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);
49 if (hashmap_put(m->buttons, b->name, b) < 0) {
60 void button_free(Button *b) {
63 hashmap_remove(b->manager->buttons, b->name);
65 sd_event_source_unref(b->io_event_source);
66 sd_event_source_unref(b->check_event_source);
69 /* If the device has been unplugged close() returns
70 * ENODEV, let's ignore this, hence we don't use
79 int button_set_seat(Button *b, const char *sn) {
95 static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
96 HandleAction handle_action;
100 /* If we are docked, handle the lid switch differently */
101 if (manager_is_docked_or_external_displays(manager))
102 handle_action = manager->handle_lid_switch_docked;
104 handle_action = manager->handle_lid_switch;
106 manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
109 static int button_recheck(sd_event_source *e, void *userdata) {
110 Button *b = userdata;
113 assert(b->lid_closed);
115 button_lid_switch_handle_action(b->manager, false);
119 static int button_install_check_event_source(Button *b) {
123 /* Install a post handler, so that we keep rechecking as long as the lid is closed. */
125 if (b->check_event_source)
128 r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
132 return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
135 static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
136 Button *b = userdata;
137 struct input_event ev;
144 l = read(b->fd, &ev, sizeof(ev));
146 return errno != EAGAIN ? -errno : 0;
147 if ((size_t) l < sizeof(ev))
150 if (ev.type == EV_KEY && ev.value > 0) {
157 LOG_MESSAGE("Power key pressed."),
158 "MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR,
161 manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
164 /* The kernel is a bit confused here:
166 KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
167 KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
172 LOG_MESSAGE("Suspend key pressed."),
173 "MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR,
176 manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
181 LOG_MESSAGE("Hibernate key pressed."),
182 "MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR,
185 manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
189 } else if (ev.type == EV_SW && ev.value > 0) {
191 if (ev.code == SW_LID) {
193 LOG_MESSAGE("Lid closed."),
194 "MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR,
197 b->lid_closed = true;
198 button_lid_switch_handle_action(b->manager, true);
199 button_install_check_event_source(b);
201 } else if (ev.code == SW_DOCK) {
203 LOG_MESSAGE("System docked."),
204 "MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR,
210 } else if (ev.type == EV_SW && ev.value == 0) {
212 if (ev.code == SW_LID) {
214 LOG_MESSAGE("Lid opened."),
215 "MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR,
218 b->lid_closed = false;
219 b->check_event_source = sd_event_source_unref(b->check_event_source);
221 } else if (ev.code == SW_DOCK) {
223 LOG_MESSAGE("System undocked."),
224 "MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR,
234 int button_open(Button *b) {
240 b->fd = safe_close(b->fd);
242 p = strjoina("/dev/input/", b->name);
244 b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
246 return log_warning_errno(errno, "Failed to open %s: %m", b->name);
248 if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
249 r = log_error_errno(errno, "Failed to get input name: %m");
253 r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
255 log_error_errno(r, "Failed to add button event: %m");
259 log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
264 b->fd = safe_close(b->fd);
268 int button_check_switches(Button *b) {
269 uint8_t switches[SW_MAX/8+1] = {};
275 if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
278 b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
279 b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
282 button_install_check_event_source(b);