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 (!MANAGER_IS_SYSTEM(m)) {
  53                 /* Downgrade all options to simply exiting if we run
  54                  * in user mode */
  55
  56                 log_warning("Exiting: %s", reason);
  57                 m->exit_code = MANAGER_EXIT;
  58                 return -ECANCELED;
  59         }
  60
  61         switch (action) {
  62
  63         case EMERGENCY_ACTION_REBOOT:
  64                 log_and_status(m, "Rebooting", reason);
  65
  66                 (void) update_reboot_parameter_and_warn(reboot_arg);
  67                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  68
  69                 break;
  70
  71         case EMERGENCY_ACTION_REBOOT_FORCE:
  72                 log_and_status(m, "Forcibly rebooting", reason);
  73
  74                 (void) update_reboot_parameter_and_warn(reboot_arg);
  75                 m->exit_code = MANAGER_REBOOT;
  76
  77                 break;
  78
  79         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  80                 log_and_status(m, "Rebooting immediately", reason);
  81
  82                 sync();
  83
  84                 if (!isempty(reboot_arg)) {
  85                         log_info("Rebooting with argument '%s'.", reboot_arg);
  86                         syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  87                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  88                 }
  89
  90                 log_info("Rebooting.");
  91                 reboot(RB_AUTOBOOT);
  92                 break;
  93
  94         case EMERGENCY_ACTION_POWEROFF:
  95                 log_and_status(m, "Powering off", reason);
  96                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  97                 break;
  98
  99         case EMERGENCY_ACTION_POWEROFF_FORCE:
 100                 log_and_status(m, "Forcibly powering off", reason);
 101                 m->exit_code = MANAGER_POWEROFF;
 102                 break;
 103
 104         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 105                 log_and_status(m, "Powering off immediately", reason);
 106
 107                 sync();
 108
 109                 log_info("Powering off.");
 110                 reboot(RB_POWER_OFF);
 111                 break;
 112
 113         default:
 114                 assert_not_reached("Unknown emergency action");
 115         }
 116
 117         return -ECANCELED;
 118 }
 119
 120 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 121         [EMERGENCY_ACTION_NONE] = "none",
 122         [EMERGENCY_ACTION_REBOOT] = "reboot",
 123         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 124         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 125         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 126         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 127         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 128 };
 129 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);