src/core/failure-action.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7   Copyright 2012 Michael Olbrich
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <sys/reboot.h>
  24 #include <linux/reboot.h>
  25 #include <sys/syscall.h>
  26
  27 #include "bus-util.h"
  28 #include "bus-error.h"
  29 #include "special.h"
  30 #include "failure-action.h"
  31
  32 static void log_and_status(Manager *m, const char *message) {
  33         log_warning("%s", message);
  34         manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  35                               ANSI_HIGHLIGHT_RED_ON " !!  " ANSI_HIGHLIGHT_OFF,
  36                               "%s", message);
  37 }
  38
  39 int failure_action(
  40                 Manager *m,
  41                 FailureAction action,
  42                 const char *reboot_arg) {
  43
  44         int r;
  45
  46         assert(m);
  47         assert(action >= 0);
  48         assert(action < _FAILURE_ACTION_MAX);
  49
  50         if (action == FAILURE_ACTION_NONE)
  51                 return -ECANCELED;
  52
  53         if (m->running_as == SYSTEMD_USER) {
  54                 /* Downgrade all options to simply exiting if we run
  55                  * in user mode */
  56
  57                 log_warning("Exiting as result of failure.");
  58                 m->exit_code = MANAGER_EXIT;
  59                 return -ECANCELED;
  60         }
  61
  62         switch (action) {
  63
  64         case FAILURE_ACTION_REBOOT: {
  65                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
  66
  67                 log_and_status(m, "Rebooting as result of failure.");
  68
  69                 update_reboot_param_file(reboot_arg);
  70                 r = manager_add_job_by_name(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
  71                 if (r < 0)
  72                         log_error("Failed to reboot: %s.", bus_error_message(&error, r));
  73
  74                 break;
  75         }
  76
  77         case FAILURE_ACTION_REBOOT_FORCE:
  78                 log_and_status(m, "Forcibly rebooting as result of failure.");
  79
  80                 update_reboot_param_file(reboot_arg);
  81                 m->exit_code = MANAGER_REBOOT;
  82                 break;
  83
  84         case FAILURE_ACTION_REBOOT_IMMEDIATE:
  85                 log_and_status(m, "Rebooting immediately as result of failure.");
  86
  87                 sync();
  88
  89                 if (reboot_arg) {
  90                         log_info("Rebooting with argument '%s'.", reboot_arg);
  91                         syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  92                 }
  93
  94                 log_info("Rebooting.");
  95                 reboot(RB_AUTOBOOT);
  96                 break;
  97
  98         case FAILURE_ACTION_POWEROFF: {
  99                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
 100
 101                 log_and_status(m, "Powering off as result of failure.");
 102
 103                 r = manager_add_job_by_name(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE, true, &error, NULL);
 104                 if (r < 0)
 105                         log_error("Failed to poweroff: %s.", bus_error_message(&error, r));
 106
 107                 break;
 108         }
 109
 110         case FAILURE_ACTION_POWEROFF_FORCE:
 111                 log_and_status(m, "Forcibly powering off as result of failure.");
 112                 m->exit_code = MANAGER_POWEROFF;
 113                 break;
 114
 115         case FAILURE_ACTION_POWEROFF_IMMEDIATE:
 116                 log_and_status(m, "Powering off immediately as result of failure.");
 117
 118                 sync();
 119
 120                 log_info("Powering off.");
 121                 reboot(RB_POWER_OFF);
 122                 break;
 123
 124         default:
 125                 assert_not_reached("Unknown failure action");
 126         }
 127
 128         return -ECANCELED;
 129 }
 130
 131 static const char* const failure_action_table[_FAILURE_ACTION_MAX] = {
 132         [FAILURE_ACTION_NONE] = "none",
 133         [FAILURE_ACTION_REBOOT] = "reboot",
 134         [FAILURE_ACTION_REBOOT_FORCE] = "reboot-force",
 135         [FAILURE_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 136         [FAILURE_ACTION_POWEROFF] = "poweroff",
 137         [FAILURE_ACTION_POWEROFF_FORCE] = "poweroff-force",
 138         [FAILURE_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
 139 };
 140 DEFINE_STRING_TABLE_LOOKUP(failure_action, FailureAction);