX] = {
 124         [FAILURE_ACTION_NONE] = "none",
 125         [FAILURE_ACTION_REBOOT] = "reboot",
 126         [FAILURE_ACTION_REBOOT_FORCE] = "reboot-force",
 127         [FAILURE_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 128         [FAILURE_ACTION_POWEROFF] = "poweroff",
 129         [FAILURE_ACTION_POWEROFF_FORCE] = "poweroff-force",
 130         [FAILURE_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 131 };
 132 DEFINE_STRING_TABLE_LOOKUP(failure_action, FailureAction);