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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e9d21f24 | 2 | |
e9d21f24 LP |
3 | #include <errno.h> |
4 | #include <fcntl.h> | |
07630cea | 5 | #include <string.h> |
e9d21f24 LP |
6 | #include <sys/ioctl.h> |
7 | #include <unistd.h> | |
8 | #include <linux/input.h> | |
e9d21f24 | 9 | |
cc377381 | 10 | #include "sd-messages.h" |
07630cea | 11 | |
b5efdb8a | 12 | #include "alloc-util.h" |
3ffd4af2 LP |
13 | #include "fd-util.h" |
14 | #include "logind-button.h" | |
07630cea | 15 | #include "string-util.h" |
e9d21f24 | 16 | #include "util.h" |
e9d21f24 | 17 | |
d5dd44b0 LP |
18 | #define CONST_MAX4(a, b, c, d) CONST_MAX(CONST_MAX(a, b), CONST_MAX(c, d)) |
19 | ||
20 | #define ULONG_BITS (sizeof(unsigned long)*8) | |
21 | ||
22 | static bool bitset_get(const unsigned long *bits, unsigned i) { | |
23 | return (bits[i / ULONG_BITS] >> (i % ULONG_BITS)) & 1UL; | |
24 | } | |
25 | ||
26 | static void bitset_put(unsigned long *bits, unsigned i) { | |
27 | bits[i / ULONG_BITS] |= (unsigned long) 1 << (i % ULONG_BITS); | |
28 | } | |
29 | ||
e9d21f24 LP |
30 | Button* button_new(Manager *m, const char *name) { |
31 | Button *b; | |
32 | ||
33 | assert(m); | |
34 | assert(name); | |
35 | ||
36 | b = new0(Button, 1); | |
37 | if (!b) | |
38 | return NULL; | |
39 | ||
40 | b->name = strdup(name); | |
6b430fdb ZJS |
41 | if (!b->name) |
42 | return mfree(b); | |
e9d21f24 LP |
43 | |
44 | if (hashmap_put(m->buttons, b->name, b) < 0) { | |
45 | free(b->name); | |
6b430fdb | 46 | return mfree(b); |
e9d21f24 LP |
47 | } |
48 | ||
49 | b->manager = m; | |
50 | b->fd = -1; | |
51 | ||
52 | return b; | |
53 | } | |
54 | ||
55 | void button_free(Button *b) { | |
56 | assert(b); | |
57 | ||
58 | hashmap_remove(b->manager->buttons, b->name); | |
59 | ||
ed4ba7e4 LP |
60 | sd_event_source_unref(b->io_event_source); |
61 | sd_event_source_unref(b->check_event_source); | |
c30a0c62 | 62 | |
ece174c5 | 63 | if (b->fd >= 0) |
c30a0c62 LP |
64 | /* If the device has been unplugged close() returns |
65 | * ENODEV, let's ignore this, hence we don't use | |
03e334a1 | 66 | * safe_close() */ |
4fba5796 | 67 | (void) close(b->fd); |
e9d21f24 LP |
68 | |
69 | free(b->name); | |
70 | free(b->seat); | |
71 | free(b); | |
72 | } | |
73 | ||
74 | int button_set_seat(Button *b, const char *sn) { | |
75 | char *s; | |
76 | ||
77 | assert(b); | |
78 | assert(sn); | |
79 | ||
80 | s = strdup(sn); | |
81 | if (!s) | |
82 | return -ENOMEM; | |
83 | ||
84 | free(b->seat); | |
85 | b->seat = s; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
3c56cab4 BW |
90 | static void button_lid_switch_handle_action(Manager *manager, bool is_edge) { |
91 | HandleAction handle_action; | |
92 | ||
93 | assert(manager); | |
94 | ||
e25937a3 SF |
95 | /* If we are docked or on external power, handle the lid switch |
96 | * differently */ | |
602a41c2 | 97 | if (manager_is_docked_or_external_displays(manager)) |
3c56cab4 | 98 | handle_action = manager->handle_lid_switch_docked; |
e25937a3 SF |
99 | else if (manager->handle_lid_switch_ep != _HANDLE_ACTION_INVALID && |
100 | manager_is_on_external_power()) | |
101 | handle_action = manager->handle_lid_switch_ep; | |
3c56cab4 BW |
102 | else |
103 | handle_action = manager->handle_lid_switch; | |
104 | ||
105 | manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge); | |
106 | } | |
107 | ||
ed4ba7e4 LP |
108 | static int button_recheck(sd_event_source *e, void *userdata) { |
109 | Button *b = userdata; | |
beaafb2e | 110 | |
ed4ba7e4 LP |
111 | assert(b); |
112 | assert(b->lid_closed); | |
113 | ||
3c56cab4 | 114 | button_lid_switch_handle_action(b->manager, false); |
ed4ba7e4 LP |
115 | return 1; |
116 | } | |
e9d21f24 | 117 | |
ed4ba7e4 LP |
118 | static int button_install_check_event_source(Button *b) { |
119 | int r; | |
e9d21f24 LP |
120 | assert(b); |
121 | ||
ed4ba7e4 | 122 | /* Install a post handler, so that we keep rechecking as long as the lid is closed. */ |
6de0e0e5 | 123 | |
ed4ba7e4 LP |
124 | if (b->check_event_source) |
125 | return 0; | |
126 | ||
127 | r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
131 | return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1); | |
e9d21f24 LP |
132 | } |
133 | ||
cc377381 LP |
134 | static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
135 | Button *b = userdata; | |
e9d21f24 LP |
136 | struct input_event ev; |
137 | ssize_t l; | |
138 | ||
cc377381 LP |
139 | assert(s); |
140 | assert(fd == b->fd); | |
e9d21f24 LP |
141 | assert(b); |
142 | ||
143 | l = read(b->fd, &ev, sizeof(ev)); | |
144 | if (l < 0) | |
145 | return errno != EAGAIN ? -errno : 0; | |
146 | if ((size_t) l < sizeof(ev)) | |
147 | return -EIO; | |
148 | ||
e9d21f24 LP |
149 | if (ev.type == EV_KEY && ev.value > 0) { |
150 | ||
151 | switch (ev.code) { | |
152 | ||
153 | case KEY_POWER: | |
154 | case KEY_POWER2: | |
c485437f | 155 | log_struct(LOG_INFO, |
e2cc6eca | 156 | LOG_MESSAGE("Power key pressed."), |
a1230ff9 | 157 | "MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR); |
7b77ed8c | 158 | |
ed4ba7e4 | 159 | manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true); |
7b77ed8c | 160 | break; |
e9d21f24 | 161 | |
8e7fd6ad LP |
162 | /* The kernel is a bit confused here: |
163 | ||
164 | KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend" | |
165 | KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate" | |
166 | */ | |
167 | ||
e9d21f24 | 168 | case KEY_SLEEP: |
c485437f | 169 | log_struct(LOG_INFO, |
e2cc6eca | 170 | LOG_MESSAGE("Suspend key pressed."), |
a1230ff9 | 171 | "MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR); |
7b77ed8c | 172 | |
ed4ba7e4 | 173 | manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true); |
7b77ed8c | 174 | break; |
e9d21f24 | 175 | |
8e7fd6ad | 176 | case KEY_SUSPEND: |
c485437f | 177 | log_struct(LOG_INFO, |
e2cc6eca | 178 | LOG_MESSAGE("Hibernate key pressed."), |
a1230ff9 | 179 | "MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR); |
7b77ed8c | 180 | |
ed4ba7e4 | 181 | manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true); |
7b77ed8c | 182 | break; |
e9d21f24 | 183 | } |
8e7fd6ad | 184 | |
e9d21f24 LP |
185 | } else if (ev.type == EV_SW && ev.value > 0) { |
186 | ||
7b77ed8c | 187 | if (ev.code == SW_LID) { |
c485437f | 188 | log_struct(LOG_INFO, |
e2cc6eca | 189 | LOG_MESSAGE("Lid closed."), |
a1230ff9 | 190 | "MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR); |
65b51162 | 191 | |
ed4ba7e4 | 192 | b->lid_closed = true; |
3c56cab4 | 193 | button_lid_switch_handle_action(b->manager, true); |
ed4ba7e4 | 194 | button_install_check_event_source(b); |
2d62c530 LP |
195 | |
196 | } else if (ev.code == SW_DOCK) { | |
197 | log_struct(LOG_INFO, | |
e2cc6eca | 198 | LOG_MESSAGE("System docked."), |
a1230ff9 | 199 | "MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR); |
2d62c530 LP |
200 | |
201 | b->docked = true; | |
65b51162 LP |
202 | } |
203 | ||
204 | } else if (ev.type == EV_SW && ev.value == 0) { | |
205 | ||
7b77ed8c | 206 | if (ev.code == SW_LID) { |
c485437f | 207 | log_struct(LOG_INFO, |
e2cc6eca | 208 | LOG_MESSAGE("Lid opened."), |
a1230ff9 | 209 | "MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR); |
7b77ed8c | 210 | |
ed4ba7e4 LP |
211 | b->lid_closed = false; |
212 | b->check_event_source = sd_event_source_unref(b->check_event_source); | |
2d62c530 LP |
213 | |
214 | } else if (ev.code == SW_DOCK) { | |
215 | log_struct(LOG_INFO, | |
e2cc6eca | 216 | LOG_MESSAGE("System undocked."), |
a1230ff9 | 217 | "MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR); |
2d62c530 LP |
218 | |
219 | b->docked = false; | |
e9d21f24 LP |
220 | } |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
2546b70a LP |
226 | static int button_suitable(Button *b) { |
227 | unsigned long types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1]; | |
228 | ||
229 | assert(b); | |
230 | assert(b->fd); | |
231 | ||
232 | if (ioctl(b->fd, EVIOCGBIT(EV_SYN, sizeof(types)), types) < 0) | |
233 | return -errno; | |
234 | ||
235 | if (bitset_get(types, EV_KEY)) { | |
236 | unsigned long keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1]; | |
237 | ||
238 | if (ioctl(b->fd, EVIOCGBIT(EV_KEY, sizeof(keys)), keys) < 0) | |
239 | return -errno; | |
240 | ||
241 | if (bitset_get(keys, KEY_POWER) || | |
242 | bitset_get(keys, KEY_POWER2) || | |
243 | bitset_get(keys, KEY_SLEEP) || | |
244 | bitset_get(keys, KEY_SUSPEND)) | |
245 | return true; | |
246 | } | |
247 | ||
248 | if (bitset_get(types, EV_SW)) { | |
249 | unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1]; | |
250 | ||
251 | if (ioctl(b->fd, EVIOCGBIT(EV_SW, sizeof(switches)), switches) < 0) | |
252 | return -errno; | |
253 | ||
254 | if (bitset_get(switches, SW_LID) || | |
255 | bitset_get(switches, SW_DOCK)) | |
256 | return true; | |
257 | } | |
258 | ||
259 | return false; | |
260 | } | |
261 | ||
d5dd44b0 LP |
262 | static int button_set_mask(Button *b) { |
263 | unsigned long | |
264 | types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1] = {}, | |
265 | keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1] = {}, | |
266 | switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {}; | |
267 | struct input_mask mask; | |
268 | ||
269 | assert(b); | |
270 | assert(b->fd >= 0); | |
271 | ||
272 | bitset_put(types, EV_KEY); | |
273 | bitset_put(types, EV_SW); | |
274 | ||
275 | mask = (struct input_mask) { | |
276 | .type = EV_SYN, | |
277 | .codes_size = sizeof(types), | |
278 | .codes_ptr = PTR_TO_UINT64(types), | |
279 | }; | |
280 | ||
281 | if (ioctl(b->fd, EVIOCSMASK, &mask) < 0) | |
282 | /* Log only at debug level if the kernel doesn't do EVIOCSMASK yet */ | |
283 | return log_full_errno(IN_SET(errno, ENOTTY, EOPNOTSUPP, EINVAL) ? LOG_DEBUG : LOG_WARNING, | |
284 | errno, "Failed to set EV_SYN event mask on /dev/input/%s: %m", b->name); | |
285 | ||
286 | bitset_put(keys, KEY_POWER); | |
287 | bitset_put(keys, KEY_POWER2); | |
288 | bitset_put(keys, KEY_SLEEP); | |
289 | bitset_put(keys, KEY_SUSPEND); | |
290 | ||
291 | mask = (struct input_mask) { | |
292 | .type = EV_KEY, | |
293 | .codes_size = sizeof(keys), | |
294 | .codes_ptr = PTR_TO_UINT64(keys), | |
295 | }; | |
296 | ||
297 | if (ioctl(b->fd, EVIOCSMASK, &mask) < 0) | |
298 | return log_warning_errno(errno, "Failed to set EV_KEY event mask on /dev/input/%s: %m", b->name); | |
299 | ||
300 | bitset_put(switches, SW_LID); | |
301 | bitset_put(switches, SW_DOCK); | |
302 | ||
303 | mask = (struct input_mask) { | |
304 | .type = EV_SW, | |
305 | .codes_size = sizeof(switches), | |
306 | .codes_ptr = PTR_TO_UINT64(switches), | |
307 | }; | |
308 | ||
309 | if (ioctl(b->fd, EVIOCSMASK, &mask) < 0) | |
310 | return log_warning_errno(errno, "Failed to set EV_SW event mask on /dev/input/%s: %m", b->name); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
cc377381 LP |
315 | int button_open(Button *b) { |
316 | char *p, name[256]; | |
317 | int r; | |
318 | ||
319 | assert(b); | |
320 | ||
7f6e12b0 | 321 | b->fd = safe_close(b->fd); |
cc377381 | 322 | |
63c372cb | 323 | p = strjoina("/dev/input/", b->name); |
cc377381 LP |
324 | |
325 | b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); | |
4a62c710 | 326 | if (b->fd < 0) |
2546b70a LP |
327 | return log_warning_errno(errno, "Failed to open %s: %m", p); |
328 | ||
329 | r = button_suitable(b); | |
330 | if (r < 0) | |
331 | return log_warning_errno(r, "Failed to determine whether input device is relevant to us: %m"); | |
332 | if (r == 0) { | |
333 | log_debug("Device %s does not expose keys or switches relevant to us, ignoring.", p); | |
334 | return -EADDRNOTAVAIL; | |
335 | } | |
cc377381 LP |
336 | |
337 | if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) { | |
76ef789d | 338 | r = log_error_errno(errno, "Failed to get input name: %m"); |
cc377381 LP |
339 | goto fail; |
340 | } | |
341 | ||
d5dd44b0 LP |
342 | (void) button_set_mask(b); |
343 | ||
ed4ba7e4 | 344 | r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b); |
cc377381 | 345 | if (r < 0) { |
da927ba9 | 346 | log_error_errno(r, "Failed to add button event: %m"); |
cc377381 LP |
347 | goto fail; |
348 | } | |
349 | ||
350 | log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name); | |
351 | ||
352 | return 0; | |
353 | ||
354 | fail: | |
66e40583 | 355 | b->fd = safe_close(b->fd); |
cc377381 LP |
356 | return r; |
357 | } | |
358 | ||
2d62c530 | 359 | int button_check_switches(Button *b) { |
d5dd44b0 | 360 | unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {}; |
65b51162 LP |
361 | assert(b); |
362 | ||
ed4ba7e4 LP |
363 | if (b->fd < 0) |
364 | return -EINVAL; | |
365 | ||
366 | if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0) | |
367 | return -errno; | |
65b51162 | 368 | |
d5dd44b0 LP |
369 | b->lid_closed = bitset_get(switches, SW_LID); |
370 | b->docked = bitset_get(switches, SW_DOCK); | |
ed4ba7e4 | 371 | |
2d62c530 | 372 | if (b->lid_closed) |
ed4ba7e4 | 373 | button_install_check_event_source(b); |
ed4ba7e4 LP |
374 | |
375 | return 0; | |
65b51162 | 376 | } |