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 "sd-messages.h"
  25 #include "conf-parser.h"
  26 #include "special.h"
  27 #include "sleep-config.h"
  28 #include "bus-util.h"
  29 #include "bus-error.h"
  30 #include "logind-action.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         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
  60         InhibitWhat inhibit_operation;
  61         bool supported;
  62         int r;
  63
  64         assert(m);
  65
  66         /* If the key handling is turned off, don't do anything */
  67         if (handle == HANDLE_IGNORE) {
  68                 log_debug("Refusing operation, as it is turned off.");
  69                 return 0;
  70         }
  71
  72         /* If the key handling is inhibited, don't do anything */
  73         if (inhibit_key > 0) {
  74                 if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0)) {
  75                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
  76                         return 0;
  77                 }
  78         }
  79
  80         /* Locking is handled differently from the rest. */
  81         if (handle == HANDLE_LOCK) {
  82                 log_info("Locking sessions...");
  83                 session_send_lock_all(m, true);
  84                 return 1;
  85         }
  86
  87         if (handle == HANDLE_SUSPEND)
  88                 supported = can_sleep("suspend") > 0;
  89         else if (handle == HANDLE_HIBERNATE)
  90                 supported = can_sleep("hibernate") > 0;
  91         else if (handle == HANDLE_HYBRID_SLEEP)
  92                 supported = can_sleep("hybrid-sleep") > 0;
  93         else if (handle == HANDLE_KEXEC)
  94                 supported = access(KEXEC, X_OK) >= 0;
  95         else
  96                 supported = true;
  97
  98         if (!supported) {
  99                 log_warning("Requested operation not supported, ignoring.");
 100                 return -ENOTSUP;
 101         }
 102
 103         if (m->action_what) {
 104                 log_debug("Action already in progress, ignoring.");
 105                 return -EALREADY;
 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         r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
 128         if (r < 0) {
 129                 log_error("Failed to execute operation: %s", bus_error_message(&error, r));
 130                 return r;
 131         }
 132
 133         return 1;
 134 }
 135
 136 static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
 137         [HANDLE_IGNORE] = "ignore",
 138         [HANDLE_POWEROFF] = "poweroff",
 139         [HANDLE_REBOOT] = "reboot",
 140         [HANDLE_HALT] = "halt",
 141         [HANDLE_KEXEC] = "kexec",
 142         [HANDLE_SUSPEND] = "suspend",
 143         [HANDLE_HIBERNATE] = "hibernate",
 144         [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
 145         [HANDLE_LOCK] = "lock"
 146 };
 147
 148 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
 149 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");