src/core/emergency-action.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2014 Lennart Poettering
   6   Copyright 2012 Michael Olbrich
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/reboot.h>
  23
  24 #include "bus-error.h"
  25 #include "bus-util.h"
  26 #include "emergency-action.h"
  27 #include "raw-reboot.h"
  28 #include "reboot-util.h"
  29 #include "special.h"
  30 #include "string-table.h"
  31 #include "terminal-util.h"
  32
  33 static void log_and_status(Manager *m, const char *message, const char *reason) {
  34         log_warning("%s: %s", message, reason);
  35         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  36                               ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  37                               "%s: %s", message, reason);
  38 }
  39
  40 int emergency_action(
  41                 Manager *m,
  42                 EmergencyAction action,
  43                 const char *reboot_arg,
  44                 const char *reason) {
  45
  46         assert(m);
  47         assert(action >= 0);
  48         assert(action < _EMERGENCY_ACTION_MAX);
  49
  50         if (action == EMERGENCY_ACTION_NONE)
  51                 return -ECANCELED;
  52
  53         if (!m->service_watchdogs) {
  54                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  55                 return -ECANCELED;
  56         }
  57
  58         if (!MANAGER_IS_SYSTEM(m)) {
  59                 /* Downgrade all options to simply exiting if we run
  60                  * in user mode */
  61
  62                 log_warning("Exiting: %s", reason);
  63                 m->exit_code = MANAGER_EXIT;
  64                 return -ECANCELED;
  65         }
  66
  67         switch (action) {
  68
  69         case EMERGENCY_ACTION_REBOOT:
  70                 log_and_status(m, "Rebooting", reason);
  71
  72                 (void) update_reboot_parameter_and_warn(reboot_arg);
  73                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  74
  75                 break;
  76
  77         case EMERGENCY_ACTION_REBOOT_FORCE:
  78                 log_and_status(m, "Forcibly rebooting", reason);
  79
  80                 (void) update_reboot_parameter_and_warn(reboot_arg);
  81                 m->exit_code = MANAGER_REBOOT;
  82
  83                 break;
  84
  85         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  86                 log_and_status(m, "Rebooting immediately", reason);
  87
  88                 sync();
  89
  90                 if (!isempty(reboot_arg)) {
  91                         log_info("Rebooting with argument '%s'.", reboot_arg);
  92                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  93                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  94                 }
  95
  96                 log_info("Rebooting.");
  97                 (void) reboot(RB_AUTOBOOT);
  98                 break;
  99
 100         case EMERGENCY_ACTION_POWEROFF:
 101                 log_and_status(m, "Powering off", reason);
 102                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
 103                 break;
 104
 105         case EMERGENCY_ACTION_POWEROFF_FORCE:
 106                 log_and_status(m, "Forcibly powering off", reason);
 107                 m->exit_code = MANAGER_POWEROFF;
 108                 break;
 109
 110         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 111                 log_and_status(m, "Powering off immediately", reason);
 112
 113                 sync();
 114
 115                 log_info("Powering off.");
 116                 (void) reboot(RB_POWER_OFF);
 117                 break;
 118
 119         default:
 120                 assert_not_reached("Unknown emergency action");
 121         }
 122
 123         return -ECANCELED;
 124 }
 125
 126 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 127         [EMERGENCY_ACTION_NONE] = "none",
 128         [EMERGENCY_ACTION_REBOOT] = "reboot",
 129         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 130         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 131         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 132         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 133         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 134 };
 135 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);