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/>.
25 #include <sys/ioctl.h>
27 #include <linux/input.h>
29 #include "sd-messages.h"
31 #include "logind-button.h"
33 Button
* button_new(Manager
*m
, const char *name
) {
43 b
->name
= strdup(name
);
49 if (hashmap_put(m
->buttons
, b
->name
, b
) < 0) {
61 void button_free(Button
*b
) {
64 hashmap_remove(b
->manager
->buttons
, b
->name
);
66 sd_event_source_unref(b
->io_event_source
);
67 sd_event_source_unref(b
->check_event_source
);
70 /* If the device has been unplugged close() returns
71 * ENODEV, let's ignore this, hence we don't use
80 int button_set_seat(Button
*b
, const char *sn
) {
96 static void button_lid_switch_handle_action(Manager
*manager
, bool is_edge
) {
97 HandleAction handle_action
;
101 /* If we are docked, handle the lid switch differently */
102 if (manager_is_docked_or_external_displays(manager
))
103 handle_action
= manager
->handle_lid_switch_docked
;
105 handle_action
= manager
->handle_lid_switch
;
107 manager_handle_action(manager
, INHIBIT_HANDLE_LID_SWITCH
, handle_action
, manager
->lid_switch_ignore_inhibited
, is_edge
);
110 static int button_recheck(sd_event_source
*e
, void *userdata
) {
111 Button
*b
= userdata
;
114 assert(b
->lid_closed
);
116 button_lid_switch_handle_action(b
->manager
, false);
120 static int button_install_check_event_source(Button
*b
) {
124 /* Install a post handler, so that we keep rechecking as long as the lid is closed. */
126 if (b
->check_event_source
)
129 r
= sd_event_add_post(b
->manager
->event
, &b
->check_event_source
, button_recheck
, b
);
133 return sd_event_source_set_priority(b
->check_event_source
, SD_EVENT_PRIORITY_IDLE
+1);
136 static int button_dispatch(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
137 Button
*b
= userdata
;
138 struct input_event ev
;
145 l
= read(b
->fd
, &ev
, sizeof(ev
));
147 return errno
!= EAGAIN
? -errno
: 0;
148 if ((size_t) l
< sizeof(ev
))
151 if (ev
.type
== EV_KEY
&& ev
.value
> 0) {
158 LOG_MESSAGE("Power key pressed."),
159 LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY
),
162 manager_handle_action(b
->manager
, INHIBIT_HANDLE_POWER_KEY
, b
->manager
->handle_power_key
, b
->manager
->power_key_ignore_inhibited
, true);
165 /* The kernel is a bit confused here:
167 KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
168 KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
173 LOG_MESSAGE("Suspend key pressed."),
174 LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY
),
177 manager_handle_action(b
->manager
, INHIBIT_HANDLE_SUSPEND_KEY
, b
->manager
->handle_suspend_key
, b
->manager
->suspend_key_ignore_inhibited
, true);
182 LOG_MESSAGE("Hibernate key pressed."),
183 LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY
),
186 manager_handle_action(b
->manager
, INHIBIT_HANDLE_HIBERNATE_KEY
, b
->manager
->handle_hibernate_key
, b
->manager
->hibernate_key_ignore_inhibited
, true);
190 } else if (ev
.type
== EV_SW
&& ev
.value
> 0) {
192 if (ev
.code
== SW_LID
) {
194 LOG_MESSAGE("Lid closed."),
195 LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED
),
198 b
->lid_closed
= true;
199 button_lid_switch_handle_action(b
->manager
, true);
200 button_install_check_event_source(b
);
202 } else if (ev
.code
== SW_DOCK
) {
204 LOG_MESSAGE("System docked."),
205 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED
),
211 } else if (ev
.type
== EV_SW
&& ev
.value
== 0) {
213 if (ev
.code
== SW_LID
) {
215 LOG_MESSAGE("Lid opened."),
216 LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED
),
219 b
->lid_closed
= false;
220 b
->check_event_source
= sd_event_source_unref(b
->check_event_source
);
222 } else if (ev
.code
== SW_DOCK
) {
224 LOG_MESSAGE("System undocked."),
225 LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED
),
235 int button_open(Button
*b
) {
241 b
->fd
= safe_close(b
->fd
);
243 p
= strjoina("/dev/input/", b
->name
);
245 b
->fd
= open(p
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
);
247 return log_warning_errno(errno
, "Failed to open %s: %m", b
->name
);
249 if (ioctl(b
->fd
, EVIOCGNAME(sizeof(name
)), name
) < 0) {
250 r
= log_error_errno(errno
, "Failed to get input name: %m");
254 r
= sd_event_add_io(b
->manager
->event
, &b
->io_event_source
, b
->fd
, EPOLLIN
, button_dispatch
, b
);
256 log_error_errno(r
, "Failed to add button event: %m");
260 log_info("Watching system buttons on /dev/input/%s (%s)", b
->name
, name
);
265 b
->fd
= safe_close(b
->fd
);
269 int button_check_switches(Button
*b
) {
270 uint8_t switches
[SW_MAX
/8+1] = {};
276 if (ioctl(b
->fd
, EVIOCGSW(sizeof(switches
)), switches
) < 0)
279 b
->lid_closed
= (switches
[SW_LID
/8] >> (SW_LID
% 8)) & 1;
280 b
->docked
= (switches
[SW_DOCK
/8] >> (SW_DOCK
% 8)) & 1;
283 button_install_check_event_source(b
);