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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <unistd.h>
#include "sd-messages.h"
#include "conf-parser.h"
#include "special.h"
#include "sleep-config.h"
#include "bus-util.h"
#include "bus-error.h"
#include "logind-action.h"
int manager_handle_action(
Manager *m,
InhibitWhat inhibit_key,
HandleAction handle,
bool ignore_inhibited,
bool is_edge) {
static const char * const message_table[_HANDLE_ACTION_MAX] = {
[HANDLE_POWEROFF] = "Powering Off...",
[HANDLE_REBOOT] = "Rebooting...",
[HANDLE_HALT] = "Halting...",
[HANDLE_KEXEC] = "Rebooting via kexec...",
[HANDLE_SUSPEND] = "Suspending...",
[HANDLE_HIBERNATE] = "Hibernating...",
[HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
};
static const char * const target_table[_HANDLE_ACTION_MAX] = {
[HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
[HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
[HANDLE_HALT] = SPECIAL_HALT_TARGET,
[HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
[HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
[HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
[HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
};
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
InhibitWhat inhibit_operation;
Inhibitor *offending = NULL;
bool supported;
int r;
assert(m);
/* If the key handling is turned off, don't do anything */
if (handle == HANDLE_IGNORE) {
log_debug("Refusing operation, as it is turned off.");
return 0;
}
if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) {
int n;
/* If we are docked don't react to lid closing */
if (manager_is_docked(m)) {
log_debug("Ignoring lid switch request, system is docked.");
return 0;
}
/* If we have more than one or no displays connected,
* don't react to lid closing. The no display case we
* treat like this under the assumption that there is
* no modern drm driver available. */
n = manager_count_displays(m);
if (n != 1) {
log_debug("Ignoring lid switch request, %i displays connected.", n);
return 0;
}
/* If the last system suspend or startup is too close,
* let's not suspend for now, to give USB docking
* stations some time to settle so that we can
* properly watch its displays. */
if (m->lid_switch_ignore_event_source) {
log_debug("Ignoring lid switch request, system startup or resume too close.");
return 0;
}
}
/* If the key handling is inhibited, don't do anything */
if (inhibit_key > 0) {
if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0, NULL)) {
log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
return 0;
}
}
/* Locking is handled differently from the rest. */
if (handle == HANDLE_LOCK) {
if (!is_edge)
return 0;
log_info("Locking sessions...");
session_send_lock_all(m, true);
return 1;
}
if (handle == HANDLE_SUSPEND)
supported = can_sleep("suspend") > 0;
else if (handle == HANDLE_HIBERNATE)
supported = can_sleep("hibernate") > 0;
else if (handle == HANDLE_HYBRID_SLEEP)
supported = can_sleep("hybrid-sleep") > 0;
else if (handle == HANDLE_KEXEC)
supported = access(KEXEC, X_OK) >= 0;
else
supported = true;
if (!supported) {
log_warning("Requested operation not supported, ignoring.");
return -ENOTSUP;
}
if (m->action_what) {
log_debug("Action already in progress, ignoring.");
return -EALREADY;
}
inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
/* If the actual operation is inhibited, warn and fail */
if (!ignore_inhibited &&
manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) {
_cleanup_free_ char *comm = NULL, *u = NULL;
get_process_comm(offending->pid, &comm);
u = uid_to_name(offending->uid);
/* If this is just a recheck of the lid switch then don't warn about anything */
if (!is_edge) {
log_debug("Refusing operation, %s is inhibited by UID %lu/%s, PID %lu/%s.",
inhibit_what_to_string(inhibit_operation),
(unsigned long) offending->uid, strna(u),
(unsigned long) offending->pid, strna(comm));
return 0;
}
log_error("Refusing operation, %s is inhibited by UID %lu/%s, PID %lu/%s.",
inhibit_what_to_string(inhibit_operation),
(unsigned long) offending->uid, strna(u),
(unsigned long) offending->pid, strna(comm));
warn_melody();
return -EPERM;
}
log_info("%s", message_table[handle]);
r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
if (r < 0) {
log_error("Failed to execute operation: %s", bus_error_message(&error, r));
return r;
}
return 1;
}
static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
[HANDLE_IGNORE] = "ignore",
[HANDLE_POWEROFF] = "poweroff",
[HANDLE_REBOOT] = "reboot",
[HANDLE_HALT] = "halt",
[HANDLE_KEXEC] = "kexec",
[HANDLE_SUSPEND] = "suspend",
[HANDLE_HIBERNATE] = "hibernate",
[HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
[HANDLE_LOCK] = "lock"
};
DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");
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