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e9d21f24 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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/>. | |
20 | ***/ | |
21 | ||
e9d21f24 LP |
22 | #include <string.h> |
23 | #include <errno.h> | |
24 | #include <fcntl.h> | |
25 | #include <sys/ioctl.h> | |
26 | #include <unistd.h> | |
27 | #include <linux/input.h> | |
e9d21f24 | 28 | |
cc377381 | 29 | #include "sd-messages.h" |
e9d21f24 | 30 | #include "util.h" |
cc377381 | 31 | #include "logind-button.h" |
e9d21f24 LP |
32 | |
33 | Button* button_new(Manager *m, const char *name) { | |
34 | Button *b; | |
35 | ||
36 | assert(m); | |
37 | assert(name); | |
38 | ||
39 | b = new0(Button, 1); | |
40 | if (!b) | |
41 | return NULL; | |
42 | ||
43 | b->name = strdup(name); | |
44 | if (!b->name) { | |
45 | free(b); | |
46 | return NULL; | |
47 | } | |
48 | ||
49 | if (hashmap_put(m->buttons, b->name, b) < 0) { | |
50 | free(b->name); | |
51 | free(b); | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | b->manager = m; | |
56 | b->fd = -1; | |
57 | ||
58 | return b; | |
59 | } | |
60 | ||
61 | void button_free(Button *b) { | |
62 | assert(b); | |
63 | ||
64 | hashmap_remove(b->manager->buttons, b->name); | |
65 | ||
ed4ba7e4 LP |
66 | sd_event_source_unref(b->io_event_source); |
67 | sd_event_source_unref(b->check_event_source); | |
c30a0c62 | 68 | |
cc377381 | 69 | if (b->fd >= 0) { |
c30a0c62 LP |
70 | /* If the device has been unplugged close() returns |
71 | * ENODEV, let's ignore this, hence we don't use | |
03e334a1 | 72 | * safe_close() */ |
4fba5796 | 73 | (void) close(b->fd); |
e9d21f24 LP |
74 | } |
75 | ||
76 | free(b->name); | |
77 | free(b->seat); | |
78 | free(b); | |
79 | } | |
80 | ||
81 | int button_set_seat(Button *b, const char *sn) { | |
82 | char *s; | |
83 | ||
84 | assert(b); | |
85 | assert(sn); | |
86 | ||
87 | s = strdup(sn); | |
88 | if (!s) | |
89 | return -ENOMEM; | |
90 | ||
91 | free(b->seat); | |
92 | b->seat = s; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
3c56cab4 BW |
97 | static void button_lid_switch_handle_action(Manager *manager, bool is_edge) { |
98 | HandleAction handle_action; | |
99 | ||
100 | assert(manager); | |
101 | ||
102 | /* If we are docked, handle the lid switch differently */ | |
602a41c2 | 103 | if (manager_is_docked_or_external_displays(manager)) |
3c56cab4 BW |
104 | handle_action = manager->handle_lid_switch_docked; |
105 | else | |
106 | handle_action = manager->handle_lid_switch; | |
107 | ||
108 | manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge); | |
109 | } | |
110 | ||
ed4ba7e4 LP |
111 | static int button_recheck(sd_event_source *e, void *userdata) { |
112 | Button *b = userdata; | |
beaafb2e | 113 | |
ed4ba7e4 LP |
114 | assert(b); |
115 | assert(b->lid_closed); | |
116 | ||
3c56cab4 | 117 | button_lid_switch_handle_action(b->manager, false); |
ed4ba7e4 LP |
118 | return 1; |
119 | } | |
e9d21f24 | 120 | |
ed4ba7e4 LP |
121 | static int button_install_check_event_source(Button *b) { |
122 | int r; | |
e9d21f24 LP |
123 | assert(b); |
124 | ||
ed4ba7e4 | 125 | /* Install a post handler, so that we keep rechecking as long as the lid is closed. */ |
6de0e0e5 | 126 | |
ed4ba7e4 LP |
127 | if (b->check_event_source) |
128 | return 0; | |
129 | ||
130 | r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b); | |
131 | if (r < 0) | |
132 | return r; | |
133 | ||
134 | return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1); | |
e9d21f24 LP |
135 | } |
136 | ||
cc377381 LP |
137 | static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
138 | Button *b = userdata; | |
e9d21f24 LP |
139 | struct input_event ev; |
140 | ssize_t l; | |
141 | ||
cc377381 LP |
142 | assert(s); |
143 | assert(fd == b->fd); | |
e9d21f24 LP |
144 | assert(b); |
145 | ||
146 | l = read(b->fd, &ev, sizeof(ev)); | |
147 | if (l < 0) | |
148 | return errno != EAGAIN ? -errno : 0; | |
149 | if ((size_t) l < sizeof(ev)) | |
150 | return -EIO; | |
151 | ||
e9d21f24 LP |
152 | if (ev.type == EV_KEY && ev.value > 0) { |
153 | ||
154 | switch (ev.code) { | |
155 | ||
156 | case KEY_POWER: | |
157 | case KEY_POWER2: | |
c485437f | 158 | log_struct(LOG_INFO, |
e2cc6eca LP |
159 | LOG_MESSAGE("Power key pressed."), |
160 | LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY), | |
c485437f | 161 | NULL); |
7b77ed8c | 162 | |
ed4ba7e4 | 163 | manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true); |
7b77ed8c | 164 | break; |
e9d21f24 | 165 | |
8e7fd6ad LP |
166 | /* The kernel is a bit confused here: |
167 | ||
168 | KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend" | |
169 | KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate" | |
170 | */ | |
171 | ||
e9d21f24 | 172 | case KEY_SLEEP: |
c485437f | 173 | log_struct(LOG_INFO, |
e2cc6eca LP |
174 | LOG_MESSAGE("Suspend key pressed."), |
175 | LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY), | |
c485437f | 176 | NULL); |
7b77ed8c | 177 | |
ed4ba7e4 | 178 | manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true); |
7b77ed8c | 179 | break; |
e9d21f24 | 180 | |
8e7fd6ad | 181 | case KEY_SUSPEND: |
c485437f | 182 | log_struct(LOG_INFO, |
e2cc6eca LP |
183 | LOG_MESSAGE("Hibernate key pressed."), |
184 | LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY), | |
c485437f | 185 | NULL); |
7b77ed8c | 186 | |
ed4ba7e4 | 187 | manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true); |
7b77ed8c | 188 | break; |
e9d21f24 | 189 | } |
8e7fd6ad | 190 | |
e9d21f24 LP |
191 | } else if (ev.type == EV_SW && ev.value > 0) { |
192 | ||
7b77ed8c | 193 | if (ev.code == SW_LID) { |
c485437f | 194 | log_struct(LOG_INFO, |
e2cc6eca LP |
195 | LOG_MESSAGE("Lid closed."), |
196 | LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED), | |
c485437f | 197 | NULL); |
65b51162 | 198 | |
ed4ba7e4 | 199 | b->lid_closed = true; |
3c56cab4 | 200 | button_lid_switch_handle_action(b->manager, true); |
ed4ba7e4 | 201 | button_install_check_event_source(b); |
2d62c530 LP |
202 | |
203 | } else if (ev.code == SW_DOCK) { | |
204 | log_struct(LOG_INFO, | |
e2cc6eca LP |
205 | LOG_MESSAGE("System docked."), |
206 | LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED), | |
2d62c530 LP |
207 | NULL); |
208 | ||
209 | b->docked = true; | |
65b51162 LP |
210 | } |
211 | ||
212 | } else if (ev.type == EV_SW && ev.value == 0) { | |
213 | ||
7b77ed8c | 214 | if (ev.code == SW_LID) { |
c485437f | 215 | log_struct(LOG_INFO, |
e2cc6eca LP |
216 | LOG_MESSAGE("Lid opened."), |
217 | LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED), | |
c485437f | 218 | NULL); |
7b77ed8c | 219 | |
ed4ba7e4 LP |
220 | b->lid_closed = false; |
221 | b->check_event_source = sd_event_source_unref(b->check_event_source); | |
2d62c530 LP |
222 | |
223 | } else if (ev.code == SW_DOCK) { | |
224 | log_struct(LOG_INFO, | |
e2cc6eca LP |
225 | LOG_MESSAGE("System undocked."), |
226 | LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED), | |
2d62c530 LP |
227 | NULL); |
228 | ||
229 | b->docked = false; | |
e9d21f24 LP |
230 | } |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
cc377381 LP |
236 | int button_open(Button *b) { |
237 | char *p, name[256]; | |
238 | int r; | |
239 | ||
240 | assert(b); | |
241 | ||
242 | if (b->fd >= 0) { | |
66e40583 | 243 | b->fd = safe_close(b->fd); |
cc377381 LP |
244 | } |
245 | ||
63c372cb | 246 | p = strjoina("/dev/input/", b->name); |
cc377381 LP |
247 | |
248 | b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); | |
4a62c710 MS |
249 | if (b->fd < 0) |
250 | return log_warning_errno(errno, "Failed to open %s: %m", b->name); | |
cc377381 LP |
251 | |
252 | if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) { | |
56f64d95 | 253 | log_error_errno(errno, "Failed to get input name: %m"); |
cc377381 LP |
254 | r = -errno; |
255 | goto fail; | |
256 | } | |
257 | ||
ed4ba7e4 | 258 | r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b); |
cc377381 | 259 | if (r < 0) { |
da927ba9 | 260 | log_error_errno(r, "Failed to add button event: %m"); |
cc377381 LP |
261 | goto fail; |
262 | } | |
263 | ||
264 | log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name); | |
265 | ||
266 | return 0; | |
267 | ||
268 | fail: | |
66e40583 | 269 | b->fd = safe_close(b->fd); |
cc377381 LP |
270 | return r; |
271 | } | |
272 | ||
2d62c530 | 273 | int button_check_switches(Button *b) { |
ed4ba7e4 | 274 | uint8_t switches[SW_MAX/8+1] = {}; |
65b51162 LP |
275 | assert(b); |
276 | ||
ed4ba7e4 LP |
277 | if (b->fd < 0) |
278 | return -EINVAL; | |
279 | ||
280 | if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0) | |
281 | return -errno; | |
65b51162 | 282 | |
ed4ba7e4 | 283 | b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1; |
2d62c530 | 284 | b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1; |
ed4ba7e4 | 285 | |
2d62c530 | 286 | if (b->lid_closed) |
ed4ba7e4 | 287 | button_install_check_event_source(b); |
ed4ba7e4 LP |
288 | |
289 | return 0; | |
65b51162 | 290 | } |