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 "conf-parser.h"
  25 #include "special.h"
  26 #include "dbus-common.h"
  27 #include "logind-action.h"
  28
  29 int manager_handle_action(
  30                 Manager *m,
  31                 InhibitWhat inhibit_key,
  32                 HandleAction handle,
  33                 bool ignore_inhibited,
  34                 bool is_edge) {
  35
  36         static const char * const message_table[_HANDLE_ACTION_MAX] = {
  37                 [HANDLE_POWEROFF] = "Powering Off...",
  38                 [HANDLE_REBOOT] = "Rebooting...",
  39                 [HANDLE_HALT] = "Halting...",
  40                 [HANDLE_KEXEC] = "Rebooting via kexec...",
  41                 [HANDLE_SUSPEND] = "Suspending...",
  42                 [HANDLE_HIBERNATE] = "Hibernating...",
  43                 [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
  44         };
  45
  46         static const char * const target_table[_HANDLE_ACTION_MAX] = {
  47                 [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
  48                 [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
  49                 [HANDLE_HALT] = SPECIAL_HALT_TARGET,
  50                 [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
  51                 [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
  52                 [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
  53                 [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
  54         };
  55
  56         DBusError error;
  57         int r;
  58         InhibitWhat inhibit_operation;
  59         bool supported = true;
  60
  61         assert(m);
  62
  63         /* If the key handling is turned off, don't do anything */
  64         if (handle == HANDLE_IGNORE) {
  65                 log_debug("Refusing operation, as it is turned off.");
  66                 return 0;
  67         }
  68
  69         if (handle == HANDLE_SUSPEND)
  70                 supported = can_sleep("mem") > 0;
  71         else if (handle == HANDLE_HIBERNATE)
  72                 supported = can_sleep("disk") > 0;
  73         else if (handle == HANDLE_HYBRID_SLEEP)
  74                 supported = can_sleep("disk") > 0 && can_sleep_disk("suspend") > 0;
  75         else if (handle == HANDLE_KEXEC)
  76                 supported = access("/sbin/kexec", X_OK) >= 0;
  77
  78         if (!supported) {
  79                 log_warning("Requested operation not supported, ignoring.");
  80                 return -ENOTSUP;
  81         }
  82
  83         /* If the key handling is inhibited, don't do anything */
  84         if (inhibit_key > 0) {
  85                 if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0)) {
  86                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
  87                         return 0;
  88                 }
  89         }
  90
  91         /* Locking is handled differently from the rest. */
  92         if (handle == HANDLE_LOCK) {
  93                 log_info("Locking sessions...");
  94                 session_send_lock_all(m, true);
  95                 return 1;
  96         }
  97
  98         inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
  99
 100         /* If the actual operation is inhibited, warn and fail */
 101         if (!ignore_inhibited &&
 102             manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0)) {
 103
 104                 /* If this is just a recheck of the lid switch then don't warn about anything */
 105                 if (!is_edge) {
 106                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 107                         return 0;
 108                 }
 109
 110                 log_error("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 111                 warn_melody();
 112                 return -EPERM;
 113         }
 114
 115         log_info("%s", message_table[handle]);
 116
 117         dbus_error_init(&error);
 118         r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
 119         if (r < 0) {
 120                 log_error("Failed to execute operation: %s", bus_error_message(&error));
 121                 dbus_error_free(&error);
 122                 return r;
 123         }
 124
 125         return 1;
 126 }
 127
 128 static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
 129         [HANDLE_IGNORE] = "ignore",
 130         [HANDLE_POWEROFF] = "poweroff",
 131         [HANDLE_REBOOT] = "reboot",
 132         [HANDLE_HALT] = "halt",
 133         [HANDLE_KEXEC] = "kexec",
 134         [HANDLE_SUSPEND] = "suspend",
 135         [HANDLE_HIBERNATE] = "hibernate",
 136         [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
 137         [HANDLE_LOCK] = "lock"
 138 };
 139
 140 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
 141 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");