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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2b3ab29d ZJS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
2b3ab29d ZJS |
21 | #include <fcntl.h> |
22 | #include <pwd.h> | |
cf0fbc49 TA |
23 | #include <sys/ioctl.h> |
24 | #include <sys/types.h> | |
2b3ab29d ZJS |
25 | #include <linux/vt.h> |
26 | ||
b5efdb8a | 27 | #include "alloc-util.h" |
cc377381 | 28 | #include "bus-error.h" |
3ffd4af2 LP |
29 | #include "bus-util.h" |
30 | #include "cgroup-util.h" | |
31 | #include "fd-util.h" | |
cc377381 | 32 | #include "logind.h" |
c29b65f7 | 33 | #include "parse-util.h" |
3ffd4af2 | 34 | #include "strv.h" |
288a74cc | 35 | #include "terminal-util.h" |
3ffd4af2 | 36 | #include "udev-util.h" |
b1d4f8e1 | 37 | #include "user-util.h" |
2b3ab29d ZJS |
38 | |
39 | int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) { | |
40 | Device *d; | |
41 | ||
42 | assert(m); | |
43 | assert(sysfs); | |
44 | ||
45 | d = hashmap_get(m->devices, sysfs); | |
61376f96 | 46 | if (d) |
2b3ab29d ZJS |
47 | /* we support adding master-flags, but not removing them */ |
48 | d->master = d->master || master; | |
61376f96 ZJS |
49 | else { |
50 | d = device_new(m, sysfs, master); | |
51 | if (!d) | |
52 | return -ENOMEM; | |
2b3ab29d ZJS |
53 | } |
54 | ||
2b3ab29d ZJS |
55 | if (_device) |
56 | *_device = d; | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | int manager_add_seat(Manager *m, const char *id, Seat **_seat) { | |
62 | Seat *s; | |
63 | ||
64 | assert(m); | |
65 | assert(id); | |
66 | ||
67 | s = hashmap_get(m->seats, id); | |
61376f96 ZJS |
68 | if (!s) { |
69 | s = seat_new(m, id); | |
70 | if (!s) | |
71 | return -ENOMEM; | |
2b3ab29d ZJS |
72 | } |
73 | ||
2b3ab29d ZJS |
74 | if (_seat) |
75 | *_seat = s; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | int manager_add_session(Manager *m, const char *id, Session **_session) { | |
81 | Session *s; | |
82 | ||
83 | assert(m); | |
84 | assert(id); | |
85 | ||
86 | s = hashmap_get(m->sessions, id); | |
61376f96 ZJS |
87 | if (!s) { |
88 | s = session_new(m, id); | |
89 | if (!s) | |
90 | return -ENOMEM; | |
2b3ab29d ZJS |
91 | } |
92 | ||
2b3ab29d ZJS |
93 | if (_session) |
94 | *_session = s; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) { | |
100 | User *u; | |
157f5057 | 101 | int r; |
2b3ab29d ZJS |
102 | |
103 | assert(m); | |
104 | assert(name); | |
105 | ||
8cb4ab00 | 106 | u = hashmap_get(m->users, UID_TO_PTR(uid)); |
61376f96 | 107 | if (!u) { |
157f5057 DH |
108 | r = user_new(&u, m, uid, gid, name); |
109 | if (r < 0) | |
110 | return r; | |
2b3ab29d ZJS |
111 | } |
112 | ||
2b3ab29d ZJS |
113 | if (_user) |
114 | *_user = u; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | int manager_add_user_by_name(Manager *m, const char *name, User **_user) { | |
120 | uid_t uid; | |
121 | gid_t gid; | |
122 | int r; | |
123 | ||
124 | assert(m); | |
125 | assert(name); | |
126 | ||
127 | r = get_user_creds(&name, &uid, &gid, NULL, NULL); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
131 | return manager_add_user(m, uid, gid, name, _user); | |
132 | } | |
133 | ||
134 | int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) { | |
135 | struct passwd *p; | |
136 | ||
137 | assert(m); | |
138 | ||
139 | errno = 0; | |
140 | p = getpwuid(uid); | |
141 | if (!p) | |
f5e5c28f | 142 | return errno > 0 ? -errno : -ENOENT; |
2b3ab29d ZJS |
143 | |
144 | return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user); | |
145 | } | |
146 | ||
147 | int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) { | |
148 | Inhibitor *i; | |
149 | ||
150 | assert(m); | |
151 | assert(id); | |
152 | ||
153 | i = hashmap_get(m->inhibitors, id); | |
154 | if (i) { | |
155 | if (_inhibitor) | |
156 | *_inhibitor = i; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | i = inhibitor_new(m, id); | |
162 | if (!i) | |
163 | return -ENOMEM; | |
164 | ||
165 | if (_inhibitor) | |
166 | *_inhibitor = i; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | int manager_add_button(Manager *m, const char *name, Button **_button) { | |
172 | Button *b; | |
173 | ||
174 | assert(m); | |
175 | assert(name); | |
176 | ||
177 | b = hashmap_get(m->buttons, name); | |
61376f96 ZJS |
178 | if (!b) { |
179 | b = button_new(m, name); | |
180 | if (!b) | |
181 | return -ENOMEM; | |
2b3ab29d ZJS |
182 | } |
183 | ||
2b3ab29d ZJS |
184 | if (_button) |
185 | *_button = b; | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
2b3ab29d ZJS |
190 | int manager_process_seat_device(Manager *m, struct udev_device *d) { |
191 | Device *device; | |
192 | int r; | |
193 | ||
194 | assert(m); | |
195 | ||
196 | if (streq_ptr(udev_device_get_action(d), "remove")) { | |
197 | ||
198 | device = hashmap_get(m->devices, udev_device_get_syspath(d)); | |
199 | if (!device) | |
200 | return 0; | |
201 | ||
202 | seat_add_to_gc_queue(device->seat); | |
203 | device_free(device); | |
204 | ||
205 | } else { | |
206 | const char *sn; | |
207 | Seat *seat = NULL; | |
208 | bool master; | |
209 | ||
210 | sn = udev_device_get_property_value(d, "ID_SEAT"); | |
211 | if (isempty(sn)) | |
212 | sn = "seat0"; | |
213 | ||
214 | if (!seat_name_is_valid(sn)) { | |
215 | log_warning("Device with invalid seat name %s found, ignoring.", sn); | |
216 | return 0; | |
217 | } | |
218 | ||
6a79c586 | 219 | seat = hashmap_get(m->seats, sn); |
2b3ab29d | 220 | master = udev_device_has_tag(d, "master-of-seat"); |
6a79c586 LP |
221 | |
222 | /* Ignore non-master devices for unknown seats */ | |
223 | if (!master && !seat) | |
2b3ab29d ZJS |
224 | return 0; |
225 | ||
226 | r = manager_add_device(m, udev_device_get_syspath(d), master, &device); | |
227 | if (r < 0) | |
228 | return r; | |
229 | ||
230 | if (!seat) { | |
231 | r = manager_add_seat(m, sn, &seat); | |
232 | if (r < 0) { | |
233 | if (!device->seat) | |
234 | device_free(device); | |
235 | ||
236 | return r; | |
237 | } | |
238 | } | |
239 | ||
240 | device_attach(device, seat); | |
241 | seat_start(seat); | |
242 | } | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | int manager_process_button_device(Manager *m, struct udev_device *d) { | |
248 | Button *b; | |
249 | ||
250 | int r; | |
251 | ||
252 | assert(m); | |
253 | ||
254 | if (streq_ptr(udev_device_get_action(d), "remove")) { | |
255 | ||
256 | b = hashmap_get(m->buttons, udev_device_get_sysname(d)); | |
257 | if (!b) | |
258 | return 0; | |
259 | ||
260 | button_free(b); | |
261 | ||
262 | } else { | |
263 | const char *sn; | |
264 | ||
265 | r = manager_add_button(m, udev_device_get_sysname(d), &b); | |
266 | if (r < 0) | |
267 | return r; | |
268 | ||
269 | sn = udev_device_get_property_value(d, "ID_SEAT"); | |
270 | if (isempty(sn)) | |
271 | sn = "seat0"; | |
272 | ||
273 | button_set_seat(b, sn); | |
2546b70a LP |
274 | |
275 | r = button_open(b); | |
276 | if (r < 0) /* event device doesn't have any keys or switches relevant to us? (or any other error | |
277 | * opening the device?) let's close the button again. */ | |
278 | button_free(b); | |
2b3ab29d ZJS |
279 | } |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { | |
285 | _cleanup_free_ char *unit = NULL; | |
286 | Session *s; | |
287 | int r; | |
288 | ||
289 | assert(m); | |
2b3ab29d | 290 | |
6f876815 | 291 | if (!pid_is_valid(pid)) |
2b3ab29d ZJS |
292 | return -EINVAL; |
293 | ||
294 | r = cg_pid_get_unit(pid, &unit); | |
295 | if (r < 0) | |
d3e84ddb | 296 | return 0; |
2b3ab29d ZJS |
297 | |
298 | s = hashmap_get(m->session_units, unit); | |
299 | if (!s) | |
300 | return 0; | |
301 | ||
b80120c4 DH |
302 | if (session) |
303 | *session = s; | |
2b3ab29d ZJS |
304 | return 1; |
305 | } | |
306 | ||
307 | int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) { | |
308 | _cleanup_free_ char *unit = NULL; | |
309 | User *u; | |
310 | int r; | |
311 | ||
312 | assert(m); | |
313 | assert(user); | |
314 | ||
6f876815 | 315 | if (!pid_is_valid(pid)) |
2b3ab29d ZJS |
316 | return -EINVAL; |
317 | ||
318 | r = cg_pid_get_slice(pid, &unit); | |
319 | if (r < 0) | |
d3e84ddb | 320 | return 0; |
2b3ab29d ZJS |
321 | |
322 | u = hashmap_get(m->user_units, unit); | |
323 | if (!u) | |
324 | return 0; | |
325 | ||
326 | *user = u; | |
327 | return 1; | |
328 | } | |
329 | ||
330 | int manager_get_idle_hint(Manager *m, dual_timestamp *t) { | |
331 | Session *s; | |
332 | bool idle_hint; | |
5cb14b37 | 333 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
2b3ab29d ZJS |
334 | Iterator i; |
335 | ||
336 | assert(m); | |
337 | ||
85a428c6 | 338 | idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL); |
2b3ab29d ZJS |
339 | |
340 | HASHMAP_FOREACH(s, m->sessions, i) { | |
341 | dual_timestamp k; | |
342 | int ih; | |
343 | ||
344 | ih = session_get_idle_hint(s, &k); | |
345 | if (ih < 0) | |
346 | return ih; | |
347 | ||
348 | if (!ih) { | |
349 | if (!idle_hint) { | |
350 | if (k.monotonic < ts.monotonic) | |
351 | ts = k; | |
352 | } else { | |
353 | idle_hint = false; | |
354 | ts = k; | |
355 | } | |
356 | } else if (idle_hint) { | |
357 | ||
358 | if (k.monotonic > ts.monotonic) | |
359 | ts = k; | |
360 | } | |
361 | } | |
362 | ||
363 | if (t) | |
364 | *t = ts; | |
365 | ||
366 | return idle_hint; | |
367 | } | |
368 | ||
369 | bool manager_shall_kill(Manager *m, const char *user) { | |
370 | assert(m); | |
371 | assert(user); | |
372 | ||
a2ed7077 ZJS |
373 | if (!m->kill_exclude_users && streq(user, "root")) |
374 | return false; | |
375 | ||
2b3ab29d ZJS |
376 | if (strv_contains(m->kill_exclude_users, user)) |
377 | return false; | |
378 | ||
921f831d ZJS |
379 | if (!strv_isempty(m->kill_only_users)) |
380 | return strv_contains(m->kill_only_users, user); | |
2b3ab29d | 381 | |
921f831d | 382 | return m->kill_user_processes; |
2b3ab29d ZJS |
383 | } |
384 | ||
c29b65f7 AJ |
385 | int config_parse_n_autovts( |
386 | const char *unit, | |
387 | const char *filename, | |
388 | unsigned line, | |
389 | const char *section, | |
390 | unsigned section_line, | |
391 | const char *lvalue, | |
392 | int ltype, | |
393 | const char *rvalue, | |
394 | void *data, | |
395 | void *userdata) { | |
396 | ||
397 | unsigned *n = data; | |
398 | unsigned o; | |
399 | int r; | |
400 | ||
401 | assert(filename); | |
402 | assert(lvalue); | |
403 | assert(rvalue); | |
404 | assert(data); | |
405 | ||
406 | r = safe_atou(rvalue, &o); | |
407 | if (r < 0) { | |
408 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse number of autovts, ignoring: %s", rvalue); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | if (o > 15) { | |
413 | log_syntax(unit, LOG_ERR, filename, line, r, "A maximum of 15 autovts are supported, ignoring: %s", rvalue); | |
414 | return 0; | |
415 | } | |
416 | ||
417 | *n = o; | |
418 | return 0; | |
419 | } | |
420 | ||
92bd5ff3 | 421 | static int vt_is_busy(unsigned int vtnr) { |
2b3ab29d | 422 | struct vt_stat vt_stat; |
61376f96 ZJS |
423 | int r = 0; |
424 | _cleanup_close_ int fd; | |
2b3ab29d ZJS |
425 | |
426 | assert(vtnr >= 1); | |
427 | ||
c29b65f7 AJ |
428 | /* VT_GETSTATE "cannot return state for more than 16 VTs, since v_state is short" */ |
429 | assert(vtnr <= 15); | |
430 | ||
2b3ab29d ZJS |
431 | /* We explicitly open /dev/tty1 here instead of /dev/tty0. If |
432 | * we'd open the latter we'd open the foreground tty which | |
433 | * hence would be unconditionally busy. By opening /dev/tty1 | |
434 | * we avoid this. Since tty1 is special and needs to be an | |
435 | * explicitly loaded getty or DM this is safe. */ | |
436 | ||
437 | fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC); | |
438 | if (fd < 0) | |
439 | return -errno; | |
440 | ||
441 | if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0) | |
442 | r = -errno; | |
443 | else | |
444 | r = !!(vt_stat.v_state & (1 << vtnr)); | |
445 | ||
2b3ab29d ZJS |
446 | return r; |
447 | } | |
448 | ||
92bd5ff3 | 449 | int manager_spawn_autovt(Manager *m, unsigned int vtnr) { |
4afd3348 | 450 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
61376f96 | 451 | char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)]; |
2b3ab29d | 452 | int r; |
2b3ab29d ZJS |
453 | |
454 | assert(m); | |
455 | assert(vtnr >= 1); | |
456 | ||
92bd5ff3 DH |
457 | if (vtnr > m->n_autovts && |
458 | vtnr != m->reserve_vt) | |
2b3ab29d ZJS |
459 | return 0; |
460 | ||
92bd5ff3 | 461 | if (vtnr != m->reserve_vt) { |
2b3ab29d ZJS |
462 | /* If this is the reserved TTY, we'll start the getty |
463 | * on it in any case, but otherwise only if it is not | |
464 | * busy. */ | |
465 | ||
466 | r = vt_is_busy(vtnr); | |
467 | if (r < 0) | |
468 | return r; | |
469 | else if (r > 0) | |
470 | return -EBUSY; | |
471 | } | |
472 | ||
61376f96 | 473 | snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr); |
cc377381 | 474 | r = sd_bus_call_method( |
2b3ab29d ZJS |
475 | m->bus, |
476 | "org.freedesktop.systemd1", | |
477 | "/org/freedesktop/systemd1", | |
478 | "org.freedesktop.systemd1.Manager", | |
479 | "StartUnit", | |
cc377381 | 480 | &error, |
2b3ab29d | 481 | NULL, |
cc377381 LP |
482 | "ss", name, "fail"); |
483 | if (r < 0) | |
484 | log_error("Failed to start %s: %s", name, bus_error_message(&error, r)); | |
2b3ab29d ZJS |
485 | |
486 | return r; | |
487 | } | |
2d62c530 | 488 | |
602a41c2 | 489 | static bool manager_is_docked(Manager *m) { |
2d62c530 LP |
490 | Iterator i; |
491 | Button *b; | |
492 | ||
493 | HASHMAP_FOREACH(b, m->buttons, i) | |
494 | if (b->docked) | |
495 | return true; | |
496 | ||
497 | return false; | |
498 | } | |
6a79c586 | 499 | |
602a41c2 | 500 | static int manager_count_external_displays(Manager *m) { |
6a79c586 LP |
501 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
502 | struct udev_list_entry *item = NULL, *first = NULL; | |
503 | int r; | |
504 | int n = 0; | |
505 | ||
506 | e = udev_enumerate_new(m->udev); | |
507 | if (!e) | |
508 | return -ENOMEM; | |
509 | ||
510 | r = udev_enumerate_add_match_subsystem(e, "drm"); | |
511 | if (r < 0) | |
512 | return r; | |
513 | ||
514 | r = udev_enumerate_scan_devices(e); | |
515 | if (r < 0) | |
516 | return r; | |
517 | ||
518 | first = udev_enumerate_get_list_entry(e); | |
519 | udev_list_entry_foreach(item, first) { | |
520 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
521 | struct udev_device *p; | |
602a41c2 LP |
522 | const char *status, *enabled, *dash, *nn, *i; |
523 | bool external = false; | |
6a79c586 LP |
524 | |
525 | d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); | |
526 | if (!d) | |
527 | return -ENOMEM; | |
528 | ||
529 | p = udev_device_get_parent(d); | |
530 | if (!p) | |
94036de8 | 531 | continue; |
6a79c586 LP |
532 | |
533 | /* If the parent shares the same subsystem as the | |
534 | * device we are looking at then it is a connector, | |
535 | * which is what we are interested in. */ | |
536 | if (!streq_ptr(udev_device_get_subsystem(p), "drm")) | |
537 | continue; | |
538 | ||
602a41c2 LP |
539 | nn = udev_device_get_sysname(d); |
540 | if (!nn) | |
541 | continue; | |
542 | ||
543 | /* Ignore internal displays: the type is encoded in | |
6dd6a9c4 | 544 | * the sysfs name, as the second dash separated item |
602a41c2 LP |
545 | * (the first is the card name, the last the connector |
546 | * number). We implement a whitelist of external | |
547 | * displays here, rather than a whitelist, to ensure | |
548 | * we don't block suspends too eagerly. */ | |
549 | dash = strchr(nn, '-'); | |
550 | if (!dash) | |
551 | continue; | |
552 | ||
553 | dash++; | |
554 | FOREACH_STRING(i, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-" | |
555 | "Composite-", "SVIDEO-", "Component-", | |
556 | "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") { | |
557 | ||
558 | if (startswith(dash, i)) { | |
559 | external = true; | |
560 | break; | |
561 | } | |
562 | } | |
563 | if (!external) | |
564 | continue; | |
565 | ||
566 | /* Ignore ports that are not enabled */ | |
567 | enabled = udev_device_get_sysattr_value(d, "enabled"); | |
568 | if (!enabled) | |
569 | continue; | |
570 | if (!streq_ptr(enabled, "enabled")) | |
571 | continue; | |
572 | ||
6a79c586 LP |
573 | /* We count any connector which is not explicitly |
574 | * "disconnected" as connected. */ | |
575 | status = udev_device_get_sysattr_value(d, "status"); | |
576 | if (!streq_ptr(status, "disconnected")) | |
577 | n++; | |
578 | } | |
579 | ||
580 | return n; | |
581 | } | |
3c56cab4 | 582 | |
602a41c2 | 583 | bool manager_is_docked_or_external_displays(Manager *m) { |
3c56cab4 BW |
584 | int n; |
585 | ||
586 | /* If we are docked don't react to lid closing */ | |
587 | if (manager_is_docked(m)) { | |
588 | log_debug("System is docked."); | |
589 | return true; | |
590 | } | |
591 | ||
592 | /* If we have more than one display connected, | |
593 | * assume that we are docked. */ | |
602a41c2 | 594 | n = manager_count_external_displays(m); |
3c56cab4 | 595 | if (n < 0) |
da927ba9 | 596 | log_warning_errno(n, "Display counting failed: %m"); |
602a41c2 LP |
597 | else if (n >= 1) { |
598 | log_debug("External (%i) displays connected.", n); | |
3c56cab4 BW |
599 | return true; |
600 | } | |
601 | ||
602 | return false; | |
603 | } |