src/core/emergency-action.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2012 Michael Olbrich
   4 ***/
   5
   6 #include <sys/reboot.h>
   7
   8 #include "bus-error.h"
   9 #include "bus-util.h"
  10 #include "emergency-action.h"
  11 #include "raw-reboot.h"
  12 #include "reboot-util.h"
  13 #include "special.h"
  14 #include "string-table.h"
  15 #include "terminal-util.h"
  16
  17 static void log_and_status(Manager *m, const char *message, const char *reason) {
  18         log_warning("%s: %s", message, reason);
  19         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  20                               ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  21                               "%s: %s", message, reason);
  22 }
  23
  24 int emergency_action(
  25                 Manager *m,
  26                 EmergencyAction action,
  27                 const char *reboot_arg,
  28                 const char *reason) {
  29
  30         assert(m);
  31         assert(action >= 0);
  32         assert(action < _EMERGENCY_ACTION_MAX);
  33
  34         if (action == EMERGENCY_ACTION_NONE)
  35                 return -ECANCELED;
  36
  37         if (!m->service_watchdogs) {
  38                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  39                 return -ECANCELED;
  40         }
  41
  42         if (!MANAGER_IS_SYSTEM(m)) {
  43                 /* Downgrade all options to simply exiting if we run
  44                  * in user mode */
  45
  46                 log_warning("Exiting: %s", reason);
  47                 m->exit_code = MANAGER_EXIT;
  48                 return -ECANCELED;
  49         }
  50
  51         switch (action) {
  52
  53         case EMERGENCY_ACTION_REBOOT:
  54                 log_and_status(m, "Rebooting", reason);
  55
  56                 (void) update_reboot_parameter_and_warn(reboot_arg);
  57                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  58
  59                 break;
  60
  61         case EMERGENCY_ACTION_REBOOT_FORCE:
  62                 log_and_status(m, "Forcibly rebooting", reason);
  63
  64                 (void) update_reboot_parameter_and_warn(reboot_arg);
  65                 m->exit_code = MANAGER_REBOOT;
  66
  67                 break;
  68
  69         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  70                 log_and_status(m, "Rebooting immediately", reason);
  71
  72                 sync();
  73
  74                 if (!isempty(reboot_arg)) {
  75                         log_info("Rebooting with argument '%s'.", reboot_arg);
  76                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  77                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  78                 }
  79
  80                 log_info("Rebooting.");
  81                 (void) reboot(RB_AUTOBOOT);
  82                 break;
  83
  84         case EMERGENCY_ACTION_POWEROFF:
  85                 log_and_status(m, "Powering off", reason);
  86                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  87                 break;
  88
  89         case EMERGENCY_ACTION_POWEROFF_FORCE:
  90                 log_and_status(m, "Forcibly powering off", reason);
  91                 m->exit_code = MANAGER_POWEROFF;
  92                 break;
  93
  94         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
  95                 log_and_status(m, "Powering off immediately", reason);
  96
  97                 sync();
  98
  99                 log_info("Powering off.");
 100                 (void) reboot(RB_POWER_OFF);
 101                 break;
 102
 103         default:
 104                 assert_not_reached("Unknown emergency action");
 105         }
 106
 107         return -ECANCELED;
 108 }
 109
 110 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 111         [EMERGENCY_ACTION_NONE] = "none",
 112         [EMERGENCY_ACTION_REBOOT] = "reboot",
 113         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 114         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 115         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 116         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 117         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 118 };
 119 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);