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
   9 #include <sys/reboot.h>
  10
  11 #include "bus-error.h"
  12 #include "bus-util.h"
  13 #include "emergency-action.h"
  14 #include "raw-reboot.h"
  15 #include "reboot-util.h"
  16 #include "special.h"
  17 #include "string-table.h"
  18 #include "terminal-util.h"
  19
  20 static void log_and_status(Manager *m, const char *message, const char *reason) {
  21         log_warning("%s: %s", message, reason);
  22         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  23                               ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  24                               "%s: %s", message, reason);
  25 }
  26
  27 int emergency_action(
  28                 Manager *m,
  29                 EmergencyAction action,
  30                 const char *reboot_arg,
  31                 const char *reason) {
  32
  33         assert(m);
  34         assert(action >= 0);
  35         assert(action < _EMERGENCY_ACTION_MAX);
  36
  37         if (action == EMERGENCY_ACTION_NONE)
  38                 return -ECANCELED;
  39
  40         if (!m->service_watchdogs) {
  41                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  42                 return -ECANCELED;
  43         }
  44
  45         if (!MANAGER_IS_SYSTEM(m)) {
  46                 /* Downgrade all options to simply exiting if we run
  47                  * in user mode */
  48
  49                 log_warning("Exiting: %s", reason);
  50                 m->exit_code = MANAGER_EXIT;
  51                 return -ECANCELED;
  52         }
  53
  54         switch (action) {
  55
  56         case EMERGENCY_ACTION_REBOOT:
  57                 log_and_status(m, "Rebooting", reason);
  58
  59                 (void) update_reboot_parameter_and_warn(reboot_arg);
  60                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  61
  62                 break;
  63
  64         case EMERGENCY_ACTION_REBOOT_FORCE:
  65                 log_and_status(m, "Forcibly rebooting", reason);
  66
  67                 (void) update_reboot_parameter_and_warn(reboot_arg);
  68                 m->exit_code = MANAGER_REBOOT;
  69
  70                 break;
  71
  72         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  73                 log_and_status(m, "Rebooting immediately", reason);
  74
  75                 sync();
  76
  77                 if (!isempty(reboot_arg)) {
  78                         log_info("Rebooting with argument '%s'.", reboot_arg);
  79                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  80                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  81                 }
  82
  83                 log_info("Rebooting.");
  84                 (void) reboot(RB_AUTOBOOT);
  85                 break;
  86
  87         case EMERGENCY_ACTION_POWEROFF:
  88                 log_and_status(m, "Powering off", reason);
  89                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  90                 break;
  91
  92         case EMERGENCY_ACTION_POWEROFF_FORCE:
  93                 log_and_status(m, "Forcibly powering off", reason);
  94                 m->exit_code = MANAGER_POWEROFF;
  95                 break;
  96
  97         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
  98                 log_and_status(m, "Powering off immediately", reason);
  99
 100                 sync();
 101
 102                 log_info("Powering off.");
 103                 (void) reboot(RB_POWER_OFF);
 104                 break;
 105
 106         default:
 107                 assert_not_reached("Unknown emergency action");
 108         }
 109
 110         return -ECANCELED;
 111 }
 112
 113 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 114         [EMERGENCY_ACTION_NONE] = "none",
 115         [EMERGENCY_ACTION_REBOOT] = "reboot",
 116         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 117         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 118         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 119         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 120         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 121 };
 122 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);