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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" | |
193197e8 LP |
35 | #include "strv.h" |
36 | #include "conf-parser.h" | |
20263082 | 37 | |
20263082 LP |
38 | Manager *manager_new(void) { |
39 | Manager *m; | |
40 | ||
41 | m = new0(Manager, 1); | |
42 | if (!m) | |
43 | return NULL; | |
44 | ||
45 | m->console_active_fd = -1; | |
46 | m->bus_fd = -1; | |
30ed21ce LP |
47 | m->udev_seat_fd = -1; |
48 | m->udev_vcsa_fd = -1; | |
20263082 LP |
49 | m->epoll_fd = -1; |
50 | m->n_autovts = 6; | |
51 | ||
52 | m->devices = hashmap_new(string_hash_func, string_compare_func); | |
53 | m->seats = hashmap_new(string_hash_func, string_compare_func); | |
54 | m->sessions = hashmap_new(string_hash_func, string_compare_func); | |
55 | m->users = hashmap_new(trivial_hash_func, trivial_compare_func); | |
1713813d | 56 | m->cgroups = hashmap_new(string_hash_func, string_compare_func); |
932e3ee7 | 57 | m->fifo_fds = hashmap_new(trivial_hash_func, trivial_compare_func); |
20263082 | 58 | |
25d93491 LP |
59 | if (!m->devices || !m->seats || !m->sessions || !m->users || !m->cgroups || !m->fifo_fds) { |
60 | manager_free(m); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | m->reset_controllers = strv_new("cpu", NULL); | |
65 | m->kill_exclude_users = strv_new("root", NULL); | |
66 | if (!m->reset_controllers || !m->kill_exclude_users) { | |
20263082 LP |
67 | manager_free(m); |
68 | return NULL; | |
69 | } | |
70 | ||
71 | m->udev = udev_new(); | |
72 | if (!m->udev) { | |
73 | manager_free(m); | |
74 | return NULL; | |
75 | } | |
76 | ||
77 | if (cg_get_user_path(&m->cgroup_path) < 0) { | |
78 | manager_free(m); | |
79 | return NULL; | |
80 | } | |
81 | ||
82 | return m; | |
83 | } | |
84 | ||
85 | void manager_free(Manager *m) { | |
86 | Session *session; | |
87 | User *u; | |
88 | Device *d; | |
89 | Seat *s; | |
90 | ||
91 | assert(m); | |
92 | ||
93 | while ((session = hashmap_first(m->sessions))) | |
94 | session_free(session); | |
95 | ||
96 | while ((u = hashmap_first(m->users))) | |
97 | user_free(u); | |
98 | ||
99 | while ((d = hashmap_first(m->devices))) | |
100 | device_free(d); | |
101 | ||
102 | while ((s = hashmap_first(m->seats))) | |
103 | seat_free(s); | |
104 | ||
105 | hashmap_free(m->sessions); | |
106 | hashmap_free(m->users); | |
107 | hashmap_free(m->devices); | |
108 | hashmap_free(m->seats); | |
1713813d | 109 | hashmap_free(m->cgroups); |
932e3ee7 | 110 | hashmap_free(m->fifo_fds); |
20263082 LP |
111 | |
112 | if (m->console_active_fd >= 0) | |
113 | close_nointr_nofail(m->console_active_fd); | |
114 | ||
30ed21ce LP |
115 | if (m->udev_seat_monitor) |
116 | udev_monitor_unref(m->udev_seat_monitor); | |
117 | ||
118 | if (m->udev_vcsa_monitor) | |
119 | udev_monitor_unref(m->udev_vcsa_monitor); | |
20263082 LP |
120 | |
121 | if (m->udev) | |
122 | udev_unref(m->udev); | |
123 | ||
124 | if (m->bus) { | |
125 | dbus_connection_flush(m->bus); | |
126 | dbus_connection_close(m->bus); | |
127 | dbus_connection_unref(m->bus); | |
128 | } | |
129 | ||
130 | if (m->bus_fd >= 0) | |
131 | close_nointr_nofail(m->bus_fd); | |
132 | ||
133 | if (m->epoll_fd >= 0) | |
134 | close_nointr_nofail(m->epoll_fd); | |
135 | ||
193197e8 LP |
136 | strv_free(m->controllers); |
137 | strv_free(m->reset_controllers); | |
138 | strv_free(m->kill_only_users); | |
139 | strv_free(m->kill_exclude_users); | |
140 | ||
20263082 LP |
141 | free(m->cgroup_path); |
142 | free(m); | |
143 | } | |
144 | ||
145 | int manager_add_device(Manager *m, const char *sysfs, Device **_device) { | |
146 | Device *d; | |
147 | ||
148 | assert(m); | |
149 | assert(sysfs); | |
150 | ||
151 | d = hashmap_get(m->devices, sysfs); | |
152 | if (d) { | |
153 | if (_device) | |
154 | *_device = d; | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | d = device_new(m, sysfs); | |
160 | if (!d) | |
161 | return -ENOMEM; | |
162 | ||
163 | if (_device) | |
164 | *_device = d; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | int manager_add_seat(Manager *m, const char *id, Seat **_seat) { | |
170 | Seat *s; | |
171 | ||
172 | assert(m); | |
173 | assert(id); | |
174 | ||
175 | s = hashmap_get(m->seats, id); | |
176 | if (s) { | |
177 | if (_seat) | |
178 | *_seat = s; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | s = seat_new(m, id); | |
184 | if (!s) | |
185 | return -ENOMEM; | |
186 | ||
187 | if (_seat) | |
188 | *_seat = s; | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | int manager_add_session(Manager *m, User *u, const char *id, Session **_session) { | |
194 | Session *s; | |
195 | ||
196 | assert(m); | |
197 | assert(id); | |
198 | ||
199 | s = hashmap_get(m->sessions, id); | |
200 | if (s) { | |
201 | if (_session) | |
202 | *_session = s; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | s = session_new(m, u, id); | |
208 | if (!s) | |
209 | return -ENOMEM; | |
210 | ||
211 | if (_session) | |
212 | *_session = s; | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) { | |
218 | User *u; | |
20263082 LP |
219 | |
220 | assert(m); | |
221 | assert(name); | |
222 | ||
223 | u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); | |
224 | if (u) { | |
225 | if (_user) | |
226 | *_user = u; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | u = user_new(m, uid, gid, name); | |
232 | if (!u) | |
233 | return -ENOMEM; | |
234 | ||
14c3baca LP |
235 | if (_user) |
236 | *_user = u; | |
20263082 | 237 | |
14c3baca | 238 | return 0; |
20263082 LP |
239 | } |
240 | ||
241 | int manager_add_user_by_name(Manager *m, const char *name, User **_user) { | |
242 | struct passwd *p; | |
243 | ||
244 | assert(m); | |
245 | assert(name); | |
246 | ||
247 | errno = 0; | |
248 | p = getpwnam(name); | |
249 | if (!p) | |
250 | return errno ? -errno : -ENOENT; | |
251 | ||
252 | return manager_add_user(m, p->pw_uid, p->pw_gid, name, _user); | |
253 | } | |
254 | ||
255 | int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) { | |
256 | struct passwd *p; | |
257 | ||
258 | assert(m); | |
259 | ||
260 | errno = 0; | |
261 | p = getpwuid(uid); | |
262 | if (!p) | |
263 | return errno ? -errno : -ENOENT; | |
264 | ||
265 | return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user); | |
266 | } | |
267 | ||
30ed21ce | 268 | int manager_process_seat_device(Manager *m, struct udev_device *d) { |
20263082 LP |
269 | Device *device; |
270 | int r; | |
271 | ||
272 | assert(m); | |
273 | ||
14c3baca | 274 | if (streq_ptr(udev_device_get_action(d), "remove")) { |
20263082 | 275 | |
3f49d45a LP |
276 | /* FIXME: use syspath instead of sysname here, as soon as fb driver is fixed */ |
277 | device = hashmap_get(m->devices, udev_device_get_sysname(d)); | |
14c3baca LP |
278 | if (!device) |
279 | return 0; | |
20263082 | 280 | |
14c3baca LP |
281 | seat_add_to_gc_queue(device->seat); |
282 | device_free(device); | |
283 | ||
284 | } else { | |
285 | const char *sn; | |
286 | Seat *seat; | |
287 | ||
3f49d45a | 288 | sn = udev_device_get_property_value(d, "ID_SEAT"); |
53907215 | 289 | if (isempty(sn)) |
14c3baca LP |
290 | sn = "seat0"; |
291 | ||
3f49d45a LP |
292 | if (!seat_name_is_valid(sn)) { |
293 | log_warning("Device with invalid seat name %s found, ignoring.", sn); | |
294 | return 0; | |
295 | } | |
14c3baca | 296 | |
3f49d45a | 297 | r = manager_add_device(m, udev_device_get_sysname(d), &device); |
14c3baca LP |
298 | if (r < 0) |
299 | return r; | |
300 | ||
301 | r = manager_add_seat(m, sn, &seat); | |
302 | if (r < 0) { | |
303 | if (!device->seat) | |
304 | device_free(device); | |
305 | ||
306 | return r; | |
307 | } | |
308 | ||
309 | device_attach(device, seat); | |
3f49d45a | 310 | seat_start(seat); |
14c3baca | 311 | } |
20263082 | 312 | |
20263082 LP |
313 | return 0; |
314 | } | |
315 | ||
316 | int manager_enumerate_devices(Manager *m) { | |
317 | struct udev_list_entry *item = NULL, *first = NULL; | |
318 | struct udev_enumerate *e; | |
14c3baca | 319 | int r; |
20263082 LP |
320 | |
321 | assert(m); | |
322 | ||
323 | /* Loads devices from udev and creates seats for them as | |
324 | * necessary */ | |
325 | ||
326 | e = udev_enumerate_new(m->udev); | |
14c3baca LP |
327 | if (!e) { |
328 | r = -ENOMEM; | |
5eda94dd | 329 | goto finish; |
14c3baca | 330 | } |
20263082 | 331 | |
14c3baca LP |
332 | r = udev_enumerate_add_match_subsystem(e, "graphics"); |
333 | if (r < 0) | |
20263082 LP |
334 | goto finish; |
335 | ||
14c3baca LP |
336 | r = udev_enumerate_add_match_tag(e, "seat"); |
337 | if (r < 0) | |
20263082 LP |
338 | goto finish; |
339 | ||
14c3baca LP |
340 | r = udev_enumerate_scan_devices(e); |
341 | if (r < 0) | |
20263082 LP |
342 | goto finish; |
343 | ||
344 | first = udev_enumerate_get_list_entry(e); | |
345 | udev_list_entry_foreach(item, first) { | |
346 | struct udev_device *d; | |
347 | int k; | |
348 | ||
349 | d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); | |
14c3baca LP |
350 | if (!d) { |
351 | r = -ENOMEM; | |
20263082 | 352 | goto finish; |
14c3baca | 353 | } |
20263082 | 354 | |
30ed21ce | 355 | k = manager_process_seat_device(m, d); |
20263082 LP |
356 | udev_device_unref(d); |
357 | ||
358 | if (k < 0) | |
359 | r = k; | |
360 | } | |
361 | ||
362 | finish: | |
363 | if (e) | |
364 | udev_enumerate_unref(e); | |
365 | ||
366 | return r; | |
367 | } | |
368 | ||
369 | int manager_enumerate_seats(Manager *m) { | |
370 | DIR *d; | |
371 | struct dirent *de; | |
372 | int r = 0; | |
373 | ||
374 | assert(m); | |
375 | ||
376 | /* This loads data about seats stored on disk, but does not | |
377 | * actually create any seats. Removes data of seats that no | |
378 | * longer exist. */ | |
379 | ||
380 | d = opendir("/run/systemd/seats"); | |
381 | if (!d) { | |
382 | if (errno == ENOENT) | |
383 | return 0; | |
384 | ||
385 | log_error("Failed to open /run/systemd/seats: %m"); | |
386 | return -errno; | |
387 | } | |
388 | ||
389 | while ((de = readdir(d))) { | |
390 | Seat *s; | |
391 | int k; | |
392 | ||
393 | if (!dirent_is_file(de)) | |
394 | continue; | |
395 | ||
396 | s = hashmap_get(m->seats, de->d_name); | |
397 | if (!s) { | |
398 | unlinkat(dirfd(d), de->d_name, 0); | |
399 | continue; | |
400 | } | |
401 | ||
402 | k = seat_load(s); | |
403 | if (k < 0) | |
404 | r = k; | |
405 | } | |
406 | ||
407 | closedir(d); | |
408 | ||
409 | return r; | |
410 | } | |
411 | ||
412 | static int manager_enumerate_users_from_cgroup(Manager *m) { | |
413 | int r = 0; | |
414 | char *name; | |
415 | DIR *d; | |
416 | ||
417 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d); | |
418 | if (r < 0) { | |
419 | if (r == -ENOENT) | |
420 | return 0; | |
421 | ||
422 | log_error("Failed to open %s: %s", m->cgroup_path, strerror(-r)); | |
423 | return r; | |
424 | } | |
425 | ||
426 | while ((r = cg_read_subgroup(d, &name)) > 0) { | |
427 | User *user; | |
14c3baca LP |
428 | int k; |
429 | ||
430 | k = manager_add_user_by_name(m, name, &user); | |
431 | if (k < 0) { | |
432 | free(name); | |
433 | r = k; | |
434 | continue; | |
435 | } | |
436 | ||
437 | user_add_to_gc_queue(user); | |
438 | ||
439 | if (!user->cgroup_path) | |
440 | if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) { | |
441 | r = -ENOMEM; | |
442 | free(name); | |
443 | break; | |
444 | } | |
20263082 | 445 | |
20263082 | 446 | free(name); |
14c3baca LP |
447 | } |
448 | ||
449 | closedir(d); | |
450 | ||
451 | return r; | |
452 | } | |
20263082 | 453 | |
14c3baca LP |
454 | static int manager_enumerate_linger_users(Manager *m) { |
455 | DIR *d; | |
456 | struct dirent *de; | |
457 | int r = 0; | |
458 | ||
459 | d = opendir("/var/lib/systemd/linger"); | |
460 | if (!d) { | |
461 | if (errno == ENOENT) | |
462 | return 0; | |
463 | ||
464 | log_error("Failed to open /var/lib/systemd/linger/: %m"); | |
465 | return -errno; | |
466 | } | |
467 | ||
468 | while ((de = readdir(d))) { | |
469 | int k; | |
470 | ||
471 | if (!dirent_is_file(de)) | |
20263082 LP |
472 | continue; |
473 | ||
14c3baca LP |
474 | k = manager_add_user_by_name(m, de->d_name, NULL); |
475 | if (k < 0) { | |
476 | log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k)); | |
477 | r = k; | |
20263082 LP |
478 | } |
479 | } | |
480 | ||
14c3baca | 481 | closedir(d); |
20263082 LP |
482 | |
483 | return r; | |
484 | } | |
485 | ||
486 | int manager_enumerate_users(Manager *m) { | |
487 | DIR *d; | |
488 | struct dirent *de; | |
14c3baca | 489 | int r, k; |
20263082 LP |
490 | |
491 | assert(m); | |
492 | ||
14c3baca | 493 | /* First, enumerate user cgroups */ |
20263082 LP |
494 | r = manager_enumerate_users_from_cgroup(m); |
495 | ||
14c3baca LP |
496 | /* Second, add lingering users on top */ |
497 | k = manager_enumerate_linger_users(m); | |
498 | if (k < 0) | |
499 | r = k; | |
500 | ||
501 | /* Third, read in user data stored on disk */ | |
20263082 LP |
502 | d = opendir("/run/systemd/users"); |
503 | if (!d) { | |
504 | if (errno == ENOENT) | |
505 | return 0; | |
506 | ||
507 | log_error("Failed to open /run/systemd/users: %m"); | |
508 | return -errno; | |
509 | } | |
510 | ||
511 | while ((de = readdir(d))) { | |
512 | unsigned long ul; | |
513 | User *u; | |
20263082 LP |
514 | |
515 | if (!dirent_is_file(de)) | |
516 | continue; | |
517 | ||
518 | k = safe_atolu(de->d_name, &ul); | |
519 | if (k < 0) { | |
520 | log_error("Failed to parse file name %s: %s", de->d_name, strerror(-k)); | |
521 | continue; | |
522 | } | |
523 | ||
524 | u = hashmap_get(m->users, ULONG_TO_PTR(ul)); | |
525 | if (!u) { | |
526 | unlinkat(dirfd(d), de->d_name, 0); | |
527 | continue; | |
528 | } | |
529 | ||
530 | k = user_load(u); | |
531 | if (k < 0) | |
532 | r = k; | |
533 | } | |
534 | ||
535 | closedir(d); | |
536 | ||
537 | return r; | |
538 | } | |
539 | ||
540 | static int manager_enumerate_sessions_from_cgroup(Manager *m) { | |
541 | User *u; | |
542 | Iterator i; | |
543 | int r = 0; | |
544 | ||
545 | HASHMAP_FOREACH(u, m->users, i) { | |
546 | DIR *d; | |
547 | char *name; | |
548 | int k; | |
549 | ||
14c3baca LP |
550 | if (!u->cgroup_path) |
551 | continue; | |
552 | ||
20263082 LP |
553 | k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d); |
554 | if (k < 0) { | |
555 | if (k == -ENOENT) | |
556 | continue; | |
557 | ||
558 | log_error("Failed to open %s: %s", u->cgroup_path, strerror(-k)); | |
559 | r = k; | |
560 | continue; | |
561 | } | |
562 | ||
563 | while ((k = cg_read_subgroup(d, &name)) > 0) { | |
564 | Session *session; | |
565 | ||
11896841 LP |
566 | if (streq(name, "shared")) |
567 | continue; | |
568 | ||
20263082 | 569 | k = manager_add_session(m, u, name, &session); |
14c3baca LP |
570 | if (k < 0) { |
571 | free(name); | |
20263082 | 572 | break; |
14c3baca | 573 | } |
20263082 | 574 | |
14c3baca | 575 | session_add_to_gc_queue(session); |
20263082 | 576 | |
14c3baca LP |
577 | if (!session->cgroup_path) |
578 | if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) { | |
579 | k = -ENOMEM; | |
580 | free(name); | |
581 | break; | |
582 | } | |
583 | ||
584 | free(name); | |
20263082 LP |
585 | } |
586 | ||
587 | closedir(d); | |
588 | ||
589 | if (k < 0) | |
590 | r = k; | |
591 | } | |
592 | ||
593 | return r; | |
594 | } | |
595 | ||
596 | int manager_enumerate_sessions(Manager *m) { | |
597 | DIR *d; | |
598 | struct dirent *de; | |
599 | int r = 0; | |
600 | ||
601 | assert(m); | |
602 | ||
14c3baca | 603 | /* First enumerate session cgroups */ |
20263082 LP |
604 | r = manager_enumerate_sessions_from_cgroup(m); |
605 | ||
14c3baca | 606 | /* Second, read in session data stored on disk */ |
20263082 LP |
607 | d = opendir("/run/systemd/sessions"); |
608 | if (!d) { | |
609 | if (errno == ENOENT) | |
610 | return 0; | |
611 | ||
612 | log_error("Failed to open /run/systemd/sessions: %m"); | |
613 | return -errno; | |
614 | } | |
615 | ||
616 | while ((de = readdir(d))) { | |
617 | struct Session *s; | |
618 | int k; | |
619 | ||
620 | if (!dirent_is_file(de)) | |
621 | continue; | |
622 | ||
623 | s = hashmap_get(m->sessions, de->d_name); | |
624 | if (!s) { | |
625 | unlinkat(dirfd(d), de->d_name, 0); | |
626 | continue; | |
627 | } | |
628 | ||
629 | k = session_load(s); | |
630 | if (k < 0) | |
631 | r = k; | |
632 | } | |
633 | ||
634 | closedir(d); | |
635 | ||
636 | return r; | |
637 | } | |
638 | ||
30ed21ce | 639 | int manager_dispatch_seat_udev(Manager *m) { |
20263082 LP |
640 | struct udev_device *d; |
641 | int r; | |
642 | ||
643 | assert(m); | |
644 | ||
30ed21ce | 645 | d = udev_monitor_receive_device(m->udev_seat_monitor); |
20263082 LP |
646 | if (!d) |
647 | return -ENOMEM; | |
648 | ||
30ed21ce LP |
649 | r = manager_process_seat_device(m, d); |
650 | udev_device_unref(d); | |
651 | ||
652 | return r; | |
653 | } | |
654 | ||
655 | ||
656 | int manager_dispatch_vcsa_udev(Manager *m) { | |
657 | struct udev_device *d; | |
658 | int r = 0; | |
659 | const char *name; | |
660 | ||
661 | assert(m); | |
662 | ||
663 | d = udev_monitor_receive_device(m->udev_vcsa_monitor); | |
664 | if (!d) | |
665 | return -ENOMEM; | |
666 | ||
667 | name = udev_device_get_sysname(d); | |
668 | ||
669 | /* Whenever a VCSA device is removed try to reallocate our | |
670 | * VTs, to make sure our auto VTs never go away. */ | |
671 | ||
672 | if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove")) | |
673 | r = seat_preallocate_vts(m->vtconsole); | |
674 | ||
20263082 LP |
675 | udev_device_unref(d); |
676 | ||
677 | return r; | |
678 | } | |
679 | ||
680 | int manager_dispatch_console(Manager *m) { | |
20263082 LP |
681 | assert(m); |
682 | ||
20263082 | 683 | if (m->vtconsole) |
14c3baca | 684 | seat_read_active_vt(m->vtconsole); |
20263082 LP |
685 | |
686 | return 0; | |
687 | } | |
688 | ||
5eda94dd LP |
689 | static int vt_is_busy(int vtnr) { |
690 | struct vt_stat vt_stat; | |
691 | int r = 0, fd; | |
692 | ||
693 | assert(vtnr >= 1); | |
694 | ||
d0a522eb LP |
695 | /* We explicitly open /dev/tty1 here instead of /dev/tty0. If |
696 | * we'd open the latter we'd open the foreground tty which | |
697 | * hence would be unconditionally busy. By opening /dev/tty1 | |
698 | * we avoid this. Since tty1 is special and needs to be an | |
699 | * explicitly loaded getty or DM this is safe. */ | |
700 | ||
701 | fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC); | |
5eda94dd LP |
702 | if (fd < 0) |
703 | return -errno; | |
704 | ||
705 | if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0) | |
706 | r = -errno; | |
707 | else | |
708 | r = !!(vt_stat.v_state & (1 << vtnr)); | |
709 | ||
710 | close_nointr_nofail(fd); | |
711 | ||
712 | return r; | |
713 | } | |
714 | ||
20263082 | 715 | int manager_spawn_autovt(Manager *m, int vtnr) { |
5eda94dd | 716 | int r; |
d0a522eb LP |
717 | DBusMessage *message = NULL, *reply = NULL; |
718 | char *name = NULL; | |
719 | const char *mode = "fail"; | |
720 | DBusError error; | |
5eda94dd | 721 | |
20263082 | 722 | assert(m); |
30ed21ce | 723 | assert(vtnr >= 1); |
20263082 | 724 | |
d0a522eb LP |
725 | dbus_error_init(&error); |
726 | ||
30ed21ce | 727 | if ((unsigned) vtnr > m->n_autovts) |
975fd867 LP |
728 | return 0; |
729 | ||
5eda94dd | 730 | r = vt_is_busy(vtnr); |
975fd867 | 731 | if (r < 0) |
5eda94dd | 732 | return r; |
975fd867 LP |
733 | else if (r > 0) |
734 | return -EBUSY; | |
5eda94dd | 735 | |
d0a522eb LP |
736 | message = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"); |
737 | if (!message) { | |
738 | log_error("Could not allocate message."); | |
739 | r = -ENOMEM; | |
740 | goto finish; | |
741 | } | |
5eda94dd | 742 | |
cd9e5d0a | 743 | if (asprintf(&name, "autovt@tty%i.service", vtnr) < 0) { |
d0a522eb LP |
744 | log_error("Could not allocate service name."); |
745 | r = -ENOMEM; | |
746 | goto finish; | |
747 | } | |
748 | ||
749 | if (!dbus_message_append_args(message, | |
750 | DBUS_TYPE_STRING, &name, | |
751 | DBUS_TYPE_STRING, &mode, | |
752 | DBUS_TYPE_INVALID)) { | |
753 | log_error("Could not attach target and flag information to message."); | |
754 | r = -ENOMEM; | |
755 | goto finish; | |
756 | } | |
757 | ||
758 | reply = dbus_connection_send_with_reply_and_block(m->bus, message, -1, &error); | |
759 | if (!reply) { | |
760 | log_error("Failed to start unit: %s", bus_error_message(&error)); | |
761 | goto finish; | |
762 | } | |
763 | ||
764 | r = 0; | |
765 | ||
766 | finish: | |
767 | free(name); | |
768 | ||
769 | if (message) | |
770 | dbus_message_unref(message); | |
771 | ||
772 | if (reply) | |
773 | dbus_message_unref(reply); | |
774 | ||
775 | dbus_error_free(&error); | |
776 | ||
777 | return r; | |
20263082 LP |
778 | } |
779 | ||
1713813d LP |
780 | void manager_cgroup_notify_empty(Manager *m, const char *cgroup) { |
781 | Session *s; | |
782 | char *p; | |
783 | ||
784 | assert(m); | |
785 | assert(cgroup); | |
786 | ||
787 | p = strdup(cgroup); | |
788 | if (!p) { | |
789 | log_error("Out of memory."); | |
790 | return; | |
791 | } | |
792 | ||
793 | for (;;) { | |
794 | char *e; | |
20263082 | 795 | |
1713813d LP |
796 | if (isempty(p) || streq(p, "/")) |
797 | break; | |
798 | ||
799 | s = hashmap_get(m->cgroups, p); | |
800 | if (s) | |
801 | session_add_to_gc_queue(s); | |
802 | ||
803 | assert_se(e = strrchr(p, '/')); | |
804 | *e = 0; | |
805 | } | |
806 | ||
807 | free(p); | |
20263082 LP |
808 | } |
809 | ||
31b79c2b LP |
810 | static void manager_pipe_notify_eof(Manager *m, int fd) { |
811 | Session *s; | |
812 | ||
813 | assert_se(m); | |
814 | assert_se(fd >= 0); | |
815 | ||
932e3ee7 LP |
816 | assert_se(s = hashmap_get(m->fifo_fds, INT_TO_PTR(fd + 1))); |
817 | assert(s->fifo_fd == fd); | |
818 | session_remove_fifo(s); | |
31b79c2b | 819 | |
21308c65 | 820 | session_stop(s); |
31b79c2b LP |
821 | } |
822 | ||
20263082 | 823 | static int manager_connect_bus(Manager *m) { |
20263082 LP |
824 | DBusError error; |
825 | int r; | |
826 | struct epoll_event ev; | |
827 | ||
828 | assert(m); | |
829 | assert(!m->bus); | |
830 | assert(m->bus_fd < 0); | |
831 | ||
832 | dbus_error_init(&error); | |
833 | ||
834 | m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error); | |
835 | if (!m->bus) { | |
a2e52832 | 836 | log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error)); |
20263082 LP |
837 | r = -ECONNREFUSED; |
838 | goto fail; | |
839 | } | |
840 | ||
3f49d45a LP |
841 | if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) || |
842 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) || | |
843 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) || | |
844 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) || | |
1713813d | 845 | !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) { |
20263082 LP |
846 | log_error("Not enough memory"); |
847 | r = -ENOMEM; | |
848 | goto fail; | |
849 | } | |
850 | ||
851 | dbus_bus_add_match(m->bus, | |
852 | "type='signal'," | |
853 | "interface='org.freedesktop.systemd1.Agent'," | |
854 | "member='Released'," | |
855 | "path='/org/freedesktop/systemd1/agent'", | |
856 | &error); | |
857 | ||
858 | if (dbus_error_is_set(&error)) { | |
a2e52832 | 859 | log_error("Failed to register match: %s", bus_error_message(&error)); |
20263082 LP |
860 | r = -EIO; |
861 | goto fail; | |
862 | } | |
863 | ||
bafd4449 LP |
864 | r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error); |
865 | if (dbus_error_is_set(&error)) { | |
866 | log_error("Failed to register name on bus: %s", bus_error_message(&error)); | |
867 | r = -EIO; | |
868 | goto fail; | |
869 | } | |
870 | ||
871 | if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { | |
872 | log_error("Failed to acquire name."); | |
20263082 LP |
873 | r = -EEXIST; |
874 | goto fail; | |
875 | } | |
876 | ||
877 | m->bus_fd = bus_loop_open(m->bus); | |
878 | if (m->bus_fd < 0) { | |
879 | r = m->bus_fd; | |
880 | goto fail; | |
881 | } | |
882 | ||
883 | zero(ev); | |
884 | ev.events = EPOLLIN; | |
885 | ev.data.u32 = FD_BUS; | |
886 | ||
887 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0) | |
888 | goto fail; | |
889 | ||
890 | return 0; | |
891 | ||
892 | fail: | |
893 | dbus_error_free(&error); | |
894 | ||
895 | return r; | |
896 | } | |
897 | ||
898 | static int manager_connect_console(Manager *m) { | |
899 | struct epoll_event ev; | |
900 | ||
901 | assert(m); | |
902 | assert(m->console_active_fd < 0); | |
903 | ||
904 | m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
905 | if (m->console_active_fd < 0) { | |
906 | log_error("Failed to open /sys/class/tty/tty0/active: %m"); | |
907 | return -errno; | |
908 | } | |
909 | ||
910 | zero(ev); | |
14c3baca | 911 | ev.events = 0; |
20263082 LP |
912 | ev.data.u32 = FD_CONSOLE; |
913 | ||
914 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0) | |
915 | return -errno; | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
920 | static int manager_connect_udev(Manager *m) { | |
921 | struct epoll_event ev; | |
14c3baca | 922 | int r; |
20263082 LP |
923 | |
924 | assert(m); | |
30ed21ce LP |
925 | assert(!m->udev_seat_monitor); |
926 | assert(!m->udev_vcsa_monitor); | |
20263082 | 927 | |
30ed21ce LP |
928 | m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); |
929 | if (!m->udev_seat_monitor) | |
20263082 LP |
930 | return -ENOMEM; |
931 | ||
30ed21ce | 932 | r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "seat"); |
14c3baca LP |
933 | if (r < 0) |
934 | return r; | |
20263082 | 935 | |
30ed21ce | 936 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_seat_monitor, "graphics", NULL); |
14c3baca LP |
937 | if (r < 0) |
938 | return r; | |
20263082 | 939 | |
30ed21ce | 940 | r = udev_monitor_enable_receiving(m->udev_seat_monitor); |
14c3baca LP |
941 | if (r < 0) |
942 | return r; | |
20263082 | 943 | |
30ed21ce | 944 | m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor); |
20263082 LP |
945 | |
946 | zero(ev); | |
947 | ev.events = EPOLLIN; | |
30ed21ce | 948 | ev.data.u32 = FD_SEAT_UDEV; |
20263082 | 949 | |
30ed21ce LP |
950 | if (m->n_autovts <= 0) |
951 | return 0; | |
952 | ||
953 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0) | |
954 | return -errno; | |
955 | ||
956 | m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); | |
957 | if (!m->udev_vcsa_monitor) | |
958 | return -ENOMEM; | |
959 | ||
960 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL); | |
961 | if (r < 0) | |
962 | return r; | |
963 | ||
964 | r = udev_monitor_enable_receiving(m->udev_vcsa_monitor); | |
965 | if (r < 0) | |
966 | return r; | |
967 | ||
968 | m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor); | |
969 | ||
970 | zero(ev); | |
971 | ev.events = EPOLLIN; | |
972 | ev.data.u32 = FD_VCSA_UDEV; | |
973 | ||
974 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0) | |
20263082 LP |
975 | return -errno; |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
4a4b033f | 980 | void manager_gc(Manager *m, bool drop_not_started) { |
14c3baca LP |
981 | Seat *seat; |
982 | Session *session; | |
983 | User *user; | |
984 | ||
985 | assert(m); | |
986 | ||
987 | while ((seat = m->seat_gc_queue)) { | |
988 | LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat); | |
989 | seat->in_gc_queue = false; | |
990 | ||
4a4b033f | 991 | if (seat_check_gc(seat, drop_not_started) == 0) { |
14c3baca LP |
992 | seat_stop(seat); |
993 | seat_free(seat); | |
994 | } | |
995 | } | |
996 | ||
997 | while ((session = m->session_gc_queue)) { | |
998 | LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session); | |
999 | session->in_gc_queue = false; | |
1000 | ||
4a4b033f | 1001 | if (session_check_gc(session, drop_not_started) == 0) { |
14c3baca LP |
1002 | session_stop(session); |
1003 | session_free(session); | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | while ((user = m->user_gc_queue)) { | |
1008 | LIST_REMOVE(User, gc_queue, m->user_gc_queue, user); | |
1009 | user->in_gc_queue = false; | |
1010 | ||
4a4b033f | 1011 | if (user_check_gc(user, drop_not_started) == 0) { |
14c3baca LP |
1012 | user_stop(user); |
1013 | user_free(user); | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
a185c5aa LP |
1018 | int manager_get_idle_hint(Manager *m, dual_timestamp *t) { |
1019 | Session *s; | |
1020 | bool idle_hint = true; | |
1021 | dual_timestamp ts = { 0, 0 }; | |
1022 | Iterator i; | |
1023 | ||
1024 | assert(m); | |
1025 | ||
1026 | HASHMAP_FOREACH(s, m->sessions, i) { | |
1027 | dual_timestamp k; | |
1028 | int ih; | |
1029 | ||
1030 | ih = session_get_idle_hint(s, &k); | |
1031 | if (ih < 0) | |
1032 | return ih; | |
1033 | ||
1034 | if (!ih) { | |
1035 | if (!idle_hint) { | |
1036 | if (k.monotonic < ts.monotonic) | |
1037 | ts = k; | |
1038 | } else { | |
1039 | idle_hint = false; | |
1040 | ts = k; | |
1041 | } | |
1042 | } else if (idle_hint) { | |
1043 | ||
1044 | if (k.monotonic > ts.monotonic) | |
1045 | ts = k; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | if (t) | |
1050 | *t = ts; | |
1051 | ||
1052 | return idle_hint; | |
1053 | } | |
1054 | ||
20263082 LP |
1055 | int manager_startup(Manager *m) { |
1056 | int r; | |
14c3baca LP |
1057 | Seat *seat; |
1058 | Session *session; | |
1059 | User *user; | |
1060 | Iterator i; | |
20263082 LP |
1061 | |
1062 | assert(m); | |
1063 | assert(m->epoll_fd <= 0); | |
1064 | ||
1065 | m->epoll_fd = epoll_create1(EPOLL_CLOEXEC); | |
1066 | if (m->epoll_fd < 0) | |
1067 | return -errno; | |
1068 | ||
1069 | /* Connect to udev */ | |
1070 | r = manager_connect_udev(m); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | /* Connect to console */ | |
1075 | r = manager_connect_console(m); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | /* Connect to the bus */ | |
1080 | r = manager_connect_bus(m); | |
1081 | if (r < 0) | |
1082 | return r; | |
1083 | ||
14c3baca LP |
1084 | /* Instantiate magic seat 0 */ |
1085 | r = manager_add_seat(m, "seat0", &m->vtconsole); | |
1086 | if (r < 0) | |
1087 | return r; | |
1088 | ||
20263082 LP |
1089 | /* Deserialize state */ |
1090 | manager_enumerate_devices(m); | |
1091 | manager_enumerate_seats(m); | |
1092 | manager_enumerate_users(m); | |
1093 | manager_enumerate_sessions(m); | |
1094 | ||
4a4b033f LP |
1095 | /* Remove stale objects before we start them */ |
1096 | manager_gc(m, false); | |
1097 | ||
14c3baca LP |
1098 | /* And start everything */ |
1099 | HASHMAP_FOREACH(seat, m->seats, i) | |
1100 | seat_start(seat); | |
1101 | ||
1102 | HASHMAP_FOREACH(user, m->users, i) | |
1103 | user_start(user); | |
1104 | ||
1105 | HASHMAP_FOREACH(session, m->sessions, i) | |
1106 | session_start(session); | |
20263082 LP |
1107 | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | int manager_run(Manager *m) { | |
1112 | assert(m); | |
1113 | ||
1114 | for (;;) { | |
1115 | struct epoll_event event; | |
1116 | int n; | |
1117 | ||
4a4b033f | 1118 | manager_gc(m, true); |
14c3baca | 1119 | |
20263082 LP |
1120 | if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE) |
1121 | continue; | |
1122 | ||
4a4b033f | 1123 | manager_gc(m, true); |
1713813d | 1124 | |
20263082 LP |
1125 | n = epoll_wait(m->epoll_fd, &event, 1, -1); |
1126 | if (n < 0) { | |
3f49d45a LP |
1127 | if (errno == EINTR || errno == EAGAIN) |
1128 | continue; | |
1129 | ||
20263082 LP |
1130 | log_error("epoll() failed: %m"); |
1131 | return -errno; | |
1132 | } | |
1133 | ||
1134 | switch (event.data.u32) { | |
1135 | ||
30ed21ce LP |
1136 | case FD_SEAT_UDEV: |
1137 | manager_dispatch_seat_udev(m); | |
1138 | break; | |
1139 | ||
1140 | case FD_VCSA_UDEV: | |
1141 | manager_dispatch_vcsa_udev(m); | |
20263082 LP |
1142 | break; |
1143 | ||
1144 | case FD_CONSOLE: | |
1145 | manager_dispatch_console(m); | |
1146 | break; | |
1147 | ||
1148 | case FD_BUS: | |
1149 | bus_loop_dispatch(m->bus_fd); | |
1150 | break; | |
31b79c2b LP |
1151 | |
1152 | default: | |
932e3ee7 LP |
1153 | if (event.data.u32 >= FD_FIFO_BASE) |
1154 | manager_pipe_notify_eof(m, event.data.u32 - FD_FIFO_BASE); | |
20263082 LP |
1155 | } |
1156 | } | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
193197e8 LP |
1161 | static int manager_parse_config_file(Manager *m) { |
1162 | ||
1163 | const ConfigItem items[] = { | |
1164 | { "NAutoVTs", config_parse_unsigned, 0, &m->n_autovts, "Login" }, | |
1165 | { "KillUserProcesses", config_parse_bool, 0, &m->kill_user_processes, "Login" }, | |
4fa4c2ac | 1166 | { "KillOnlyUsers", config_parse_strv, 0, &m->kill_only_users, "Login" }, |
193197e8 LP |
1167 | { "KillExcludeUsers", config_parse_strv, 0, &m->kill_exclude_users, "Login" }, |
1168 | { "Controllers", config_parse_strv, 0, &m->controllers, "Login" }, | |
1169 | { "ResetControllers", config_parse_strv, 0, &m->reset_controllers, "Login" }, | |
1170 | { NULL, NULL, 0, NULL, NULL } | |
1171 | }; | |
1172 | ||
1173 | static const char * const sections[] = { | |
1174 | "Login", | |
1175 | NULL | |
1176 | }; | |
1177 | ||
1178 | FILE *f; | |
1179 | const char *fn; | |
1180 | int r; | |
1181 | ||
1182 | assert(m); | |
1183 | ||
1184 | fn = "/etc/systemd/systemd-logind.conf"; | |
1185 | f = fopen(fn, "re"); | |
1186 | if (!f) { | |
1187 | if (errno == ENOENT) | |
1188 | return 0; | |
1189 | ||
1190 | log_warning("Failed to open configuration file %s: %m", fn); | |
1191 | return -errno; | |
1192 | } | |
1193 | ||
1194 | r = config_parse(fn, f, sections, items, false, NULL); | |
1195 | if (r < 0) | |
1196 | log_warning("Failed to parse configuration file: %s", strerror(-r)); | |
1197 | ||
1198 | fclose(f); | |
1199 | ||
1200 | return r; | |
1201 | } | |
1202 | ||
20263082 LP |
1203 | int main(int argc, char *argv[]) { |
1204 | Manager *m = NULL; | |
5eda94dd | 1205 | int r; |
20263082 LP |
1206 | |
1207 | log_set_target(LOG_TARGET_AUTO); | |
1208 | log_parse_environment(); | |
1209 | log_open(); | |
1210 | ||
1211 | if (argc != 1) { | |
1212 | log_error("This program takes no arguments."); | |
1213 | r = -EINVAL; | |
1214 | goto finish; | |
1215 | } | |
1216 | ||
1217 | umask(0022); | |
1218 | ||
1219 | m = manager_new(); | |
1220 | if (!m) { | |
1221 | log_error("Out of memory"); | |
1222 | r = -ENOMEM; | |
1223 | goto finish; | |
1224 | } | |
1225 | ||
193197e8 LP |
1226 | manager_parse_config_file(m); |
1227 | ||
20263082 LP |
1228 | r = manager_startup(m); |
1229 | if (r < 0) { | |
1230 | log_error("Failed to fully start up daemon: %s", strerror(-r)); | |
1231 | goto finish; | |
1232 | } | |
1233 | ||
1234 | r = manager_run(m); | |
1235 | ||
1236 | finish: | |
1237 | if (m) | |
1238 | manager_free(m); | |
1239 | ||
1240 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1241 | } |