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