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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
74b91131 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
74b91131 LP |
6 | ***/ |
7 | ||
74b91131 | 8 | #include <errno.h> |
0a6f50c0 | 9 | #include <poll.h> |
4f5dd394 LP |
10 | #include <string.h> |
11 | #include <sys/inotify.h> | |
12 | #include <unistd.h> | |
74b91131 | 13 | |
07630cea LP |
14 | #include "sd-login.h" |
15 | ||
b5efdb8a | 16 | #include "alloc-util.h" |
74b91131 | 17 | #include "cgroup-util.h" |
f4f15635 | 18 | #include "dirent-util.h" |
4f5dd394 | 19 | #include "escape.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
a5c32cff | 21 | #include "fileio.h" |
f97b34a6 | 22 | #include "format-util.h" |
f4f15635 | 23 | #include "fs-util.h" |
25300b5a | 24 | #include "hostname-util.h" |
c004493c | 25 | #include "io-util.h" |
4f5dd394 LP |
26 | #include "login-util.h" |
27 | #include "macro.h" | |
6bedfcbb | 28 | #include "parse-util.h" |
bb15fafe | 29 | #include "path-util.h" |
2583fbea | 30 | #include "socket-util.h" |
07630cea | 31 | #include "string-util.h" |
4f5dd394 | 32 | #include "strv.h" |
b1d4f8e1 | 33 | #include "user-util.h" |
4f5dd394 | 34 | #include "util.h" |
74b91131 | 35 | |
707b66c6 LP |
36 | /* Error codes: |
37 | * | |
38 | * invalid input parameters → -EINVAL | |
39 | * invalid fd → -EBADF | |
40 | * process does not exist → -ESRCH | |
41 | * cgroup does not exist → -ENOENT | |
42 | * machine, session does not exist → -ENXIO | |
43 | * requested metadata on object is missing → -ENODATA | |
44 | */ | |
45 | ||
034a2a52 | 46 | _public_ int sd_pid_get_session(pid_t pid, char **session) { |
19d64d10 | 47 | int r; |
ba1261bc | 48 | |
1ae464e0 TA |
49 | assert_return(pid >= 0, -EINVAL); |
50 | assert_return(session, -EINVAL); | |
034a2a52 | 51 | |
19d64d10 | 52 | r = cg_pid_get_session(pid, session); |
bc9e9af1 | 53 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
74b91131 LP |
54 | } |
55 | ||
94fb446e | 56 | _public_ int sd_pid_get_unit(pid_t pid, char **unit) { |
171f8f59 | 57 | int r; |
9847946e | 58 | |
1ae464e0 TA |
59 | assert_return(pid >= 0, -EINVAL); |
60 | assert_return(unit, -EINVAL); | |
9847946e | 61 | |
171f8f59 | 62 | r = cg_pid_get_unit(pid, unit); |
bc9e9af1 | 63 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
9847946e LP |
64 | } |
65 | ||
97e13058 | 66 | _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { |
d440fb97 | 67 | int r; |
97e13058 | 68 | |
1ae464e0 TA |
69 | assert_return(pid >= 0, -EINVAL); |
70 | assert_return(unit, -EINVAL); | |
97e13058 | 71 | |
d440fb97 | 72 | r = cg_pid_get_user_unit(pid, unit); |
bc9e9af1 | 73 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
97e13058 LP |
74 | } |
75 | ||
7027ff61 | 76 | _public_ int sd_pid_get_machine_name(pid_t pid, char **name) { |
bc9e9af1 | 77 | int r; |
7027ff61 | 78 | |
1ae464e0 TA |
79 | assert_return(pid >= 0, -EINVAL); |
80 | assert_return(name, -EINVAL); | |
7027ff61 | 81 | |
bc9e9af1 ZJS |
82 | r = cg_pid_get_machine_name(pid, name); |
83 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
7027ff61 LP |
84 | } |
85 | ||
1021b21b | 86 | _public_ int sd_pid_get_slice(pid_t pid, char **slice) { |
bc9e9af1 | 87 | int r; |
1021b21b | 88 | |
1ae464e0 TA |
89 | assert_return(pid >= 0, -EINVAL); |
90 | assert_return(slice, -EINVAL); | |
1021b21b | 91 | |
bc9e9af1 ZJS |
92 | r = cg_pid_get_slice(pid, slice); |
93 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
1021b21b LP |
94 | } |
95 | ||
329ac4bc | 96 | _public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { |
bc9e9af1 | 97 | int r; |
329ac4bc LP |
98 | |
99 | assert_return(pid >= 0, -EINVAL); | |
100 | assert_return(slice, -EINVAL); | |
101 | ||
bc9e9af1 ZJS |
102 | r = cg_pid_get_user_slice(pid, slice); |
103 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
329ac4bc LP |
104 | } |
105 | ||
034a2a52 | 106 | _public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { |
bc9e9af1 | 107 | int r; |
034a2a52 | 108 | |
1ae464e0 TA |
109 | assert_return(pid >= 0, -EINVAL); |
110 | assert_return(uid, -EINVAL); | |
034a2a52 | 111 | |
bc9e9af1 ZJS |
112 | r = cg_pid_get_owner_uid(pid, uid); |
113 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
034a2a52 LP |
114 | } |
115 | ||
f5aaf575 LP |
116 | _public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) { |
117 | char *c; | |
118 | int r; | |
119 | ||
120 | assert_return(pid >= 0, -EINVAL); | |
121 | assert_return(cgroup, -EINVAL); | |
122 | ||
123 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c); | |
124 | if (r < 0) | |
125 | return r; | |
126 | ||
127 | /* The internal APIs return the empty string for the root | |
128 | * cgroup, let's return the "/" in the public APIs instead, as | |
595bfe7d | 129 | * that's easier and less ambiguous for people to grok. */ |
f5aaf575 LP |
130 | if (isempty(c)) { |
131 | free(c); | |
132 | c = strdup("/"); | |
133 | if (!c) | |
134 | return -ENOMEM; | |
135 | ||
136 | } | |
137 | ||
138 | *cgroup = c; | |
139 | return 0; | |
140 | } | |
141 | ||
bf34ab14 | 142 | _public_ int sd_peer_get_session(int fd, char **session) { |
a7f7d1bd | 143 | struct ucred ucred = {}; |
bf34ab14 LP |
144 | int r; |
145 | ||
8ac43fee | 146 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
147 | assert_return(session, -EINVAL); |
148 | ||
149 | r = getpeercred(fd, &ucred); | |
150 | if (r < 0) | |
151 | return r; | |
152 | ||
153 | return cg_pid_get_session(ucred.pid, session); | |
154 | } | |
155 | ||
156 | _public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) { | |
157 | struct ucred ucred; | |
158 | int r; | |
159 | ||
8ac43fee | 160 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
161 | assert_return(uid, -EINVAL); |
162 | ||
163 | r = getpeercred(fd, &ucred); | |
164 | if (r < 0) | |
165 | return r; | |
166 | ||
167 | return cg_pid_get_owner_uid(ucred.pid, uid); | |
168 | } | |
169 | ||
170 | _public_ int sd_peer_get_unit(int fd, char **unit) { | |
171 | struct ucred ucred; | |
172 | int r; | |
173 | ||
8ac43fee | 174 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
175 | assert_return(unit, -EINVAL); |
176 | ||
177 | r = getpeercred(fd, &ucred); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | return cg_pid_get_unit(ucred.pid, unit); | |
182 | } | |
183 | ||
184 | _public_ int sd_peer_get_user_unit(int fd, char **unit) { | |
185 | struct ucred ucred; | |
186 | int r; | |
187 | ||
8ac43fee | 188 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
189 | assert_return(unit, -EINVAL); |
190 | ||
191 | r = getpeercred(fd, &ucred); | |
192 | if (r < 0) | |
193 | return r; | |
194 | ||
195 | return cg_pid_get_user_unit(ucred.pid, unit); | |
196 | } | |
197 | ||
198 | _public_ int sd_peer_get_machine_name(int fd, char **machine) { | |
199 | struct ucred ucred; | |
200 | int r; | |
201 | ||
8ac43fee | 202 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
203 | assert_return(machine, -EINVAL); |
204 | ||
205 | r = getpeercred(fd, &ucred); | |
206 | if (r < 0) | |
207 | return r; | |
208 | ||
209 | return cg_pid_get_machine_name(ucred.pid, machine); | |
210 | } | |
211 | ||
212 | _public_ int sd_peer_get_slice(int fd, char **slice) { | |
213 | struct ucred ucred; | |
214 | int r; | |
215 | ||
8ac43fee | 216 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
217 | assert_return(slice, -EINVAL); |
218 | ||
219 | r = getpeercred(fd, &ucred); | |
220 | if (r < 0) | |
221 | return r; | |
222 | ||
223 | return cg_pid_get_slice(ucred.pid, slice); | |
224 | } | |
225 | ||
329ac4bc LP |
226 | _public_ int sd_peer_get_user_slice(int fd, char **slice) { |
227 | struct ucred ucred; | |
228 | int r; | |
229 | ||
8ac43fee | 230 | assert_return(fd >= 0, -EBADF); |
329ac4bc LP |
231 | assert_return(slice, -EINVAL); |
232 | ||
233 | r = getpeercred(fd, &ucred); | |
234 | if (r < 0) | |
235 | return r; | |
236 | ||
237 | return cg_pid_get_user_slice(ucred.pid, slice); | |
238 | } | |
239 | ||
f5aaf575 LP |
240 | _public_ int sd_peer_get_cgroup(int fd, char **cgroup) { |
241 | struct ucred ucred; | |
242 | int r; | |
243 | ||
244 | assert_return(fd >= 0, -EBADF); | |
245 | assert_return(cgroup, -EINVAL); | |
246 | ||
247 | r = getpeercred(fd, &ucred); | |
248 | if (r < 0) | |
249 | return r; | |
250 | ||
251 | return sd_pid_get_cgroup(ucred.pid, cgroup); | |
252 | } | |
253 | ||
a077b666 | 254 | static int file_of_uid(uid_t uid, char **p) { |
707b66c6 LP |
255 | |
256 | assert_return(uid_is_valid(uid), -EINVAL); | |
a077b666 LP |
257 | assert(p); |
258 | ||
259 | if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0) | |
260 | return -ENOMEM; | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
74b91131 | 265 | _public_ int sd_uid_get_state(uid_t uid, char**state) { |
bf34ab14 LP |
266 | _cleanup_free_ char *p = NULL; |
267 | char *s = NULL; | |
74b91131 LP |
268 | int r; |
269 | ||
1ae464e0 | 270 | assert_return(state, -EINVAL); |
74b91131 | 271 | |
a077b666 LP |
272 | r = file_of_uid(uid, &p); |
273 | if (r < 0) | |
274 | return r; | |
74b91131 LP |
275 | |
276 | r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); | |
74b91131 LP |
277 | if (r == -ENOENT) { |
278 | free(s); | |
279 | s = strdup("offline"); | |
280 | if (!s) | |
281 | return -ENOMEM; | |
282 | ||
707b66c6 | 283 | } |
4c4bc546 | 284 | else if (r < 0) { |
74b91131 LP |
285 | free(s); |
286 | return r; | |
707b66c6 LP |
287 | } |
288 | if (isempty(s)) { | |
289 | free(s); | |
74b91131 | 290 | return -EIO; |
707b66c6 | 291 | } |
74b91131 LP |
292 | |
293 | *state = s; | |
294 | return 0; | |
295 | } | |
296 | ||
a077b666 LP |
297 | _public_ int sd_uid_get_display(uid_t uid, char **session) { |
298 | _cleanup_free_ char *p = NULL, *s = NULL; | |
299 | int r; | |
300 | ||
301 | assert_return(session, -EINVAL); | |
302 | ||
303 | r = file_of_uid(uid, &p); | |
304 | if (r < 0) | |
305 | return r; | |
306 | ||
307 | r = parse_env_file(p, NEWLINE, "DISPLAY", &s, NULL); | |
fc60d815 | 308 | if (r == -ENOENT) |
707b66c6 | 309 | return -ENODATA; |
a077b666 LP |
310 | if (r < 0) |
311 | return r; | |
a077b666 | 312 | if (isempty(s)) |
707b66c6 | 313 | return -ENODATA; |
a077b666 | 314 | |
ae2a15bc | 315 | *session = TAKE_PTR(s); |
a077b666 LP |
316 | |
317 | return 0; | |
318 | } | |
319 | ||
707b66c6 LP |
320 | static int file_of_seat(const char *seat, char **_p) { |
321 | char *p; | |
322 | int r; | |
323 | ||
324 | assert(_p); | |
325 | ||
326 | if (seat) { | |
327 | if (!filename_is_valid(seat)) | |
328 | return -EINVAL; | |
329 | ||
330 | p = strappend("/run/systemd/seats/", seat); | |
331 | } else { | |
332 | _cleanup_free_ char *buf = NULL; | |
333 | ||
334 | r = sd_session_get_seat(NULL, &buf); | |
335 | if (r < 0) | |
336 | return r; | |
337 | ||
338 | p = strappend("/run/systemd/seats/", buf); | |
339 | } | |
340 | ||
341 | if (!p) | |
342 | return -ENOMEM; | |
343 | ||
ae2a15bc | 344 | *_p = TAKE_PTR(p); |
707b66c6 LP |
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 | 404 | strv_uniq(a); |
da6053d0 | 405 | r = (int) strv_length(a); |
d60ef526 LP |
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 | ||
ae2a15bc | 517 | *state = TAKE_PTR(s); |
d70964d0 | 518 | |
0604381b LP |
519 | return 0; |
520 | } | |
521 | ||
74b91131 LP |
522 | _public_ int sd_session_get_uid(const char *session, uid_t *uid) { |
523 | int r; | |
d70964d0 | 524 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 | 525 | |
1ae464e0 | 526 | assert_return(uid, -EINVAL); |
74b91131 | 527 | |
50b1678a LP |
528 | r = file_of_session(session, &p); |
529 | if (r < 0) | |
530 | return r; | |
74b91131 LP |
531 | |
532 | r = parse_env_file(p, NEWLINE, "UID", &s, NULL); | |
707b66c6 LP |
533 | if (r == -ENOENT) |
534 | return -ENXIO; | |
d70964d0 | 535 | if (r < 0) |
74b91131 | 536 | return r; |
707b66c6 | 537 | if (isempty(s)) |
74b91131 LP |
538 | return -EIO; |
539 | ||
0325941f | 540 | return parse_uid(s, uid); |
74b91131 LP |
541 | } |
542 | ||
51f58f08 | 543 | static int session_get_string(const char *session, const char *field, char **value) { |
d70964d0 | 544 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 LP |
545 | int r; |
546 | ||
1ae464e0 | 547 | assert_return(value, -EINVAL); |
707b66c6 | 548 | assert(field); |
74b91131 | 549 | |
50b1678a LP |
550 | r = file_of_session(session, &p); |
551 | if (r < 0) | |
552 | return r; | |
74b91131 | 553 | |
51f58f08 | 554 | r = parse_env_file(p, NEWLINE, field, &s, NULL); |
707b66c6 LP |
555 | if (r == -ENOENT) |
556 | return -ENXIO; | |
d70964d0 | 557 | if (r < 0) |
74b91131 | 558 | return r; |
74b91131 | 559 | if (isempty(s)) |
707b66c6 | 560 | return -ENODATA; |
74b91131 | 561 | |
ae2a15bc | 562 | *value = TAKE_PTR(s); |
74b91131 LP |
563 | return 0; |
564 | } | |
565 | ||
51f58f08 LP |
566 | _public_ int sd_session_get_seat(const char *session, char **seat) { |
567 | return session_get_string(session, "SEAT", seat); | |
568 | } | |
eff40633 | 569 | |
c84f5e4a LP |
570 | _public_ int sd_session_get_tty(const char *session, char **tty) { |
571 | return session_get_string(session, "TTY", tty); | |
572 | } | |
573 | ||
44ded3ab | 574 | _public_ int sd_session_get_vt(const char *session, unsigned *vtnr) { |
3f4fee03 | 575 | _cleanup_free_ char *vtnr_string = NULL; |
44ded3ab GC |
576 | unsigned u; |
577 | int r; | |
578 | ||
707b66c6 LP |
579 | assert_return(vtnr, -EINVAL); |
580 | ||
0581dac2 | 581 | r = session_get_string(session, "VTNR", &vtnr_string); |
44ded3ab GC |
582 | if (r < 0) |
583 | return r; | |
584 | ||
585 | r = safe_atou(vtnr_string, &u); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
589 | *vtnr = u; | |
590 | return 0; | |
591 | } | |
592 | ||
51f58f08 LP |
593 | _public_ int sd_session_get_service(const char *session, char **service) { |
594 | return session_get_string(session, "SERVICE", service); | |
595 | } | |
eff40633 | 596 | |
51f58f08 LP |
597 | _public_ int sd_session_get_type(const char *session, char **type) { |
598 | return session_get_string(session, "TYPE", type); | |
599 | } | |
eff40633 | 600 | |
51f58f08 LP |
601 | _public_ int sd_session_get_class(const char *session, char **class) { |
602 | return session_get_string(session, "CLASS", class); | |
eff40633 LP |
603 | } |
604 | ||
c72d5456 DH |
605 | _public_ int sd_session_get_desktop(const char *session, char **desktop) { |
606 | _cleanup_free_ char *escaped = NULL; | |
607 | char *t; | |
608 | int r; | |
609 | ||
610 | assert_return(desktop, -EINVAL); | |
611 | ||
612 | r = session_get_string(session, "DESKTOP", &escaped); | |
613 | if (r < 0) | |
614 | return r; | |
615 | ||
527b7a42 LP |
616 | r = cunescape(escaped, 0, &t); |
617 | if (r < 0) | |
618 | return r; | |
c72d5456 DH |
619 | |
620 | *desktop = t; | |
621 | return 0; | |
622 | } | |
623 | ||
fc8af9ff LP |
624 | _public_ int sd_session_get_display(const char *session, char **display) { |
625 | return session_get_string(session, "DISPLAY", display); | |
626 | } | |
627 | ||
5b04fe60 MM |
628 | _public_ int sd_session_get_remote_user(const char *session, char **remote_user) { |
629 | return session_get_string(session, "REMOTE_USER", remote_user); | |
630 | } | |
631 | ||
632 | _public_ int sd_session_get_remote_host(const char *session, char **remote_host) { | |
633 | return session_get_string(session, "REMOTE_HOST", remote_host); | |
634 | } | |
635 | ||
74b91131 | 636 | _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) { |
d70964d0 | 637 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
74b91131 LP |
638 | int r; |
639 | ||
1ae464e0 | 640 | assert_return(session || uid, -EINVAL); |
74b91131 | 641 | |
50b1678a LP |
642 | r = file_of_seat(seat, &p); |
643 | if (r < 0) | |
644 | return r; | |
74b91131 LP |
645 | |
646 | r = parse_env_file(p, NEWLINE, | |
647 | "ACTIVE", &s, | |
648 | "ACTIVE_UID", &t, | |
649 | NULL); | |
707b66c6 LP |
650 | if (r == -ENOENT) |
651 | return -ENXIO; | |
d70964d0 | 652 | if (r < 0) |
74b91131 | 653 | return r; |
74b91131 | 654 | |
d70964d0 | 655 | if (session && !s) |
4211d5bd | 656 | return -ENODATA; |
74b91131 | 657 | |
d70964d0 | 658 | if (uid && !t) |
4211d5bd | 659 | return -ENODATA; |
74b91131 LP |
660 | |
661 | if (uid && t) { | |
034a2a52 | 662 | r = parse_uid(t, uid); |
d70964d0 | 663 | if (r < 0) |
74b91131 | 664 | return r; |
74b91131 LP |
665 | } |
666 | ||
ae2a15bc LP |
667 | if (session && s) |
668 | *session = TAKE_PTR(s); | |
74b91131 LP |
669 | |
670 | return 0; | |
671 | } | |
034a2a52 LP |
672 | |
673 | _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) { | |
d70964d0 HH |
674 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
675 | _cleanup_strv_free_ char **a = NULL; | |
676 | _cleanup_free_ uid_t *b = NULL; | |
034a2a52 LP |
677 | unsigned n = 0; |
678 | int r; | |
679 | ||
50b1678a LP |
680 | r = file_of_seat(seat, &p); |
681 | if (r < 0) | |
682 | return r; | |
034a2a52 LP |
683 | |
684 | r = parse_env_file(p, NEWLINE, | |
685 | "SESSIONS", &s, | |
d3cfab31 | 686 | "UIDS", &t, |
034a2a52 | 687 | NULL); |
707b66c6 LP |
688 | if (r == -ENOENT) |
689 | return -ENXIO; | |
d70964d0 | 690 | if (r < 0) |
034a2a52 | 691 | return r; |
034a2a52 | 692 | |
d60ef526 | 693 | if (s) { |
034a2a52 | 694 | a = strv_split(s, " "); |
d70964d0 | 695 | if (!a) |
034a2a52 | 696 | return -ENOMEM; |
034a2a52 LP |
697 | } |
698 | ||
034a2a52 | 699 | if (uids && t) { |
a2a5291b | 700 | const char *word, *state; |
034a2a52 | 701 | size_t l; |
034a2a52 | 702 | |
a2a5291b | 703 | FOREACH_WORD(word, l, t, state) |
034a2a52 LP |
704 | n++; |
705 | ||
d70964d0 | 706 | if (n > 0) { |
de3756ab | 707 | unsigned i = 0; |
034a2a52 | 708 | |
de3756ab | 709 | b = new(uid_t, n); |
d70964d0 | 710 | if (!b) |
034a2a52 | 711 | return -ENOMEM; |
034a2a52 | 712 | |
a2a5291b | 713 | FOREACH_WORD(word, l, t, state) { |
d70964d0 | 714 | _cleanup_free_ char *k = NULL; |
034a2a52 | 715 | |
a2a5291b | 716 | k = strndup(word, l); |
d70964d0 | 717 | if (!k) |
de3756ab | 718 | return -ENOMEM; |
de3756ab LP |
719 | |
720 | r = parse_uid(k, b + i); | |
de3756ab | 721 | if (r < 0) |
cc6182e8 | 722 | return r; |
de3756ab LP |
723 | |
724 | i++; | |
725 | } | |
034a2a52 LP |
726 | } |
727 | } | |
728 | ||
da6053d0 | 729 | r = (int) strv_length(a); |
d60ef526 | 730 | |
1cc6c93a YW |
731 | if (sessions) |
732 | *sessions = TAKE_PTR(a); | |
034a2a52 | 733 | |
1cc6c93a YW |
734 | if (uids) |
735 | *uids = TAKE_PTR(b); | |
034a2a52 LP |
736 | |
737 | if (n_uids) | |
738 | *n_uids = n; | |
739 | ||
d60ef526 | 740 | return r; |
034a2a52 LP |
741 | } |
742 | ||
20747498 | 743 | static int seat_get_can(const char *seat, const char *variable) { |
d70964d0 | 744 | _cleanup_free_ char *p = NULL, *s = NULL; |
add30678 LP |
745 | int r; |
746 | ||
707b66c6 | 747 | assert(variable); |
0325941f | 748 | |
50b1678a LP |
749 | r = file_of_seat(seat, &p); |
750 | if (r < 0) | |
751 | return r; | |
add30678 LP |
752 | |
753 | r = parse_env_file(p, NEWLINE, | |
20747498 | 754 | variable, &s, |
add30678 | 755 | NULL); |
707b66c6 LP |
756 | if (r == -ENOENT) |
757 | return -ENXIO; | |
d70964d0 | 758 | if (r < 0) |
add30678 | 759 | return r; |
707b66c6 LP |
760 | if (isempty(s)) |
761 | return -ENODATA; | |
add30678 | 762 | |
0325941f | 763 | return parse_boolean(s); |
add30678 LP |
764 | } |
765 | ||
20747498 LP |
766 | _public_ int sd_seat_can_multi_session(const char *seat) { |
767 | return seat_get_can(seat, "CAN_MULTI_SESSION"); | |
768 | } | |
769 | ||
770 | _public_ int sd_seat_can_tty(const char *seat) { | |
771 | return seat_get_can(seat, "CAN_TTY"); | |
772 | } | |
773 | ||
774 | _public_ int sd_seat_can_graphical(const char *seat) { | |
775 | return seat_get_can(seat, "CAN_GRAPHICAL"); | |
776 | } | |
777 | ||
034a2a52 | 778 | _public_ int sd_get_seats(char ***seats) { |
2b5e9267 YW |
779 | int r; |
780 | ||
781 | r = get_files_in_directory("/run/systemd/seats/", seats); | |
782 | if (r == -ENOENT) { | |
783 | if (seats) | |
784 | *seats = NULL; | |
785 | return 0; | |
786 | } | |
787 | return r; | |
034a2a52 LP |
788 | } |
789 | ||
790 | _public_ int sd_get_sessions(char ***sessions) { | |
2b5e9267 YW |
791 | int r; |
792 | ||
793 | r = get_files_in_directory("/run/systemd/sessions/", sessions); | |
794 | if (r == -ENOENT) { | |
795 | if (sessions) | |
796 | *sessions = NULL; | |
797 | return 0; | |
798 | } | |
799 | return r; | |
034a2a52 LP |
800 | } |
801 | ||
802 | _public_ int sd_get_uids(uid_t **users) { | |
d70964d0 | 803 | _cleanup_closedir_ DIR *d; |
8fb3f009 | 804 | struct dirent *de; |
034a2a52 LP |
805 | int r = 0; |
806 | unsigned n = 0; | |
d70964d0 | 807 | _cleanup_free_ uid_t *l = NULL; |
034a2a52 | 808 | |
034a2a52 | 809 | d = opendir("/run/systemd/users/"); |
2b5e9267 YW |
810 | if (!d) { |
811 | if (errno == ENOENT) { | |
812 | if (users) | |
813 | *users = NULL; | |
814 | return 0; | |
815 | } | |
8ea913b2 | 816 | return -errno; |
2b5e9267 | 817 | } |
8ea913b2 | 818 | |
8fb3f009 | 819 | FOREACH_DIRENT_ALL(de, d, return -errno) { |
034a2a52 LP |
820 | int k; |
821 | uid_t uid; | |
822 | ||
034a2a52 LP |
823 | dirent_ensure_type(d, de); |
824 | ||
825 | if (!dirent_is_file(de)) | |
826 | continue; | |
827 | ||
828 | k = parse_uid(de->d_name, &uid); | |
829 | if (k < 0) | |
830 | continue; | |
831 | ||
d60ef526 LP |
832 | if (users) { |
833 | if ((unsigned) r >= n) { | |
834 | uid_t *t; | |
034a2a52 | 835 | |
d60ef526 LP |
836 | n = MAX(16, 2*r); |
837 | t = realloc(l, sizeof(uid_t) * n); | |
d70964d0 HH |
838 | if (!t) |
839 | return -ENOMEM; | |
034a2a52 | 840 | |
d60ef526 LP |
841 | l = t; |
842 | } | |
034a2a52 | 843 | |
d60ef526 LP |
844 | assert((unsigned) r < n); |
845 | l[r++] = uid; | |
846 | } else | |
847 | r++; | |
034a2a52 LP |
848 | } |
849 | ||
1cc6c93a YW |
850 | if (users) |
851 | *users = TAKE_PTR(l); | |
034a2a52 LP |
852 | |
853 | return r; | |
854 | } | |
855 | ||
4d5fb962 | 856 | _public_ int sd_get_machine_names(char ***machines) { |
96480634 ZJS |
857 | _cleanup_strv_free_ char **l = NULL; |
858 | char **a, **b; | |
89f7c846 LP |
859 | int r; |
860 | ||
861 | r = get_files_in_directory("/run/systemd/machines/", &l); | |
0543105b | 862 | if (r == -ENOENT) { |
76ed21e1 YW |
863 | if (machines) |
864 | *machines = NULL; | |
0543105b ZJS |
865 | return 0; |
866 | } | |
89f7c846 LP |
867 | if (r < 0) |
868 | return r; | |
869 | ||
870 | if (l) { | |
871 | r = 0; | |
872 | ||
873 | /* Filter out the unit: symlinks */ | |
76ed21e1 | 874 | for (a = b = l; *a; a++) { |
b9a8d250 | 875 | if (startswith(*a, "unit:") || !machine_name_is_valid(*a)) |
89f7c846 LP |
876 | free(*a); |
877 | else { | |
878 | *b = *a; | |
879 | b++; | |
880 | r++; | |
881 | } | |
882 | } | |
883 | ||
884 | *b = NULL; | |
885 | } | |
886 | ||
ae2a15bc LP |
887 | if (machines) |
888 | *machines = TAKE_PTR(l); | |
889 | ||
89f7c846 | 890 | return r; |
a20affe2 LP |
891 | } |
892 | ||
0325941f LP |
893 | _public_ int sd_machine_get_class(const char *machine, char **class) { |
894 | _cleanup_free_ char *c = NULL; | |
895 | const char *p; | |
896 | int r; | |
897 | ||
620a687c | 898 | assert_return(machine_name_is_valid(machine), -EINVAL); |
0325941f LP |
899 | assert_return(class, -EINVAL); |
900 | ||
63c372cb | 901 | p = strjoina("/run/systemd/machines/", machine); |
0325941f | 902 | r = parse_env_file(p, NEWLINE, "CLASS", &c, NULL); |
707b66c6 LP |
903 | if (r == -ENOENT) |
904 | return -ENXIO; | |
0325941f LP |
905 | if (r < 0) |
906 | return r; | |
907 | if (!c) | |
908 | return -EIO; | |
909 | ||
ae2a15bc | 910 | *class = TAKE_PTR(c); |
0325941f LP |
911 | |
912 | return 0; | |
913 | } | |
914 | ||
634af566 | 915 | _public_ int sd_machine_get_ifindices(const char *machine, int **ifindices) { |
cabb0bc6 LP |
916 | _cleanup_free_ char *netif = NULL; |
917 | size_t l, allocated = 0, nr = 0; | |
cabb0bc6 | 918 | int *ni = NULL; |
a2a5291b | 919 | const char *p, *word, *state; |
cabb0bc6 LP |
920 | int r; |
921 | ||
922 | assert_return(machine_name_is_valid(machine), -EINVAL); | |
634af566 | 923 | assert_return(ifindices, -EINVAL); |
cabb0bc6 | 924 | |
63c372cb | 925 | p = strjoina("/run/systemd/machines/", machine); |
cabb0bc6 | 926 | r = parse_env_file(p, NEWLINE, "NETIF", &netif, NULL); |
707b66c6 LP |
927 | if (r == -ENOENT) |
928 | return -ENXIO; | |
cabb0bc6 LP |
929 | if (r < 0) |
930 | return r; | |
931 | if (!netif) { | |
634af566 | 932 | *ifindices = NULL; |
cabb0bc6 LP |
933 | return 0; |
934 | } | |
935 | ||
a2a5291b | 936 | FOREACH_WORD(word, l, netif, state) { |
cabb0bc6 LP |
937 | char buf[l+1]; |
938 | int ifi; | |
939 | ||
a2a5291b | 940 | *(char*) (mempcpy(buf, word, l)) = 0; |
cabb0bc6 | 941 | |
6ad623a3 | 942 | if (parse_ifindex(buf, &ifi) < 0) |
cabb0bc6 LP |
943 | continue; |
944 | ||
945 | if (!GREEDY_REALLOC(ni, allocated, nr+1)) { | |
946 | free(ni); | |
947 | return -ENOMEM; | |
948 | } | |
949 | ||
950 | ni[nr++] = ifi; | |
951 | } | |
952 | ||
634af566 | 953 | *ifindices = ni; |
cabb0bc6 LP |
954 | return nr; |
955 | } | |
956 | ||
034a2a52 LP |
957 | static inline int MONITOR_TO_FD(sd_login_monitor *m) { |
958 | return (int) (unsigned long) m - 1; | |
959 | } | |
960 | ||
961 | static inline sd_login_monitor* FD_TO_MONITOR(int fd) { | |
962 | return (sd_login_monitor*) (unsigned long) (fd + 1); | |
963 | } | |
964 | ||
965 | _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) { | |
4cbbc2a2 | 966 | _cleanup_close_ int fd = -1; |
034a2a52 | 967 | bool good = false; |
4cbbc2a2 | 968 | int k; |
034a2a52 | 969 | |
1ae464e0 | 970 | assert_return(m, -EINVAL); |
034a2a52 LP |
971 | |
972 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
973 | if (fd < 0) | |
bcb161b0 | 974 | return -errno; |
034a2a52 LP |
975 | |
976 | if (!category || streq(category, "seat")) { | |
977 | k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE); | |
4cbbc2a2 | 978 | if (k < 0) |
034a2a52 | 979 | return -errno; |
034a2a52 LP |
980 | |
981 | good = true; | |
982 | } | |
983 | ||
984 | if (!category || streq(category, "session")) { | |
985 | k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE); | |
4cbbc2a2 | 986 | if (k < 0) |
034a2a52 | 987 | return -errno; |
034a2a52 LP |
988 | |
989 | good = true; | |
990 | } | |
991 | ||
992 | if (!category || streq(category, "uid")) { | |
993 | k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE); | |
4cbbc2a2 | 994 | if (k < 0) |
034a2a52 | 995 | return -errno; |
034a2a52 LP |
996 | |
997 | good = true; | |
998 | } | |
999 | ||
e10375f2 | 1000 | if (!category || streq(category, "machine")) { |
ba73ed85 | 1001 | k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE); |
4cbbc2a2 | 1002 | if (k < 0) |
e10375f2 | 1003 | return -errno; |
e10375f2 LP |
1004 | |
1005 | good = true; | |
1006 | } | |
1007 | ||
4cbbc2a2 | 1008 | if (!good) |
034a2a52 | 1009 | return -EINVAL; |
034a2a52 LP |
1010 | |
1011 | *m = FD_TO_MONITOR(fd); | |
4cbbc2a2 LP |
1012 | fd = -1; |
1013 | ||
034a2a52 LP |
1014 | return 0; |
1015 | } | |
1016 | ||
1017 | _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { | |
1018 | int fd; | |
1019 | ||
4afd3348 LP |
1020 | if (!m) |
1021 | return NULL; | |
034a2a52 LP |
1022 | |
1023 | fd = MONITOR_TO_FD(m); | |
1024 | close_nointr(fd); | |
1025 | ||
1026 | return NULL; | |
1027 | } | |
1028 | ||
1029 | _public_ int sd_login_monitor_flush(sd_login_monitor *m) { | |
665dfe93 | 1030 | int r; |
034a2a52 | 1031 | |
1ae464e0 | 1032 | assert_return(m, -EINVAL); |
034a2a52 | 1033 | |
665dfe93 LP |
1034 | r = flush_fd(MONITOR_TO_FD(m)); |
1035 | if (r < 0) | |
1036 | return r; | |
1037 | ||
1038 | return 0; | |
034a2a52 LP |
1039 | } |
1040 | ||
1041 | _public_ int sd_login_monitor_get_fd(sd_login_monitor *m) { | |
1042 | ||
1ae464e0 | 1043 | assert_return(m, -EINVAL); |
034a2a52 LP |
1044 | |
1045 | return MONITOR_TO_FD(m); | |
1046 | } | |
dace83cb LP |
1047 | |
1048 | _public_ int sd_login_monitor_get_events(sd_login_monitor *m) { | |
1049 | ||
1ae464e0 | 1050 | assert_return(m, -EINVAL); |
dace83cb | 1051 | |
667c24a6 LP |
1052 | /* For now we will only return POLLIN here, since we don't |
1053 | * need anything else ever for inotify. However, let's have | |
1054 | * this API to keep our options open should we later on need | |
1055 | * it. */ | |
dace83cb LP |
1056 | return POLLIN; |
1057 | } | |
667c24a6 LP |
1058 | |
1059 | _public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) { | |
1060 | ||
1ae464e0 TA |
1061 | assert_return(m, -EINVAL); |
1062 | assert_return(timeout_usec, -EINVAL); | |
667c24a6 LP |
1063 | |
1064 | /* For now we will only return (uint64_t) -1, since we don't | |
1065 | * need any timeout. However, let's have this API to keep our | |
1066 | * options open should we later on need it. */ | |
1067 | *timeout_usec = (uint64_t) -1; | |
1068 | return 0; | |
1069 | } |