2 This file is part of systemd.
4 Copyright 2012 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/ioctl.h>
25 #include <linux/input.h>
27 #include "sd-messages.h"
29 #include "alloc-util.h"
31 #include "logind-button.h"
32 #include "string-util.h"
35 Button* button_new(Manager *m, const char *name) {
45 b->name = strdup(name);
51 if (hashmap_put(m->buttons, b->name, b) < 0) {
63 void button_free(Button *b) {
66 hashmap_remove(b->manager->buttons, b->name);
68 sd_event_source_unref(b->io_event_source);
69 sd_event_source_unref(b->check_event_source);
72 /* If the device has been unplugged close() returns
73 * ENODEV, let's ignore this, hence we don't use
82 int button_set_seat(Button *b, const char *sn) {
98 static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
99 HandleAction handle_action;
103 /* If we are docked, handle the lid switch differently */
104 if (manager_is_docked_or_external_displays(manager))
105 handle_action = manager->handle_lid_switch_docked;
107 handle_action = manager->handle_lid_switch;
109 manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
112 static int button_recheck(sd_event_source *e, void *userdata) {
113 Button *b = userdata;
116 assert(b->lid_closed);
118 button_lid_switch_handle_action(b->manager, false);
122 static int button_install_check_event_source(Button *b) {
126 /* Install a post handler, so that we keep rechecking as long as the lid is closed. */
128 if (b->check_event_source)
131 r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
135 return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
138 static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
139 Button *b = userdata;
140 struct input_event ev;
147 l = read(b->fd, &ev, sizeof(ev));
149 return errno != EAGAIN ? -errno : 0;
150 if ((size_t) l < sizeof(ev))
153 if (ev.type == EV_KEY && ev.value > 0) {
160 LOG_MESSAGE("Power key pressed."),
161 LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY),
164 manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
167 /* The kernel is a bit confused here:
169 KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
170 KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
175 LOG_MESSAGE("Suspend key pressed."),
176 LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY),
179 manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
184 LOG_MESSAGE("Hibernate key pressed."),
185 LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY),
188 manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
192 } else if (ev.type == EV_SW && ev.value > 0) {
194 if (ev.code == SW_LID) {
196 LOG_MESSAGE("Lid closed."),
197 LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED),
200 b->lid_closed = true;
201 button_lid_switch_handle_action(b->manager, true);
202 button_install_check_event_source(b);
204 } else if (ev.code == SW_DOCK) {
206 LOG_MESSAGE("System docked."),
207 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
213 } else if (ev.type == EV_SW && ev.value == 0) {
215 if (ev.code == SW_LID) {
217 LOG_MESSAGE("Lid opened."),
218 LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED),
221 b->lid_closed = false;
222 b->check_event_source = sd_event_source_unref(b->check_event_source);
224 } else if (ev.code == SW_DOCK) {
226 LOG_MESSAGE("System undocked."),
227 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
237 int button_open(Button *b) {
243 b->fd = safe_close(b->fd);
245 p = strjoina("/dev/input/", b->name);
247 b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
249 return log_warning_errno(errno, "Failed to open %s: %m", b->name);
251 if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
252 r = log_error_errno(errno, "Failed to get input name: %m");
256 r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
258 log_error_errno(r, "Failed to add button event: %m");
262 log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
267 b->fd = safe_close(b->fd);
271 int button_check_switches(Button *b) {
272 uint8_t switches[SW_MAX/8+1] = {};
278 if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
281 b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
282 b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
285 button_install_check_event_source(b);