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20263082 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <pwd.h> | |
24 | #include <libudev.h> | |
25 | #include <fcntl.h> | |
26 | #include <string.h> | |
27 | #include <unistd.h> | |
28 | #include <sys/epoll.h> | |
5eda94dd LP |
29 | #include <sys/ioctl.h> |
30 | #include <linux/vt.h> | |
20263082 LP |
31 | |
32 | #include "logind.h" | |
33 | #include "dbus-common.h" | |
34 | #include "dbus-loop.h" | |
35 | ||
20263082 LP |
36 | Manager *manager_new(void) { |
37 | Manager *m; | |
38 | ||
39 | m = new0(Manager, 1); | |
40 | if (!m) | |
41 | return NULL; | |
42 | ||
43 | m->console_active_fd = -1; | |
44 | m->bus_fd = -1; | |
30ed21ce LP |
45 | m->udev_seat_fd = -1; |
46 | m->udev_vcsa_fd = -1; | |
20263082 LP |
47 | m->epoll_fd = -1; |
48 | m->n_autovts = 6; | |
49 | ||
50 | m->devices = hashmap_new(string_hash_func, string_compare_func); | |
51 | m->seats = hashmap_new(string_hash_func, string_compare_func); | |
52 | m->sessions = hashmap_new(string_hash_func, string_compare_func); | |
53 | m->users = hashmap_new(trivial_hash_func, trivial_compare_func); | |
1713813d | 54 | m->cgroups = hashmap_new(string_hash_func, string_compare_func); |
932e3ee7 | 55 | m->fifo_fds = hashmap_new(trivial_hash_func, trivial_compare_func); |
20263082 LP |
56 | |
57 | if (!m->devices || !m->seats || !m->sessions || !m->users) { | |
58 | manager_free(m); | |
59 | return NULL; | |
60 | } | |
61 | ||
62 | m->udev = udev_new(); | |
63 | if (!m->udev) { | |
64 | manager_free(m); | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | if (cg_get_user_path(&m->cgroup_path) < 0) { | |
69 | manager_free(m); | |
70 | return NULL; | |
71 | } | |
72 | ||
73 | return m; | |
74 | } | |
75 | ||
76 | void manager_free(Manager *m) { | |
77 | Session *session; | |
78 | User *u; | |
79 | Device *d; | |
80 | Seat *s; | |
81 | ||
82 | assert(m); | |
83 | ||
84 | while ((session = hashmap_first(m->sessions))) | |
85 | session_free(session); | |
86 | ||
87 | while ((u = hashmap_first(m->users))) | |
88 | user_free(u); | |
89 | ||
90 | while ((d = hashmap_first(m->devices))) | |
91 | device_free(d); | |
92 | ||
93 | while ((s = hashmap_first(m->seats))) | |
94 | seat_free(s); | |
95 | ||
96 | hashmap_free(m->sessions); | |
97 | hashmap_free(m->users); | |
98 | hashmap_free(m->devices); | |
99 | hashmap_free(m->seats); | |
1713813d | 100 | hashmap_free(m->cgroups); |
932e3ee7 | 101 | hashmap_free(m->fifo_fds); |
20263082 LP |
102 | |
103 | if (m->console_active_fd >= 0) | |
104 | close_nointr_nofail(m->console_active_fd); | |
105 | ||
30ed21ce LP |
106 | if (m->udev_seat_monitor) |
107 | udev_monitor_unref(m->udev_seat_monitor); | |
108 | ||
109 | if (m->udev_vcsa_monitor) | |
110 | udev_monitor_unref(m->udev_vcsa_monitor); | |
20263082 LP |
111 | |
112 | if (m->udev) | |
113 | udev_unref(m->udev); | |
114 | ||
115 | if (m->bus) { | |
116 | dbus_connection_flush(m->bus); | |
117 | dbus_connection_close(m->bus); | |
118 | dbus_connection_unref(m->bus); | |
119 | } | |
120 | ||
121 | if (m->bus_fd >= 0) | |
122 | close_nointr_nofail(m->bus_fd); | |
123 | ||
124 | if (m->epoll_fd >= 0) | |
125 | close_nointr_nofail(m->epoll_fd); | |
126 | ||
127 | free(m->cgroup_path); | |
128 | free(m); | |
129 | } | |
130 | ||
131 | int manager_add_device(Manager *m, const char *sysfs, Device **_device) { | |
132 | Device *d; | |
133 | ||
134 | assert(m); | |
135 | assert(sysfs); | |
136 | ||
137 | d = hashmap_get(m->devices, sysfs); | |
138 | if (d) { | |
139 | if (_device) | |
140 | *_device = d; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | d = device_new(m, sysfs); | |
146 | if (!d) | |
147 | return -ENOMEM; | |
148 | ||
149 | if (_device) | |
150 | *_device = d; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | int manager_add_seat(Manager *m, const char *id, Seat **_seat) { | |
156 | Seat *s; | |
157 | ||
158 | assert(m); | |
159 | assert(id); | |
160 | ||
161 | s = hashmap_get(m->seats, id); | |
162 | if (s) { | |
163 | if (_seat) | |
164 | *_seat = s; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | s = seat_new(m, id); | |
170 | if (!s) | |
171 | return -ENOMEM; | |
172 | ||
173 | if (_seat) | |
174 | *_seat = s; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | int manager_add_session(Manager *m, User *u, const char *id, Session **_session) { | |
180 | Session *s; | |
181 | ||
182 | assert(m); | |
183 | assert(id); | |
184 | ||
185 | s = hashmap_get(m->sessions, id); | |
186 | if (s) { | |
187 | if (_session) | |
188 | *_session = s; | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | s = session_new(m, u, id); | |
194 | if (!s) | |
195 | return -ENOMEM; | |
196 | ||
197 | if (_session) | |
198 | *_session = s; | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) { | |
204 | User *u; | |
20263082 LP |
205 | |
206 | assert(m); | |
207 | assert(name); | |
208 | ||
209 | u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); | |
210 | if (u) { | |
211 | if (_user) | |
212 | *_user = u; | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | u = user_new(m, uid, gid, name); | |
218 | if (!u) | |
219 | return -ENOMEM; | |
220 | ||
14c3baca LP |
221 | if (_user) |
222 | *_user = u; | |
20263082 | 223 | |
14c3baca | 224 | return 0; |
20263082 LP |
225 | } |
226 | ||
227 | int manager_add_user_by_name(Manager *m, const char *name, User **_user) { | |
228 | struct passwd *p; | |
229 | ||
230 | assert(m); | |
231 | assert(name); | |
232 | ||
233 | errno = 0; | |
234 | p = getpwnam(name); | |
235 | if (!p) | |
236 | return errno ? -errno : -ENOENT; | |
237 | ||
238 | return manager_add_user(m, p->pw_uid, p->pw_gid, name, _user); | |
239 | } | |
240 | ||
241 | int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) { | |
242 | struct passwd *p; | |
243 | ||
244 | assert(m); | |
245 | ||
246 | errno = 0; | |
247 | p = getpwuid(uid); | |
248 | if (!p) | |
249 | return errno ? -errno : -ENOENT; | |
250 | ||
251 | return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user); | |
252 | } | |
253 | ||
30ed21ce | 254 | int manager_process_seat_device(Manager *m, struct udev_device *d) { |
20263082 LP |
255 | Device *device; |
256 | int r; | |
257 | ||
258 | assert(m); | |
259 | ||
3f49d45a LP |
260 | /* FIXME: drop this check as soon as libudev's enum support |
261 | * honours tags and subsystem matches at the same time */ | |
262 | if (!streq_ptr(udev_device_get_subsystem(d), "graphics")) | |
263 | return 0; | |
264 | ||
14c3baca | 265 | if (streq_ptr(udev_device_get_action(d), "remove")) { |
20263082 | 266 | |
3f49d45a LP |
267 | /* FIXME: use syspath instead of sysname here, as soon as fb driver is fixed */ |
268 | device = hashmap_get(m->devices, udev_device_get_sysname(d)); | |
14c3baca LP |
269 | if (!device) |
270 | return 0; | |
20263082 | 271 | |
14c3baca LP |
272 | seat_add_to_gc_queue(device->seat); |
273 | device_free(device); | |
274 | ||
275 | } else { | |
276 | const char *sn; | |
277 | Seat *seat; | |
278 | ||
3f49d45a | 279 | sn = udev_device_get_property_value(d, "ID_SEAT"); |
14c3baca LP |
280 | if (!sn) |
281 | sn = "seat0"; | |
282 | ||
3f49d45a LP |
283 | if (!seat_name_is_valid(sn)) { |
284 | log_warning("Device with invalid seat name %s found, ignoring.", sn); | |
285 | return 0; | |
286 | } | |
14c3baca | 287 | |
3f49d45a | 288 | r = manager_add_device(m, udev_device_get_sysname(d), &device); |
14c3baca LP |
289 | if (r < 0) |
290 | return r; | |
291 | ||
292 | r = manager_add_seat(m, sn, &seat); | |
293 | if (r < 0) { | |
294 | if (!device->seat) | |
295 | device_free(device); | |
296 | ||
297 | return r; | |
298 | } | |
299 | ||
300 | device_attach(device, seat); | |
3f49d45a | 301 | seat_start(seat); |
14c3baca | 302 | } |
20263082 | 303 | |
20263082 LP |
304 | return 0; |
305 | } | |
306 | ||
307 | int manager_enumerate_devices(Manager *m) { | |
308 | struct udev_list_entry *item = NULL, *first = NULL; | |
309 | struct udev_enumerate *e; | |
14c3baca | 310 | int r; |
20263082 LP |
311 | |
312 | assert(m); | |
313 | ||
314 | /* Loads devices from udev and creates seats for them as | |
315 | * necessary */ | |
316 | ||
317 | e = udev_enumerate_new(m->udev); | |
14c3baca LP |
318 | if (!e) { |
319 | r = -ENOMEM; | |
5eda94dd | 320 | goto finish; |
14c3baca | 321 | } |
20263082 | 322 | |
14c3baca LP |
323 | r = udev_enumerate_add_match_subsystem(e, "graphics"); |
324 | if (r < 0) | |
20263082 LP |
325 | goto finish; |
326 | ||
14c3baca LP |
327 | r = udev_enumerate_add_match_tag(e, "seat"); |
328 | if (r < 0) | |
20263082 LP |
329 | goto finish; |
330 | ||
14c3baca LP |
331 | r = udev_enumerate_scan_devices(e); |
332 | if (r < 0) | |
20263082 LP |
333 | goto finish; |
334 | ||
335 | first = udev_enumerate_get_list_entry(e); | |
336 | udev_list_entry_foreach(item, first) { | |
337 | struct udev_device *d; | |
338 | int k; | |
339 | ||
340 | d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); | |
14c3baca LP |
341 | if (!d) { |
342 | r = -ENOMEM; | |
20263082 | 343 | goto finish; |
14c3baca | 344 | } |
20263082 | 345 | |
30ed21ce | 346 | k = manager_process_seat_device(m, d); |
20263082 LP |
347 | udev_device_unref(d); |
348 | ||
349 | if (k < 0) | |
350 | r = k; | |
351 | } | |
352 | ||
353 | finish: | |
354 | if (e) | |
355 | udev_enumerate_unref(e); | |
356 | ||
357 | return r; | |
358 | } | |
359 | ||
360 | int manager_enumerate_seats(Manager *m) { | |
361 | DIR *d; | |
362 | struct dirent *de; | |
363 | int r = 0; | |
364 | ||
365 | assert(m); | |
366 | ||
367 | /* This loads data about seats stored on disk, but does not | |
368 | * actually create any seats. Removes data of seats that no | |
369 | * longer exist. */ | |
370 | ||
371 | d = opendir("/run/systemd/seats"); | |
372 | if (!d) { | |
373 | if (errno == ENOENT) | |
374 | return 0; | |
375 | ||
376 | log_error("Failed to open /run/systemd/seats: %m"); | |
377 | return -errno; | |
378 | } | |
379 | ||
380 | while ((de = readdir(d))) { | |
381 | Seat *s; | |
382 | int k; | |
383 | ||
384 | if (!dirent_is_file(de)) | |
385 | continue; | |
386 | ||
387 | s = hashmap_get(m->seats, de->d_name); | |
388 | if (!s) { | |
389 | unlinkat(dirfd(d), de->d_name, 0); | |
390 | continue; | |
391 | } | |
392 | ||
393 | k = seat_load(s); | |
394 | if (k < 0) | |
395 | r = k; | |
396 | } | |
397 | ||
398 | closedir(d); | |
399 | ||
400 | return r; | |
401 | } | |
402 | ||
403 | static int manager_enumerate_users_from_cgroup(Manager *m) { | |
404 | int r = 0; | |
405 | char *name; | |
406 | DIR *d; | |
407 | ||
408 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d); | |
409 | if (r < 0) { | |
410 | if (r == -ENOENT) | |
411 | return 0; | |
412 | ||
413 | log_error("Failed to open %s: %s", m->cgroup_path, strerror(-r)); | |
414 | return r; | |
415 | } | |
416 | ||
417 | while ((r = cg_read_subgroup(d, &name)) > 0) { | |
418 | User *user; | |
14c3baca LP |
419 | int k; |
420 | ||
421 | k = manager_add_user_by_name(m, name, &user); | |
422 | if (k < 0) { | |
423 | free(name); | |
424 | r = k; | |
425 | continue; | |
426 | } | |
427 | ||
428 | user_add_to_gc_queue(user); | |
429 | ||
430 | if (!user->cgroup_path) | |
431 | if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) { | |
432 | r = -ENOMEM; | |
433 | free(name); | |
434 | break; | |
435 | } | |
20263082 | 436 | |
20263082 | 437 | free(name); |
14c3baca LP |
438 | } |
439 | ||
440 | closedir(d); | |
441 | ||
442 | return r; | |
443 | } | |
20263082 | 444 | |
20263082 | 445 | |
14c3baca LP |
446 | static int manager_enumerate_linger_users(Manager *m) { |
447 | DIR *d; | |
448 | struct dirent *de; | |
449 | int r = 0; | |
450 | ||
451 | d = opendir("/var/lib/systemd/linger"); | |
452 | if (!d) { | |
453 | if (errno == ENOENT) | |
454 | return 0; | |
455 | ||
456 | log_error("Failed to open /var/lib/systemd/linger/: %m"); | |
457 | return -errno; | |
458 | } | |
459 | ||
460 | while ((de = readdir(d))) { | |
461 | int k; | |
462 | ||
463 | if (!dirent_is_file(de)) | |
20263082 LP |
464 | continue; |
465 | ||
14c3baca LP |
466 | k = manager_add_user_by_name(m, de->d_name, NULL); |
467 | if (k < 0) { | |
468 | log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k)); | |
469 | r = k; | |
20263082 LP |
470 | } |
471 | } | |
472 | ||
14c3baca | 473 | closedir(d); |
20263082 LP |
474 | |
475 | return r; | |
476 | } | |
477 | ||
478 | int manager_enumerate_users(Manager *m) { | |
479 | DIR *d; | |
480 | struct dirent *de; | |
14c3baca | 481 | int r, k; |
20263082 LP |
482 | |
483 | assert(m); | |
484 | ||
14c3baca | 485 | /* First, enumerate user cgroups */ |
20263082 LP |
486 | r = manager_enumerate_users_from_cgroup(m); |
487 | ||
14c3baca LP |
488 | /* Second, add lingering users on top */ |
489 | k = manager_enumerate_linger_users(m); | |
490 | if (k < 0) | |
491 | r = k; | |
492 | ||
493 | /* Third, read in user data stored on disk */ | |
20263082 LP |
494 | d = opendir("/run/systemd/users"); |
495 | if (!d) { | |
496 | if (errno == ENOENT) | |
497 | return 0; | |
498 | ||
499 | log_error("Failed to open /run/systemd/users: %m"); | |
500 | return -errno; | |
501 | } | |
502 | ||
503 | while ((de = readdir(d))) { | |
504 | unsigned long ul; | |
505 | User *u; | |
20263082 LP |
506 | |
507 | if (!dirent_is_file(de)) | |
508 | continue; | |
509 | ||
510 | k = safe_atolu(de->d_name, &ul); | |
511 | if (k < 0) { | |
512 | log_error("Failed to parse file name %s: %s", de->d_name, strerror(-k)); | |
513 | continue; | |
514 | } | |
515 | ||
516 | u = hashmap_get(m->users, ULONG_TO_PTR(ul)); | |
517 | if (!u) { | |
518 | unlinkat(dirfd(d), de->d_name, 0); | |
519 | continue; | |
520 | } | |
521 | ||
522 | k = user_load(u); | |
523 | if (k < 0) | |
524 | r = k; | |
525 | } | |
526 | ||
527 | closedir(d); | |
528 | ||
529 | return r; | |
530 | } | |
531 | ||
532 | static int manager_enumerate_sessions_from_cgroup(Manager *m) { | |
533 | User *u; | |
534 | Iterator i; | |
535 | int r = 0; | |
536 | ||
537 | HASHMAP_FOREACH(u, m->users, i) { | |
538 | DIR *d; | |
539 | char *name; | |
540 | int k; | |
541 | ||
14c3baca LP |
542 | if (!u->cgroup_path) |
543 | continue; | |
544 | ||
20263082 LP |
545 | k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d); |
546 | if (k < 0) { | |
547 | if (k == -ENOENT) | |
548 | continue; | |
549 | ||
550 | log_error("Failed to open %s: %s", u->cgroup_path, strerror(-k)); | |
551 | r = k; | |
552 | continue; | |
553 | } | |
554 | ||
555 | while ((k = cg_read_subgroup(d, &name)) > 0) { | |
556 | Session *session; | |
557 | ||
558 | k = manager_add_session(m, u, name, &session); | |
14c3baca LP |
559 | if (k < 0) { |
560 | free(name); | |
20263082 | 561 | break; |
14c3baca | 562 | } |
20263082 | 563 | |
14c3baca | 564 | session_add_to_gc_queue(session); |
20263082 | 565 | |
14c3baca LP |
566 | if (!session->cgroup_path) |
567 | if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) { | |
568 | k = -ENOMEM; | |
569 | free(name); | |
570 | break; | |
571 | } | |
572 | ||
573 | free(name); | |
20263082 LP |
574 | } |
575 | ||
576 | closedir(d); | |
577 | ||
578 | if (k < 0) | |
579 | r = k; | |
580 | } | |
581 | ||
582 | return r; | |
583 | } | |
584 | ||
585 | int manager_enumerate_sessions(Manager *m) { | |
586 | DIR *d; | |
587 | struct dirent *de; | |
588 | int r = 0; | |
589 | ||
590 | assert(m); | |
591 | ||
14c3baca | 592 | /* First enumerate session cgroups */ |
20263082 LP |
593 | r = manager_enumerate_sessions_from_cgroup(m); |
594 | ||
14c3baca | 595 | /* Second, read in session data stored on disk */ |
20263082 LP |
596 | d = opendir("/run/systemd/sessions"); |
597 | if (!d) { | |
598 | if (errno == ENOENT) | |
599 | return 0; | |
600 | ||
601 | log_error("Failed to open /run/systemd/sessions: %m"); | |
602 | return -errno; | |
603 | } | |
604 | ||
605 | while ((de = readdir(d))) { | |
606 | struct Session *s; | |
607 | int k; | |
608 | ||
609 | if (!dirent_is_file(de)) | |
610 | continue; | |
611 | ||
612 | s = hashmap_get(m->sessions, de->d_name); | |
613 | if (!s) { | |
614 | unlinkat(dirfd(d), de->d_name, 0); | |
615 | continue; | |
616 | } | |
617 | ||
618 | k = session_load(s); | |
619 | if (k < 0) | |
620 | r = k; | |
621 | } | |
622 | ||
623 | closedir(d); | |
624 | ||
625 | return r; | |
626 | } | |
627 | ||
30ed21ce | 628 | int manager_dispatch_seat_udev(Manager *m) { |
20263082 LP |
629 | struct udev_device *d; |
630 | int r; | |
631 | ||
632 | assert(m); | |
633 | ||
30ed21ce | 634 | d = udev_monitor_receive_device(m->udev_seat_monitor); |
20263082 LP |
635 | if (!d) |
636 | return -ENOMEM; | |
637 | ||
30ed21ce LP |
638 | r = manager_process_seat_device(m, d); |
639 | udev_device_unref(d); | |
640 | ||
641 | return r; | |
642 | } | |
643 | ||
644 | ||
645 | int manager_dispatch_vcsa_udev(Manager *m) { | |
646 | struct udev_device *d; | |
647 | int r = 0; | |
648 | const char *name; | |
649 | ||
650 | assert(m); | |
651 | ||
652 | d = udev_monitor_receive_device(m->udev_vcsa_monitor); | |
653 | if (!d) | |
654 | return -ENOMEM; | |
655 | ||
656 | name = udev_device_get_sysname(d); | |
657 | ||
658 | /* Whenever a VCSA device is removed try to reallocate our | |
659 | * VTs, to make sure our auto VTs never go away. */ | |
660 | ||
661 | if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove")) | |
662 | r = seat_preallocate_vts(m->vtconsole); | |
663 | ||
20263082 LP |
664 | udev_device_unref(d); |
665 | ||
666 | return r; | |
667 | } | |
668 | ||
669 | int manager_dispatch_console(Manager *m) { | |
20263082 LP |
670 | assert(m); |
671 | ||
20263082 | 672 | if (m->vtconsole) |
14c3baca | 673 | seat_read_active_vt(m->vtconsole); |
20263082 LP |
674 | |
675 | return 0; | |
676 | } | |
677 | ||
5eda94dd LP |
678 | static int vt_is_busy(int vtnr) { |
679 | struct vt_stat vt_stat; | |
680 | int r = 0, fd; | |
681 | ||
682 | assert(vtnr >= 1); | |
683 | ||
d0a522eb LP |
684 | /* We explicitly open /dev/tty1 here instead of /dev/tty0. If |
685 | * we'd open the latter we'd open the foreground tty which | |
686 | * hence would be unconditionally busy. By opening /dev/tty1 | |
687 | * we avoid this. Since tty1 is special and needs to be an | |
688 | * explicitly loaded getty or DM this is safe. */ | |
689 | ||
690 | fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC); | |
5eda94dd LP |
691 | if (fd < 0) |
692 | return -errno; | |
693 | ||
694 | if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0) | |
695 | r = -errno; | |
696 | else | |
697 | r = !!(vt_stat.v_state & (1 << vtnr)); | |
698 | ||
699 | close_nointr_nofail(fd); | |
700 | ||
701 | return r; | |
702 | } | |
703 | ||
20263082 | 704 | int manager_spawn_autovt(Manager *m, int vtnr) { |
5eda94dd | 705 | int r; |
d0a522eb LP |
706 | DBusMessage *message = NULL, *reply = NULL; |
707 | char *name = NULL; | |
708 | const char *mode = "fail"; | |
709 | DBusError error; | |
5eda94dd | 710 | |
20263082 | 711 | assert(m); |
30ed21ce | 712 | assert(vtnr >= 1); |
20263082 | 713 | |
d0a522eb LP |
714 | dbus_error_init(&error); |
715 | ||
30ed21ce | 716 | if ((unsigned) vtnr > m->n_autovts) |
975fd867 LP |
717 | return 0; |
718 | ||
5eda94dd | 719 | r = vt_is_busy(vtnr); |
975fd867 | 720 | if (r < 0) |
5eda94dd | 721 | return r; |
975fd867 LP |
722 | else if (r > 0) |
723 | return -EBUSY; | |
5eda94dd | 724 | |
d0a522eb LP |
725 | message = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"); |
726 | if (!message) { | |
727 | log_error("Could not allocate message."); | |
728 | r = -ENOMEM; | |
729 | goto finish; | |
730 | } | |
5eda94dd | 731 | |
cd9e5d0a | 732 | if (asprintf(&name, "autovt@tty%i.service", vtnr) < 0) { |
d0a522eb LP |
733 | log_error("Could not allocate service name."); |
734 | r = -ENOMEM; | |
735 | goto finish; | |
736 | } | |
737 | ||
738 | if (!dbus_message_append_args(message, | |
739 | DBUS_TYPE_STRING, &name, | |
740 | DBUS_TYPE_STRING, &mode, | |
741 | DBUS_TYPE_INVALID)) { | |
742 | log_error("Could not attach target and flag information to message."); | |
743 | r = -ENOMEM; | |
744 | goto finish; | |
745 | } | |
746 | ||
747 | reply = dbus_connection_send_with_reply_and_block(m->bus, message, -1, &error); | |
748 | if (!reply) { | |
749 | log_error("Failed to start unit: %s", bus_error_message(&error)); | |
750 | goto finish; | |
751 | } | |
752 | ||
753 | r = 0; | |
754 | ||
755 | finish: | |
756 | free(name); | |
757 | ||
758 | if (message) | |
759 | dbus_message_unref(message); | |
760 | ||
761 | if (reply) | |
762 | dbus_message_unref(reply); | |
763 | ||
764 | dbus_error_free(&error); | |
765 | ||
766 | return r; | |
20263082 LP |
767 | } |
768 | ||
1713813d LP |
769 | void manager_cgroup_notify_empty(Manager *m, const char *cgroup) { |
770 | Session *s; | |
771 | char *p; | |
772 | ||
773 | assert(m); | |
774 | assert(cgroup); | |
775 | ||
776 | p = strdup(cgroup); | |
777 | if (!p) { | |
778 | log_error("Out of memory."); | |
779 | return; | |
780 | } | |
781 | ||
782 | for (;;) { | |
783 | char *e; | |
20263082 | 784 | |
1713813d LP |
785 | if (isempty(p) || streq(p, "/")) |
786 | break; | |
787 | ||
788 | s = hashmap_get(m->cgroups, p); | |
789 | if (s) | |
790 | session_add_to_gc_queue(s); | |
791 | ||
792 | assert_se(e = strrchr(p, '/')); | |
793 | *e = 0; | |
794 | } | |
795 | ||
796 | free(p); | |
20263082 LP |
797 | } |
798 | ||
31b79c2b LP |
799 | static void manager_pipe_notify_eof(Manager *m, int fd) { |
800 | Session *s; | |
801 | ||
802 | assert_se(m); | |
803 | assert_se(fd >= 0); | |
804 | ||
932e3ee7 LP |
805 | assert_se(s = hashmap_get(m->fifo_fds, INT_TO_PTR(fd + 1))); |
806 | assert(s->fifo_fd == fd); | |
807 | session_remove_fifo(s); | |
31b79c2b | 808 | |
21308c65 | 809 | session_stop(s); |
31b79c2b LP |
810 | } |
811 | ||
20263082 | 812 | static int manager_connect_bus(Manager *m) { |
20263082 LP |
813 | DBusError error; |
814 | int r; | |
815 | struct epoll_event ev; | |
816 | ||
817 | assert(m); | |
818 | assert(!m->bus); | |
819 | assert(m->bus_fd < 0); | |
820 | ||
821 | dbus_error_init(&error); | |
822 | ||
823 | m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error); | |
824 | if (!m->bus) { | |
a2e52832 | 825 | log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error)); |
20263082 LP |
826 | r = -ECONNREFUSED; |
827 | goto fail; | |
828 | } | |
829 | ||
3f49d45a LP |
830 | if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) || |
831 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) || | |
832 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) || | |
833 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) || | |
1713813d | 834 | !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) { |
20263082 LP |
835 | log_error("Not enough memory"); |
836 | r = -ENOMEM; | |
837 | goto fail; | |
838 | } | |
839 | ||
840 | dbus_bus_add_match(m->bus, | |
841 | "type='signal'," | |
842 | "interface='org.freedesktop.systemd1.Agent'," | |
843 | "member='Released'," | |
844 | "path='/org/freedesktop/systemd1/agent'", | |
845 | &error); | |
846 | ||
847 | if (dbus_error_is_set(&error)) { | |
a2e52832 | 848 | log_error("Failed to register match: %s", bus_error_message(&error)); |
20263082 LP |
849 | r = -EIO; |
850 | goto fail; | |
851 | } | |
852 | ||
bafd4449 LP |
853 | r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error); |
854 | if (dbus_error_is_set(&error)) { | |
855 | log_error("Failed to register name on bus: %s", bus_error_message(&error)); | |
856 | r = -EIO; | |
857 | goto fail; | |
858 | } | |
859 | ||
860 | if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { | |
861 | log_error("Failed to acquire name."); | |
20263082 LP |
862 | r = -EEXIST; |
863 | goto fail; | |
864 | } | |
865 | ||
866 | m->bus_fd = bus_loop_open(m->bus); | |
867 | if (m->bus_fd < 0) { | |
868 | r = m->bus_fd; | |
869 | goto fail; | |
870 | } | |
871 | ||
872 | zero(ev); | |
873 | ev.events = EPOLLIN; | |
874 | ev.data.u32 = FD_BUS; | |
875 | ||
876 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0) | |
877 | goto fail; | |
878 | ||
879 | return 0; | |
880 | ||
881 | fail: | |
882 | dbus_error_free(&error); | |
883 | ||
884 | return r; | |
885 | } | |
886 | ||
887 | static int manager_connect_console(Manager *m) { | |
888 | struct epoll_event ev; | |
889 | ||
890 | assert(m); | |
891 | assert(m->console_active_fd < 0); | |
892 | ||
893 | m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
894 | if (m->console_active_fd < 0) { | |
895 | log_error("Failed to open /sys/class/tty/tty0/active: %m"); | |
896 | return -errno; | |
897 | } | |
898 | ||
899 | zero(ev); | |
14c3baca | 900 | ev.events = 0; |
20263082 LP |
901 | ev.data.u32 = FD_CONSOLE; |
902 | ||
903 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0) | |
904 | return -errno; | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static int manager_connect_udev(Manager *m) { | |
910 | struct epoll_event ev; | |
14c3baca | 911 | int r; |
20263082 LP |
912 | |
913 | assert(m); | |
30ed21ce LP |
914 | assert(!m->udev_seat_monitor); |
915 | assert(!m->udev_vcsa_monitor); | |
20263082 | 916 | |
30ed21ce LP |
917 | m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); |
918 | if (!m->udev_seat_monitor) | |
20263082 LP |
919 | return -ENOMEM; |
920 | ||
30ed21ce | 921 | r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "seat"); |
14c3baca LP |
922 | if (r < 0) |
923 | return r; | |
20263082 | 924 | |
30ed21ce | 925 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_seat_monitor, "graphics", NULL); |
14c3baca LP |
926 | if (r < 0) |
927 | return r; | |
20263082 | 928 | |
30ed21ce | 929 | r = udev_monitor_enable_receiving(m->udev_seat_monitor); |
14c3baca LP |
930 | if (r < 0) |
931 | return r; | |
20263082 | 932 | |
30ed21ce | 933 | m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor); |
20263082 LP |
934 | |
935 | zero(ev); | |
936 | ev.events = EPOLLIN; | |
30ed21ce | 937 | ev.data.u32 = FD_SEAT_UDEV; |
20263082 | 938 | |
30ed21ce LP |
939 | if (m->n_autovts <= 0) |
940 | return 0; | |
941 | ||
942 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0) | |
943 | return -errno; | |
944 | ||
945 | m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); | |
946 | if (!m->udev_vcsa_monitor) | |
947 | return -ENOMEM; | |
948 | ||
949 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL); | |
950 | if (r < 0) | |
951 | return r; | |
952 | ||
953 | r = udev_monitor_enable_receiving(m->udev_vcsa_monitor); | |
954 | if (r < 0) | |
955 | return r; | |
956 | ||
957 | m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor); | |
958 | ||
959 | zero(ev); | |
960 | ev.events = EPOLLIN; | |
961 | ev.data.u32 = FD_VCSA_UDEV; | |
962 | ||
963 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0) | |
20263082 LP |
964 | return -errno; |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
14c3baca LP |
969 | void manager_gc(Manager *m) { |
970 | Seat *seat; | |
971 | Session *session; | |
972 | User *user; | |
973 | ||
974 | assert(m); | |
975 | ||
976 | while ((seat = m->seat_gc_queue)) { | |
977 | LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat); | |
978 | seat->in_gc_queue = false; | |
979 | ||
980 | if (seat_check_gc(seat) == 0) { | |
981 | seat_stop(seat); | |
982 | seat_free(seat); | |
983 | } | |
984 | } | |
985 | ||
986 | while ((session = m->session_gc_queue)) { | |
987 | LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session); | |
988 | session->in_gc_queue = false; | |
989 | ||
990 | if (session_check_gc(session) == 0) { | |
991 | session_stop(session); | |
992 | session_free(session); | |
993 | } | |
994 | } | |
995 | ||
996 | while ((user = m->user_gc_queue)) { | |
997 | LIST_REMOVE(User, gc_queue, m->user_gc_queue, user); | |
998 | user->in_gc_queue = false; | |
999 | ||
1000 | if (user_check_gc(user) == 0) { | |
1001 | user_stop(user); | |
1002 | user_free(user); | |
1003 | } | |
1004 | } | |
1005 | } | |
1006 | ||
a185c5aa LP |
1007 | int manager_get_idle_hint(Manager *m, dual_timestamp *t) { |
1008 | Session *s; | |
1009 | bool idle_hint = true; | |
1010 | dual_timestamp ts = { 0, 0 }; | |
1011 | Iterator i; | |
1012 | ||
1013 | assert(m); | |
1014 | ||
1015 | HASHMAP_FOREACH(s, m->sessions, i) { | |
1016 | dual_timestamp k; | |
1017 | int ih; | |
1018 | ||
1019 | ih = session_get_idle_hint(s, &k); | |
1020 | if (ih < 0) | |
1021 | return ih; | |
1022 | ||
1023 | if (!ih) { | |
1024 | if (!idle_hint) { | |
1025 | if (k.monotonic < ts.monotonic) | |
1026 | ts = k; | |
1027 | } else { | |
1028 | idle_hint = false; | |
1029 | ts = k; | |
1030 | } | |
1031 | } else if (idle_hint) { | |
1032 | ||
1033 | if (k.monotonic > ts.monotonic) | |
1034 | ts = k; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (t) | |
1039 | *t = ts; | |
1040 | ||
1041 | return idle_hint; | |
1042 | } | |
1043 | ||
20263082 LP |
1044 | int manager_startup(Manager *m) { |
1045 | int r; | |
14c3baca LP |
1046 | Seat *seat; |
1047 | Session *session; | |
1048 | User *user; | |
1049 | Iterator i; | |
20263082 LP |
1050 | |
1051 | assert(m); | |
1052 | assert(m->epoll_fd <= 0); | |
1053 | ||
1054 | m->epoll_fd = epoll_create1(EPOLL_CLOEXEC); | |
1055 | if (m->epoll_fd < 0) | |
1056 | return -errno; | |
1057 | ||
1058 | /* Connect to udev */ | |
1059 | r = manager_connect_udev(m); | |
1060 | if (r < 0) | |
1061 | return r; | |
1062 | ||
1063 | /* Connect to console */ | |
1064 | r = manager_connect_console(m); | |
1065 | if (r < 0) | |
1066 | return r; | |
1067 | ||
1068 | /* Connect to the bus */ | |
1069 | r = manager_connect_bus(m); | |
1070 | if (r < 0) | |
1071 | return r; | |
1072 | ||
14c3baca LP |
1073 | /* Instantiate magic seat 0 */ |
1074 | r = manager_add_seat(m, "seat0", &m->vtconsole); | |
1075 | if (r < 0) | |
1076 | return r; | |
1077 | ||
20263082 LP |
1078 | /* Deserialize state */ |
1079 | manager_enumerate_devices(m); | |
1080 | manager_enumerate_seats(m); | |
1081 | manager_enumerate_users(m); | |
1082 | manager_enumerate_sessions(m); | |
1083 | ||
14c3baca LP |
1084 | /* And start everything */ |
1085 | HASHMAP_FOREACH(seat, m->seats, i) | |
1086 | seat_start(seat); | |
1087 | ||
1088 | HASHMAP_FOREACH(user, m->users, i) | |
1089 | user_start(user); | |
1090 | ||
1091 | HASHMAP_FOREACH(session, m->sessions, i) | |
1092 | session_start(session); | |
20263082 LP |
1093 | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | int manager_run(Manager *m) { | |
1098 | assert(m); | |
1099 | ||
1100 | for (;;) { | |
1101 | struct epoll_event event; | |
1102 | int n; | |
1103 | ||
14c3baca LP |
1104 | manager_gc(m); |
1105 | ||
20263082 LP |
1106 | if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE) |
1107 | continue; | |
1108 | ||
1713813d LP |
1109 | manager_gc(m); |
1110 | ||
20263082 LP |
1111 | n = epoll_wait(m->epoll_fd, &event, 1, -1); |
1112 | if (n < 0) { | |
3f49d45a LP |
1113 | if (errno == EINTR || errno == EAGAIN) |
1114 | continue; | |
1115 | ||
20263082 LP |
1116 | log_error("epoll() failed: %m"); |
1117 | return -errno; | |
1118 | } | |
1119 | ||
1120 | switch (event.data.u32) { | |
1121 | ||
30ed21ce LP |
1122 | case FD_SEAT_UDEV: |
1123 | manager_dispatch_seat_udev(m); | |
1124 | break; | |
1125 | ||
1126 | case FD_VCSA_UDEV: | |
1127 | manager_dispatch_vcsa_udev(m); | |
20263082 LP |
1128 | break; |
1129 | ||
1130 | case FD_CONSOLE: | |
1131 | manager_dispatch_console(m); | |
1132 | break; | |
1133 | ||
1134 | case FD_BUS: | |
1135 | bus_loop_dispatch(m->bus_fd); | |
1136 | break; | |
31b79c2b LP |
1137 | |
1138 | default: | |
932e3ee7 LP |
1139 | if (event.data.u32 >= FD_FIFO_BASE) |
1140 | manager_pipe_notify_eof(m, event.data.u32 - FD_FIFO_BASE); | |
20263082 LP |
1141 | } |
1142 | } | |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | int main(int argc, char *argv[]) { | |
1148 | Manager *m = NULL; | |
5eda94dd | 1149 | int r; |
20263082 LP |
1150 | |
1151 | log_set_target(LOG_TARGET_AUTO); | |
1152 | log_parse_environment(); | |
1153 | log_open(); | |
1154 | ||
1155 | if (argc != 1) { | |
1156 | log_error("This program takes no arguments."); | |
1157 | r = -EINVAL; | |
1158 | goto finish; | |
1159 | } | |
1160 | ||
1161 | umask(0022); | |
1162 | ||
1163 | m = manager_new(); | |
1164 | if (!m) { | |
1165 | log_error("Out of memory"); | |
1166 | r = -ENOMEM; | |
1167 | goto finish; | |
1168 | } | |
1169 | ||
1170 | r = manager_startup(m); | |
1171 | if (r < 0) { | |
1172 | log_error("Failed to fully start up daemon: %s", strerror(-r)); | |
1173 | goto finish; | |
1174 | } | |
1175 | ||
1176 | r = manager_run(m); | |
1177 | ||
1178 | finish: | |
1179 | if (m) | |
1180 | manager_free(m); | |
1181 | ||
1182 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1183 | } |