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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" |
3ffd4af2 | 32 | #include "fd-util.h" |
a5c32cff | 33 | #include "fileio.h" |
6482f626 | 34 | #include "formats-util.h" |
25300b5a | 35 | #include "hostname-util.h" |
c004493c | 36 | #include "io-util.h" |
4f5dd394 LP |
37 | #include "login-util.h" |
38 | #include "macro.h" | |
6bedfcbb | 39 | #include "parse-util.h" |
bb15fafe | 40 | #include "path-util.h" |
2583fbea | 41 | #include "socket-util.h" |
07630cea | 42 | #include "string-util.h" |
4f5dd394 | 43 | #include "strv.h" |
b1d4f8e1 | 44 | #include "user-util.h" |
4f5dd394 | 45 | #include "util.h" |
a0956174 | 46 | #include "dirent-util.h" |
74b91131 | 47 | |
707b66c6 LP |
48 | /* Error codes: |
49 | * | |
50 | * invalid input parameters → -EINVAL | |
51 | * invalid fd → -EBADF | |
52 | * process does not exist → -ESRCH | |
53 | * cgroup does not exist → -ENOENT | |
54 | * machine, session does not exist → -ENXIO | |
55 | * requested metadata on object is missing → -ENODATA | |
56 | */ | |
57 | ||
034a2a52 | 58 | _public_ int sd_pid_get_session(pid_t pid, char **session) { |
ba1261bc | 59 | |
1ae464e0 TA |
60 | assert_return(pid >= 0, -EINVAL); |
61 | assert_return(session, -EINVAL); | |
034a2a52 | 62 | |
7027ff61 | 63 | return cg_pid_get_session(pid, session); |
74b91131 LP |
64 | } |
65 | ||
94fb446e | 66 | _public_ int sd_pid_get_unit(pid_t pid, char **unit) { |
9847946e | 67 | |
1ae464e0 TA |
68 | assert_return(pid >= 0, -EINVAL); |
69 | assert_return(unit, -EINVAL); | |
9847946e | 70 | |
ba1261bc | 71 | return cg_pid_get_unit(pid, unit); |
9847946e LP |
72 | } |
73 | ||
97e13058 LP |
74 | _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { |
75 | ||
1ae464e0 TA |
76 | assert_return(pid >= 0, -EINVAL); |
77 | assert_return(unit, -EINVAL); | |
97e13058 LP |
78 | |
79 | return cg_pid_get_user_unit(pid, unit); | |
80 | } | |
81 | ||
7027ff61 LP |
82 | _public_ int sd_pid_get_machine_name(pid_t pid, char **name) { |
83 | ||
1ae464e0 TA |
84 | assert_return(pid >= 0, -EINVAL); |
85 | assert_return(name, -EINVAL); | |
7027ff61 LP |
86 | |
87 | return cg_pid_get_machine_name(pid, name); | |
88 | } | |
89 | ||
1021b21b LP |
90 | _public_ int sd_pid_get_slice(pid_t pid, char **slice) { |
91 | ||
1ae464e0 TA |
92 | assert_return(pid >= 0, -EINVAL); |
93 | assert_return(slice, -EINVAL); | |
1021b21b LP |
94 | |
95 | return cg_pid_get_slice(pid, slice); | |
96 | } | |
97 | ||
329ac4bc LP |
98 | _public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { |
99 | ||
100 | assert_return(pid >= 0, -EINVAL); | |
101 | assert_return(slice, -EINVAL); | |
102 | ||
103 | return cg_pid_get_user_slice(pid, slice); | |
104 | } | |
105 | ||
034a2a52 | 106 | _public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { |
034a2a52 | 107 | |
1ae464e0 TA |
108 | assert_return(pid >= 0, -EINVAL); |
109 | assert_return(uid, -EINVAL); | |
034a2a52 | 110 | |
ae018d9b | 111 | return cg_pid_get_owner_uid(pid, uid); |
034a2a52 LP |
112 | } |
113 | ||
f5aaf575 LP |
114 | _public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) { |
115 | char *c; | |
116 | int r; | |
117 | ||
118 | assert_return(pid >= 0, -EINVAL); | |
119 | assert_return(cgroup, -EINVAL); | |
120 | ||
121 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c); | |
122 | if (r < 0) | |
123 | return r; | |
124 | ||
125 | /* The internal APIs return the empty string for the root | |
126 | * cgroup, let's return the "/" in the public APIs instead, as | |
127 | * that's easier and less ambigious for people to grok. */ | |
128 | if (isempty(c)) { | |
129 | free(c); | |
130 | c = strdup("/"); | |
131 | if (!c) | |
132 | return -ENOMEM; | |
133 | ||
134 | } | |
135 | ||
136 | *cgroup = c; | |
137 | return 0; | |
138 | } | |
139 | ||
bf34ab14 | 140 | _public_ int sd_peer_get_session(int fd, char **session) { |
a7f7d1bd | 141 | struct ucred ucred = {}; |
bf34ab14 LP |
142 | int r; |
143 | ||
8ac43fee | 144 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
145 | assert_return(session, -EINVAL); |
146 | ||
147 | r = getpeercred(fd, &ucred); | |
148 | if (r < 0) | |
149 | return r; | |
150 | ||
151 | return cg_pid_get_session(ucred.pid, session); | |
152 | } | |
153 | ||
154 | _public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) { | |
155 | struct ucred ucred; | |
156 | int r; | |
157 | ||
8ac43fee | 158 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
159 | assert_return(uid, -EINVAL); |
160 | ||
161 | r = getpeercred(fd, &ucred); | |
162 | if (r < 0) | |
163 | return r; | |
164 | ||
165 | return cg_pid_get_owner_uid(ucred.pid, uid); | |
166 | } | |
167 | ||
168 | _public_ int sd_peer_get_unit(int fd, char **unit) { | |
169 | struct ucred ucred; | |
170 | int r; | |
171 | ||
8ac43fee | 172 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
173 | assert_return(unit, -EINVAL); |
174 | ||
175 | r = getpeercred(fd, &ucred); | |
176 | if (r < 0) | |
177 | return r; | |
178 | ||
179 | return cg_pid_get_unit(ucred.pid, unit); | |
180 | } | |
181 | ||
182 | _public_ int sd_peer_get_user_unit(int fd, char **unit) { | |
183 | struct ucred ucred; | |
184 | int r; | |
185 | ||
8ac43fee | 186 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
187 | assert_return(unit, -EINVAL); |
188 | ||
189 | r = getpeercred(fd, &ucred); | |
190 | if (r < 0) | |
191 | return r; | |
192 | ||
193 | return cg_pid_get_user_unit(ucred.pid, unit); | |
194 | } | |
195 | ||
196 | _public_ int sd_peer_get_machine_name(int fd, char **machine) { | |
197 | struct ucred ucred; | |
198 | int r; | |
199 | ||
8ac43fee | 200 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
201 | assert_return(machine, -EINVAL); |
202 | ||
203 | r = getpeercred(fd, &ucred); | |
204 | if (r < 0) | |
205 | return r; | |
206 | ||
207 | return cg_pid_get_machine_name(ucred.pid, machine); | |
208 | } | |
209 | ||
210 | _public_ int sd_peer_get_slice(int fd, char **slice) { | |
211 | struct ucred ucred; | |
212 | int r; | |
213 | ||
8ac43fee | 214 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
215 | assert_return(slice, -EINVAL); |
216 | ||
217 | r = getpeercred(fd, &ucred); | |
218 | if (r < 0) | |
219 | return r; | |
220 | ||
221 | return cg_pid_get_slice(ucred.pid, slice); | |
222 | } | |
223 | ||
329ac4bc LP |
224 | _public_ int sd_peer_get_user_slice(int fd, char **slice) { |
225 | struct ucred ucred; | |
226 | int r; | |
227 | ||
8ac43fee | 228 | assert_return(fd >= 0, -EBADF); |
329ac4bc LP |
229 | assert_return(slice, -EINVAL); |
230 | ||
231 | r = getpeercred(fd, &ucred); | |
232 | if (r < 0) | |
233 | return r; | |
234 | ||
235 | return cg_pid_get_user_slice(ucred.pid, slice); | |
236 | } | |
237 | ||
f5aaf575 LP |
238 | _public_ int sd_peer_get_cgroup(int fd, char **cgroup) { |
239 | struct ucred ucred; | |
240 | int r; | |
241 | ||
242 | assert_return(fd >= 0, -EBADF); | |
243 | assert_return(cgroup, -EINVAL); | |
244 | ||
245 | r = getpeercred(fd, &ucred); | |
246 | if (r < 0) | |
247 | return r; | |
248 | ||
249 | return sd_pid_get_cgroup(ucred.pid, cgroup); | |
250 | } | |
251 | ||
a077b666 | 252 | static int file_of_uid(uid_t uid, char **p) { |
707b66c6 LP |
253 | |
254 | assert_return(uid_is_valid(uid), -EINVAL); | |
a077b666 LP |
255 | assert(p); |
256 | ||
257 | if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0) | |
258 | return -ENOMEM; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
74b91131 | 263 | _public_ int sd_uid_get_state(uid_t uid, char**state) { |
bf34ab14 LP |
264 | _cleanup_free_ char *p = NULL; |
265 | char *s = NULL; | |
74b91131 LP |
266 | int r; |
267 | ||
1ae464e0 | 268 | assert_return(state, -EINVAL); |
74b91131 | 269 | |
a077b666 LP |
270 | r = file_of_uid(uid, &p); |
271 | if (r < 0) | |
272 | return r; | |
74b91131 LP |
273 | |
274 | r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); | |
74b91131 LP |
275 | if (r == -ENOENT) { |
276 | free(s); | |
277 | s = strdup("offline"); | |
278 | if (!s) | |
279 | return -ENOMEM; | |
280 | ||
707b66c6 LP |
281 | } |
282 | if (r < 0) { | |
74b91131 LP |
283 | free(s); |
284 | return r; | |
707b66c6 LP |
285 | } |
286 | if (isempty(s)) { | |
287 | free(s); | |
74b91131 | 288 | return -EIO; |
707b66c6 | 289 | } |
74b91131 LP |
290 | |
291 | *state = s; | |
292 | return 0; | |
293 | } | |
294 | ||
a077b666 LP |
295 | _public_ int sd_uid_get_display(uid_t uid, char **session) { |
296 | _cleanup_free_ char *p = NULL, *s = NULL; | |
297 | int r; | |
298 | ||
299 | assert_return(session, -EINVAL); | |
300 | ||
301 | r = file_of_uid(uid, &p); | |
302 | if (r < 0) | |
303 | return r; | |
304 | ||
305 | r = parse_env_file(p, NEWLINE, "DISPLAY", &s, NULL); | |
fc60d815 | 306 | if (r == -ENOENT) |
707b66c6 | 307 | return -ENODATA; |
a077b666 LP |
308 | if (r < 0) |
309 | return r; | |
a077b666 | 310 | if (isempty(s)) |
707b66c6 | 311 | return -ENODATA; |
a077b666 LP |
312 | |
313 | *session = s; | |
314 | s = NULL; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
707b66c6 LP |
319 | static int file_of_seat(const char *seat, char **_p) { |
320 | char *p; | |
321 | int r; | |
322 | ||
323 | assert(_p); | |
324 | ||
325 | if (seat) { | |
326 | if (!filename_is_valid(seat)) | |
327 | return -EINVAL; | |
328 | ||
329 | p = strappend("/run/systemd/seats/", seat); | |
330 | } else { | |
331 | _cleanup_free_ char *buf = NULL; | |
332 | ||
333 | r = sd_session_get_seat(NULL, &buf); | |
334 | if (r < 0) | |
335 | return r; | |
336 | ||
337 | p = strappend("/run/systemd/seats/", buf); | |
338 | } | |
339 | ||
340 | if (!p) | |
341 | return -ENOMEM; | |
342 | ||
343 | *_p = p; | |
344 | p = NULL; | |
345 | return 0; | |
346 | } | |
347 | ||
034a2a52 | 348 | _public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) { |
d70964d0 | 349 | _cleanup_free_ char *t = NULL, *s = NULL, *p = NULL; |
74b91131 LP |
350 | size_t l; |
351 | int r; | |
a2a5291b | 352 | const char *word, *variable, *state; |
74b91131 | 353 | |
a1f686da | 354 | assert_return(uid_is_valid(uid), -EINVAL); |
74b91131 | 355 | |
707b66c6 LP |
356 | r = file_of_seat(seat, &p); |
357 | if (r < 0) | |
358 | return r; | |
034a2a52 | 359 | |
707b66c6 | 360 | variable = require_active ? "ACTIVE_UID" : "UIDS"; |
74b91131 | 361 | |
034a2a52 | 362 | r = parse_env_file(p, NEWLINE, variable, &s, NULL); |
707b66c6 LP |
363 | if (r == -ENOENT) |
364 | return 0; | |
d70964d0 | 365 | if (r < 0) |
74b91131 | 366 | return r; |
707b66c6 LP |
367 | if (isempty(s)) |
368 | return 0; | |
74b91131 | 369 | |
de0671ee | 370 | if (asprintf(&t, UID_FMT, uid) < 0) |
74b91131 | 371 | return -ENOMEM; |
74b91131 | 372 | |
707b66c6 | 373 | FOREACH_WORD(word, l, s, state) |
a2a5291b | 374 | if (strneq(t, word, l)) |
74b91131 | 375 | return 1; |
74b91131 | 376 | |
74b91131 LP |
377 | return 0; |
378 | } | |
379 | ||
034a2a52 | 380 | static int uid_get_array(uid_t uid, const char *variable, char ***array) { |
d70964d0 | 381 | _cleanup_free_ char *p = NULL, *s = NULL; |
034a2a52 LP |
382 | char **a; |
383 | int r; | |
384 | ||
707b66c6 | 385 | assert(variable); |
a1f686da | 386 | |
a077b666 LP |
387 | r = file_of_uid(uid, &p); |
388 | if (r < 0) | |
389 | return r; | |
034a2a52 | 390 | |
707b66c6 LP |
391 | r = parse_env_file(p, NEWLINE, variable, &s, NULL); |
392 | if (r == -ENOENT || (r >= 0 && isempty(s))) { | |
d60ef526 LP |
393 | if (array) |
394 | *array = NULL; | |
034a2a52 LP |
395 | return 0; |
396 | } | |
707b66c6 LP |
397 | if (r < 0) |
398 | return r; | |
034a2a52 LP |
399 | |
400 | a = strv_split(s, " "); | |
034a2a52 LP |
401 | if (!a) |
402 | return -ENOMEM; | |
403 | ||
d60ef526 LP |
404 | strv_uniq(a); |
405 | r = strv_length(a); | |
406 | ||
407 | if (array) | |
408 | *array = a; | |
409 | else | |
410 | strv_free(a); | |
411 | ||
412 | return r; | |
034a2a52 LP |
413 | } |
414 | ||
415 | _public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) { | |
d18dff43 LP |
416 | return uid_get_array( |
417 | uid, | |
418 | require_active == 0 ? "ONLINE_SESSIONS" : | |
419 | require_active > 0 ? "ACTIVE_SESSIONS" : | |
420 | "SESSIONS", | |
421 | sessions); | |
74b91131 LP |
422 | } |
423 | ||
034a2a52 | 424 | _public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) { |
d18dff43 LP |
425 | return uid_get_array( |
426 | uid, | |
427 | require_active == 0 ? "ONLINE_SEATS" : | |
428 | require_active > 0 ? "ACTIVE_SEATS" : | |
429 | "SEATS", | |
430 | seats); | |
74b91131 LP |
431 | } |
432 | ||
50b1678a LP |
433 | static int file_of_session(const char *session, char **_p) { |
434 | char *p; | |
74b91131 | 435 | int r; |
74b91131 | 436 | |
50b1678a LP |
437 | assert(_p); |
438 | ||
4b549144 ZJS |
439 | if (session) { |
440 | if (!session_id_valid(session)) | |
441 | return -EINVAL; | |
442 | ||
50b1678a | 443 | p = strappend("/run/systemd/sessions/", session); |
4b549144 ZJS |
444 | } else { |
445 | _cleanup_free_ char *buf = NULL; | |
50b1678a LP |
446 | |
447 | r = sd_pid_get_session(0, &buf); | |
448 | if (r < 0) | |
449 | return r; | |
450 | ||
451 | p = strappend("/run/systemd/sessions/", buf); | |
50b1678a | 452 | } |
74b91131 | 453 | |
74b91131 LP |
454 | if (!p) |
455 | return -ENOMEM; | |
456 | ||
50b1678a LP |
457 | *_p = p; |
458 | return 0; | |
459 | } | |
460 | ||
461 | _public_ int sd_session_is_active(const char *session) { | |
d70964d0 | 462 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 463 | int r; |
50b1678a LP |
464 | |
465 | r = file_of_session(session, &p); | |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
74b91131 | 469 | r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL); |
707b66c6 LP |
470 | if (r == -ENOENT) |
471 | return -ENXIO; | |
d70964d0 | 472 | if (r < 0) |
74b91131 | 473 | return r; |
707b66c6 | 474 | if (isempty(s)) |
74b91131 LP |
475 | return -EIO; |
476 | ||
0325941f | 477 | return parse_boolean(s); |
74b91131 LP |
478 | } |
479 | ||
5b04fe60 | 480 | _public_ int sd_session_is_remote(const char *session) { |
5b04fe60 | 481 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 482 | int r; |
5b04fe60 MM |
483 | |
484 | r = file_of_session(session, &p); | |
485 | if (r < 0) | |
486 | return r; | |
487 | ||
488 | r = parse_env_file(p, NEWLINE, "REMOTE", &s, NULL); | |
707b66c6 LP |
489 | if (r == -ENOENT) |
490 | return -ENXIO; | |
5b04fe60 MM |
491 | if (r < 0) |
492 | return r; | |
707b66c6 LP |
493 | if (isempty(s)) |
494 | return -ENODATA; | |
5b04fe60 | 495 | |
0325941f | 496 | return parse_boolean(s); |
5b04fe60 MM |
497 | } |
498 | ||
0604381b | 499 | _public_ int sd_session_get_state(const char *session, char **state) { |
d70964d0 | 500 | _cleanup_free_ char *p = NULL, *s = NULL; |
0604381b LP |
501 | int r; |
502 | ||
1ae464e0 | 503 | assert_return(state, -EINVAL); |
0604381b LP |
504 | |
505 | r = file_of_session(session, &p); | |
506 | if (r < 0) | |
507 | return r; | |
508 | ||
509 | r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); | |
707b66c6 LP |
510 | if (r == -ENOENT) |
511 | return -ENXIO; | |
d70964d0 | 512 | if (r < 0) |
0604381b | 513 | return r; |
707b66c6 | 514 | if (isempty(s)) |
0604381b LP |
515 | return -EIO; |
516 | ||
517 | *state = s; | |
d70964d0 HH |
518 | s = NULL; |
519 | ||
0604381b LP |
520 | return 0; |
521 | } | |
522 | ||
74b91131 LP |
523 | _public_ int sd_session_get_uid(const char *session, uid_t *uid) { |
524 | int r; | |
d70964d0 | 525 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 | 526 | |
1ae464e0 | 527 | assert_return(uid, -EINVAL); |
74b91131 | 528 | |
50b1678a LP |
529 | r = file_of_session(session, &p); |
530 | if (r < 0) | |
531 | return r; | |
74b91131 LP |
532 | |
533 | r = parse_env_file(p, NEWLINE, "UID", &s, NULL); | |
707b66c6 LP |
534 | if (r == -ENOENT) |
535 | return -ENXIO; | |
d70964d0 | 536 | if (r < 0) |
74b91131 | 537 | return r; |
707b66c6 | 538 | if (isempty(s)) |
74b91131 LP |
539 | return -EIO; |
540 | ||
0325941f | 541 | return parse_uid(s, uid); |
74b91131 LP |
542 | } |
543 | ||
51f58f08 | 544 | static int session_get_string(const char *session, const char *field, char **value) { |
d70964d0 | 545 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 LP |
546 | int r; |
547 | ||
1ae464e0 | 548 | assert_return(value, -EINVAL); |
707b66c6 | 549 | assert(field); |
74b91131 | 550 | |
50b1678a LP |
551 | r = file_of_session(session, &p); |
552 | if (r < 0) | |
553 | return r; | |
74b91131 | 554 | |
51f58f08 | 555 | r = parse_env_file(p, NEWLINE, field, &s, NULL); |
707b66c6 LP |
556 | if (r == -ENOENT) |
557 | return -ENXIO; | |
d70964d0 | 558 | if (r < 0) |
74b91131 | 559 | return r; |
74b91131 | 560 | if (isempty(s)) |
707b66c6 | 561 | return -ENODATA; |
74b91131 | 562 | |
51f58f08 | 563 | *value = s; |
d70964d0 | 564 | s = NULL; |
74b91131 LP |
565 | return 0; |
566 | } | |
567 | ||
51f58f08 LP |
568 | _public_ int sd_session_get_seat(const char *session, char **seat) { |
569 | return session_get_string(session, "SEAT", seat); | |
570 | } | |
eff40633 | 571 | |
c84f5e4a LP |
572 | _public_ int sd_session_get_tty(const char *session, char **tty) { |
573 | return session_get_string(session, "TTY", tty); | |
574 | } | |
575 | ||
44ded3ab | 576 | _public_ int sd_session_get_vt(const char *session, unsigned *vtnr) { |
3f4fee03 | 577 | _cleanup_free_ char *vtnr_string = NULL; |
44ded3ab GC |
578 | unsigned u; |
579 | int r; | |
580 | ||
707b66c6 LP |
581 | assert_return(vtnr, -EINVAL); |
582 | ||
0581dac2 | 583 | r = session_get_string(session, "VTNR", &vtnr_string); |
44ded3ab GC |
584 | if (r < 0) |
585 | return r; | |
586 | ||
587 | r = safe_atou(vtnr_string, &u); | |
588 | if (r < 0) | |
589 | return r; | |
590 | ||
591 | *vtnr = u; | |
592 | return 0; | |
593 | } | |
594 | ||
51f58f08 LP |
595 | _public_ int sd_session_get_service(const char *session, char **service) { |
596 | return session_get_string(session, "SERVICE", service); | |
597 | } | |
eff40633 | 598 | |
51f58f08 LP |
599 | _public_ int sd_session_get_type(const char *session, char **type) { |
600 | return session_get_string(session, "TYPE", type); | |
601 | } | |
eff40633 | 602 | |
51f58f08 LP |
603 | _public_ int sd_session_get_class(const char *session, char **class) { |
604 | return session_get_string(session, "CLASS", class); | |
eff40633 LP |
605 | } |
606 | ||
c72d5456 DH |
607 | _public_ int sd_session_get_desktop(const char *session, char **desktop) { |
608 | _cleanup_free_ char *escaped = NULL; | |
609 | char *t; | |
610 | int r; | |
611 | ||
612 | assert_return(desktop, -EINVAL); | |
613 | ||
614 | r = session_get_string(session, "DESKTOP", &escaped); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
527b7a42 LP |
618 | r = cunescape(escaped, 0, &t); |
619 | if (r < 0) | |
620 | return r; | |
c72d5456 DH |
621 | |
622 | *desktop = t; | |
623 | return 0; | |
624 | } | |
625 | ||
fc8af9ff LP |
626 | _public_ int sd_session_get_display(const char *session, char **display) { |
627 | return session_get_string(session, "DISPLAY", display); | |
628 | } | |
629 | ||
5b04fe60 MM |
630 | _public_ int sd_session_get_remote_user(const char *session, char **remote_user) { |
631 | return session_get_string(session, "REMOTE_USER", remote_user); | |
632 | } | |
633 | ||
634 | _public_ int sd_session_get_remote_host(const char *session, char **remote_host) { | |
635 | return session_get_string(session, "REMOTE_HOST", remote_host); | |
636 | } | |
637 | ||
74b91131 | 638 | _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) { |
d70964d0 | 639 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
74b91131 LP |
640 | int r; |
641 | ||
1ae464e0 | 642 | assert_return(session || uid, -EINVAL); |
74b91131 | 643 | |
50b1678a LP |
644 | r = file_of_seat(seat, &p); |
645 | if (r < 0) | |
646 | return r; | |
74b91131 LP |
647 | |
648 | r = parse_env_file(p, NEWLINE, | |
649 | "ACTIVE", &s, | |
650 | "ACTIVE_UID", &t, | |
651 | NULL); | |
707b66c6 LP |
652 | if (r == -ENOENT) |
653 | return -ENXIO; | |
d70964d0 | 654 | if (r < 0) |
74b91131 | 655 | return r; |
74b91131 | 656 | |
d70964d0 | 657 | if (session && !s) |
4211d5bd | 658 | return -ENODATA; |
74b91131 | 659 | |
d70964d0 | 660 | if (uid && !t) |
4211d5bd | 661 | return -ENODATA; |
74b91131 LP |
662 | |
663 | if (uid && t) { | |
034a2a52 | 664 | r = parse_uid(t, uid); |
d70964d0 | 665 | if (r < 0) |
74b91131 | 666 | return r; |
74b91131 LP |
667 | } |
668 | ||
d70964d0 | 669 | if (session && s) { |
74b91131 | 670 | *session = s; |
d70964d0 HH |
671 | s = NULL; |
672 | } | |
74b91131 LP |
673 | |
674 | return 0; | |
675 | } | |
034a2a52 LP |
676 | |
677 | _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) { | |
d70964d0 HH |
678 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
679 | _cleanup_strv_free_ char **a = NULL; | |
680 | _cleanup_free_ uid_t *b = NULL; | |
034a2a52 LP |
681 | unsigned n = 0; |
682 | int r; | |
683 | ||
50b1678a LP |
684 | r = file_of_seat(seat, &p); |
685 | if (r < 0) | |
686 | return r; | |
034a2a52 LP |
687 | |
688 | r = parse_env_file(p, NEWLINE, | |
689 | "SESSIONS", &s, | |
690 | "ACTIVE_SESSIONS", &t, | |
691 | NULL); | |
707b66c6 LP |
692 | if (r == -ENOENT) |
693 | return -ENXIO; | |
d70964d0 | 694 | if (r < 0) |
034a2a52 | 695 | return r; |
034a2a52 | 696 | |
d60ef526 | 697 | if (s) { |
034a2a52 | 698 | a = strv_split(s, " "); |
d70964d0 | 699 | if (!a) |
034a2a52 | 700 | return -ENOMEM; |
034a2a52 LP |
701 | } |
702 | ||
034a2a52 | 703 | if (uids && t) { |
a2a5291b | 704 | const char *word, *state; |
034a2a52 | 705 | size_t l; |
034a2a52 | 706 | |
a2a5291b | 707 | FOREACH_WORD(word, l, t, state) |
034a2a52 LP |
708 | n++; |
709 | ||
d70964d0 | 710 | if (n > 0) { |
de3756ab | 711 | unsigned i = 0; |
034a2a52 | 712 | |
de3756ab | 713 | b = new(uid_t, n); |
d70964d0 | 714 | if (!b) |
034a2a52 | 715 | return -ENOMEM; |
034a2a52 | 716 | |
a2a5291b | 717 | FOREACH_WORD(word, l, t, state) { |
d70964d0 | 718 | _cleanup_free_ char *k = NULL; |
034a2a52 | 719 | |
a2a5291b | 720 | k = strndup(word, l); |
d70964d0 | 721 | if (!k) |
de3756ab | 722 | return -ENOMEM; |
de3756ab LP |
723 | |
724 | r = parse_uid(k, b + i); | |
de3756ab LP |
725 | if (r < 0) |
726 | continue; | |
727 | ||
728 | i++; | |
729 | } | |
034a2a52 LP |
730 | } |
731 | } | |
732 | ||
d60ef526 LP |
733 | r = strv_length(a); |
734 | ||
d70964d0 | 735 | if (sessions) { |
034a2a52 | 736 | *sessions = a; |
d70964d0 HH |
737 | a = NULL; |
738 | } | |
034a2a52 | 739 | |
d70964d0 | 740 | if (uids) { |
034a2a52 | 741 | *uids = b; |
d70964d0 HH |
742 | b = NULL; |
743 | } | |
034a2a52 LP |
744 | |
745 | if (n_uids) | |
746 | *n_uids = n; | |
747 | ||
d60ef526 | 748 | return r; |
034a2a52 LP |
749 | } |
750 | ||
20747498 | 751 | static int seat_get_can(const char *seat, const char *variable) { |
d70964d0 | 752 | _cleanup_free_ char *p = NULL, *s = NULL; |
add30678 LP |
753 | int r; |
754 | ||
707b66c6 | 755 | assert(variable); |
0325941f | 756 | |
50b1678a LP |
757 | r = file_of_seat(seat, &p); |
758 | if (r < 0) | |
759 | return r; | |
add30678 LP |
760 | |
761 | r = parse_env_file(p, NEWLINE, | |
20747498 | 762 | variable, &s, |
add30678 | 763 | NULL); |
707b66c6 LP |
764 | if (r == -ENOENT) |
765 | return -ENXIO; | |
d70964d0 | 766 | if (r < 0) |
add30678 | 767 | return r; |
707b66c6 LP |
768 | if (isempty(s)) |
769 | return -ENODATA; | |
add30678 | 770 | |
0325941f | 771 | return parse_boolean(s); |
add30678 LP |
772 | } |
773 | ||
20747498 LP |
774 | _public_ int sd_seat_can_multi_session(const char *seat) { |
775 | return seat_get_can(seat, "CAN_MULTI_SESSION"); | |
776 | } | |
777 | ||
778 | _public_ int sd_seat_can_tty(const char *seat) { | |
779 | return seat_get_can(seat, "CAN_TTY"); | |
780 | } | |
781 | ||
782 | _public_ int sd_seat_can_graphical(const char *seat) { | |
783 | return seat_get_can(seat, "CAN_GRAPHICAL"); | |
784 | } | |
785 | ||
034a2a52 | 786 | _public_ int sd_get_seats(char ***seats) { |
034a2a52 LP |
787 | return get_files_in_directory("/run/systemd/seats/", seats); |
788 | } | |
789 | ||
790 | _public_ int sd_get_sessions(char ***sessions) { | |
034a2a52 LP |
791 | return get_files_in_directory("/run/systemd/sessions/", sessions); |
792 | } | |
793 | ||
794 | _public_ int sd_get_uids(uid_t **users) { | |
d70964d0 | 795 | _cleanup_closedir_ DIR *d; |
034a2a52 LP |
796 | int r = 0; |
797 | unsigned n = 0; | |
d70964d0 | 798 | _cleanup_free_ uid_t *l = NULL; |
034a2a52 | 799 | |
034a2a52 | 800 | d = opendir("/run/systemd/users/"); |
8ea913b2 LP |
801 | if (!d) |
802 | return -errno; | |
803 | ||
034a2a52 | 804 | for (;;) { |
7d5e9c0f | 805 | struct dirent *de; |
034a2a52 LP |
806 | int k; |
807 | uid_t uid; | |
808 | ||
66c7a533 FW |
809 | errno = 0; |
810 | de = readdir(d); | |
811 | if (!de && errno != 0) | |
812 | return -errno; | |
034a2a52 LP |
813 | |
814 | if (!de) | |
815 | break; | |
816 | ||
817 | dirent_ensure_type(d, de); | |
818 | ||
819 | if (!dirent_is_file(de)) | |
820 | continue; | |
821 | ||
822 | k = parse_uid(de->d_name, &uid); | |
823 | if (k < 0) | |
824 | continue; | |
825 | ||
d60ef526 LP |
826 | if (users) { |
827 | if ((unsigned) r >= n) { | |
828 | uid_t *t; | |
034a2a52 | 829 | |
d60ef526 LP |
830 | n = MAX(16, 2*r); |
831 | t = realloc(l, sizeof(uid_t) * n); | |
d70964d0 HH |
832 | if (!t) |
833 | return -ENOMEM; | |
034a2a52 | 834 | |
d60ef526 LP |
835 | l = t; |
836 | } | |
034a2a52 | 837 | |
d60ef526 LP |
838 | assert((unsigned) r < n); |
839 | l[r++] = uid; | |
840 | } else | |
841 | r++; | |
034a2a52 LP |
842 | } |
843 | ||
d70964d0 HH |
844 | if (users) { |
845 | *users = l; | |
846 | l = NULL; | |
847 | } | |
034a2a52 LP |
848 | |
849 | return r; | |
850 | } | |
851 | ||
4d5fb962 | 852 | _public_ int sd_get_machine_names(char ***machines) { |
89f7c846 LP |
853 | char **l = NULL, **a, **b; |
854 | int r; | |
855 | ||
0325941f LP |
856 | assert_return(machines, -EINVAL); |
857 | ||
89f7c846 LP |
858 | r = get_files_in_directory("/run/systemd/machines/", &l); |
859 | if (r < 0) | |
860 | return r; | |
861 | ||
862 | if (l) { | |
863 | r = 0; | |
864 | ||
865 | /* Filter out the unit: symlinks */ | |
866 | for (a = l, b = l; *a; a++) { | |
b9a8d250 | 867 | if (startswith(*a, "unit:") || !machine_name_is_valid(*a)) |
89f7c846 LP |
868 | free(*a); |
869 | else { | |
870 | *b = *a; | |
871 | b++; | |
872 | r++; | |
873 | } | |
874 | } | |
875 | ||
876 | *b = NULL; | |
877 | } | |
878 | ||
879 | *machines = l; | |
880 | return r; | |
a20affe2 LP |
881 | } |
882 | ||
0325941f LP |
883 | _public_ int sd_machine_get_class(const char *machine, char **class) { |
884 | _cleanup_free_ char *c = NULL; | |
885 | const char *p; | |
886 | int r; | |
887 | ||
620a687c | 888 | assert_return(machine_name_is_valid(machine), -EINVAL); |
0325941f LP |
889 | assert_return(class, -EINVAL); |
890 | ||
63c372cb | 891 | p = strjoina("/run/systemd/machines/", machine); |
0325941f | 892 | r = parse_env_file(p, NEWLINE, "CLASS", &c, NULL); |
707b66c6 LP |
893 | if (r == -ENOENT) |
894 | return -ENXIO; | |
0325941f LP |
895 | if (r < 0) |
896 | return r; | |
897 | if (!c) | |
898 | return -EIO; | |
899 | ||
900 | *class = c; | |
901 | c = NULL; | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
634af566 | 906 | _public_ int sd_machine_get_ifindices(const char *machine, int **ifindices) { |
cabb0bc6 LP |
907 | _cleanup_free_ char *netif = NULL; |
908 | size_t l, allocated = 0, nr = 0; | |
cabb0bc6 | 909 | int *ni = NULL; |
a2a5291b | 910 | const char *p, *word, *state; |
cabb0bc6 LP |
911 | int r; |
912 | ||
913 | assert_return(machine_name_is_valid(machine), -EINVAL); | |
634af566 | 914 | assert_return(ifindices, -EINVAL); |
cabb0bc6 | 915 | |
63c372cb | 916 | p = strjoina("/run/systemd/machines/", machine); |
cabb0bc6 | 917 | r = parse_env_file(p, NEWLINE, "NETIF", &netif, NULL); |
707b66c6 LP |
918 | if (r == -ENOENT) |
919 | return -ENXIO; | |
cabb0bc6 LP |
920 | if (r < 0) |
921 | return r; | |
922 | if (!netif) { | |
634af566 | 923 | *ifindices = NULL; |
cabb0bc6 LP |
924 | return 0; |
925 | } | |
926 | ||
a2a5291b | 927 | FOREACH_WORD(word, l, netif, state) { |
cabb0bc6 LP |
928 | char buf[l+1]; |
929 | int ifi; | |
930 | ||
a2a5291b | 931 | *(char*) (mempcpy(buf, word, l)) = 0; |
cabb0bc6 LP |
932 | |
933 | if (safe_atoi(buf, &ifi) < 0) | |
934 | continue; | |
935 | if (ifi <= 0) | |
936 | continue; | |
937 | ||
938 | if (!GREEDY_REALLOC(ni, allocated, nr+1)) { | |
939 | free(ni); | |
940 | return -ENOMEM; | |
941 | } | |
942 | ||
943 | ni[nr++] = ifi; | |
944 | } | |
945 | ||
634af566 | 946 | *ifindices = ni; |
cabb0bc6 LP |
947 | return nr; |
948 | } | |
949 | ||
034a2a52 LP |
950 | static inline int MONITOR_TO_FD(sd_login_monitor *m) { |
951 | return (int) (unsigned long) m - 1; | |
952 | } | |
953 | ||
954 | static inline sd_login_monitor* FD_TO_MONITOR(int fd) { | |
955 | return (sd_login_monitor*) (unsigned long) (fd + 1); | |
956 | } | |
957 | ||
958 | _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) { | |
034a2a52 LP |
959 | int fd, k; |
960 | bool good = false; | |
961 | ||
1ae464e0 | 962 | assert_return(m, -EINVAL); |
034a2a52 LP |
963 | |
964 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
965 | if (fd < 0) | |
bcb161b0 | 966 | return -errno; |
034a2a52 LP |
967 | |
968 | if (!category || streq(category, "seat")) { | |
969 | k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE); | |
970 | if (k < 0) { | |
03e334a1 | 971 | safe_close(fd); |
034a2a52 LP |
972 | return -errno; |
973 | } | |
974 | ||
975 | good = true; | |
976 | } | |
977 | ||
978 | if (!category || streq(category, "session")) { | |
979 | k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE); | |
980 | if (k < 0) { | |
03e334a1 | 981 | safe_close(fd); |
034a2a52 LP |
982 | return -errno; |
983 | } | |
984 | ||
985 | good = true; | |
986 | } | |
987 | ||
988 | if (!category || streq(category, "uid")) { | |
989 | k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE); | |
990 | if (k < 0) { | |
03e334a1 | 991 | safe_close(fd); |
034a2a52 LP |
992 | return -errno; |
993 | } | |
994 | ||
995 | good = true; | |
996 | } | |
997 | ||
e10375f2 | 998 | if (!category || streq(category, "machine")) { |
ba73ed85 | 999 | k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE); |
e10375f2 | 1000 | if (k < 0) { |
03e334a1 | 1001 | safe_close(fd); |
e10375f2 LP |
1002 | return -errno; |
1003 | } | |
1004 | ||
1005 | good = true; | |
1006 | } | |
1007 | ||
034a2a52 LP |
1008 | if (!good) { |
1009 | close_nointr(fd); | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
1013 | *m = FD_TO_MONITOR(fd); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { | |
1018 | int fd; | |
1019 | ||
1ae464e0 | 1020 | assert_return(m, NULL); |
034a2a52 LP |
1021 | |
1022 | fd = MONITOR_TO_FD(m); | |
1023 | close_nointr(fd); | |
1024 | ||
1025 | return NULL; | |
1026 | } | |
1027 | ||
1028 | _public_ int sd_login_monitor_flush(sd_login_monitor *m) { | |
1029 | ||
1ae464e0 | 1030 | assert_return(m, -EINVAL); |
034a2a52 LP |
1031 | |
1032 | return flush_fd(MONITOR_TO_FD(m)); | |
1033 | } | |
1034 | ||
1035 | _public_ int sd_login_monitor_get_fd(sd_login_monitor *m) { | |
1036 | ||
1ae464e0 | 1037 | assert_return(m, -EINVAL); |
034a2a52 LP |
1038 | |
1039 | return MONITOR_TO_FD(m); | |
1040 | } | |
dace83cb LP |
1041 | |
1042 | _public_ int sd_login_monitor_get_events(sd_login_monitor *m) { | |
1043 | ||
1ae464e0 | 1044 | assert_return(m, -EINVAL); |
dace83cb | 1045 | |
667c24a6 LP |
1046 | /* For now we will only return POLLIN here, since we don't |
1047 | * need anything else ever for inotify. However, let's have | |
1048 | * this API to keep our options open should we later on need | |
1049 | * it. */ | |
dace83cb LP |
1050 | return POLLIN; |
1051 | } | |
667c24a6 LP |
1052 | |
1053 | _public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) { | |
1054 | ||
1ae464e0 TA |
1055 | assert_return(m, -EINVAL); |
1056 | assert_return(timeout_usec, -EINVAL); | |
667c24a6 LP |
1057 | |
1058 | /* For now we will only return (uint64_t) -1, since we don't | |
1059 | * need any timeout. However, let's have this API to keep our | |
1060 | * options open should we later on need it. */ | |
1061 | *timeout_usec = (uint64_t) -1; | |
1062 | return 0; | |
1063 | } |