src/login/logind-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 2012 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <unistd.h>
  23
  24 #include <systemd/sd-messages.h>
  25
  26 #include "conf-parser.h"
  27 #include "special.h"
  28 #include "dbus-common.h"
  29 #include "logind-action.h"
  30 #include "sleep-config.h"
  31
  32 int manager_handle_action(
  33                 Manager *m,
  34                 InhibitWhat inhibit_key,
  35                 HandleAction handle,
  36                 bool ignore_inhibited,
  37                 bool is_edge) {
  38
  39         static const char * const message_table[_HANDLE_ACTION_MAX] = {
  40                 [HANDLE_POWEROFF] = "Powering Off...",
  41                 [HANDLE_REBOOT] = "Rebooting...",
  42                 [HANDLE_HALT] = "Halting...",
  43                 [HANDLE_KEXEC] = "Rebooting via kexec...",
  44                 [HANDLE_SUSPEND] = "Suspending...",
  45                 [HANDLE_HIBERNATE] = "Hibernating...",
  46                 [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
  47         };
  48
  49         static const char * const target_table[_HANDLE_ACTION_MAX] = {
  50                 [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
  51                 [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
  52                 [HANDLE_HALT] = SPECIAL_HALT_TARGET,
  53                 [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
  54                 [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
  55                 [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
  56                 [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
  57         };
  58
  59         DBusError error;
  60         int r;
  61         InhibitWhat inhibit_operation;
  62         bool supported;
  63
  64         assert(m);
  65
  66         if (m->action_what) {
  67                 log_debug("Action already in progress, ignoring.");
  68                 return -EALREADY;
  69         }
  70
  71         /* If the key handling is turned off, don't do anything */
  72         if (handle == HANDLE_IGNORE) {
  73                 log_debug("Refusing operation, as it is turned off.");
  74                 return 0;
  75         }
  76
  77         if (handle == HANDLE_SUSPEND)
  78                 supported = can_sleep("suspend") > 0;
  79         else if (handle == HANDLE_HIBERNATE)
  80                 supported = can_sleep("hibernate") > 0;
  81         else if (handle == HANDLE_HYBRID_SLEEP)
  82                 supported = can_sleep("hybrid-sleep") > 0;
  83         else if (handle == HANDLE_KEXEC)
  84                 supported = access(KEXEC, X_OK) >= 0;
  85         else
  86                 supported = true;
  87
  88         if (!supported) {
  89                 log_warning("Requested operation not supported, ignoring.");
  90                 return -ENOTSUP;
  91         }
  92
  93         /* If the key handling is inhibited, don't do anything */
  94         if (inhibit_key > 0) {
  95                 if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0)) {
  96                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
  97                         return 0;
  98                 }
  99         }
 100
 101         /* Locking is handled differently from the rest. */
 102         if (handle == HANDLE_LOCK) {
 103                 log_info("Locking sessions...");
 104                 session_send_lock_all(m, true);
 105                 return 1;
 106         }
 107
 108         inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
 109
 110         /* If the actual operation is inhibited, warn and fail */
 111         if (!ignore_inhibited &&
 112             manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0)) {
 113
 114                 /* If this is just a recheck of the lid switch then don't warn about anything */
 115                 if (!is_edge) {
 116                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 117                         return 0;
 118                 }
 119
 120                 log_error("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 121                 warn_melody();
 122                 return -EPERM;
 123         }
 124
 125         log_info("%s", message_table[handle]);
 126
 127         dbus_error_init(&error);
 128         r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
 129         if (r < 0) {
 130                 log_error("Failed to execute operation: %s", bus_error_message(&error));
 131                 dbus_error_free(&error);
 132                 return r;
 133         }
 134
 135         return 1;
 136 }
 137
 138 static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
 139         [HANDLE_IGNORE] = "ignore",
 140         [HANDLE_POWEROFF] = "poweroff",
 141         [HANDLE_REBOOT] = "reboot",
 142         [HANDLE_HALT] = "halt",
 143         [HANDLE_KEXEC] = "kexec",
 144         [HANDLE_SUSPEND] = "suspend",
 145         [HANDLE_HIBERNATE] = "hibernate",
 146         [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
 147         [HANDLE_LOCK] = "lock"
 148 };
 149
 150 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
 151 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");