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 #include <linux/reboot.h>
  24
  25 #include "bus-error.h"
  26 #include "bus-util.h"
  27 #include "emergency-action.h"
  28 #include "special.h"
  29 #include "string-table.h"
  30 #include "terminal-util.h"
  31
  32 static void log_and_status(Manager *m, const char *message, const char *reason) {
  33         log_warning("%s: %s", message, reason);
  34         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  35                               ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  36                               "%s: %s", message, reason);
  37 }
  38
  39 int emergency_action(
  40                 Manager *m,
  41                 EmergencyAction action,
  42                 const char *reboot_arg,
  43                 const char *reason) {
  44
  45         assert(m);
  46         assert(action >= 0);
  47         assert(action < _EMERGENCY_ACTION_MAX);
  48
  49         if (action == EMERGENCY_ACTION_NONE)
  50                 return -ECANCELED;
  51
  52         if (!m->service_watchdogs) {
  53                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  54                 return -ECANCELED;
  55         }
  56
  57         if (!MANAGER_IS_SYSTEM(m)) {
  58                 /* Downgrade all options to simply exiting if we run
  59                  * in user mode */
  60
  61                 log_warning("Exiting: %s", reason);
  62                 m->exit_code = MANAGER_EXIT;
  63                 return -ECANCELED;
  64         }
  65
  66         switch (action) {
  67
  68         case EMERGENCY_ACTION_REBOOT:
  69                 log_and_status(m, "Rebooting", reason);
  70
  71                 (void) update_reboot_parameter_and_warn(reboot_arg);
  72                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  73
  74                 break;
  75
  76         case EMERGENCY_ACTION_REBOOT_FORCE:
  77                 log_and_status(m, "Forcibly rebooting", reason);
  78
  79                 (void) update_reboot_parameter_and_warn(reboot_arg);
  80                 m->exit_code = MANAGER_REBOOT;
  81
  82                 break;
  83
  84         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  85                 log_and_status(m, "Rebooting immediately", reason);
  86
  87                 sync();
  88
  89                 if (!isempty(reboot_arg)) {
  90                         log_info("Rebooting with argument '%s'.", reboot_arg);
  91                         syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  92                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  93                 }
  94
  95                 log_info("Rebooting.");
  96                 reboot(RB_AUTOBOOT);
  97                 break;
  98
  99         case EMERGENCY_ACTION_POWEROFF:
 100                 log_and_status(m, "Powering off", reason);
 101                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
 102                 break;
 103
 104         case EMERGENCY_ACTION_POWEROFF_FORCE:
 105                 log_and_status(m, "Forcibly powering off", reason);
 106                 m->exit_code = MANAGER_POWEROFF;
 107                 break;
 108
 109         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 110                 log_and_status(m, "Powering off immediately", reason);
 111
 112                 sync();
 113
 114                 log_info("Powering off.");
 115                 reboot(RB_POWER_OFF);
 116                 break;
 117
 118         default:
 119                 assert_not_reached("Unknown emergency action");
 120         }
 121
 122         return -ECANCELED;
 123 }
 124
 125 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 126         [EMERGENCY_ACTION_NONE] = "none",
 127         [EMERGENCY_ACTION_REBOOT] = "reboot",
 128         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 129         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 130         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 131         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 132         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 133 };
 134 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);