src/core/emergency-action.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sys/reboot.h>
   4
   5 #include "bus-error.h"
   6 #include "bus-util.h"
   7 #include "emergency-action.h"
   8 #include "raw-reboot.h"
   9 #include "reboot-util.h"
  10 #include "special.h"
  11 #include "string-table.h"
  12 #include "terminal-util.h"
  13 #include "virt.h"
  14
  15 static void log_and_status(Manager *m, bool warn, const char *message, const char *reason) {
  16         log_full(warn ? LOG_WARNING : LOG_DEBUG, "%s: %s", message, reason);
  17         if (warn)
  18                 manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  19                                       ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  20                                       "%s: %s", message, reason);
  21 }
  22
  23 int emergency_action(
  24                 Manager *m,
  25                 EmergencyAction action,
  26                 EmergencyActionFlags options,
  27                 const char *reboot_arg,
  28                 int exit_status,
  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 (FLAGS_SET(options, EMERGENCY_ACTION_IS_WATCHDOG) && !m->service_watchdogs) {
  39                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  40                 return -ECANCELED;
  41         }
  42
  43         bool warn = FLAGS_SET(options, EMERGENCY_ACTION_WARN);
  44
  45         switch (action) {
  46
  47         case EMERGENCY_ACTION_REBOOT:
  48                 log_and_status(m, warn, "Rebooting", reason);
  49
  50                 (void) update_reboot_parameter_and_warn(reboot_arg);
  51                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  52
  53                 break;
  54
  55         case EMERGENCY_ACTION_REBOOT_FORCE:
  56                 log_and_status(m, warn, "Forcibly rebooting", reason);
  57
  58                 (void) update_reboot_parameter_and_warn(reboot_arg);
  59                 m->objective = MANAGER_REBOOT;
  60
  61                 break;
  62
  63         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  64                 log_and_status(m, warn, "Rebooting immediately", reason);
  65
  66                 sync();
  67
  68                 if (!isempty(reboot_arg)) {
  69                         log_info("Rebooting with argument '%s'.", reboot_arg);
  70                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  71                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  72                 }
  73
  74                 log_info("Rebooting.");
  75                 (void) reboot(RB_AUTOBOOT);
  76                 break;
  77
  78         case EMERGENCY_ACTION_EXIT:
  79
  80                 if (exit_status >= 0)
  81                         m->return_value = exit_status;
  82
  83                 if (MANAGER_IS_USER(m) || detect_container() > 0) {
  84                         log_and_status(m, warn, "Exiting", reason);
  85                         (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_EXIT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  86                         break;
  87                 }
  88
  89                 log_notice("Doing \"poweroff\" action instead of an \"exit\" emergency action.");
  90                 _fallthrough_;
  91
  92         case EMERGENCY_ACTION_POWEROFF:
  93                 log_and_status(m, warn, "Powering off", reason);
  94                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  95                 break;
  96
  97         case EMERGENCY_ACTION_EXIT_FORCE:
  98
  99                 if (exit_status >= 0)
 100                         m->return_value = exit_status;
 101
 102                 if (MANAGER_IS_USER(m) || detect_container() > 0) {
 103                         log_and_status(m, warn, "Exiting immediately", reason);
 104                         m->objective = MANAGER_EXIT;
 105                         break;
 106                 }
 107
 108                 log_notice("Doing \"poweroff-force\" action instead of an \"exit-force\" emergency action.");
 109                 _fallthrough_;
 110
 111         case EMERGENCY_ACTION_POWEROFF_FORCE:
 112                 log_and_status(m, warn, "Forcibly powering off", reason);
 113                 m->objective = MANAGER_POWEROFF;
 114                 break;
 115
 116         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 117                 log_and_status(m, warn, "Powering off immediately", reason);
 118
 119                 sync();
 120
 121                 log_info("Powering off.");
 122                 (void) reboot(RB_POWER_OFF);
 123                 break;
 124
 125         default:
 126                 assert_not_reached("Unknown emergency action");
 127         }
 128
 129         return -ECANCELED;
 130 }
 131
 132 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 133         [EMERGENCY_ACTION_NONE] = "none",
 134         [EMERGENCY_ACTION_REBOOT] = "reboot",
 135         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 136         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 137         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 138         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 139         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate",
 140         [EMERGENCY_ACTION_EXIT] = "exit",
 141         [EMERGENCY_ACTION_EXIT_FORCE] = "exit-force",
 142 };
 143 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);
 144
 145 int parse_emergency_action(
 146                 const char *value,
 147                 bool system,
 148                 EmergencyAction *ret) {
 149
 150         EmergencyAction x;
 151
 152         x = emergency_action_from_string(value);
 153         if (x < 0)
 154                 return -EINVAL;
 155
 156         if (!system && x != EMERGENCY_ACTION_NONE && x < _EMERGENCY_ACTION_FIRST_USER_ACTION)
 157                 return -EOPNOTSUPP;
 158
 159         *ret = x;
 160         return 0;
 161 }