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74b91131 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 | |
5430f7f2 LP |
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 | |
74b91131 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
74b91131 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
74b91131 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
74b91131 | 22 | #include <errno.h> |
0a6f50c0 | 23 | #include <poll.h> |
4f5dd394 LP |
24 | #include <string.h> |
25 | #include <sys/inotify.h> | |
26 | #include <unistd.h> | |
74b91131 | 27 | |
07630cea LP |
28 | #include "sd-login.h" |
29 | ||
74b91131 | 30 | #include "cgroup-util.h" |
4f5dd394 | 31 | #include "escape.h" |
a5c32cff | 32 | #include "fileio.h" |
6482f626 | 33 | #include "formats-util.h" |
25300b5a | 34 | #include "hostname-util.h" |
4f5dd394 LP |
35 | #include "login-util.h" |
36 | #include "macro.h" | |
07630cea | 37 | #include "string-util.h" |
4f5dd394 LP |
38 | #include "strv.h" |
39 | #include "util.h" | |
74b91131 | 40 | |
707b66c6 LP |
41 | /* Error codes: |
42 | * | |
43 | * invalid input parameters → -EINVAL | |
44 | * invalid fd → -EBADF | |
45 | * process does not exist → -ESRCH | |
46 | * cgroup does not exist → -ENOENT | |
47 | * machine, session does not exist → -ENXIO | |
48 | * requested metadata on object is missing → -ENODATA | |
49 | */ | |
50 | ||
034a2a52 | 51 | _public_ int sd_pid_get_session(pid_t pid, char **session) { |
ba1261bc | 52 | |
1ae464e0 TA |
53 | assert_return(pid >= 0, -EINVAL); |
54 | assert_return(session, -EINVAL); | |
034a2a52 | 55 | |
7027ff61 | 56 | return cg_pid_get_session(pid, session); |
74b91131 LP |
57 | } |
58 | ||
94fb446e | 59 | _public_ int sd_pid_get_unit(pid_t pid, char **unit) { |
9847946e | 60 | |
1ae464e0 TA |
61 | assert_return(pid >= 0, -EINVAL); |
62 | assert_return(unit, -EINVAL); | |
9847946e | 63 | |
ba1261bc | 64 | return cg_pid_get_unit(pid, unit); |
9847946e LP |
65 | } |
66 | ||
97e13058 LP |
67 | _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { |
68 | ||
1ae464e0 TA |
69 | assert_return(pid >= 0, -EINVAL); |
70 | assert_return(unit, -EINVAL); | |
97e13058 LP |
71 | |
72 | return cg_pid_get_user_unit(pid, unit); | |
73 | } | |
74 | ||
7027ff61 LP |
75 | _public_ int sd_pid_get_machine_name(pid_t pid, char **name) { |
76 | ||
1ae464e0 TA |
77 | assert_return(pid >= 0, -EINVAL); |
78 | assert_return(name, -EINVAL); | |
7027ff61 LP |
79 | |
80 | return cg_pid_get_machine_name(pid, name); | |
81 | } | |
82 | ||
1021b21b LP |
83 | _public_ int sd_pid_get_slice(pid_t pid, char **slice) { |
84 | ||
1ae464e0 TA |
85 | assert_return(pid >= 0, -EINVAL); |
86 | assert_return(slice, -EINVAL); | |
1021b21b LP |
87 | |
88 | return cg_pid_get_slice(pid, slice); | |
89 | } | |
90 | ||
329ac4bc LP |
91 | _public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { |
92 | ||
93 | assert_return(pid >= 0, -EINVAL); | |
94 | assert_return(slice, -EINVAL); | |
95 | ||
96 | return cg_pid_get_user_slice(pid, slice); | |
97 | } | |
98 | ||
034a2a52 | 99 | _public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { |
034a2a52 | 100 | |
1ae464e0 TA |
101 | assert_return(pid >= 0, -EINVAL); |
102 | assert_return(uid, -EINVAL); | |
034a2a52 | 103 | |
ae018d9b | 104 | return cg_pid_get_owner_uid(pid, uid); |
034a2a52 LP |
105 | } |
106 | ||
f5aaf575 LP |
107 | _public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) { |
108 | char *c; | |
109 | int r; | |
110 | ||
111 | assert_return(pid >= 0, -EINVAL); | |
112 | assert_return(cgroup, -EINVAL); | |
113 | ||
114 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c); | |
115 | if (r < 0) | |
116 | return r; | |
117 | ||
118 | /* The internal APIs return the empty string for the root | |
119 | * cgroup, let's return the "/" in the public APIs instead, as | |
120 | * that's easier and less ambigious for people to grok. */ | |
121 | if (isempty(c)) { | |
122 | free(c); | |
123 | c = strdup("/"); | |
124 | if (!c) | |
125 | return -ENOMEM; | |
126 | ||
127 | } | |
128 | ||
129 | *cgroup = c; | |
130 | return 0; | |
131 | } | |
132 | ||
bf34ab14 | 133 | _public_ int sd_peer_get_session(int fd, char **session) { |
a7f7d1bd | 134 | struct ucred ucred = {}; |
bf34ab14 LP |
135 | int r; |
136 | ||
8ac43fee | 137 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
138 | assert_return(session, -EINVAL); |
139 | ||
140 | r = getpeercred(fd, &ucred); | |
141 | if (r < 0) | |
142 | return r; | |
143 | ||
144 | return cg_pid_get_session(ucred.pid, session); | |
145 | } | |
146 | ||
147 | _public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) { | |
148 | struct ucred ucred; | |
149 | int r; | |
150 | ||
8ac43fee | 151 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
152 | assert_return(uid, -EINVAL); |
153 | ||
154 | r = getpeercred(fd, &ucred); | |
155 | if (r < 0) | |
156 | return r; | |
157 | ||
158 | return cg_pid_get_owner_uid(ucred.pid, uid); | |
159 | } | |
160 | ||
161 | _public_ int sd_peer_get_unit(int fd, char **unit) { | |
162 | struct ucred ucred; | |
163 | int r; | |
164 | ||
8ac43fee | 165 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
166 | assert_return(unit, -EINVAL); |
167 | ||
168 | r = getpeercred(fd, &ucred); | |
169 | if (r < 0) | |
170 | return r; | |
171 | ||
172 | return cg_pid_get_unit(ucred.pid, unit); | |
173 | } | |
174 | ||
175 | _public_ int sd_peer_get_user_unit(int fd, char **unit) { | |
176 | struct ucred ucred; | |
177 | int r; | |
178 | ||
8ac43fee | 179 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
180 | assert_return(unit, -EINVAL); |
181 | ||
182 | r = getpeercred(fd, &ucred); | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | return cg_pid_get_user_unit(ucred.pid, unit); | |
187 | } | |
188 | ||
189 | _public_ int sd_peer_get_machine_name(int fd, char **machine) { | |
190 | struct ucred ucred; | |
191 | int r; | |
192 | ||
8ac43fee | 193 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
194 | assert_return(machine, -EINVAL); |
195 | ||
196 | r = getpeercred(fd, &ucred); | |
197 | if (r < 0) | |
198 | return r; | |
199 | ||
200 | return cg_pid_get_machine_name(ucred.pid, machine); | |
201 | } | |
202 | ||
203 | _public_ int sd_peer_get_slice(int fd, char **slice) { | |
204 | struct ucred ucred; | |
205 | int r; | |
206 | ||
8ac43fee | 207 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
208 | assert_return(slice, -EINVAL); |
209 | ||
210 | r = getpeercred(fd, &ucred); | |
211 | if (r < 0) | |
212 | return r; | |
213 | ||
214 | return cg_pid_get_slice(ucred.pid, slice); | |
215 | } | |
216 | ||
329ac4bc LP |
217 | _public_ int sd_peer_get_user_slice(int fd, char **slice) { |
218 | struct ucred ucred; | |
219 | int r; | |
220 | ||
8ac43fee | 221 | assert_return(fd >= 0, -EBADF); |
329ac4bc LP |
222 | assert_return(slice, -EINVAL); |
223 | ||
224 | r = getpeercred(fd, &ucred); | |
225 | if (r < 0) | |
226 | return r; | |
227 | ||
228 | return cg_pid_get_user_slice(ucred.pid, slice); | |
229 | } | |
230 | ||
f5aaf575 LP |
231 | _public_ int sd_peer_get_cgroup(int fd, char **cgroup) { |
232 | struct ucred ucred; | |
233 | int r; | |
234 | ||
235 | assert_return(fd >= 0, -EBADF); | |
236 | assert_return(cgroup, -EINVAL); | |
237 | ||
238 | r = getpeercred(fd, &ucred); | |
239 | if (r < 0) | |
240 | return r; | |
241 | ||
242 | return sd_pid_get_cgroup(ucred.pid, cgroup); | |
243 | } | |
244 | ||
a077b666 | 245 | static int file_of_uid(uid_t uid, char **p) { |
707b66c6 LP |
246 | |
247 | assert_return(uid_is_valid(uid), -EINVAL); | |
a077b666 LP |
248 | assert(p); |
249 | ||
250 | if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0) | |
251 | return -ENOMEM; | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
74b91131 | 256 | _public_ int sd_uid_get_state(uid_t uid, char**state) { |
bf34ab14 LP |
257 | _cleanup_free_ char *p = NULL; |
258 | char *s = NULL; | |
74b91131 LP |
259 | int r; |
260 | ||
1ae464e0 | 261 | assert_return(state, -EINVAL); |
74b91131 | 262 | |
a077b666 LP |
263 | r = file_of_uid(uid, &p); |
264 | if (r < 0) | |
265 | return r; | |
74b91131 LP |
266 | |
267 | r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); | |
74b91131 LP |
268 | if (r == -ENOENT) { |
269 | free(s); | |
270 | s = strdup("offline"); | |
271 | if (!s) | |
272 | return -ENOMEM; | |
273 | ||
707b66c6 LP |
274 | } |
275 | if (r < 0) { | |
74b91131 LP |
276 | free(s); |
277 | return r; | |
707b66c6 LP |
278 | } |
279 | if (isempty(s)) { | |
280 | free(s); | |
74b91131 | 281 | return -EIO; |
707b66c6 | 282 | } |
74b91131 LP |
283 | |
284 | *state = s; | |
285 | return 0; | |
286 | } | |
287 | ||
a077b666 LP |
288 | _public_ int sd_uid_get_display(uid_t uid, char **session) { |
289 | _cleanup_free_ char *p = NULL, *s = NULL; | |
290 | int r; | |
291 | ||
292 | assert_return(session, -EINVAL); | |
293 | ||
294 | r = file_of_uid(uid, &p); | |
295 | if (r < 0) | |
296 | return r; | |
297 | ||
298 | r = parse_env_file(p, NEWLINE, "DISPLAY", &s, NULL); | |
fc60d815 | 299 | if (r == -ENOENT) |
707b66c6 | 300 | return -ENODATA; |
a077b666 LP |
301 | if (r < 0) |
302 | return r; | |
a077b666 | 303 | if (isempty(s)) |
707b66c6 | 304 | return -ENODATA; |
a077b666 LP |
305 | |
306 | *session = s; | |
307 | s = NULL; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
707b66c6 LP |
312 | static int file_of_seat(const char *seat, char **_p) { |
313 | char *p; | |
314 | int r; | |
315 | ||
316 | assert(_p); | |
317 | ||
318 | if (seat) { | |
319 | if (!filename_is_valid(seat)) | |
320 | return -EINVAL; | |
321 | ||
322 | p = strappend("/run/systemd/seats/", seat); | |
323 | } else { | |
324 | _cleanup_free_ char *buf = NULL; | |
325 | ||
326 | r = sd_session_get_seat(NULL, &buf); | |
327 | if (r < 0) | |
328 | return r; | |
329 | ||
330 | p = strappend("/run/systemd/seats/", buf); | |
331 | } | |
332 | ||
333 | if (!p) | |
334 | return -ENOMEM; | |
335 | ||
336 | *_p = p; | |
337 | p = NULL; | |
338 | return 0; | |
339 | } | |
340 | ||
034a2a52 | 341 | _public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) { |
d70964d0 | 342 | _cleanup_free_ char *t = NULL, *s = NULL, *p = NULL; |
74b91131 LP |
343 | size_t l; |
344 | int r; | |
a2a5291b | 345 | const char *word, *variable, *state; |
74b91131 | 346 | |
a1f686da | 347 | assert_return(uid_is_valid(uid), -EINVAL); |
74b91131 | 348 | |
707b66c6 LP |
349 | r = file_of_seat(seat, &p); |
350 | if (r < 0) | |
351 | return r; | |
034a2a52 | 352 | |
707b66c6 | 353 | variable = require_active ? "ACTIVE_UID" : "UIDS"; |
74b91131 | 354 | |
034a2a52 | 355 | r = parse_env_file(p, NEWLINE, variable, &s, NULL); |
707b66c6 LP |
356 | if (r == -ENOENT) |
357 | return 0; | |
d70964d0 | 358 | if (r < 0) |
74b91131 | 359 | return r; |
707b66c6 LP |
360 | if (isempty(s)) |
361 | return 0; | |
74b91131 | 362 | |
de0671ee | 363 | if (asprintf(&t, UID_FMT, uid) < 0) |
74b91131 | 364 | return -ENOMEM; |
74b91131 | 365 | |
707b66c6 | 366 | FOREACH_WORD(word, l, s, state) |
a2a5291b | 367 | if (strneq(t, word, l)) |
74b91131 | 368 | return 1; |
74b91131 | 369 | |
74b91131 LP |
370 | return 0; |
371 | } | |
372 | ||
034a2a52 | 373 | static int uid_get_array(uid_t uid, const char *variable, char ***array) { |
d70964d0 | 374 | _cleanup_free_ char *p = NULL, *s = NULL; |
034a2a52 LP |
375 | char **a; |
376 | int r; | |
377 | ||
707b66c6 | 378 | assert(variable); |
a1f686da | 379 | |
a077b666 LP |
380 | r = file_of_uid(uid, &p); |
381 | if (r < 0) | |
382 | return r; | |
034a2a52 | 383 | |
707b66c6 LP |
384 | r = parse_env_file(p, NEWLINE, variable, &s, NULL); |
385 | if (r == -ENOENT || (r >= 0 && isempty(s))) { | |
d60ef526 LP |
386 | if (array) |
387 | *array = NULL; | |
034a2a52 LP |
388 | return 0; |
389 | } | |
707b66c6 LP |
390 | if (r < 0) |
391 | return r; | |
034a2a52 LP |
392 | |
393 | a = strv_split(s, " "); | |
034a2a52 LP |
394 | if (!a) |
395 | return -ENOMEM; | |
396 | ||
d60ef526 LP |
397 | strv_uniq(a); |
398 | r = strv_length(a); | |
399 | ||
400 | if (array) | |
401 | *array = a; | |
402 | else | |
403 | strv_free(a); | |
404 | ||
405 | return r; | |
034a2a52 LP |
406 | } |
407 | ||
408 | _public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) { | |
d18dff43 LP |
409 | return uid_get_array( |
410 | uid, | |
411 | require_active == 0 ? "ONLINE_SESSIONS" : | |
412 | require_active > 0 ? "ACTIVE_SESSIONS" : | |
413 | "SESSIONS", | |
414 | sessions); | |
74b91131 LP |
415 | } |
416 | ||
034a2a52 | 417 | _public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) { |
d18dff43 LP |
418 | return uid_get_array( |
419 | uid, | |
420 | require_active == 0 ? "ONLINE_SEATS" : | |
421 | require_active > 0 ? "ACTIVE_SEATS" : | |
422 | "SEATS", | |
423 | seats); | |
74b91131 LP |
424 | } |
425 | ||
50b1678a LP |
426 | static int file_of_session(const char *session, char **_p) { |
427 | char *p; | |
74b91131 | 428 | int r; |
74b91131 | 429 | |
50b1678a LP |
430 | assert(_p); |
431 | ||
4b549144 ZJS |
432 | if (session) { |
433 | if (!session_id_valid(session)) | |
434 | return -EINVAL; | |
435 | ||
50b1678a | 436 | p = strappend("/run/systemd/sessions/", session); |
4b549144 ZJS |
437 | } else { |
438 | _cleanup_free_ char *buf = NULL; | |
50b1678a LP |
439 | |
440 | r = sd_pid_get_session(0, &buf); | |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
444 | p = strappend("/run/systemd/sessions/", buf); | |
50b1678a | 445 | } |
74b91131 | 446 | |
74b91131 LP |
447 | if (!p) |
448 | return -ENOMEM; | |
449 | ||
50b1678a LP |
450 | *_p = p; |
451 | return 0; | |
452 | } | |
453 | ||
454 | _public_ int sd_session_is_active(const char *session) { | |
d70964d0 | 455 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 456 | int r; |
50b1678a LP |
457 | |
458 | r = file_of_session(session, &p); | |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
74b91131 | 462 | r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL); |
707b66c6 LP |
463 | if (r == -ENOENT) |
464 | return -ENXIO; | |
d70964d0 | 465 | if (r < 0) |
74b91131 | 466 | return r; |
707b66c6 | 467 | if (isempty(s)) |
74b91131 LP |
468 | return -EIO; |
469 | ||
0325941f | 470 | return parse_boolean(s); |
74b91131 LP |
471 | } |
472 | ||
5b04fe60 | 473 | _public_ int sd_session_is_remote(const char *session) { |
5b04fe60 | 474 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 475 | int r; |
5b04fe60 MM |
476 | |
477 | r = file_of_session(session, &p); | |
478 | if (r < 0) | |
479 | return r; | |
480 | ||
481 | r = parse_env_file(p, NEWLINE, "REMOTE", &s, NULL); | |
707b66c6 LP |
482 | if (r == -ENOENT) |
483 | return -ENXIO; | |
5b04fe60 MM |
484 | if (r < 0) |
485 | return r; | |
707b66c6 LP |
486 | if (isempty(s)) |
487 | return -ENODATA; | |
5b04fe60 | 488 | |
0325941f | 489 | return parse_boolean(s); |
5b04fe60 MM |
490 | } |
491 | ||
0604381b | 492 | _public_ int sd_session_get_state(const char *session, char **state) { |
d70964d0 | 493 | _cleanup_free_ char *p = NULL, *s = NULL; |
0604381b LP |
494 | int r; |
495 | ||
1ae464e0 | 496 | assert_return(state, -EINVAL); |
0604381b LP |
497 | |
498 | r = file_of_session(session, &p); | |
499 | if (r < 0) | |
500 | return r; | |
501 | ||
502 | r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); | |
707b66c6 LP |
503 | if (r == -ENOENT) |
504 | return -ENXIO; | |
d70964d0 | 505 | if (r < 0) |
0604381b | 506 | return r; |
707b66c6 | 507 | if (isempty(s)) |
0604381b LP |
508 | return -EIO; |
509 | ||
510 | *state = s; | |
d70964d0 HH |
511 | s = NULL; |
512 | ||
0604381b LP |
513 | return 0; |
514 | } | |
515 | ||
74b91131 LP |
516 | _public_ int sd_session_get_uid(const char *session, uid_t *uid) { |
517 | int r; | |
d70964d0 | 518 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 | 519 | |
1ae464e0 | 520 | assert_return(uid, -EINVAL); |
74b91131 | 521 | |
50b1678a LP |
522 | r = file_of_session(session, &p); |
523 | if (r < 0) | |
524 | return r; | |
74b91131 LP |
525 | |
526 | r = parse_env_file(p, NEWLINE, "UID", &s, NULL); | |
707b66c6 LP |
527 | if (r == -ENOENT) |
528 | return -ENXIO; | |
d70964d0 | 529 | if (r < 0) |
74b91131 | 530 | return r; |
707b66c6 | 531 | if (isempty(s)) |
74b91131 LP |
532 | return -EIO; |
533 | ||
0325941f | 534 | return parse_uid(s, uid); |
74b91131 LP |
535 | } |
536 | ||
51f58f08 | 537 | static int session_get_string(const char *session, const char *field, char **value) { |
d70964d0 | 538 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 LP |
539 | int r; |
540 | ||
1ae464e0 | 541 | assert_return(value, -EINVAL); |
707b66c6 | 542 | assert(field); |
74b91131 | 543 | |
50b1678a LP |
544 | r = file_of_session(session, &p); |
545 | if (r < 0) | |
546 | return r; | |
74b91131 | 547 | |
51f58f08 | 548 | r = parse_env_file(p, NEWLINE, field, &s, NULL); |
707b66c6 LP |
549 | if (r == -ENOENT) |
550 | return -ENXIO; | |
d70964d0 | 551 | if (r < 0) |
74b91131 | 552 | return r; |
74b91131 | 553 | if (isempty(s)) |
707b66c6 | 554 | return -ENODATA; |
74b91131 | 555 | |
51f58f08 | 556 | *value = s; |
d70964d0 | 557 | s = NULL; |
74b91131 LP |
558 | return 0; |
559 | } | |
560 | ||
51f58f08 LP |
561 | _public_ int sd_session_get_seat(const char *session, char **seat) { |
562 | return session_get_string(session, "SEAT", seat); | |
563 | } | |
eff40633 | 564 | |
c84f5e4a LP |
565 | _public_ int sd_session_get_tty(const char *session, char **tty) { |
566 | return session_get_string(session, "TTY", tty); | |
567 | } | |
568 | ||
44ded3ab | 569 | _public_ int sd_session_get_vt(const char *session, unsigned *vtnr) { |
3f4fee03 | 570 | _cleanup_free_ char *vtnr_string = NULL; |
44ded3ab GC |
571 | unsigned u; |
572 | int r; | |
573 | ||
707b66c6 LP |
574 | assert_return(vtnr, -EINVAL); |
575 | ||
0581dac2 | 576 | r = session_get_string(session, "VTNR", &vtnr_string); |
44ded3ab GC |
577 | if (r < 0) |
578 | return r; | |
579 | ||
580 | r = safe_atou(vtnr_string, &u); | |
581 | if (r < 0) | |
582 | return r; | |
583 | ||
584 | *vtnr = u; | |
585 | return 0; | |
586 | } | |
587 | ||
51f58f08 LP |
588 | _public_ int sd_session_get_service(const char *session, char **service) { |
589 | return session_get_string(session, "SERVICE", service); | |
590 | } | |
eff40633 | 591 | |
51f58f08 LP |
592 | _public_ int sd_session_get_type(const char *session, char **type) { |
593 | return session_get_string(session, "TYPE", type); | |
594 | } | |
eff40633 | 595 | |
51f58f08 LP |
596 | _public_ int sd_session_get_class(const char *session, char **class) { |
597 | return session_get_string(session, "CLASS", class); | |
eff40633 LP |
598 | } |
599 | ||
c72d5456 DH |
600 | _public_ int sd_session_get_desktop(const char *session, char **desktop) { |
601 | _cleanup_free_ char *escaped = NULL; | |
602 | char *t; | |
603 | int r; | |
604 | ||
605 | assert_return(desktop, -EINVAL); | |
606 | ||
607 | r = session_get_string(session, "DESKTOP", &escaped); | |
608 | if (r < 0) | |
609 | return r; | |
610 | ||
527b7a42 LP |
611 | r = cunescape(escaped, 0, &t); |
612 | if (r < 0) | |
613 | return r; | |
c72d5456 DH |
614 | |
615 | *desktop = t; | |
616 | return 0; | |
617 | } | |
618 | ||
fc8af9ff LP |
619 | _public_ int sd_session_get_display(const char *session, char **display) { |
620 | return session_get_string(session, "DISPLAY", display); | |
621 | } | |
622 | ||
5b04fe60 MM |
623 | _public_ int sd_session_get_remote_user(const char *session, char **remote_user) { |
624 | return session_get_string(session, "REMOTE_USER", remote_user); | |
625 | } | |
626 | ||
627 | _public_ int sd_session_get_remote_host(const char *session, char **remote_host) { | |
628 | return session_get_string(session, "REMOTE_HOST", remote_host); | |
629 | } | |
630 | ||
74b91131 | 631 | _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) { |
d70964d0 | 632 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
74b91131 LP |
633 | int r; |
634 | ||
1ae464e0 | 635 | assert_return(session || uid, -EINVAL); |
74b91131 | 636 | |
50b1678a LP |
637 | r = file_of_seat(seat, &p); |
638 | if (r < 0) | |
639 | return r; | |
74b91131 LP |
640 | |
641 | r = parse_env_file(p, NEWLINE, | |
642 | "ACTIVE", &s, | |
643 | "ACTIVE_UID", &t, | |
644 | NULL); | |
707b66c6 LP |
645 | if (r == -ENOENT) |
646 | return -ENXIO; | |
d70964d0 | 647 | if (r < 0) |
74b91131 | 648 | return r; |
74b91131 | 649 | |
d70964d0 | 650 | if (session && !s) |
4211d5bd | 651 | return -ENODATA; |
74b91131 | 652 | |
d70964d0 | 653 | if (uid && !t) |
4211d5bd | 654 | return -ENODATA; |
74b91131 LP |
655 | |
656 | if (uid && t) { | |
034a2a52 | 657 | r = parse_uid(t, uid); |
d70964d0 | 658 | if (r < 0) |
74b91131 | 659 | return r; |
74b91131 LP |
660 | } |
661 | ||
d70964d0 | 662 | if (session && s) { |
74b91131 | 663 | *session = s; |
d70964d0 HH |
664 | s = NULL; |
665 | } | |
74b91131 LP |
666 | |
667 | return 0; | |
668 | } | |
034a2a52 LP |
669 | |
670 | _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) { | |
d70964d0 HH |
671 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
672 | _cleanup_strv_free_ char **a = NULL; | |
673 | _cleanup_free_ uid_t *b = NULL; | |
034a2a52 LP |
674 | unsigned n = 0; |
675 | int r; | |
676 | ||
50b1678a LP |
677 | r = file_of_seat(seat, &p); |
678 | if (r < 0) | |
679 | return r; | |
034a2a52 LP |
680 | |
681 | r = parse_env_file(p, NEWLINE, | |
682 | "SESSIONS", &s, | |
683 | "ACTIVE_SESSIONS", &t, | |
684 | NULL); | |
707b66c6 LP |
685 | if (r == -ENOENT) |
686 | return -ENXIO; | |
d70964d0 | 687 | if (r < 0) |
034a2a52 | 688 | return r; |
034a2a52 | 689 | |
d60ef526 | 690 | if (s) { |
034a2a52 | 691 | a = strv_split(s, " "); |
d70964d0 | 692 | if (!a) |
034a2a52 | 693 | return -ENOMEM; |
034a2a52 LP |
694 | } |
695 | ||
034a2a52 | 696 | if (uids && t) { |
a2a5291b | 697 | const char *word, *state; |
034a2a52 | 698 | size_t l; |
034a2a52 | 699 | |
a2a5291b | 700 | FOREACH_WORD(word, l, t, state) |
034a2a52 LP |
701 | n++; |
702 | ||
d70964d0 | 703 | if (n > 0) { |
de3756ab | 704 | unsigned i = 0; |
034a2a52 | 705 | |
de3756ab | 706 | b = new(uid_t, n); |
d70964d0 | 707 | if (!b) |
034a2a52 | 708 | return -ENOMEM; |
034a2a52 | 709 | |
a2a5291b | 710 | FOREACH_WORD(word, l, t, state) { |
d70964d0 | 711 | _cleanup_free_ char *k = NULL; |
034a2a52 | 712 | |
a2a5291b | 713 | k = strndup(word, l); |
d70964d0 | 714 | if (!k) |
de3756ab | 715 | return -ENOMEM; |
de3756ab LP |
716 | |
717 | r = parse_uid(k, b + i); | |
de3756ab LP |
718 | if (r < 0) |
719 | continue; | |
720 | ||
721 | i++; | |
722 | } | |
034a2a52 LP |
723 | } |
724 | } | |
725 | ||
d60ef526 LP |
726 | r = strv_length(a); |
727 | ||
d70964d0 | 728 | if (sessions) { |
034a2a52 | 729 | *sessions = a; |
d70964d0 HH |
730 | a = NULL; |
731 | } | |
034a2a52 | 732 | |
d70964d0 | 733 | if (uids) { |
034a2a52 | 734 | *uids = b; |
d70964d0 HH |
735 | b = NULL; |
736 | } | |
034a2a52 LP |
737 | |
738 | if (n_uids) | |
739 | *n_uids = n; | |
740 | ||
d60ef526 | 741 | return r; |
034a2a52 LP |
742 | } |
743 | ||
20747498 | 744 | static int seat_get_can(const char *seat, const char *variable) { |
d70964d0 | 745 | _cleanup_free_ char *p = NULL, *s = NULL; |
add30678 LP |
746 | int r; |
747 | ||
707b66c6 | 748 | assert(variable); |
0325941f | 749 | |
50b1678a LP |
750 | r = file_of_seat(seat, &p); |
751 | if (r < 0) | |
752 | return r; | |
add30678 LP |
753 | |
754 | r = parse_env_file(p, NEWLINE, | |
20747498 | 755 | variable, &s, |
add30678 | 756 | NULL); |
707b66c6 LP |
757 | if (r == -ENOENT) |
758 | return -ENXIO; | |
d70964d0 | 759 | if (r < 0) |
add30678 | 760 | return r; |
707b66c6 LP |
761 | if (isempty(s)) |
762 | return -ENODATA; | |
add30678 | 763 | |
0325941f | 764 | return parse_boolean(s); |
add30678 LP |
765 | } |
766 | ||
20747498 LP |
767 | _public_ int sd_seat_can_multi_session(const char *seat) { |
768 | return seat_get_can(seat, "CAN_MULTI_SESSION"); | |
769 | } | |
770 | ||
771 | _public_ int sd_seat_can_tty(const char *seat) { | |
772 | return seat_get_can(seat, "CAN_TTY"); | |
773 | } | |
774 | ||
775 | _public_ int sd_seat_can_graphical(const char *seat) { | |
776 | return seat_get_can(seat, "CAN_GRAPHICAL"); | |
777 | } | |
778 | ||
034a2a52 | 779 | _public_ int sd_get_seats(char ***seats) { |
034a2a52 LP |
780 | return get_files_in_directory("/run/systemd/seats/", seats); |
781 | } | |
782 | ||
783 | _public_ int sd_get_sessions(char ***sessions) { | |
034a2a52 LP |
784 | return get_files_in_directory("/run/systemd/sessions/", sessions); |
785 | } | |
786 | ||
787 | _public_ int sd_get_uids(uid_t **users) { | |
d70964d0 | 788 | _cleanup_closedir_ DIR *d; |
034a2a52 LP |
789 | int r = 0; |
790 | unsigned n = 0; | |
d70964d0 | 791 | _cleanup_free_ uid_t *l = NULL; |
034a2a52 | 792 | |
034a2a52 | 793 | d = opendir("/run/systemd/users/"); |
8ea913b2 LP |
794 | if (!d) |
795 | return -errno; | |
796 | ||
034a2a52 | 797 | for (;;) { |
7d5e9c0f | 798 | struct dirent *de; |
034a2a52 LP |
799 | int k; |
800 | uid_t uid; | |
801 | ||
66c7a533 FW |
802 | errno = 0; |
803 | de = readdir(d); | |
804 | if (!de && errno != 0) | |
805 | return -errno; | |
034a2a52 LP |
806 | |
807 | if (!de) | |
808 | break; | |
809 | ||
810 | dirent_ensure_type(d, de); | |
811 | ||
812 | if (!dirent_is_file(de)) | |
813 | continue; | |
814 | ||
815 | k = parse_uid(de->d_name, &uid); | |
816 | if (k < 0) | |
817 | continue; | |
818 | ||
d60ef526 LP |
819 | if (users) { |
820 | if ((unsigned) r >= n) { | |
821 | uid_t *t; | |
034a2a52 | 822 | |
d60ef526 LP |
823 | n = MAX(16, 2*r); |
824 | t = realloc(l, sizeof(uid_t) * n); | |
d70964d0 HH |
825 | if (!t) |
826 | return -ENOMEM; | |
034a2a52 | 827 | |
d60ef526 LP |
828 | l = t; |
829 | } | |
034a2a52 | 830 | |
d60ef526 LP |
831 | assert((unsigned) r < n); |
832 | l[r++] = uid; | |
833 | } else | |
834 | r++; | |
034a2a52 LP |
835 | } |
836 | ||
d70964d0 HH |
837 | if (users) { |
838 | *users = l; | |
839 | l = NULL; | |
840 | } | |
034a2a52 LP |
841 | |
842 | return r; | |
843 | } | |
844 | ||
4d5fb962 | 845 | _public_ int sd_get_machine_names(char ***machines) { |
89f7c846 LP |
846 | char **l = NULL, **a, **b; |
847 | int r; | |
848 | ||
0325941f LP |
849 | assert_return(machines, -EINVAL); |
850 | ||
89f7c846 LP |
851 | r = get_files_in_directory("/run/systemd/machines/", &l); |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | if (l) { | |
856 | r = 0; | |
857 | ||
858 | /* Filter out the unit: symlinks */ | |
859 | for (a = l, b = l; *a; a++) { | |
b9a8d250 | 860 | if (startswith(*a, "unit:") || !machine_name_is_valid(*a)) |
89f7c846 LP |
861 | free(*a); |
862 | else { | |
863 | *b = *a; | |
864 | b++; | |
865 | r++; | |
866 | } | |
867 | } | |
868 | ||
869 | *b = NULL; | |
870 | } | |
871 | ||
872 | *machines = l; | |
873 | return r; | |
a20affe2 LP |
874 | } |
875 | ||
0325941f LP |
876 | _public_ int sd_machine_get_class(const char *machine, char **class) { |
877 | _cleanup_free_ char *c = NULL; | |
878 | const char *p; | |
879 | int r; | |
880 | ||
620a687c | 881 | assert_return(machine_name_is_valid(machine), -EINVAL); |
0325941f LP |
882 | assert_return(class, -EINVAL); |
883 | ||
63c372cb | 884 | p = strjoina("/run/systemd/machines/", machine); |
0325941f | 885 | r = parse_env_file(p, NEWLINE, "CLASS", &c, NULL); |
707b66c6 LP |
886 | if (r == -ENOENT) |
887 | return -ENXIO; | |
0325941f LP |
888 | if (r < 0) |
889 | return r; | |
890 | if (!c) | |
891 | return -EIO; | |
892 | ||
893 | *class = c; | |
894 | c = NULL; | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
634af566 | 899 | _public_ int sd_machine_get_ifindices(const char *machine, int **ifindices) { |
cabb0bc6 LP |
900 | _cleanup_free_ char *netif = NULL; |
901 | size_t l, allocated = 0, nr = 0; | |
cabb0bc6 | 902 | int *ni = NULL; |
a2a5291b | 903 | const char *p, *word, *state; |
cabb0bc6 LP |
904 | int r; |
905 | ||
906 | assert_return(machine_name_is_valid(machine), -EINVAL); | |
634af566 | 907 | assert_return(ifindices, -EINVAL); |
cabb0bc6 | 908 | |
63c372cb | 909 | p = strjoina("/run/systemd/machines/", machine); |
cabb0bc6 | 910 | r = parse_env_file(p, NEWLINE, "NETIF", &netif, NULL); |
707b66c6 LP |
911 | if (r == -ENOENT) |
912 | return -ENXIO; | |
cabb0bc6 LP |
913 | if (r < 0) |
914 | return r; | |
915 | if (!netif) { | |
634af566 | 916 | *ifindices = NULL; |
cabb0bc6 LP |
917 | return 0; |
918 | } | |
919 | ||
a2a5291b | 920 | FOREACH_WORD(word, l, netif, state) { |
cabb0bc6 LP |
921 | char buf[l+1]; |
922 | int ifi; | |
923 | ||
a2a5291b | 924 | *(char*) (mempcpy(buf, word, l)) = 0; |
cabb0bc6 LP |
925 | |
926 | if (safe_atoi(buf, &ifi) < 0) | |
927 | continue; | |
928 | if (ifi <= 0) | |
929 | continue; | |
930 | ||
931 | if (!GREEDY_REALLOC(ni, allocated, nr+1)) { | |
932 | free(ni); | |
933 | return -ENOMEM; | |
934 | } | |
935 | ||
936 | ni[nr++] = ifi; | |
937 | } | |
938 | ||
634af566 | 939 | *ifindices = ni; |
cabb0bc6 LP |
940 | return nr; |
941 | } | |
942 | ||
034a2a52 LP |
943 | static inline int MONITOR_TO_FD(sd_login_monitor *m) { |
944 | return (int) (unsigned long) m - 1; | |
945 | } | |
946 | ||
947 | static inline sd_login_monitor* FD_TO_MONITOR(int fd) { | |
948 | return (sd_login_monitor*) (unsigned long) (fd + 1); | |
949 | } | |
950 | ||
951 | _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) { | |
034a2a52 LP |
952 | int fd, k; |
953 | bool good = false; | |
954 | ||
1ae464e0 | 955 | assert_return(m, -EINVAL); |
034a2a52 LP |
956 | |
957 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
958 | if (fd < 0) | |
bcb161b0 | 959 | return -errno; |
034a2a52 LP |
960 | |
961 | if (!category || streq(category, "seat")) { | |
962 | k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE); | |
963 | if (k < 0) { | |
03e334a1 | 964 | safe_close(fd); |
034a2a52 LP |
965 | return -errno; |
966 | } | |
967 | ||
968 | good = true; | |
969 | } | |
970 | ||
971 | if (!category || streq(category, "session")) { | |
972 | k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE); | |
973 | if (k < 0) { | |
03e334a1 | 974 | safe_close(fd); |
034a2a52 LP |
975 | return -errno; |
976 | } | |
977 | ||
978 | good = true; | |
979 | } | |
980 | ||
981 | if (!category || streq(category, "uid")) { | |
982 | k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE); | |
983 | if (k < 0) { | |
03e334a1 | 984 | safe_close(fd); |
034a2a52 LP |
985 | return -errno; |
986 | } | |
987 | ||
988 | good = true; | |
989 | } | |
990 | ||
e10375f2 | 991 | if (!category || streq(category, "machine")) { |
ba73ed85 | 992 | k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE); |
e10375f2 | 993 | if (k < 0) { |
03e334a1 | 994 | safe_close(fd); |
e10375f2 LP |
995 | return -errno; |
996 | } | |
997 | ||
998 | good = true; | |
999 | } | |
1000 | ||
034a2a52 LP |
1001 | if (!good) { |
1002 | close_nointr(fd); | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | ||
1006 | *m = FD_TO_MONITOR(fd); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { | |
1011 | int fd; | |
1012 | ||
1ae464e0 | 1013 | assert_return(m, NULL); |
034a2a52 LP |
1014 | |
1015 | fd = MONITOR_TO_FD(m); | |
1016 | close_nointr(fd); | |
1017 | ||
1018 | return NULL; | |
1019 | } | |
1020 | ||
1021 | _public_ int sd_login_monitor_flush(sd_login_monitor *m) { | |
1022 | ||
1ae464e0 | 1023 | assert_return(m, -EINVAL); |
034a2a52 LP |
1024 | |
1025 | return flush_fd(MONITOR_TO_FD(m)); | |
1026 | } | |
1027 | ||
1028 | _public_ int sd_login_monitor_get_fd(sd_login_monitor *m) { | |
1029 | ||
1ae464e0 | 1030 | assert_return(m, -EINVAL); |
034a2a52 LP |
1031 | |
1032 | return MONITOR_TO_FD(m); | |
1033 | } | |
dace83cb LP |
1034 | |
1035 | _public_ int sd_login_monitor_get_events(sd_login_monitor *m) { | |
1036 | ||
1ae464e0 | 1037 | assert_return(m, -EINVAL); |
dace83cb | 1038 | |
667c24a6 LP |
1039 | /* For now we will only return POLLIN here, since we don't |
1040 | * need anything else ever for inotify. However, let's have | |
1041 | * this API to keep our options open should we later on need | |
1042 | * it. */ | |
dace83cb LP |
1043 | return POLLIN; |
1044 | } | |
667c24a6 LP |
1045 | |
1046 | _public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) { | |
1047 | ||
1ae464e0 TA |
1048 | assert_return(m, -EINVAL); |
1049 | assert_return(timeout_usec, -EINVAL); | |
667c24a6 LP |
1050 | |
1051 | /* For now we will only return (uint64_t) -1, since we don't | |
1052 | * need any timeout. However, let's have this API to keep our | |
1053 | * options open should we later on need it. */ | |
1054 | *timeout_usec = (uint64_t) -1; | |
1055 | return 0; | |
1056 | } |