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/>.
26 #include <sys/ioctl.h>
28 #include <linux/input.h>
29 #include <sys/epoll.h>
31 #include "conf-parser.h"
33 #include "logind-button.h"
35 #include "dbus-common.h"
37 Button* button_new(Manager *m, const char *name) {
47 b->name = strdup(name);
53 if (hashmap_put(m->buttons, b->name, b) < 0) {
65 void button_free(Button *b) {
68 hashmap_remove(b->manager->buttons, b->name);
71 hashmap_remove(b->manager->button_fds, INT_TO_PTR(b->fd + 1));
72 assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0);
73 close_nointr_nofail(b->fd);
81 int button_set_seat(Button *b, const char *sn) {
97 int button_open(Button *b) {
99 struct epoll_event ev;
105 close_nointr_nofail(b->fd);
109 p = strappend("/dev/input/", b->name);
113 b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
116 log_warning("Failed to open %s: %m", b->name);
120 if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
121 log_error("Failed to get input name: %m");
128 ev.data.u32 = FD_OTHER_BASE + b->fd;
130 if (epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_ADD, b->fd, &ev) < 0) {
131 log_error("Failed to add to epoll: %m");
136 r = hashmap_put(b->manager->button_fds, INT_TO_PTR(b->fd + 1), b);
138 log_error("Failed to add to hash map: %s", strerror(-r));
139 assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0);
143 log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
148 close_nointr_nofail(b->fd);
153 static int button_handle(
155 InhibitWhat inhibit_key,
157 bool ignore_inhibited,
160 static const char * const message_table[_HANDLE_BUTTON_MAX] = {
161 [HANDLE_POWEROFF] = "Powering Off...",
162 [HANDLE_REBOOT] = "Rebooting...",
163 [HANDLE_HALT] = "Halting...",
164 [HANDLE_KEXEC] = "Rebooting via kexec...",
165 [HANDLE_SUSPEND] = "Suspending...",
166 [HANDLE_HIBERNATE] = "Hibernating..."
169 static const char * const target_table[_HANDLE_BUTTON_MAX] = {
170 [HANDLE_POWEROFF] = "poweroff.target",
171 [HANDLE_REBOOT] = "reboot.target",
172 [HANDLE_HALT] = "halt.target",
173 [HANDLE_KEXEC] = "kexec.target",
174 [HANDLE_SUSPEND] = "suspend.target",
175 [HANDLE_HIBERNATE] = "hibernate.target"
180 InhibitWhat inhibit_operation;
184 /* If the key handling is turned off, don't do anything */
185 if (handle == HANDLE_IGNORE) {
186 log_debug("Refusing key handling, as it is turned off.");
190 /* If the key handling is inhibited, don't do anything */
191 if (manager_is_inhibited(b->manager, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0)) {
192 log_debug("Refusing key handling, %s is inhibited.", inhibit_what_to_string(inhibit_key));
196 inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
198 /* If the actual operation is inhibited, warn and fail */
199 if (!ignore_inhibited &&
200 manager_is_inhibited(b->manager, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0)) {
203 /* If this is just a recheck of the lid switch then don't warn about anything */
205 log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
209 log_error("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_operation));
214 log_info("%s", message_table[handle]);
216 /* We are executing the operation, so make sure we don't
217 * execute another one until the lid is opened/closed again */
218 b->lid_close_queued = false;
220 dbus_error_init(&error);
221 r = bus_manager_shutdown_or_sleep_now_or_later(b->manager, target_table[handle], inhibit_operation, &error);
223 log_error("Failed to execute operation: %s", bus_error_message(&error));
224 dbus_error_free(&error);
231 int button_process(Button *b) {
232 struct input_event ev;
237 l = read(b->fd, &ev, sizeof(ev));
239 return errno != EAGAIN ? -errno : 0;
240 if ((size_t) l < sizeof(ev))
243 if (ev.type == EV_KEY && ev.value > 0) {
249 log_info("Power key pressed.");
250 return button_handle(b, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
252 /* The kernel is a bit confused here:
254 KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
255 KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
259 log_info("Suspend key pressed.");
260 return button_handle(b, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
263 log_info("Hibernate key pressed.");
264 return button_handle(b, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
267 } else if (ev.type == EV_SW && ev.value > 0) {
272 log_info("Lid closed.");
273 b->lid_close_queued = true;
275 return button_handle(b, INHIBIT_HANDLE_LID_SWITCH, b->manager->handle_lid_switch, b->manager->lid_switch_ignore_inhibited, true);
278 } else if (ev.type == EV_SW && ev.value == 0) {
283 log_info("Lid opened.");
284 b->lid_close_queued = false;
292 int button_recheck(Button *b) {
295 if (!b->lid_close_queued)
298 return button_handle(b, INHIBIT_HANDLE_LID_SWITCH, b->manager->handle_lid_switch, b->manager->lid_switch_ignore_inhibited, false);
301 static const char* const handle_button_table[_HANDLE_BUTTON_MAX] = {
302 [HANDLE_IGNORE] = "ignore",
303 [HANDLE_POWEROFF] = "poweroff",
304 [HANDLE_REBOOT] = "reboot",
305 [HANDLE_HALT] = "halt",
306 [HANDLE_KEXEC] = "kexec",
307 [HANDLE_SUSPEND] = "suspend",
308 [HANDLE_HIBERNATE] = "hibernate"
310 DEFINE_STRING_TABLE_LOOKUP(handle_button, HandleButton);
311 DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_button, handle_button, HandleButton, "Failed to parse handle button setting");