1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
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.
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.
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/>.
24 #include "sd-messages.h"
28 #include "conf-parser.h"
29 // #include "special.h"
30 #include "sleep-config.h"
31 #include "bus-error.h"
33 #include "logind-action.h"
34 // #include "formats-util.h"
35 #include "process-util.h"
36 #include "terminal-util.h"
38 int manager_handle_action(
40 InhibitWhat inhibit_key,
42 bool ignore_inhibited,
45 static const char * const message_table[_HANDLE_ACTION_MAX] = {
46 [HANDLE_POWEROFF] = "Powering Off...",
47 [HANDLE_REBOOT] = "Rebooting...",
48 [HANDLE_HALT] = "Halting...",
49 [HANDLE_KEXEC] = "Rebooting via kexec...",
50 [HANDLE_SUSPEND] = "Suspending...",
51 [HANDLE_HIBERNATE] = "Hibernating...",
52 [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
55 /// elogind does this itself. No target table required
57 static const char * const target_table[_HANDLE_ACTION_MAX] = {
58 [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
59 [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
60 [HANDLE_HALT] = SPECIAL_HALT_TARGET,
61 [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
62 [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
63 [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
64 [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
68 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
69 InhibitWhat inhibit_operation;
70 Inhibitor *offending = NULL;
76 /* If the key handling is turned off, don't do anything */
77 if (handle == HANDLE_IGNORE) {
78 log_debug("Refusing operation, as it is turned off.");
82 if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) {
83 /* If the last system suspend or startup is too close,
84 * let's not suspend for now, to give USB docking
85 * stations some time to settle so that we can
86 * properly watch its displays. */
87 if (m->lid_switch_ignore_event_source) {
88 log_debug("Ignoring lid switch request, system startup or resume too close.");
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, NULL)) {
96 log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
101 /* Locking is handled differently from the rest. */
102 if (handle == HANDLE_LOCK) {
107 log_info("Locking sessions...");
108 session_send_lock_all(m, true);
112 if (handle == HANDLE_SUSPEND)
113 supported = can_sleep("suspend") > 0;
114 else if (handle == HANDLE_HIBERNATE)
115 supported = can_sleep("hibernate") > 0;
116 else if (handle == HANDLE_HYBRID_SLEEP)
117 supported = can_sleep("hybrid-sleep") > 0;
118 else if (handle == HANDLE_KEXEC)
119 supported = access(KEXEC, X_OK) >= 0;
124 log_warning("Requested operation not supported, ignoring.");
128 if (m->action_what) {
129 log_debug("Action already in progress, ignoring.");
133 inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
135 /* If the actual operation is inhibited, warn and fail */
136 if (!ignore_inhibited &&
137 manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) {
138 _cleanup_free_ char *comm = NULL, *u = NULL;
140 get_process_comm(offending->pid, &comm);
141 u = uid_to_name(offending->uid);
143 /* If this is just a recheck of the lid switch then don't warn about anything */
145 log_debug("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
146 inhibit_what_to_string(inhibit_operation),
147 offending->uid, strna(u),
148 offending->pid, strna(comm));
152 log_error("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
153 inhibit_what_to_string(inhibit_operation),
154 offending->uid, strna(u),
155 offending->pid, strna(comm));
161 log_info("%s", message_table[handle]);
163 /// elogind uses its own variant, which can use the handle directly.
165 r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
167 r = bus_manager_shutdown_or_sleep_now_or_later(m, handle, inhibit_operation, &error);
170 log_error("Failed to execute operation: %s", bus_error_message(&error, r));
177 static int run_helper(const char *helper) {
180 return log_error_errno(errno, "Failed to fork: %m");
186 close_all_fds(NULL, 0);
188 execlp(helper, helper, NULL);
189 log_error_errno(errno, "Failed to execute %s: %m", helper);
193 return wait_for_terminate_and_warn(helper, pid, true);
196 static int write_mode(char **modes) {
200 STRV_FOREACH(mode, modes) {
203 k = write_string_file("/sys/power/disk", *mode, 0);
207 log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
214 log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
219 static int write_state(FILE **f, char **states) {
223 STRV_FOREACH(state, states) {
226 k = write_string_stream(*f, *state, true);
229 log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
235 *f = fopen("/sys/power/state", "we");
237 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
243 static int do_sleep(const char *arg_verb, char **modes, char **states) {
244 char *arguments[] = {
250 static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
253 _cleanup_fclose_ FILE *f = NULL;
255 /* This file is opened first, so that if we hit an error,
256 * we can abort before modifying any state. */
257 f = fopen("/sys/power/state", "we");
259 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
261 /* Configure the hibernation mode */
262 r = write_mode(modes);
266 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
269 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START),
270 LOG_MESSAGE("Suspending system..."),
271 "SLEEP=%s", arg_verb,
274 r = write_state(&f, states);
279 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
280 LOG_MESSAGE("System resumed."),
281 "SLEEP=%s", arg_verb,
284 arguments[1] = (char*) "post";
285 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
290 int shutdown_or_sleep(Manager *m, HandleAction action) {
295 case HANDLE_POWEROFF:
296 return run_helper(HALT);
298 return run_helper(REBOOT);
300 return run_helper(HALT);
302 return run_helper(KEXEC);
304 return do_sleep("suspend", m->suspend_mode, m->suspend_state);
305 case HANDLE_HIBERNATE:
306 return do_sleep("hibernate", m->hibernate_mode, m->hibernate_state);
307 case HANDLE_HYBRID_SLEEP:
308 return do_sleep("hybrid-sleep", m->hybrid_sleep_mode, m->hybrid_sleep_state);
314 static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
315 [HANDLE_IGNORE] = "ignore",
316 [HANDLE_POWEROFF] = "poweroff",
317 [HANDLE_REBOOT] = "reboot",
318 [HANDLE_HALT] = "halt",
319 [HANDLE_KEXEC] = "kexec",
320 [HANDLE_SUSPEND] = "suspend",
321 [HANDLE_HIBERNATE] = "hibernate",
322 [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
323 [HANDLE_LOCK] = "lock"
326 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
327 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");