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 "MESSAGE=Power key pressed.",
163 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 "MESSAGE=Suspend key pressed.",
178 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 "MESSAGE=Hibernate key pressed.",
187 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 "MESSAGE=Lid closed.",
199 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 "MESSAGE=System docked.",
209 MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
215 } else if (ev.type == EV_SW && ev.value == 0) {
217 if (ev.code == SW_LID) {
219 "MESSAGE=Lid opened.",
220 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 "MESSAGE=System undocked.",
229 MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
239 int button_open(Button *b) {
250 p = strappenda("/dev/input/", b->name);
252 b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
254 log_warning("Failed to open %s: %m", b->name);
258 if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
259 log_error("Failed to get input name: %m");
264 r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
266 log_error("Failed to add button event: %s", strerror(-r));
270 log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
280 int button_check_switches(Button *b) {
281 uint8_t switches[SW_MAX/8+1] = {};
287 if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
290 b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
291 b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
294 button_install_check_event_source(b);