src/core/emergency-action.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2014 Lennart Poettering
   5   Copyright 2012 Michael Olbrich
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include <sys/reboot.h>
  22 #include <linux/reboot.h>
  23
  24 #include "bus-error.h"
  25 #include "bus-util.h"
  26 #include "emergency-action.h"
  27 #include "special.h"
  28 #include "string-table.h"
  29 #include "terminal-util.h"
  30
  31 static void log_and_status(Manager *m, const char *message, const char *reason) {
  32         log_warning("%s: %s", message, reason);
  33         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  34                               ANSI_HIGHLIGHT_RED " !!  " ANSI_NORMAL,
  35                               "%s: %s", message, reason);
  36 }
  37
  38 int emergency_action(
  39                 Manager *m,
  40                 EmergencyAction action,
  41                 const char *reboot_arg,
  42                 const char *reason) {
  43
  44         assert(m);
  45         assert(action >= 0);
  46         assert(action < _EMERGENCY_ACTION_MAX);
  47
  48         if (action == EMERGENCY_ACTION_NONE)
  49                 return -ECANCELED;
  50
  51         if (!MANAGER_IS_SYSTEM(m)) {
  52                 /* Downgrade all options to simply exiting if we run
  53                  * in user mode */
  54
  55                 log_warning("Exiting: %s", reason);
  56                 m->exit_code = MANAGER_EXIT;
  57                 return -ECANCELED;
  58         }
  59
  60         switch (action) {
  61
  62         case EMERGENCY_ACTION_REBOOT:
  63                 log_and_status(m, "Rebooting", reason);
  64
  65                 (void) update_reboot_parameter_and_warn(reboot_arg);
  66                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  67
  68                 break;
  69
  70         case EMERGENCY_ACTION_REBOOT_FORCE:
  71                 log_and_status(m, "Forcibly rebooting", reason);
  72
  73                 (void) update_reboot_parameter_and_warn(reboot_arg);
  74                 m->exit_code = MANAGER_REBOOT;
  75
  76                 break;
  77
  78         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  79                 log_and_status(m, "Rebooting immediately", reason);
  80
  81                 sync();
  82
  83                 if (!isempty(reboot_arg)) {
  84                         log_info("Rebooting with argument '%s'.", reboot_arg);
  85                         syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  86                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  87                 }
  88
  89                 log_info("Rebooting.");
  90                 reboot(RB_AUTOBOOT);
  91                 break;
  92
  93         case EMERGENCY_ACTION_POWEROFF:
  94                 log_and_status(m, "Powering off", reason);
  95                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  96                 break;
  97
  98         case EMERGENCY_ACTION_POWEROFF_FORCE:
  99                 log_and_status(m, "Forcibly powering off", reason);
 100                 m->exit_code = MANAGER_POWEROFF;
 101                 break;
 102
 103         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 104                 log_and_status(m, "Powering off immediately", reason);
 105
 106                 sync();
 107
 108                 log_info("Powering off.");
 109                 reboot(RB_POWER_OFF);
 110                 break;
 111
 112         default:
 113                 assert_not_reached("Unknown emergency action");
 114         }
 115
 116         return -ECANCELED;
 117 }
 118
 119 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 120         [EMERGENCY_ACTION_NONE] = "none",
 121         [EMERGENCY_ACTION_REBOOT] = "reboot",
 122         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 123         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 124         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 125         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 126         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 127 };
 128 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);