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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 | ||
2b3ab29d ZJS |
22 | #include <fcntl.h> |
23 | #include <pwd.h> | |
cf0fbc49 TA |
24 | #include <sys/ioctl.h> |
25 | #include <sys/types.h> | |
2b3ab29d ZJS |
26 | #include <linux/vt.h> |
27 | ||
b5efdb8a | 28 | #include "alloc-util.h" |
cc377381 | 29 | #include "bus-error.h" |
3ffd4af2 LP |
30 | #include "bus-util.h" |
31 | #include "cgroup-util.h" | |
32 | #include "fd-util.h" | |
cc377381 | 33 | #include "logind.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); | |
274 | button_open(b); | |
275 | } | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { | |
281 | _cleanup_free_ char *unit = NULL; | |
282 | Session *s; | |
283 | int r; | |
284 | ||
285 | assert(m); | |
2b3ab29d ZJS |
286 | |
287 | if (pid < 1) | |
288 | return -EINVAL; | |
289 | ||
290 | r = cg_pid_get_unit(pid, &unit); | |
291 | if (r < 0) | |
d3e84ddb | 292 | return 0; |
2b3ab29d ZJS |
293 | |
294 | s = hashmap_get(m->session_units, unit); | |
295 | if (!s) | |
296 | return 0; | |
297 | ||
b80120c4 DH |
298 | if (session) |
299 | *session = s; | |
2b3ab29d ZJS |
300 | return 1; |
301 | } | |
302 | ||
303 | int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) { | |
304 | _cleanup_free_ char *unit = NULL; | |
305 | User *u; | |
306 | int r; | |
307 | ||
308 | assert(m); | |
309 | assert(user); | |
310 | ||
311 | if (pid < 1) | |
312 | return -EINVAL; | |
313 | ||
314 | r = cg_pid_get_slice(pid, &unit); | |
315 | if (r < 0) | |
d3e84ddb | 316 | return 0; |
2b3ab29d ZJS |
317 | |
318 | u = hashmap_get(m->user_units, unit); | |
319 | if (!u) | |
320 | return 0; | |
321 | ||
322 | *user = u; | |
323 | return 1; | |
324 | } | |
325 | ||
326 | int manager_get_idle_hint(Manager *m, dual_timestamp *t) { | |
327 | Session *s; | |
328 | bool idle_hint; | |
5cb14b37 | 329 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
2b3ab29d ZJS |
330 | Iterator i; |
331 | ||
332 | assert(m); | |
333 | ||
85a428c6 | 334 | idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL); |
2b3ab29d ZJS |
335 | |
336 | HASHMAP_FOREACH(s, m->sessions, i) { | |
337 | dual_timestamp k; | |
338 | int ih; | |
339 | ||
340 | ih = session_get_idle_hint(s, &k); | |
341 | if (ih < 0) | |
342 | return ih; | |
343 | ||
344 | if (!ih) { | |
345 | if (!idle_hint) { | |
346 | if (k.monotonic < ts.monotonic) | |
347 | ts = k; | |
348 | } else { | |
349 | idle_hint = false; | |
350 | ts = k; | |
351 | } | |
352 | } else if (idle_hint) { | |
353 | ||
354 | if (k.monotonic > ts.monotonic) | |
355 | ts = k; | |
356 | } | |
357 | } | |
358 | ||
359 | if (t) | |
360 | *t = ts; | |
361 | ||
362 | return idle_hint; | |
363 | } | |
364 | ||
365 | bool manager_shall_kill(Manager *m, const char *user) { | |
366 | assert(m); | |
367 | assert(user); | |
368 | ||
369 | if (!m->kill_user_processes) | |
370 | return false; | |
371 | ||
372 | if (strv_contains(m->kill_exclude_users, user)) | |
373 | return false; | |
374 | ||
375 | if (strv_isempty(m->kill_only_users)) | |
376 | return true; | |
377 | ||
378 | return strv_contains(m->kill_only_users, user); | |
379 | } | |
380 | ||
92bd5ff3 | 381 | static int vt_is_busy(unsigned int vtnr) { |
2b3ab29d | 382 | struct vt_stat vt_stat; |
61376f96 ZJS |
383 | int r = 0; |
384 | _cleanup_close_ int fd; | |
2b3ab29d ZJS |
385 | |
386 | assert(vtnr >= 1); | |
387 | ||
388 | /* We explicitly open /dev/tty1 here instead of /dev/tty0. If | |
389 | * we'd open the latter we'd open the foreground tty which | |
390 | * hence would be unconditionally busy. By opening /dev/tty1 | |
391 | * we avoid this. Since tty1 is special and needs to be an | |
392 | * explicitly loaded getty or DM this is safe. */ | |
393 | ||
394 | fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC); | |
395 | if (fd < 0) | |
396 | return -errno; | |
397 | ||
398 | if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0) | |
399 | r = -errno; | |
400 | else | |
401 | r = !!(vt_stat.v_state & (1 << vtnr)); | |
402 | ||
2b3ab29d ZJS |
403 | return r; |
404 | } | |
405 | ||
92bd5ff3 | 406 | int manager_spawn_autovt(Manager *m, unsigned int vtnr) { |
4afd3348 | 407 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
61376f96 | 408 | char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)]; |
2b3ab29d | 409 | int r; |
2b3ab29d ZJS |
410 | |
411 | assert(m); | |
412 | assert(vtnr >= 1); | |
413 | ||
92bd5ff3 DH |
414 | if (vtnr > m->n_autovts && |
415 | vtnr != m->reserve_vt) | |
2b3ab29d ZJS |
416 | return 0; |
417 | ||
92bd5ff3 | 418 | if (vtnr != m->reserve_vt) { |
2b3ab29d ZJS |
419 | /* If this is the reserved TTY, we'll start the getty |
420 | * on it in any case, but otherwise only if it is not | |
421 | * busy. */ | |
422 | ||
423 | r = vt_is_busy(vtnr); | |
424 | if (r < 0) | |
425 | return r; | |
426 | else if (r > 0) | |
427 | return -EBUSY; | |
428 | } | |
429 | ||
61376f96 | 430 | snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr); |
cc377381 | 431 | r = sd_bus_call_method( |
2b3ab29d ZJS |
432 | m->bus, |
433 | "org.freedesktop.systemd1", | |
434 | "/org/freedesktop/systemd1", | |
435 | "org.freedesktop.systemd1.Manager", | |
436 | "StartUnit", | |
cc377381 | 437 | &error, |
2b3ab29d | 438 | NULL, |
cc377381 LP |
439 | "ss", name, "fail"); |
440 | if (r < 0) | |
441 | log_error("Failed to start %s: %s", name, bus_error_message(&error, r)); | |
2b3ab29d ZJS |
442 | |
443 | return r; | |
444 | } | |
2d62c530 | 445 | |
602a41c2 | 446 | static bool manager_is_docked(Manager *m) { |
2d62c530 LP |
447 | Iterator i; |
448 | Button *b; | |
449 | ||
450 | HASHMAP_FOREACH(b, m->buttons, i) | |
451 | if (b->docked) | |
452 | return true; | |
453 | ||
454 | return false; | |
455 | } | |
6a79c586 | 456 | |
602a41c2 | 457 | static int manager_count_external_displays(Manager *m) { |
6a79c586 LP |
458 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
459 | struct udev_list_entry *item = NULL, *first = NULL; | |
460 | int r; | |
461 | int n = 0; | |
462 | ||
463 | e = udev_enumerate_new(m->udev); | |
464 | if (!e) | |
465 | return -ENOMEM; | |
466 | ||
467 | r = udev_enumerate_add_match_subsystem(e, "drm"); | |
468 | if (r < 0) | |
469 | return r; | |
470 | ||
471 | r = udev_enumerate_scan_devices(e); | |
472 | if (r < 0) | |
473 | return r; | |
474 | ||
475 | first = udev_enumerate_get_list_entry(e); | |
476 | udev_list_entry_foreach(item, first) { | |
477 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
478 | struct udev_device *p; | |
602a41c2 LP |
479 | const char *status, *enabled, *dash, *nn, *i; |
480 | bool external = false; | |
6a79c586 LP |
481 | |
482 | d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); | |
483 | if (!d) | |
484 | return -ENOMEM; | |
485 | ||
486 | p = udev_device_get_parent(d); | |
487 | if (!p) | |
94036de8 | 488 | continue; |
6a79c586 LP |
489 | |
490 | /* If the parent shares the same subsystem as the | |
491 | * device we are looking at then it is a connector, | |
492 | * which is what we are interested in. */ | |
493 | if (!streq_ptr(udev_device_get_subsystem(p), "drm")) | |
494 | continue; | |
495 | ||
602a41c2 LP |
496 | nn = udev_device_get_sysname(d); |
497 | if (!nn) | |
498 | continue; | |
499 | ||
500 | /* Ignore internal displays: the type is encoded in | |
501 | * the sysfs name, as the second dash seperated item | |
502 | * (the first is the card name, the last the connector | |
503 | * number). We implement a whitelist of external | |
504 | * displays here, rather than a whitelist, to ensure | |
505 | * we don't block suspends too eagerly. */ | |
506 | dash = strchr(nn, '-'); | |
507 | if (!dash) | |
508 | continue; | |
509 | ||
510 | dash++; | |
511 | FOREACH_STRING(i, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-" | |
512 | "Composite-", "SVIDEO-", "Component-", | |
513 | "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") { | |
514 | ||
515 | if (startswith(dash, i)) { | |
516 | external = true; | |
517 | break; | |
518 | } | |
519 | } | |
520 | if (!external) | |
521 | continue; | |
522 | ||
523 | /* Ignore ports that are not enabled */ | |
524 | enabled = udev_device_get_sysattr_value(d, "enabled"); | |
525 | if (!enabled) | |
526 | continue; | |
527 | if (!streq_ptr(enabled, "enabled")) | |
528 | continue; | |
529 | ||
6a79c586 LP |
530 | /* We count any connector which is not explicitly |
531 | * "disconnected" as connected. */ | |
532 | status = udev_device_get_sysattr_value(d, "status"); | |
533 | if (!streq_ptr(status, "disconnected")) | |
534 | n++; | |
535 | } | |
536 | ||
537 | return n; | |
538 | } | |
3c56cab4 | 539 | |
602a41c2 | 540 | bool manager_is_docked_or_external_displays(Manager *m) { |
3c56cab4 BW |
541 | int n; |
542 | ||
543 | /* If we are docked don't react to lid closing */ | |
544 | if (manager_is_docked(m)) { | |
545 | log_debug("System is docked."); | |
546 | return true; | |
547 | } | |
548 | ||
549 | /* If we have more than one display connected, | |
550 | * assume that we are docked. */ | |
602a41c2 | 551 | n = manager_count_external_displays(m); |
3c56cab4 | 552 | if (n < 0) |
da927ba9 | 553 | log_warning_errno(n, "Display counting failed: %m"); |
602a41c2 LP |
554 | else if (n >= 1) { |
555 | log_debug("External (%i) displays connected.", n); | |
3c56cab4 BW |
556 | return true; |
557 | } | |
558 | ||
559 | return false; | |
560 | } |