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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
74b91131 | 2 | |
74b91131 | 3 | #include <errno.h> |
0a6f50c0 | 4 | #include <poll.h> |
4f5dd394 LP |
5 | #include <sys/inotify.h> |
6 | #include <unistd.h> | |
74b91131 | 7 | |
07630cea LP |
8 | #include "sd-login.h" |
9 | ||
b5efdb8a | 10 | #include "alloc-util.h" |
74b91131 | 11 | #include "cgroup-util.h" |
f4f15635 | 12 | #include "dirent-util.h" |
686d13b9 | 13 | #include "env-file.h" |
4f5dd394 | 14 | #include "escape.h" |
81823e6c | 15 | #include "extract-word.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
f97b34a6 | 17 | #include "format-util.h" |
f4f15635 | 18 | #include "fs-util.h" |
25300b5a | 19 | #include "hostname-util.h" |
c004493c | 20 | #include "io-util.h" |
4f5dd394 LP |
21 | #include "login-util.h" |
22 | #include "macro.h" | |
6bedfcbb | 23 | #include "parse-util.h" |
bb15fafe | 24 | #include "path-util.h" |
2583fbea | 25 | #include "socket-util.h" |
81823e6c | 26 | #include "stdio-util.h" |
07630cea | 27 | #include "string-util.h" |
4f5dd394 | 28 | #include "strv.h" |
b1d4f8e1 | 29 | #include "user-util.h" |
4f5dd394 | 30 | #include "util.h" |
74b91131 | 31 | |
707b66c6 LP |
32 | /* Error codes: |
33 | * | |
34 | * invalid input parameters → -EINVAL | |
35 | * invalid fd → -EBADF | |
36 | * process does not exist → -ESRCH | |
37 | * cgroup does not exist → -ENOENT | |
38 | * machine, session does not exist → -ENXIO | |
39 | * requested metadata on object is missing → -ENODATA | |
40 | */ | |
41 | ||
034a2a52 | 42 | _public_ int sd_pid_get_session(pid_t pid, char **session) { |
19d64d10 | 43 | int r; |
ba1261bc | 44 | |
1ae464e0 TA |
45 | assert_return(pid >= 0, -EINVAL); |
46 | assert_return(session, -EINVAL); | |
034a2a52 | 47 | |
19d64d10 | 48 | r = cg_pid_get_session(pid, session); |
bc9e9af1 | 49 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
74b91131 LP |
50 | } |
51 | ||
94fb446e | 52 | _public_ int sd_pid_get_unit(pid_t pid, char **unit) { |
171f8f59 | 53 | int r; |
9847946e | 54 | |
1ae464e0 TA |
55 | assert_return(pid >= 0, -EINVAL); |
56 | assert_return(unit, -EINVAL); | |
9847946e | 57 | |
171f8f59 | 58 | r = cg_pid_get_unit(pid, unit); |
bc9e9af1 | 59 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
9847946e LP |
60 | } |
61 | ||
97e13058 | 62 | _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { |
d440fb97 | 63 | int r; |
97e13058 | 64 | |
1ae464e0 TA |
65 | assert_return(pid >= 0, -EINVAL); |
66 | assert_return(unit, -EINVAL); | |
97e13058 | 67 | |
d440fb97 | 68 | r = cg_pid_get_user_unit(pid, unit); |
bc9e9af1 | 69 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; |
97e13058 LP |
70 | } |
71 | ||
7027ff61 | 72 | _public_ int sd_pid_get_machine_name(pid_t pid, char **name) { |
bc9e9af1 | 73 | int r; |
7027ff61 | 74 | |
1ae464e0 TA |
75 | assert_return(pid >= 0, -EINVAL); |
76 | assert_return(name, -EINVAL); | |
7027ff61 | 77 | |
bc9e9af1 ZJS |
78 | r = cg_pid_get_machine_name(pid, name); |
79 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
7027ff61 LP |
80 | } |
81 | ||
1021b21b | 82 | _public_ int sd_pid_get_slice(pid_t pid, char **slice) { |
bc9e9af1 | 83 | int r; |
1021b21b | 84 | |
1ae464e0 TA |
85 | assert_return(pid >= 0, -EINVAL); |
86 | assert_return(slice, -EINVAL); | |
1021b21b | 87 | |
bc9e9af1 ZJS |
88 | r = cg_pid_get_slice(pid, slice); |
89 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
1021b21b LP |
90 | } |
91 | ||
329ac4bc | 92 | _public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { |
bc9e9af1 | 93 | int r; |
329ac4bc LP |
94 | |
95 | assert_return(pid >= 0, -EINVAL); | |
96 | assert_return(slice, -EINVAL); | |
97 | ||
bc9e9af1 ZJS |
98 | r = cg_pid_get_user_slice(pid, slice); |
99 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
329ac4bc LP |
100 | } |
101 | ||
034a2a52 | 102 | _public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { |
bc9e9af1 | 103 | int r; |
034a2a52 | 104 | |
1ae464e0 TA |
105 | assert_return(pid >= 0, -EINVAL); |
106 | assert_return(uid, -EINVAL); | |
034a2a52 | 107 | |
bc9e9af1 ZJS |
108 | r = cg_pid_get_owner_uid(pid, uid); |
109 | return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; | |
034a2a52 LP |
110 | } |
111 | ||
f5aaf575 LP |
112 | _public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) { |
113 | char *c; | |
114 | int r; | |
115 | ||
116 | assert_return(pid >= 0, -EINVAL); | |
117 | assert_return(cgroup, -EINVAL); | |
118 | ||
119 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c); | |
120 | if (r < 0) | |
121 | return r; | |
122 | ||
123 | /* The internal APIs return the empty string for the root | |
124 | * cgroup, let's return the "/" in the public APIs instead, as | |
595bfe7d | 125 | * that's easier and less ambiguous for people to grok. */ |
f5aaf575 LP |
126 | if (isempty(c)) { |
127 | free(c); | |
128 | c = strdup("/"); | |
129 | if (!c) | |
130 | return -ENOMEM; | |
131 | ||
132 | } | |
133 | ||
134 | *cgroup = c; | |
135 | return 0; | |
136 | } | |
137 | ||
bf34ab14 | 138 | _public_ int sd_peer_get_session(int fd, char **session) { |
a7f7d1bd | 139 | struct ucred ucred = {}; |
bf34ab14 LP |
140 | int r; |
141 | ||
8ac43fee | 142 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
143 | assert_return(session, -EINVAL); |
144 | ||
145 | r = getpeercred(fd, &ucred); | |
146 | if (r < 0) | |
147 | return r; | |
148 | ||
149 | return cg_pid_get_session(ucred.pid, session); | |
150 | } | |
151 | ||
152 | _public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) { | |
153 | struct ucred ucred; | |
154 | int r; | |
155 | ||
8ac43fee | 156 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
157 | assert_return(uid, -EINVAL); |
158 | ||
159 | r = getpeercred(fd, &ucred); | |
160 | if (r < 0) | |
161 | return r; | |
162 | ||
163 | return cg_pid_get_owner_uid(ucred.pid, uid); | |
164 | } | |
165 | ||
166 | _public_ int sd_peer_get_unit(int fd, char **unit) { | |
167 | struct ucred ucred; | |
168 | int r; | |
169 | ||
8ac43fee | 170 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
171 | assert_return(unit, -EINVAL); |
172 | ||
173 | r = getpeercred(fd, &ucred); | |
174 | if (r < 0) | |
175 | return r; | |
176 | ||
177 | return cg_pid_get_unit(ucred.pid, unit); | |
178 | } | |
179 | ||
180 | _public_ int sd_peer_get_user_unit(int fd, char **unit) { | |
181 | struct ucred ucred; | |
182 | int r; | |
183 | ||
8ac43fee | 184 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
185 | assert_return(unit, -EINVAL); |
186 | ||
187 | r = getpeercred(fd, &ucred); | |
188 | if (r < 0) | |
189 | return r; | |
190 | ||
191 | return cg_pid_get_user_unit(ucred.pid, unit); | |
192 | } | |
193 | ||
194 | _public_ int sd_peer_get_machine_name(int fd, char **machine) { | |
195 | struct ucred ucred; | |
196 | int r; | |
197 | ||
8ac43fee | 198 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
199 | assert_return(machine, -EINVAL); |
200 | ||
201 | r = getpeercred(fd, &ucred); | |
202 | if (r < 0) | |
203 | return r; | |
204 | ||
205 | return cg_pid_get_machine_name(ucred.pid, machine); | |
206 | } | |
207 | ||
208 | _public_ int sd_peer_get_slice(int fd, char **slice) { | |
209 | struct ucred ucred; | |
210 | int r; | |
211 | ||
8ac43fee | 212 | assert_return(fd >= 0, -EBADF); |
bf34ab14 LP |
213 | assert_return(slice, -EINVAL); |
214 | ||
215 | r = getpeercred(fd, &ucred); | |
216 | if (r < 0) | |
217 | return r; | |
218 | ||
219 | return cg_pid_get_slice(ucred.pid, slice); | |
220 | } | |
221 | ||
329ac4bc LP |
222 | _public_ int sd_peer_get_user_slice(int fd, char **slice) { |
223 | struct ucred ucred; | |
224 | int r; | |
225 | ||
8ac43fee | 226 | assert_return(fd >= 0, -EBADF); |
329ac4bc LP |
227 | assert_return(slice, -EINVAL); |
228 | ||
229 | r = getpeercred(fd, &ucred); | |
230 | if (r < 0) | |
231 | return r; | |
232 | ||
233 | return cg_pid_get_user_slice(ucred.pid, slice); | |
234 | } | |
235 | ||
f5aaf575 LP |
236 | _public_ int sd_peer_get_cgroup(int fd, char **cgroup) { |
237 | struct ucred ucred; | |
238 | int r; | |
239 | ||
240 | assert_return(fd >= 0, -EBADF); | |
241 | assert_return(cgroup, -EINVAL); | |
242 | ||
243 | r = getpeercred(fd, &ucred); | |
244 | if (r < 0) | |
245 | return r; | |
246 | ||
247 | return sd_pid_get_cgroup(ucred.pid, cgroup); | |
248 | } | |
249 | ||
a077b666 | 250 | static int file_of_uid(uid_t uid, char **p) { |
707b66c6 LP |
251 | |
252 | assert_return(uid_is_valid(uid), -EINVAL); | |
a077b666 LP |
253 | assert(p); |
254 | ||
255 | if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0) | |
256 | return -ENOMEM; | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
74b91131 | 261 | _public_ int sd_uid_get_state(uid_t uid, char**state) { |
13df9c39 | 262 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 LP |
263 | int r; |
264 | ||
1ae464e0 | 265 | assert_return(state, -EINVAL); |
74b91131 | 266 | |
a077b666 LP |
267 | r = file_of_uid(uid, &p); |
268 | if (r < 0) | |
269 | return r; | |
74b91131 | 270 | |
13df9c39 | 271 | r = parse_env_file(NULL, p, "STATE", &s); |
74b91131 | 272 | if (r == -ENOENT) { |
13df9c39 LP |
273 | r = free_and_strdup(&s, "offline"); |
274 | if (r < 0) | |
275 | return r; | |
276 | } else if (r < 0) | |
74b91131 | 277 | return r; |
13df9c39 | 278 | else if (isempty(s)) |
74b91131 LP |
279 | return -EIO; |
280 | ||
13df9c39 | 281 | *state = TAKE_PTR(s); |
74b91131 LP |
282 | return 0; |
283 | } | |
284 | ||
a077b666 LP |
285 | _public_ int sd_uid_get_display(uid_t uid, char **session) { |
286 | _cleanup_free_ char *p = NULL, *s = NULL; | |
287 | int r; | |
288 | ||
289 | assert_return(session, -EINVAL); | |
290 | ||
291 | r = file_of_uid(uid, &p); | |
292 | if (r < 0) | |
293 | return r; | |
294 | ||
13df9c39 | 295 | r = parse_env_file(NULL, p, "DISPLAY", &s); |
fc60d815 | 296 | if (r == -ENOENT) |
707b66c6 | 297 | return -ENODATA; |
a077b666 LP |
298 | if (r < 0) |
299 | return r; | |
a077b666 | 300 | if (isempty(s)) |
707b66c6 | 301 | return -ENODATA; |
a077b666 | 302 | |
ae2a15bc | 303 | *session = TAKE_PTR(s); |
a077b666 LP |
304 | |
305 | return 0; | |
306 | } | |
307 | ||
707b66c6 LP |
308 | static int file_of_seat(const char *seat, char **_p) { |
309 | char *p; | |
310 | int r; | |
311 | ||
312 | assert(_p); | |
313 | ||
314 | if (seat) { | |
315 | if (!filename_is_valid(seat)) | |
316 | return -EINVAL; | |
317 | ||
b910cc72 | 318 | p = path_join("/run/systemd/seats", seat); |
707b66c6 LP |
319 | } else { |
320 | _cleanup_free_ char *buf = NULL; | |
321 | ||
322 | r = sd_session_get_seat(NULL, &buf); | |
323 | if (r < 0) | |
324 | return r; | |
325 | ||
b910cc72 | 326 | p = path_join("/run/systemd/seats", buf); |
707b66c6 | 327 | } |
707b66c6 LP |
328 | if (!p) |
329 | return -ENOMEM; | |
330 | ||
ae2a15bc | 331 | *_p = TAKE_PTR(p); |
707b66c6 LP |
332 | return 0; |
333 | } | |
334 | ||
034a2a52 | 335 | _public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) { |
81823e6c | 336 | _cleanup_free_ char *filename = NULL, *content = NULL; |
74b91131 LP |
337 | int r; |
338 | ||
a1f686da | 339 | assert_return(uid_is_valid(uid), -EINVAL); |
74b91131 | 340 | |
81823e6c | 341 | r = file_of_seat(seat, &filename); |
707b66c6 LP |
342 | if (r < 0) |
343 | return r; | |
034a2a52 | 344 | |
81823e6c ZJS |
345 | r = parse_env_file(NULL, filename, |
346 | require_active ? "ACTIVE_UID" : "UIDS", | |
347 | &content); | |
707b66c6 LP |
348 | if (r == -ENOENT) |
349 | return 0; | |
d70964d0 | 350 | if (r < 0) |
74b91131 | 351 | return r; |
81823e6c | 352 | if (isempty(content)) |
707b66c6 | 353 | return 0; |
74b91131 | 354 | |
81823e6c ZJS |
355 | char t[DECIMAL_STR_MAX(uid_t)]; |
356 | xsprintf(t, UID_FMT, uid); | |
74b91131 | 357 | |
04bd604f | 358 | return string_contains_word(content, NULL, t); |
74b91131 LP |
359 | } |
360 | ||
034a2a52 | 361 | static int uid_get_array(uid_t uid, const char *variable, char ***array) { |
d70964d0 | 362 | _cleanup_free_ char *p = NULL, *s = NULL; |
034a2a52 LP |
363 | char **a; |
364 | int r; | |
365 | ||
707b66c6 | 366 | assert(variable); |
a1f686da | 367 | |
a077b666 LP |
368 | r = file_of_uid(uid, &p); |
369 | if (r < 0) | |
370 | return r; | |
034a2a52 | 371 | |
13df9c39 | 372 | r = parse_env_file(NULL, p, variable, &s); |
707b66c6 | 373 | if (r == -ENOENT || (r >= 0 && isempty(s))) { |
d60ef526 LP |
374 | if (array) |
375 | *array = NULL; | |
034a2a52 LP |
376 | return 0; |
377 | } | |
707b66c6 LP |
378 | if (r < 0) |
379 | return r; | |
034a2a52 | 380 | |
aa3b40c3 | 381 | a = strv_split(s, NULL); |
034a2a52 LP |
382 | if (!a) |
383 | return -ENOMEM; | |
384 | ||
d60ef526 | 385 | strv_uniq(a); |
da6053d0 | 386 | r = (int) strv_length(a); |
d60ef526 LP |
387 | |
388 | if (array) | |
389 | *array = a; | |
390 | else | |
391 | strv_free(a); | |
392 | ||
393 | return r; | |
034a2a52 LP |
394 | } |
395 | ||
396 | _public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) { | |
d18dff43 LP |
397 | return uid_get_array( |
398 | uid, | |
399 | require_active == 0 ? "ONLINE_SESSIONS" : | |
400 | require_active > 0 ? "ACTIVE_SESSIONS" : | |
401 | "SESSIONS", | |
402 | sessions); | |
74b91131 LP |
403 | } |
404 | ||
034a2a52 | 405 | _public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) { |
d18dff43 LP |
406 | return uid_get_array( |
407 | uid, | |
408 | require_active == 0 ? "ONLINE_SEATS" : | |
409 | require_active > 0 ? "ACTIVE_SEATS" : | |
410 | "SEATS", | |
411 | seats); | |
74b91131 LP |
412 | } |
413 | ||
50b1678a LP |
414 | static int file_of_session(const char *session, char **_p) { |
415 | char *p; | |
74b91131 | 416 | int r; |
74b91131 | 417 | |
50b1678a LP |
418 | assert(_p); |
419 | ||
4b549144 ZJS |
420 | if (session) { |
421 | if (!session_id_valid(session)) | |
422 | return -EINVAL; | |
423 | ||
b910cc72 | 424 | p = path_join("/run/systemd/sessions", session); |
4b549144 ZJS |
425 | } else { |
426 | _cleanup_free_ char *buf = NULL; | |
50b1678a LP |
427 | |
428 | r = sd_pid_get_session(0, &buf); | |
429 | if (r < 0) | |
430 | return r; | |
431 | ||
b910cc72 | 432 | p = path_join("/run/systemd/sessions", buf); |
50b1678a | 433 | } |
74b91131 | 434 | |
74b91131 LP |
435 | if (!p) |
436 | return -ENOMEM; | |
437 | ||
50b1678a LP |
438 | *_p = p; |
439 | return 0; | |
440 | } | |
441 | ||
442 | _public_ int sd_session_is_active(const char *session) { | |
d70964d0 | 443 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 444 | int r; |
50b1678a LP |
445 | |
446 | r = file_of_session(session, &p); | |
447 | if (r < 0) | |
448 | return r; | |
449 | ||
13df9c39 | 450 | r = parse_env_file(NULL, p, "ACTIVE", &s); |
707b66c6 LP |
451 | if (r == -ENOENT) |
452 | return -ENXIO; | |
d70964d0 | 453 | if (r < 0) |
74b91131 | 454 | return r; |
707b66c6 | 455 | if (isempty(s)) |
74b91131 LP |
456 | return -EIO; |
457 | ||
0325941f | 458 | return parse_boolean(s); |
74b91131 LP |
459 | } |
460 | ||
5b04fe60 | 461 | _public_ int sd_session_is_remote(const char *session) { |
5b04fe60 | 462 | _cleanup_free_ char *p = NULL, *s = NULL; |
707b66c6 | 463 | int r; |
5b04fe60 MM |
464 | |
465 | r = file_of_session(session, &p); | |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
13df9c39 | 469 | r = parse_env_file(NULL, p, "REMOTE", &s); |
707b66c6 LP |
470 | if (r == -ENOENT) |
471 | return -ENXIO; | |
5b04fe60 MM |
472 | if (r < 0) |
473 | return r; | |
707b66c6 LP |
474 | if (isempty(s)) |
475 | return -ENODATA; | |
5b04fe60 | 476 | |
0325941f | 477 | return parse_boolean(s); |
5b04fe60 MM |
478 | } |
479 | ||
0604381b | 480 | _public_ int sd_session_get_state(const char *session, char **state) { |
d70964d0 | 481 | _cleanup_free_ char *p = NULL, *s = NULL; |
0604381b LP |
482 | int r; |
483 | ||
1ae464e0 | 484 | assert_return(state, -EINVAL); |
0604381b LP |
485 | |
486 | r = file_of_session(session, &p); | |
487 | if (r < 0) | |
488 | return r; | |
489 | ||
13df9c39 | 490 | r = parse_env_file(NULL, p, "STATE", &s); |
707b66c6 LP |
491 | if (r == -ENOENT) |
492 | return -ENXIO; | |
d70964d0 | 493 | if (r < 0) |
0604381b | 494 | return r; |
707b66c6 | 495 | if (isempty(s)) |
0604381b LP |
496 | return -EIO; |
497 | ||
ae2a15bc | 498 | *state = TAKE_PTR(s); |
d70964d0 | 499 | |
0604381b LP |
500 | return 0; |
501 | } | |
502 | ||
74b91131 LP |
503 | _public_ int sd_session_get_uid(const char *session, uid_t *uid) { |
504 | int r; | |
d70964d0 | 505 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 | 506 | |
1ae464e0 | 507 | assert_return(uid, -EINVAL); |
74b91131 | 508 | |
50b1678a LP |
509 | r = file_of_session(session, &p); |
510 | if (r < 0) | |
511 | return r; | |
74b91131 | 512 | |
13df9c39 | 513 | r = parse_env_file(NULL, p, "UID", &s); |
707b66c6 LP |
514 | if (r == -ENOENT) |
515 | return -ENXIO; | |
d70964d0 | 516 | if (r < 0) |
74b91131 | 517 | return r; |
707b66c6 | 518 | if (isempty(s)) |
74b91131 LP |
519 | return -EIO; |
520 | ||
0325941f | 521 | return parse_uid(s, uid); |
74b91131 LP |
522 | } |
523 | ||
51f58f08 | 524 | static int session_get_string(const char *session, const char *field, char **value) { |
d70964d0 | 525 | _cleanup_free_ char *p = NULL, *s = NULL; |
74b91131 LP |
526 | int r; |
527 | ||
1ae464e0 | 528 | assert_return(value, -EINVAL); |
707b66c6 | 529 | assert(field); |
74b91131 | 530 | |
50b1678a LP |
531 | r = file_of_session(session, &p); |
532 | if (r < 0) | |
533 | return r; | |
74b91131 | 534 | |
13df9c39 | 535 | r = parse_env_file(NULL, p, field, &s); |
707b66c6 LP |
536 | if (r == -ENOENT) |
537 | return -ENXIO; | |
d70964d0 | 538 | if (r < 0) |
74b91131 | 539 | return r; |
74b91131 | 540 | if (isempty(s)) |
707b66c6 | 541 | return -ENODATA; |
74b91131 | 542 | |
ae2a15bc | 543 | *value = TAKE_PTR(s); |
74b91131 LP |
544 | return 0; |
545 | } | |
546 | ||
51f58f08 LP |
547 | _public_ int sd_session_get_seat(const char *session, char **seat) { |
548 | return session_get_string(session, "SEAT", seat); | |
549 | } | |
eff40633 | 550 | |
c84f5e4a LP |
551 | _public_ int sd_session_get_tty(const char *session, char **tty) { |
552 | return session_get_string(session, "TTY", tty); | |
553 | } | |
554 | ||
44ded3ab | 555 | _public_ int sd_session_get_vt(const char *session, unsigned *vtnr) { |
3f4fee03 | 556 | _cleanup_free_ char *vtnr_string = NULL; |
44ded3ab GC |
557 | unsigned u; |
558 | int r; | |
559 | ||
707b66c6 LP |
560 | assert_return(vtnr, -EINVAL); |
561 | ||
0581dac2 | 562 | r = session_get_string(session, "VTNR", &vtnr_string); |
44ded3ab GC |
563 | if (r < 0) |
564 | return r; | |
565 | ||
566 | r = safe_atou(vtnr_string, &u); | |
567 | if (r < 0) | |
568 | return r; | |
569 | ||
570 | *vtnr = u; | |
571 | return 0; | |
572 | } | |
573 | ||
51f58f08 LP |
574 | _public_ int sd_session_get_service(const char *session, char **service) { |
575 | return session_get_string(session, "SERVICE", service); | |
576 | } | |
eff40633 | 577 | |
51f58f08 LP |
578 | _public_ int sd_session_get_type(const char *session, char **type) { |
579 | return session_get_string(session, "TYPE", type); | |
580 | } | |
eff40633 | 581 | |
51f58f08 LP |
582 | _public_ int sd_session_get_class(const char *session, char **class) { |
583 | return session_get_string(session, "CLASS", class); | |
eff40633 LP |
584 | } |
585 | ||
c72d5456 DH |
586 | _public_ int sd_session_get_desktop(const char *session, char **desktop) { |
587 | _cleanup_free_ char *escaped = NULL; | |
588 | char *t; | |
589 | int r; | |
590 | ||
591 | assert_return(desktop, -EINVAL); | |
592 | ||
593 | r = session_get_string(session, "DESKTOP", &escaped); | |
594 | if (r < 0) | |
595 | return r; | |
596 | ||
527b7a42 LP |
597 | r = cunescape(escaped, 0, &t); |
598 | if (r < 0) | |
599 | return r; | |
c72d5456 DH |
600 | |
601 | *desktop = t; | |
602 | return 0; | |
603 | } | |
604 | ||
fc8af9ff LP |
605 | _public_ int sd_session_get_display(const char *session, char **display) { |
606 | return session_get_string(session, "DISPLAY", display); | |
607 | } | |
608 | ||
5b04fe60 MM |
609 | _public_ int sd_session_get_remote_user(const char *session, char **remote_user) { |
610 | return session_get_string(session, "REMOTE_USER", remote_user); | |
611 | } | |
612 | ||
613 | _public_ int sd_session_get_remote_host(const char *session, char **remote_host) { | |
614 | return session_get_string(session, "REMOTE_HOST", remote_host); | |
615 | } | |
616 | ||
74b91131 | 617 | _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) { |
d70964d0 | 618 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; |
74b91131 LP |
619 | int r; |
620 | ||
1ae464e0 | 621 | assert_return(session || uid, -EINVAL); |
74b91131 | 622 | |
50b1678a LP |
623 | r = file_of_seat(seat, &p); |
624 | if (r < 0) | |
625 | return r; | |
74b91131 | 626 | |
aa8fbc74 | 627 | r = parse_env_file(NULL, p, |
74b91131 | 628 | "ACTIVE", &s, |
13df9c39 | 629 | "ACTIVE_UID", &t); |
707b66c6 LP |
630 | if (r == -ENOENT) |
631 | return -ENXIO; | |
d70964d0 | 632 | if (r < 0) |
74b91131 | 633 | return r; |
74b91131 | 634 | |
d70964d0 | 635 | if (session && !s) |
4211d5bd | 636 | return -ENODATA; |
74b91131 | 637 | |
d70964d0 | 638 | if (uid && !t) |
4211d5bd | 639 | return -ENODATA; |
74b91131 LP |
640 | |
641 | if (uid && t) { | |
034a2a52 | 642 | r = parse_uid(t, uid); |
d70964d0 | 643 | if (r < 0) |
74b91131 | 644 | return r; |
74b91131 LP |
645 | } |
646 | ||
ae2a15bc LP |
647 | if (session && s) |
648 | *session = TAKE_PTR(s); | |
74b91131 LP |
649 | |
650 | return 0; | |
651 | } | |
034a2a52 | 652 | |
aa3b40c3 ZJS |
653 | _public_ int sd_seat_get_sessions( |
654 | const char *seat, | |
655 | char ***ret_sessions, | |
656 | uid_t **ret_uids, | |
657 | unsigned *ret_n_uids) { | |
658 | ||
659 | _cleanup_free_ char *fname = NULL, *session_line = NULL, *uid_line = NULL; | |
660 | _cleanup_strv_free_ char **sessions = NULL; | |
661 | _cleanup_free_ uid_t *uids = NULL; | |
662 | unsigned n_sessions = 0; | |
034a2a52 LP |
663 | int r; |
664 | ||
aa3b40c3 | 665 | r = file_of_seat(seat, &fname); |
50b1678a LP |
666 | if (r < 0) |
667 | return r; | |
034a2a52 | 668 | |
aa3b40c3 ZJS |
669 | r = parse_env_file(NULL, fname, |
670 | "SESSIONS", &session_line, | |
671 | "UIDS", &uid_line); | |
707b66c6 LP |
672 | if (r == -ENOENT) |
673 | return -ENXIO; | |
d70964d0 | 674 | if (r < 0) |
034a2a52 | 675 | return r; |
034a2a52 | 676 | |
aa3b40c3 ZJS |
677 | if (session_line) { |
678 | sessions = strv_split(session_line, NULL); | |
679 | if (!sessions) | |
034a2a52 | 680 | return -ENOMEM; |
034a2a52 | 681 | |
aa3b40c3 ZJS |
682 | n_sessions = strv_length(sessions); |
683 | }; | |
034a2a52 | 684 | |
aa3b40c3 ZJS |
685 | if (ret_uids && uid_line) { |
686 | uids = new(uid_t, n_sessions); | |
687 | if (!uids) | |
688 | return -ENOMEM; | |
034a2a52 | 689 | |
aa3b40c3 ZJS |
690 | size_t n = 0; |
691 | for (const char *p = uid_line;;) { | |
692 | _cleanup_free_ char *word = NULL; | |
de3756ab | 693 | |
aa3b40c3 ZJS |
694 | r = extract_first_word(&p, &word, NULL, 0); |
695 | if (r < 0) | |
696 | return r; | |
697 | if (r == 0) | |
698 | break; | |
de3756ab | 699 | |
aa3b40c3 ZJS |
700 | r = parse_uid(word, &uids[n++]); |
701 | if (r < 0) | |
702 | return r; | |
034a2a52 | 703 | } |
d60ef526 | 704 | |
aa3b40c3 ZJS |
705 | if (n != n_sessions) |
706 | return -EUCLEAN; | |
707 | } | |
034a2a52 | 708 | |
aa3b40c3 ZJS |
709 | if (ret_sessions) |
710 | *ret_sessions = TAKE_PTR(sessions); | |
711 | if (ret_uids) | |
712 | *ret_uids = TAKE_PTR(uids); | |
713 | if (ret_n_uids) | |
714 | *ret_n_uids = n_sessions; | |
034a2a52 | 715 | |
aa3b40c3 | 716 | return n_sessions; |
034a2a52 LP |
717 | } |
718 | ||
20747498 | 719 | static int seat_get_can(const char *seat, const char *variable) { |
d70964d0 | 720 | _cleanup_free_ char *p = NULL, *s = NULL; |
add30678 LP |
721 | int r; |
722 | ||
707b66c6 | 723 | assert(variable); |
0325941f | 724 | |
50b1678a LP |
725 | r = file_of_seat(seat, &p); |
726 | if (r < 0) | |
727 | return r; | |
add30678 | 728 | |
aa8fbc74 | 729 | r = parse_env_file(NULL, p, |
13df9c39 | 730 | variable, &s); |
707b66c6 LP |
731 | if (r == -ENOENT) |
732 | return -ENXIO; | |
d70964d0 | 733 | if (r < 0) |
add30678 | 734 | return r; |
707b66c6 LP |
735 | if (isempty(s)) |
736 | return -ENODATA; | |
add30678 | 737 | |
0325941f | 738 | return parse_boolean(s); |
add30678 LP |
739 | } |
740 | ||
20747498 | 741 | _public_ int sd_seat_can_multi_session(const char *seat) { |
8f8cc84b | 742 | return true; |
20747498 LP |
743 | } |
744 | ||
745 | _public_ int sd_seat_can_tty(const char *seat) { | |
746 | return seat_get_can(seat, "CAN_TTY"); | |
747 | } | |
748 | ||
749 | _public_ int sd_seat_can_graphical(const char *seat) { | |
750 | return seat_get_can(seat, "CAN_GRAPHICAL"); | |
751 | } | |
752 | ||
034a2a52 | 753 | _public_ int sd_get_seats(char ***seats) { |
2b5e9267 YW |
754 | int r; |
755 | ||
756 | r = get_files_in_directory("/run/systemd/seats/", seats); | |
757 | if (r == -ENOENT) { | |
758 | if (seats) | |
759 | *seats = NULL; | |
760 | return 0; | |
761 | } | |
762 | return r; | |
034a2a52 LP |
763 | } |
764 | ||
765 | _public_ int sd_get_sessions(char ***sessions) { | |
2b5e9267 YW |
766 | int r; |
767 | ||
768 | r = get_files_in_directory("/run/systemd/sessions/", sessions); | |
769 | if (r == -ENOENT) { | |
770 | if (sessions) | |
771 | *sessions = NULL; | |
772 | return 0; | |
773 | } | |
774 | return r; | |
034a2a52 LP |
775 | } |
776 | ||
777 | _public_ int sd_get_uids(uid_t **users) { | |
d70964d0 | 778 | _cleanup_closedir_ DIR *d; |
8fb3f009 | 779 | struct dirent *de; |
034a2a52 LP |
780 | int r = 0; |
781 | unsigned n = 0; | |
d70964d0 | 782 | _cleanup_free_ uid_t *l = NULL; |
034a2a52 | 783 | |
034a2a52 | 784 | d = opendir("/run/systemd/users/"); |
2b5e9267 YW |
785 | if (!d) { |
786 | if (errno == ENOENT) { | |
787 | if (users) | |
788 | *users = NULL; | |
789 | return 0; | |
790 | } | |
8ea913b2 | 791 | return -errno; |
2b5e9267 | 792 | } |
8ea913b2 | 793 | |
8fb3f009 | 794 | FOREACH_DIRENT_ALL(de, d, return -errno) { |
034a2a52 LP |
795 | int k; |
796 | uid_t uid; | |
797 | ||
034a2a52 LP |
798 | dirent_ensure_type(d, de); |
799 | ||
800 | if (!dirent_is_file(de)) | |
801 | continue; | |
802 | ||
803 | k = parse_uid(de->d_name, &uid); | |
804 | if (k < 0) | |
805 | continue; | |
806 | ||
d60ef526 LP |
807 | if (users) { |
808 | if ((unsigned) r >= n) { | |
809 | uid_t *t; | |
034a2a52 | 810 | |
d60ef526 | 811 | n = MAX(16, 2*r); |
a7798cd8 | 812 | t = reallocarray(l, sizeof(uid_t), n); |
d70964d0 HH |
813 | if (!t) |
814 | return -ENOMEM; | |
034a2a52 | 815 | |
d60ef526 LP |
816 | l = t; |
817 | } | |
034a2a52 | 818 | |
d60ef526 LP |
819 | assert((unsigned) r < n); |
820 | l[r++] = uid; | |
821 | } else | |
822 | r++; | |
034a2a52 LP |
823 | } |
824 | ||
1cc6c93a YW |
825 | if (users) |
826 | *users = TAKE_PTR(l); | |
034a2a52 LP |
827 | |
828 | return r; | |
829 | } | |
830 | ||
4d5fb962 | 831 | _public_ int sd_get_machine_names(char ***machines) { |
96480634 ZJS |
832 | _cleanup_strv_free_ char **l = NULL; |
833 | char **a, **b; | |
89f7c846 LP |
834 | int r; |
835 | ||
836 | r = get_files_in_directory("/run/systemd/machines/", &l); | |
0543105b | 837 | if (r == -ENOENT) { |
76ed21e1 YW |
838 | if (machines) |
839 | *machines = NULL; | |
0543105b ZJS |
840 | return 0; |
841 | } | |
89f7c846 LP |
842 | if (r < 0) |
843 | return r; | |
844 | ||
845 | if (l) { | |
846 | r = 0; | |
847 | ||
848 | /* Filter out the unit: symlinks */ | |
76ed21e1 | 849 | for (a = b = l; *a; a++) { |
b9a8d250 | 850 | if (startswith(*a, "unit:") || !machine_name_is_valid(*a)) |
89f7c846 LP |
851 | free(*a); |
852 | else { | |
853 | *b = *a; | |
854 | b++; | |
855 | r++; | |
856 | } | |
857 | } | |
858 | ||
859 | *b = NULL; | |
860 | } | |
861 | ||
ae2a15bc LP |
862 | if (machines) |
863 | *machines = TAKE_PTR(l); | |
864 | ||
89f7c846 | 865 | return r; |
a20affe2 LP |
866 | } |
867 | ||
0325941f LP |
868 | _public_ int sd_machine_get_class(const char *machine, char **class) { |
869 | _cleanup_free_ char *c = NULL; | |
870 | const char *p; | |
871 | int r; | |
872 | ||
0325941f LP |
873 | assert_return(class, -EINVAL); |
874 | ||
a8c9b7a0 LP |
875 | if (streq(machine, ".host")) { |
876 | c = strdup("host"); | |
877 | if (!c) | |
878 | return -ENOMEM; | |
879 | } else { | |
880 | if (!machine_name_is_valid(machine)) | |
881 | return -EINVAL; | |
0325941f | 882 | |
a8c9b7a0 | 883 | p = strjoina("/run/systemd/machines/", machine); |
13df9c39 | 884 | r = parse_env_file(NULL, p, "CLASS", &c); |
a8c9b7a0 LP |
885 | if (r == -ENOENT) |
886 | return -ENXIO; | |
887 | if (r < 0) | |
888 | return r; | |
889 | if (!c) | |
890 | return -EIO; | |
891 | } | |
0325941f | 892 | |
a8c9b7a0 | 893 | *class = TAKE_PTR(c); |
0325941f LP |
894 | return 0; |
895 | } | |
896 | ||
0ef14adc ZJS |
897 | _public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices) { |
898 | _cleanup_free_ char *netif_line = NULL; | |
899 | const char *p; | |
cabb0bc6 LP |
900 | int r; |
901 | ||
902 | assert_return(machine_name_is_valid(machine), -EINVAL); | |
cabb0bc6 | 903 | |
63c372cb | 904 | p = strjoina("/run/systemd/machines/", machine); |
0ef14adc | 905 | r = parse_env_file(NULL, p, "NETIF", &netif_line); |
707b66c6 LP |
906 | if (r == -ENOENT) |
907 | return -ENXIO; | |
cabb0bc6 LP |
908 | if (r < 0) |
909 | return r; | |
0ef14adc ZJS |
910 | if (!netif_line) { |
911 | *ret_ifindices = NULL; | |
cabb0bc6 LP |
912 | return 0; |
913 | } | |
914 | ||
0ef14adc ZJS |
915 | _cleanup_strv_free_ char **tt = strv_split(netif_line, NULL); |
916 | if (!tt) | |
917 | return -ENOMEM; | |
cabb0bc6 | 918 | |
7a7e97ad | 919 | _cleanup_free_ int *ifindices = NULL; |
dd630d3c ZJS |
920 | if (ret_ifindices) { |
921 | ifindices = new(int, strv_length(tt)); | |
922 | if (!ifindices) | |
923 | return -ENOMEM; | |
924 | } | |
cabb0bc6 | 925 | |
7a7e97ad | 926 | size_t n = 0; |
0ef14adc ZJS |
927 | for (size_t i = 0; tt[i]; i++) { |
928 | int ind; | |
cabb0bc6 | 929 | |
0ef14adc ZJS |
930 | ind = parse_ifindex(tt[i]); |
931 | if (ind < 0) | |
932 | /* Return -EUCLEAN to distinguish from -EINVAL for invalid args */ | |
933 | return ind == -EINVAL ? -EUCLEAN : ind; | |
cabb0bc6 | 934 | |
dd630d3c ZJS |
935 | if (ret_ifindices) |
936 | ifindices[n] = ind; | |
937 | n++; | |
cabb0bc6 LP |
938 | } |
939 | ||
dd630d3c | 940 | if (ret_ifindices) |
7a7e97ad LP |
941 | *ret_ifindices = TAKE_PTR(ifindices); |
942 | ||
0ef14adc | 943 | return n; |
cabb0bc6 LP |
944 | } |
945 | ||
a1e92eee | 946 | static int MONITOR_TO_FD(sd_login_monitor *m) { |
034a2a52 LP |
947 | return (int) (unsigned long) m - 1; |
948 | } | |
949 | ||
a1e92eee | 950 | static sd_login_monitor* FD_TO_MONITOR(int fd) { |
034a2a52 LP |
951 | return (sd_login_monitor*) (unsigned long) (fd + 1); |
952 | } | |
953 | ||
954 | _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) { | |
4cbbc2a2 | 955 | _cleanup_close_ int fd = -1; |
034a2a52 | 956 | bool good = false; |
4cbbc2a2 | 957 | int k; |
034a2a52 | 958 | |
1ae464e0 | 959 | assert_return(m, -EINVAL); |
034a2a52 LP |
960 | |
961 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
962 | if (fd < 0) | |
bcb161b0 | 963 | return -errno; |
034a2a52 LP |
964 | |
965 | if (!category || streq(category, "seat")) { | |
966 | k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE); | |
4cbbc2a2 | 967 | if (k < 0) |
034a2a52 | 968 | return -errno; |
034a2a52 LP |
969 | |
970 | good = true; | |
971 | } | |
972 | ||
973 | if (!category || streq(category, "session")) { | |
974 | k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE); | |
4cbbc2a2 | 975 | if (k < 0) |
034a2a52 | 976 | return -errno; |
034a2a52 LP |
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); | |
4cbbc2a2 | 983 | if (k < 0) |
034a2a52 | 984 | return -errno; |
034a2a52 LP |
985 | |
986 | good = true; | |
987 | } | |
988 | ||
e10375f2 | 989 | if (!category || streq(category, "machine")) { |
ba73ed85 | 990 | k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE); |
4cbbc2a2 | 991 | if (k < 0) |
e10375f2 | 992 | return -errno; |
e10375f2 LP |
993 | |
994 | good = true; | |
995 | } | |
996 | ||
4cbbc2a2 | 997 | if (!good) |
034a2a52 | 998 | return -EINVAL; |
034a2a52 | 999 | |
d52e1c42 | 1000 | *m = FD_TO_MONITOR(TAKE_FD(fd)); |
034a2a52 LP |
1001 | return 0; |
1002 | } | |
1003 | ||
1004 | _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { | |
d52e1c42 ZJS |
1005 | if (m) |
1006 | close_nointr(MONITOR_TO_FD(m)); | |
034a2a52 LP |
1007 | |
1008 | return NULL; | |
1009 | } | |
1010 | ||
1011 | _public_ int sd_login_monitor_flush(sd_login_monitor *m) { | |
665dfe93 | 1012 | int r; |
034a2a52 | 1013 | |
1ae464e0 | 1014 | assert_return(m, -EINVAL); |
034a2a52 | 1015 | |
665dfe93 LP |
1016 | r = flush_fd(MONITOR_TO_FD(m)); |
1017 | if (r < 0) | |
1018 | return r; | |
1019 | ||
1020 | return 0; | |
034a2a52 LP |
1021 | } |
1022 | ||
1023 | _public_ int sd_login_monitor_get_fd(sd_login_monitor *m) { | |
1024 | ||
1ae464e0 | 1025 | assert_return(m, -EINVAL); |
034a2a52 LP |
1026 | |
1027 | return MONITOR_TO_FD(m); | |
1028 | } | |
dace83cb LP |
1029 | |
1030 | _public_ int sd_login_monitor_get_events(sd_login_monitor *m) { | |
1031 | ||
1ae464e0 | 1032 | assert_return(m, -EINVAL); |
dace83cb | 1033 | |
667c24a6 LP |
1034 | /* For now we will only return POLLIN here, since we don't |
1035 | * need anything else ever for inotify. However, let's have | |
1036 | * this API to keep our options open should we later on need | |
1037 | * it. */ | |
dace83cb LP |
1038 | return POLLIN; |
1039 | } | |
667c24a6 LP |
1040 | |
1041 | _public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) { | |
1042 | ||
1ae464e0 TA |
1043 | assert_return(m, -EINVAL); |
1044 | assert_return(timeout_usec, -EINVAL); | |
667c24a6 LP |
1045 | |
1046 | /* For now we will only return (uint64_t) -1, since we don't | |
1047 | * need any timeout. However, let's have this API to keep our | |
1048 | * options open should we later on need it. */ | |
1049 | *timeout_usec = (uint64_t) -1; | |
1050 | return 0; | |
1051 | } |