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>
30 #include "sd-messages.h"
31 #include "conf-parser.h"
34 #include "logind-button.h"
36 Button* button_new(Manager *m, const char *name) {
46 b->name = strdup(name);
52 if (hashmap_put(m->buttons, b->name, b) < 0) {
64 void button_free(Button *b) {
67 hashmap_remove(b->manager->buttons, b->name);
69 sd_event_source_unref(b->io_event_source);
70 sd_event_source_unref(b->check_event_source);
73 /* If the device has been unplugged close() returns
74 * ENODEV, let's ignore this, hence we don't use
84 int button_set_seat(Button *b, const char *sn) {
100 static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
101 HandleAction handle_action;
105 /* If we are docked, handle the lid switch differently */
106 if (manager_is_docked_or_multiple_displays(manager))
107 handle_action = manager->handle_lid_switch_docked;
109 handle_action = manager->handle_lid_switch;
111 manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
114 static int button_recheck(sd_event_source *e, void *userdata) {
115 Button *b = userdata;
118 assert(b->lid_closed);
120 button_lid_switch_handle_action(b->manager, false);
124 static int button_install_check_event_source(Button *b) {
128 /* Install a post handler, so that we keep rechecking as long as the lid is closed. */
130 if (b->check_event_source)
133 r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
137 return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
140 static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
141 Button *b = userdata;
142 struct input_event ev;
149 l = read(b->fd, &ev, sizeof(ev));
151 return errno != EAGAIN ? -errno : 0;
152 if ((size_t) l < sizeof(ev))
155 if (ev.type == EV_KEY && ev.value > 0) {
162 LOG_MESSAGE("Power key pressed."),
163 LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY),
166 manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
169 /* The kernel is a bit confused here:
171 KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
172 KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
177 LOG_MESSAGE("Suspend key pressed."),
178 LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY),
181 manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
186 LOG_MESSAGE("Hibernate key pressed."),
187 LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY),
190 manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
194 } else if (ev.type == EV_SW && ev.value > 0) {
196 if (ev.code == SW_LID) {
198 LOG_MESSAGE("Lid closed."),
199 LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED),
202 b->lid_closed = true;
203 button_lid_switch_handle_action(b->manager, true);
204 button_install_check_event_source(b);
206 } else if (ev.code == SW_DOCK) {
208 LOG_MESSAGE("System docked."),
209 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
215 } else if (ev.type == EV_SW && ev.value == 0) {
217 if (ev.code == SW_LID) {
219 LOG_MESSAGE("Lid opened."),
220 LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED),
223 b->lid_closed = false;
224 b->check_event_source = sd_event_source_unref(b->check_event_source);
226 } else if (ev.code == SW_DOCK) {
228 LOG_MESSAGE("System undocked."),
229 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
239 int button_open(Button *b) {
250 p = strjoina("/dev/input/", b->name);
252 b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
254 return log_warning_errno(errno, "Failed to open %s: %m", b->name);
256 if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
257 log_error_errno(errno, "Failed to get input name: %m");
262 r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
264 log_error_errno(r, "Failed to add button event: %m");
268 log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
278 int button_check_switches(Button *b) {
279 uint8_t switches[SW_MAX/8+1] = {};
285 if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
288 b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
289 b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
292 button_install_check_event_source(b);