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;
  60
  61         assert(m);
  62
  63         if (m->action_what) {
  64                 log_debug("Action already in progress, ignoring.");
  65                 return -EALREADY;
  66         }
  67
  68         /* If the key handling is turned off, don't do anything */
  69         if (handle == HANDLE_IGNORE) {
  70                 log_debug("Refusing operation, as it is turned off.");
  71                 return 0;
  72         }
  73
  74         if (handle == HANDLE_SUSPEND)
  75                 supported = can_sleep("mem") > 0;
  76         else if (handle == HANDLE_HIBERNATE)
  77                 supported = can_sleep("disk") > 0;
  78         else if (handle == HANDLE_HYBRID_SLEEP)
  79                 supported = can_sleep("disk") > 0 && can_sleep_disk("suspend") > 0;
  80         else if (handle == HANDLE_KEXEC)
  81                 supported = access("/sbin/kexec", X_OK) >= 0;
  82         else
  83                 supported = true;
  84
  85         if (!supported) {
  86                 log_warning("Requested operation not supported, ignoring.");
  87                 return -ENOTSUP;
  88         }
  89
  90         /* If the key handling is inhibited, don't do anything */
  91         if (inhibit_key > 0) {
  92                 if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0)) {
  93                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
  94                         return 0;
  95                 }
  96         }
  97
  98         /* Locking is handled differently from the rest. */
  99         if (handle == HANDLE_LOCK) {
 100                 log_info("Locking sessions...");
 101                 session_send_lock_all(m, true);
 102                 return 1;
 103         }
 104
 105         inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
 106
 107         /* If the actual operation is inhibited, warn and fail */
 108         if (!ignore_inhibited &&
 109             manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0)) {
 110
 111                 /* If this is just a recheck of the lid switch then don't warn about anything */
 112                 if (!is_edge) {
 113                         log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 114                         return 0;
 115                 }
 116
 117                 log_error("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
 118                 warn_melody();
 119                 return -EPERM;
 120         }
 121
 122         log_info("%s", message_table[handle]);
 123
 124         dbus_error_init(&error);
 125         r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
 126         if (r < 0) {
 127                 log_error("Failed to execute operation: %s", bus_error_message(&error));
 128                 dbus_error_free(&error);
 129                 return r;
 130         }
 131
 132         return 1;
 133 }
 134
 135 static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
 136         [HANDLE_IGNORE] = "ignore",
 137         [HANDLE_POWEROFF] = "poweroff",
 138         [HANDLE_REBOOT] = "reboot",
 139         [HANDLE_HALT] = "halt",
 140         [HANDLE_KEXEC] = "kexec",
 141         [HANDLE_SUSPEND] = "suspend",
 142         [HANDLE_HIBERNATE] = "hibernate",
 143         [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
 144         [HANDLE_LOCK] = "lock"
 145 };
 146
 147 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
 148 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");