src/core/emergency-action.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2014 Lennart Poettering
   4   Copyright 2012 Michael Olbrich
   5 ***/
   6
   7 #include <sys/reboot.h>
   8
   9 #include "bus-error.h"
  10 #include "bus-util.h"
  11 #include "emergency-action.h"
  12 #include "raw-reboot.h"
  13 #include "reboot-util.h"
  14 #include "special.h"
  15 #include "string-table.h"
  16 #include "terminal-util.h"
  17
  18 static void log_and_status(Manager *m, const char *message, const char *reason) {
  19         log_warning("%s: %s", message, reason);
  20         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  21                               ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  22                               "%s: %s", message, reason);
  23 }
  24
  25 int emergency_action(
  26                 Manager *m,
  27                 EmergencyAction action,
  28                 const char *reboot_arg,
  29                 const char *reason) {
  30
  31         assert(m);
  32         assert(action >= 0);
  33         assert(action < _EMERGENCY_ACTION_MAX);
  34
  35         if (action == EMERGENCY_ACTION_NONE)
  36                 return -ECANCELED;
  37
  38         if (!m->service_watchdogs) {
  39                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  40                 return -ECANCELED;
  41         }
  42
  43         if (!MANAGER_IS_SYSTEM(m)) {
  44                 /* Downgrade all options to simply exiting if we run
  45                  * in user mode */
  46
  47                 log_warning("Exiting: %s", reason);
  48                 m->exit_code = MANAGER_EXIT;
  49                 return -ECANCELED;
  50         }
  51
  52         switch (action) {
  53
  54         case EMERGENCY_ACTION_REBOOT:
  55                 log_and_status(m, "Rebooting", reason);
  56
  57                 (void) update_reboot_parameter_and_warn(reboot_arg);
  58                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  59
  60                 break;
  61
  62         case EMERGENCY_ACTION_REBOOT_FORCE:
  63                 log_and_status(m, "Forcibly rebooting", reason);
  64
  65                 (void) update_reboot_parameter_and_warn(reboot_arg);
  66                 m->exit_code = MANAGER_REBOOT;
  67
  68                 break;
  69
  70         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  71                 log_and_status(m, "Rebooting immediately", reason);
  72
  73                 sync();
  74
  75                 if (!isempty(reboot_arg)) {
  76                         log_info("Rebooting with argument '%s'.", reboot_arg);
  77                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  78                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  79                 }
  80
  81                 log_info("Rebooting.");
  82                 (void) reboot(RB_AUTOBOOT);
  83                 break;
  84
  85         case EMERGENCY_ACTION_POWEROFF:
  86                 log_and_status(m, "Powering off", reason);
  87                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  88                 break;
  89
  90         case EMERGENCY_ACTION_POWEROFF_FORCE:
  91                 log_and_status(m, "Forcibly powering off", reason);
  92                 m->exit_code = MANAGER_POWEROFF;
  93                 break;
  94
  95         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
  96                 log_and_status(m, "Powering off immediately", reason);
  97
  98                 sync();
  99
 100                 log_info("Powering off.");
 101                 (void) reboot(RB_POWER_OFF);
 102                 break;
 103
 104         default:
 105                 assert_not_reached("Unknown emergency action");
 106         }
 107
 108         return -ECANCELED;
 109 }
 110
 111 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 112         [EMERGENCY_ACTION_NONE] = "none",
 113         [EMERGENCY_ACTION_REBOOT] = "reboot",
 114         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 115         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 116         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 117         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 118         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 119 };
 120 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);