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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
ec8e4a0e LP |
2 | |
3 | #include <sys/auxv.h> | |
4 | ||
85f088ab | 5 | #include "conf-files.h" |
ec8e4a0e | 6 | #include "dirent-util.h" |
037b0a47 | 7 | #include "dlfcn-util.h" |
ec8e4a0e LP |
8 | #include "errno-util.h" |
9 | #include "fd-util.h" | |
85f088ab | 10 | #include "format-util.h" |
ec8e4a0e LP |
11 | #include "missing_syscall.h" |
12 | #include "parse-util.h" | |
13 | #include "set.h" | |
14 | #include "socket-util.h" | |
15 | #include "strv.h" | |
16 | #include "user-record-nss.h" | |
17 | #include "user-util.h" | |
85f088ab | 18 | #include "userdb-dropin.h" |
ec8e4a0e LP |
19 | #include "userdb.h" |
20 | #include "varlink.h" | |
21 | ||
22 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(link_hash_ops, void, trivial_hash_func, trivial_compare_func, Varlink, varlink_unref); | |
23 | ||
24 | typedef enum LookupWhat { | |
25 | LOOKUP_USER, | |
26 | LOOKUP_GROUP, | |
27 | LOOKUP_MEMBERSHIP, | |
28 | _LOOKUP_WHAT_MAX, | |
29 | } LookupWhat; | |
30 | ||
31 | struct UserDBIterator { | |
32 | LookupWhat what; | |
7c674191 | 33 | UserDBFlags flags; |
ec8e4a0e LP |
34 | Set *links; |
35 | bool nss_covered:1; | |
36 | bool nss_iterating:1; | |
85f088ab | 37 | bool dropin_covered:1; |
ec8e4a0e LP |
38 | bool synthesize_root:1; |
39 | bool synthesize_nobody:1; | |
037b0a47 | 40 | bool nss_systemd_blocked:1; |
85f088ab LP |
41 | char **dropins; |
42 | size_t current_dropin; | |
ec8e4a0e | 43 | int error; |
ec8e4a0e LP |
44 | unsigned n_found; |
45 | sd_event *event; | |
46 | UserRecord *found_user; /* when .what == LOOKUP_USER */ | |
47 | GroupRecord *found_group; /* when .what == LOOKUP_GROUP */ | |
48 | ||
49 | char *found_user_name, *found_group_name; /* when .what == LOOKUP_MEMBERSHIP */ | |
50 | char **members_of_group; | |
51 | size_t index_members_of_group; | |
85f088ab | 52 | char *filter_user_name, *filter_group_name; |
ec8e4a0e LP |
53 | }; |
54 | ||
55 | UserDBIterator* userdb_iterator_free(UserDBIterator *iterator) { | |
56 | if (!iterator) | |
57 | return NULL; | |
58 | ||
59 | set_free(iterator->links); | |
85f088ab | 60 | strv_free(iterator->dropins); |
ec8e4a0e LP |
61 | |
62 | switch (iterator->what) { | |
63 | ||
64 | case LOOKUP_USER: | |
65 | user_record_unref(iterator->found_user); | |
66 | ||
67 | if (iterator->nss_iterating) | |
68 | endpwent(); | |
69 | ||
70 | break; | |
71 | ||
72 | case LOOKUP_GROUP: | |
73 | group_record_unref(iterator->found_group); | |
74 | ||
75 | if (iterator->nss_iterating) | |
76 | endgrent(); | |
77 | ||
78 | break; | |
79 | ||
80 | case LOOKUP_MEMBERSHIP: | |
81 | free(iterator->found_user_name); | |
82 | free(iterator->found_group_name); | |
83 | strv_free(iterator->members_of_group); | |
84 | free(iterator->filter_user_name); | |
85f088ab | 85 | free(iterator->filter_group_name); |
ec8e4a0e LP |
86 | |
87 | if (iterator->nss_iterating) | |
88 | endgrent(); | |
89 | ||
90 | break; | |
91 | ||
92 | default: | |
04499a70 | 93 | assert_not_reached(); |
ec8e4a0e LP |
94 | } |
95 | ||
96 | sd_event_unref(iterator->event); | |
037b0a47 LP |
97 | |
98 | if (iterator->nss_systemd_blocked) | |
99 | assert_se(userdb_block_nss_systemd(false) >= 0); | |
ec8e4a0e LP |
100 | |
101 | return mfree(iterator); | |
102 | } | |
103 | ||
7c674191 | 104 | static UserDBIterator* userdb_iterator_new(LookupWhat what, UserDBFlags flags) { |
ec8e4a0e LP |
105 | UserDBIterator *i; |
106 | ||
107 | assert(what >= 0); | |
108 | assert(what < _LOOKUP_WHAT_MAX); | |
109 | ||
110 | i = new(UserDBIterator, 1); | |
111 | if (!i) | |
112 | return NULL; | |
113 | ||
114 | *i = (UserDBIterator) { | |
115 | .what = what, | |
7c674191 | 116 | .flags = flags, |
40fb3503 LP |
117 | .synthesize_root = !FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE), |
118 | .synthesize_nobody = !FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE), | |
ec8e4a0e LP |
119 | }; |
120 | ||
121 | return i; | |
122 | } | |
123 | ||
037b0a47 LP |
124 | static int userdb_iterator_block_nss_systemd(UserDBIterator *iterator) { |
125 | int r; | |
126 | ||
127 | assert(iterator); | |
128 | ||
129 | if (iterator->nss_systemd_blocked) | |
130 | return 0; | |
131 | ||
132 | r = userdb_block_nss_systemd(true); | |
133 | if (r < 0) | |
134 | return r; | |
135 | ||
136 | iterator->nss_systemd_blocked = true; | |
137 | return 1; | |
138 | } | |
139 | ||
ec8e4a0e LP |
140 | struct user_group_data { |
141 | JsonVariant *record; | |
142 | bool incomplete; | |
143 | }; | |
144 | ||
145 | static void user_group_data_release(struct user_group_data *d) { | |
146 | json_variant_unref(d->record); | |
147 | } | |
148 | ||
149 | static int userdb_on_query_reply( | |
150 | Varlink *link, | |
151 | JsonVariant *parameters, | |
152 | const char *error_id, | |
153 | VarlinkReplyFlags flags, | |
154 | void *userdata) { | |
155 | ||
156 | UserDBIterator *iterator = userdata; | |
157 | int r; | |
158 | ||
159 | assert(iterator); | |
160 | ||
161 | if (error_id) { | |
162 | log_debug("Got lookup error: %s", error_id); | |
163 | ||
164 | if (STR_IN_SET(error_id, | |
165 | "io.systemd.UserDatabase.NoRecordFound", | |
166 | "io.systemd.UserDatabase.ConflictingRecordFound")) | |
167 | r = -ESRCH; | |
168 | else if (streq(error_id, "io.systemd.UserDatabase.ServiceNotAvailable")) | |
169 | r = -EHOSTDOWN; | |
56870d32 LP |
170 | else if (streq(error_id, "io.systemd.UserDatabase.EnumerationNotSupported")) |
171 | r = -EOPNOTSUPP; | |
ec8e4a0e LP |
172 | else if (streq(error_id, VARLINK_ERROR_TIMEOUT)) |
173 | r = -ETIMEDOUT; | |
174 | else | |
175 | r = -EIO; | |
176 | ||
177 | goto finish; | |
178 | } | |
179 | ||
180 | switch (iterator->what) { | |
181 | ||
182 | case LOOKUP_USER: { | |
183 | _cleanup_(user_group_data_release) struct user_group_data user_data = {}; | |
184 | ||
185 | static const JsonDispatch dispatch_table[] = { | |
186 | { "record", _JSON_VARIANT_TYPE_INVALID, json_dispatch_variant, offsetof(struct user_group_data, record), 0 }, | |
187 | { "incomplete", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(struct user_group_data, incomplete), 0 }, | |
188 | {} | |
189 | }; | |
190 | _cleanup_(user_record_unrefp) UserRecord *hr = NULL; | |
191 | ||
192 | assert_se(!iterator->found_user); | |
193 | ||
194 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &user_data); | |
195 | if (r < 0) | |
196 | goto finish; | |
197 | ||
198 | if (!user_data.record) { | |
199 | r = log_debug_errno(SYNTHETIC_ERRNO(EIO), "Reply is missing record key"); | |
200 | goto finish; | |
201 | } | |
202 | ||
203 | hr = user_record_new(); | |
204 | if (!hr) { | |
205 | r = -ENOMEM; | |
206 | goto finish; | |
207 | } | |
208 | ||
209 | r = user_record_load(hr, user_data.record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE); | |
210 | if (r < 0) | |
211 | goto finish; | |
212 | ||
213 | if (!hr->service) { | |
214 | r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "User record does not carry service information, refusing."); | |
215 | goto finish; | |
216 | } | |
217 | ||
218 | hr->incomplete = user_data.incomplete; | |
219 | ||
220 | /* We match the root user by the name since the name is our primary key. We match the nobody | |
221 | * use by UID though, since the name might differ on OSes */ | |
222 | if (streq_ptr(hr->user_name, "root")) | |
223 | iterator->synthesize_root = false; | |
224 | if (hr->uid == UID_NOBODY) | |
225 | iterator->synthesize_nobody = false; | |
226 | ||
227 | iterator->found_user = TAKE_PTR(hr); | |
228 | iterator->n_found++; | |
229 | ||
230 | /* More stuff coming? then let's just exit cleanly here */ | |
231 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
232 | return 0; | |
233 | ||
234 | /* Otherwise, let's remove this link and exit cleanly then */ | |
235 | r = 0; | |
236 | goto finish; | |
237 | } | |
238 | ||
239 | case LOOKUP_GROUP: { | |
240 | _cleanup_(user_group_data_release) struct user_group_data group_data = {}; | |
241 | ||
242 | static const JsonDispatch dispatch_table[] = { | |
243 | { "record", _JSON_VARIANT_TYPE_INVALID, json_dispatch_variant, offsetof(struct user_group_data, record), 0 }, | |
244 | { "incomplete", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(struct user_group_data, incomplete), 0 }, | |
245 | {} | |
246 | }; | |
247 | _cleanup_(group_record_unrefp) GroupRecord *g = NULL; | |
248 | ||
249 | assert_se(!iterator->found_group); | |
250 | ||
251 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &group_data); | |
252 | if (r < 0) | |
253 | goto finish; | |
254 | ||
255 | if (!group_data.record) { | |
256 | r = log_debug_errno(SYNTHETIC_ERRNO(EIO), "Reply is missing record key"); | |
257 | goto finish; | |
258 | } | |
259 | ||
260 | g = group_record_new(); | |
261 | if (!g) { | |
262 | r = -ENOMEM; | |
263 | goto finish; | |
264 | } | |
265 | ||
266 | r = group_record_load(g, group_data.record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE); | |
267 | if (r < 0) | |
268 | goto finish; | |
269 | ||
270 | if (!g->service) { | |
271 | r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Group record does not carry service information, refusing."); | |
272 | goto finish; | |
273 | } | |
274 | ||
275 | g->incomplete = group_data.incomplete; | |
276 | ||
277 | if (streq_ptr(g->group_name, "root")) | |
278 | iterator->synthesize_root = false; | |
279 | if (g->gid == GID_NOBODY) | |
280 | iterator->synthesize_nobody = false; | |
281 | ||
282 | iterator->found_group = TAKE_PTR(g); | |
283 | iterator->n_found++; | |
284 | ||
285 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
286 | return 0; | |
287 | ||
288 | r = 0; | |
289 | goto finish; | |
290 | } | |
291 | ||
292 | case LOOKUP_MEMBERSHIP: { | |
293 | struct membership_data { | |
294 | const char *user_name; | |
295 | const char *group_name; | |
296 | } membership_data = {}; | |
297 | ||
298 | static const JsonDispatch dispatch_table[] = { | |
299 | { "userName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(struct membership_data, user_name), JSON_SAFE }, | |
300 | { "groupName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(struct membership_data, group_name), JSON_SAFE }, | |
301 | {} | |
302 | }; | |
303 | ||
304 | assert(!iterator->found_user_name); | |
305 | assert(!iterator->found_group_name); | |
306 | ||
307 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &membership_data); | |
308 | if (r < 0) | |
309 | goto finish; | |
310 | ||
311 | iterator->found_user_name = mfree(iterator->found_user_name); | |
312 | iterator->found_group_name = mfree(iterator->found_group_name); | |
313 | ||
314 | iterator->found_user_name = strdup(membership_data.user_name); | |
315 | if (!iterator->found_user_name) { | |
316 | r = -ENOMEM; | |
317 | goto finish; | |
318 | } | |
319 | ||
320 | iterator->found_group_name = strdup(membership_data.group_name); | |
321 | if (!iterator->found_group_name) { | |
322 | r = -ENOMEM; | |
323 | goto finish; | |
324 | } | |
325 | ||
326 | iterator->n_found++; | |
327 | ||
328 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
329 | return 0; | |
330 | ||
331 | r = 0; | |
332 | goto finish; | |
333 | } | |
334 | ||
335 | default: | |
04499a70 | 336 | assert_not_reached(); |
ec8e4a0e LP |
337 | } |
338 | ||
339 | finish: | |
340 | /* If we got one ESRCH, let that win. This way when we do a wild dump we won't be tripped up by bad | |
341 | * errors if at least one connection ended cleanly */ | |
342 | if (r == -ESRCH || iterator->error == 0) | |
343 | iterator->error = -r; | |
344 | ||
345 | assert_se(set_remove(iterator->links, link) == link); | |
346 | link = varlink_unref(link); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int userdb_connect( | |
351 | UserDBIterator *iterator, | |
352 | const char *path, | |
353 | const char *method, | |
354 | bool more, | |
355 | JsonVariant *query) { | |
356 | ||
357 | _cleanup_(varlink_unrefp) Varlink *vl = NULL; | |
358 | int r; | |
359 | ||
360 | assert(iterator); | |
361 | assert(path); | |
362 | assert(method); | |
363 | ||
364 | r = varlink_connect_address(&vl, path); | |
365 | if (r < 0) | |
366 | return log_debug_errno(r, "Unable to connect to %s: %m", path); | |
367 | ||
368 | varlink_set_userdata(vl, iterator); | |
369 | ||
370 | if (!iterator->event) { | |
371 | r = sd_event_new(&iterator->event); | |
372 | if (r < 0) | |
373 | return log_debug_errno(r, "Unable to allocate event loop: %m"); | |
374 | } | |
375 | ||
376 | r = varlink_attach_event(vl, iterator->event, SD_EVENT_PRIORITY_NORMAL); | |
377 | if (r < 0) | |
378 | return log_debug_errno(r, "Failed to attach varlink connection to event loop: %m"); | |
379 | ||
380 | (void) varlink_set_description(vl, path); | |
381 | ||
382 | r = varlink_bind_reply(vl, userdb_on_query_reply); | |
383 | if (r < 0) | |
384 | return log_debug_errno(r, "Failed to bind reply callback: %m"); | |
385 | ||
386 | if (more) | |
387 | r = varlink_observe(vl, method, query); | |
388 | else | |
389 | r = varlink_invoke(vl, method, query); | |
390 | if (r < 0) | |
391 | return log_debug_errno(r, "Failed to invoke varlink method: %m"); | |
392 | ||
35e601d4 | 393 | r = set_ensure_consume(&iterator->links, &link_hash_ops, TAKE_PTR(vl)); |
ec8e4a0e LP |
394 | if (r < 0) |
395 | return log_debug_errno(r, "Failed to add varlink connection to set: %m"); | |
ec8e4a0e LP |
396 | return r; |
397 | } | |
398 | ||
399 | static int userdb_start_query( | |
400 | UserDBIterator *iterator, | |
401 | const char *method, | |
402 | bool more, | |
403 | JsonVariant *query, | |
404 | UserDBFlags flags) { | |
405 | ||
406 | _cleanup_(strv_freep) char **except = NULL, **only = NULL; | |
407 | _cleanup_(closedirp) DIR *d = NULL; | |
408 | struct dirent *de; | |
409 | const char *e; | |
410 | int r, ret = 0; | |
411 | ||
412 | assert(iterator); | |
413 | assert(method); | |
414 | ||
b2148254 LP |
415 | if (FLAGS_SET(flags, USERDB_EXCLUDE_VARLINK)) |
416 | return -ENOLINK; | |
417 | ||
ec8e4a0e LP |
418 | e = getenv("SYSTEMD_BYPASS_USERDB"); |
419 | if (e) { | |
420 | r = parse_boolean(e); | |
421 | if (r > 0) | |
422 | return -ENOLINK; | |
423 | if (r < 0) { | |
424 | except = strv_split(e, ":"); | |
425 | if (!except) | |
426 | return -ENOMEM; | |
427 | } | |
428 | } | |
429 | ||
430 | e = getenv("SYSTEMD_ONLY_USERDB"); | |
431 | if (e) { | |
432 | only = strv_split(e, ":"); | |
433 | if (!only) | |
434 | return -ENOMEM; | |
435 | } | |
436 | ||
437 | /* First, let's talk to the multiplexer, if we can */ | |
85f088ab | 438 | if ((flags & (USERDB_AVOID_MULTIPLEXER|USERDB_EXCLUDE_DYNAMIC_USER|USERDB_EXCLUDE_NSS|USERDB_EXCLUDE_DROPIN|USERDB_DONT_SYNTHESIZE)) == 0 && |
ec8e4a0e LP |
439 | !strv_contains(except, "io.systemd.Multiplexer") && |
440 | (!only || strv_contains(only, "io.systemd.Multiplexer"))) { | |
441 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = json_variant_ref(query); | |
442 | ||
443 | r = json_variant_set_field_string(&patched_query, "service", "io.systemd.Multiplexer"); | |
444 | if (r < 0) | |
445 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
446 | ||
447 | r = userdb_connect(iterator, "/run/systemd/userdb/io.systemd.Multiplexer", method, more, patched_query); | |
448 | if (r >= 0) { | |
449 | iterator->nss_covered = true; /* The multiplexer does NSS */ | |
85f088ab | 450 | iterator->dropin_covered = true; /* It also handles drop-in stuff */ |
ec8e4a0e LP |
451 | return 0; |
452 | } | |
453 | } | |
454 | ||
455 | d = opendir("/run/systemd/userdb/"); | |
456 | if (!d) { | |
457 | if (errno == ENOENT) | |
458 | return -ESRCH; | |
459 | ||
460 | return -errno; | |
461 | } | |
462 | ||
463 | FOREACH_DIRENT(de, d, return -errno) { | |
464 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = NULL; | |
465 | _cleanup_free_ char *p = NULL; | |
85f088ab | 466 | bool is_nss, is_dropin; |
ec8e4a0e LP |
467 | |
468 | if (streq(de->d_name, "io.systemd.Multiplexer")) /* We already tried this above, don't try this again */ | |
469 | continue; | |
470 | ||
80d88a82 | 471 | if (FLAGS_SET(flags, USERDB_EXCLUDE_DYNAMIC_USER) && |
ec8e4a0e LP |
472 | streq(de->d_name, "io.systemd.DynamicUser")) |
473 | continue; | |
474 | ||
475 | /* Avoid NSS is this is requested. Note that we also skip NSS when we were asked to skip the | |
476 | * multiplexer, since in that case it's safer to do NSS in the client side emulation below | |
477 | * (and when we run as part of systemd-userdbd.service we don't want to talk to ourselves | |
478 | * anyway). */ | |
479 | is_nss = streq(de->d_name, "io.systemd.NameServiceSwitch"); | |
80d88a82 | 480 | if ((flags & (USERDB_EXCLUDE_NSS|USERDB_AVOID_MULTIPLEXER)) && is_nss) |
ec8e4a0e LP |
481 | continue; |
482 | ||
85f088ab LP |
483 | /* Similar for the drop-in service */ |
484 | is_dropin = streq(de->d_name, "io.systemd.DropIn"); | |
485 | if ((flags & (USERDB_EXCLUDE_DROPIN|USERDB_AVOID_MULTIPLEXER)) && is_dropin) | |
486 | continue; | |
487 | ||
ec8e4a0e LP |
488 | if (strv_contains(except, de->d_name)) |
489 | continue; | |
490 | ||
491 | if (only && !strv_contains(only, de->d_name)) | |
492 | continue; | |
493 | ||
494 | p = path_join("/run/systemd/userdb/", de->d_name); | |
495 | if (!p) | |
496 | return -ENOMEM; | |
497 | ||
498 | patched_query = json_variant_ref(query); | |
499 | r = json_variant_set_field_string(&patched_query, "service", de->d_name); | |
500 | if (r < 0) | |
501 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
502 | ||
503 | r = userdb_connect(iterator, p, method, more, patched_query); | |
85f088ab LP |
504 | if (is_nss && r >= 0) /* Turn off fallback NSS + dropin if we found the NSS/dropin service |
505 | * and could connect to it */ | |
ec8e4a0e | 506 | iterator->nss_covered = true; |
85f088ab LP |
507 | if (is_dropin && r >= 0) |
508 | iterator->dropin_covered = true; | |
ec8e4a0e LP |
509 | |
510 | if (ret == 0 && r < 0) | |
511 | ret = r; | |
512 | } | |
513 | ||
514 | if (set_isempty(iterator->links)) | |
58dbf4c9 | 515 | return ret < 0 ? ret : -ESRCH; /* propagate last error we saw if we couldn't connect to anything. */ |
ec8e4a0e LP |
516 | |
517 | /* We connected to some services, in this case, ignore the ones we failed on */ | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static int userdb_process( | |
522 | UserDBIterator *iterator, | |
523 | UserRecord **ret_user_record, | |
524 | GroupRecord **ret_group_record, | |
525 | char **ret_user_name, | |
526 | char **ret_group_name) { | |
527 | ||
528 | int r; | |
529 | ||
530 | assert(iterator); | |
531 | ||
532 | for (;;) { | |
533 | if (iterator->what == LOOKUP_USER && iterator->found_user) { | |
534 | if (ret_user_record) | |
535 | *ret_user_record = TAKE_PTR(iterator->found_user); | |
536 | else | |
537 | iterator->found_user = user_record_unref(iterator->found_user); | |
538 | ||
539 | if (ret_group_record) | |
540 | *ret_group_record = NULL; | |
541 | if (ret_user_name) | |
542 | *ret_user_name = NULL; | |
543 | if (ret_group_name) | |
544 | *ret_group_name = NULL; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | if (iterator->what == LOOKUP_GROUP && iterator->found_group) { | |
550 | if (ret_group_record) | |
551 | *ret_group_record = TAKE_PTR(iterator->found_group); | |
552 | else | |
553 | iterator->found_group = group_record_unref(iterator->found_group); | |
554 | ||
555 | if (ret_user_record) | |
556 | *ret_user_record = NULL; | |
557 | if (ret_user_name) | |
558 | *ret_user_name = NULL; | |
559 | if (ret_group_name) | |
560 | *ret_group_name = NULL; | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
565 | if (iterator->what == LOOKUP_MEMBERSHIP && iterator->found_user_name && iterator->found_group_name) { | |
566 | if (ret_user_name) | |
567 | *ret_user_name = TAKE_PTR(iterator->found_user_name); | |
568 | else | |
569 | iterator->found_user_name = mfree(iterator->found_user_name); | |
570 | ||
571 | if (ret_group_name) | |
572 | *ret_group_name = TAKE_PTR(iterator->found_group_name); | |
573 | else | |
574 | iterator->found_group_name = mfree(iterator->found_group_name); | |
575 | ||
576 | if (ret_user_record) | |
577 | *ret_user_record = NULL; | |
578 | if (ret_group_record) | |
579 | *ret_group_record = NULL; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | if (set_isempty(iterator->links)) { | |
585 | if (iterator->error == 0) | |
586 | return -ESRCH; | |
587 | ||
588 | return -abs(iterator->error); | |
589 | } | |
590 | ||
591 | if (!iterator->event) | |
592 | return -ESRCH; | |
593 | ||
594 | r = sd_event_run(iterator->event, UINT64_MAX); | |
595 | if (r < 0) | |
596 | return r; | |
597 | } | |
598 | } | |
599 | ||
600 | static int synthetic_root_user_build(UserRecord **ret) { | |
601 | return user_record_build( | |
602 | ret, | |
603 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING("root")), | |
604 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(0)), | |
605 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), | |
606 | JSON_BUILD_PAIR("homeDirectory", JSON_BUILD_STRING("/root")), | |
607 | JSON_BUILD_PAIR("disposition", JSON_BUILD_STRING("intrinsic")))); | |
608 | } | |
609 | ||
610 | static int synthetic_nobody_user_build(UserRecord **ret) { | |
611 | return user_record_build( | |
612 | ret, | |
613 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(NOBODY_USER_NAME)), | |
614 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(UID_NOBODY)), | |
615 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), | |
616 | JSON_BUILD_PAIR("shell", JSON_BUILD_STRING(NOLOGIN)), | |
617 | JSON_BUILD_PAIR("locked", JSON_BUILD_BOOLEAN(true)), | |
618 | JSON_BUILD_PAIR("disposition", JSON_BUILD_STRING("intrinsic")))); | |
619 | } | |
620 | ||
621 | int userdb_by_name(const char *name, UserDBFlags flags, UserRecord **ret) { | |
622 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
623 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
624 | int r; | |
625 | ||
7a8867ab | 626 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
627 | return -EINVAL; |
628 | ||
629 | r = json_build(&query, JSON_BUILD_OBJECT( | |
630 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
631 | if (r < 0) | |
632 | return r; | |
633 | ||
7c674191 | 634 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
635 | if (!iterator) |
636 | return -ENOMEM; | |
637 | ||
638 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
639 | if (r >= 0) { | |
640 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
641 | if (r >= 0) | |
642 | return r; | |
643 | } | |
644 | ||
85f088ab LP |
645 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
646 | r = dropin_user_record_by_name(name, NULL, flags, ret); | |
647 | if (r >= 0) | |
648 | return r; | |
649 | } | |
650 | ||
80d88a82 | 651 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 | 652 | /* Make sure the NSS lookup doesn't recurse back to us. */ |
ec8e4a0e | 653 | |
037b0a47 LP |
654 | r = userdb_iterator_block_nss_systemd(iterator); |
655 | if (r >= 0) { | |
ec8e4a0e | 656 | /* Client-side NSS fallback */ |
80d88a82 | 657 | r = nss_user_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
658 | if (r >= 0) |
659 | return r; | |
660 | } | |
661 | } | |
662 | ||
663 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
664 | if (streq(name, "root")) | |
665 | return synthetic_root_user_build(ret); | |
666 | ||
667 | if (streq(name, NOBODY_USER_NAME) && synthesize_nobody()) | |
668 | return synthetic_nobody_user_build(ret); | |
669 | } | |
670 | ||
671 | return r; | |
672 | } | |
673 | ||
674 | int userdb_by_uid(uid_t uid, UserDBFlags flags, UserRecord **ret) { | |
675 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
676 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
677 | int r; | |
678 | ||
679 | if (!uid_is_valid(uid)) | |
680 | return -EINVAL; | |
681 | ||
682 | r = json_build(&query, JSON_BUILD_OBJECT( | |
683 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(uid)))); | |
684 | if (r < 0) | |
685 | return r; | |
686 | ||
7c674191 | 687 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
688 | if (!iterator) |
689 | return -ENOMEM; | |
690 | ||
691 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
692 | if (r >= 0) { | |
693 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
694 | if (r >= 0) | |
695 | return r; | |
696 | } | |
697 | ||
85f088ab LP |
698 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
699 | r = dropin_user_record_by_uid(uid, NULL, flags, ret); | |
700 | if (r >= 0) | |
701 | return r; | |
702 | } | |
703 | ||
80d88a82 | 704 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 LP |
705 | r = userdb_iterator_block_nss_systemd(iterator); |
706 | if (r >= 0) { | |
ec8e4a0e | 707 | /* Client-side NSS fallback */ |
80d88a82 | 708 | r = nss_user_record_by_uid(uid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
709 | if (r >= 0) |
710 | return r; | |
711 | } | |
712 | } | |
713 | ||
714 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
715 | if (uid == 0) | |
716 | return synthetic_root_user_build(ret); | |
717 | ||
718 | if (uid == UID_NOBODY && synthesize_nobody()) | |
719 | return synthetic_nobody_user_build(ret); | |
720 | } | |
721 | ||
722 | return r; | |
723 | } | |
724 | ||
725 | int userdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
726 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 727 | int r, qr; |
ec8e4a0e LP |
728 | |
729 | assert(ret); | |
730 | ||
7c674191 | 731 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
732 | if (!iterator) |
733 | return -ENOMEM; | |
734 | ||
85f088ab | 735 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", true, NULL, flags); |
ec8e4a0e | 736 | |
85f088ab | 737 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
738 | r = userdb_iterator_block_nss_systemd(iterator); |
739 | if (r < 0) | |
740 | return r; | |
ec8e4a0e LP |
741 | |
742 | setpwent(); | |
743 | iterator->nss_iterating = true; | |
85f088ab LP |
744 | } |
745 | ||
746 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
747 | r = conf_files_list_nulstr( | |
748 | &iterator->dropins, | |
749 | ".user", | |
750 | NULL, | |
751 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
752 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
753 | if (r < 0) | |
754 | log_debug_errno(r, "Failed to find user drop-ins, ignoring: %m"); | |
755 | } | |
756 | ||
757 | /* propagate IPC error, but only if there are no drop-ins */ | |
758 | if (qr < 0 && | |
759 | !iterator->nss_iterating && | |
760 | strv_isempty(iterator->dropins)) | |
761 | return qr; | |
ec8e4a0e | 762 | |
ec8e4a0e LP |
763 | *ret = TAKE_PTR(iterator); |
764 | return 0; | |
765 | } | |
766 | ||
767 | int userdb_iterator_get(UserDBIterator *iterator, UserRecord **ret) { | |
768 | int r; | |
769 | ||
770 | assert(iterator); | |
771 | assert(iterator->what == LOOKUP_USER); | |
772 | ||
773 | if (iterator->nss_iterating) { | |
774 | struct passwd *pw; | |
775 | ||
776 | /* If NSS isn't covered elsewhere, let's iterate through it first, since it probably contains | |
777 | * the more traditional sources, which are probably good to show first. */ | |
778 | ||
779 | pw = getpwent(); | |
780 | if (pw) { | |
781 | _cleanup_free_ char *buffer = NULL; | |
782 | bool incomplete = false; | |
783 | struct spwd spwd; | |
784 | ||
785 | if (streq_ptr(pw->pw_name, "root")) | |
786 | iterator->synthesize_root = false; | |
787 | if (pw->pw_uid == UID_NOBODY) | |
788 | iterator->synthesize_nobody = false; | |
789 | ||
80d88a82 | 790 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
791 | r = nss_spwd_for_passwd(pw, &spwd, &buffer); |
792 | if (r < 0) { | |
793 | log_debug_errno(r, "Failed to acquire shadow entry for user %s, ignoring: %m", pw->pw_name); | |
794 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
795 | } | |
796 | } else { | |
797 | r = -EUCLEAN; | |
798 | incomplete = true; | |
ec8e4a0e LP |
799 | } |
800 | ||
801 | r = nss_passwd_to_user_record(pw, r >= 0 ? &spwd : NULL, ret); | |
802 | if (r < 0) | |
803 | return r; | |
804 | ||
805 | if (ret) | |
806 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
807 | |
808 | iterator->n_found++; | |
ec8e4a0e LP |
809 | return r; |
810 | } | |
811 | ||
812 | if (errno != 0) | |
813 | log_debug_errno(errno, "Failure to iterate NSS user database, ignoring: %m"); | |
814 | ||
815 | iterator->nss_iterating = false; | |
816 | endpwent(); | |
817 | } | |
818 | ||
85f088ab LP |
819 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
820 | const char *i = iterator->dropins[iterator->current_dropin]; | |
821 | _cleanup_free_ char *fn = NULL; | |
822 | uid_t uid; | |
823 | char *e; | |
ec8e4a0e | 824 | |
85f088ab LP |
825 | /* Next, let's add in the static drop-ins, which are quick to retrieve */ |
826 | ||
827 | r = path_extract_filename(i, &fn); | |
828 | if (r < 0) | |
829 | return r; | |
830 | ||
831 | e = endswith(fn, ".user"); /* not actually a .user file? Then skip to next */ | |
832 | if (!e) | |
833 | continue; | |
834 | ||
835 | *e = 0; /* Chop off suffix */ | |
836 | ||
837 | if (parse_uid(fn, &uid) < 0) /* not a UID .user file? Then skip to next */ | |
838 | continue; | |
839 | ||
840 | r = dropin_user_record_by_uid(uid, i, iterator->flags, ret); | |
841 | if (r < 0) { | |
842 | log_debug_errno(r, "Failed to parse user record for UID " UID_FMT ", ignoring: %m", uid); | |
843 | continue; /* If we failed to parse this record, let's suppress it from enumeration, | |
844 | * and continue with the next record. Maybe someone is dropping it files | |
845 | * and only partially wrote this one. */ | |
846 | } | |
847 | ||
848 | iterator->current_dropin++; /* make sure on the next call of userdb_iterator_get() we continue with the next dropin */ | |
849 | iterator->n_found++; | |
850 | return 0; | |
851 | } | |
852 | ||
853 | /* Then, let's return the users provided by varlink IPC */ | |
854 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
ec8e4a0e | 855 | if (r < 0) { |
85f088ab LP |
856 | |
857 | /* Finally, synthesize root + nobody if not done yet */ | |
ec8e4a0e LP |
858 | if (iterator->synthesize_root) { |
859 | iterator->synthesize_root = false; | |
860 | iterator->n_found++; | |
861 | return synthetic_root_user_build(ret); | |
862 | } | |
863 | ||
864 | if (iterator->synthesize_nobody) { | |
865 | iterator->synthesize_nobody = false; | |
866 | iterator->n_found++; | |
867 | return synthetic_nobody_user_build(ret); | |
868 | } | |
ec8e4a0e | 869 | |
77fe7d15 LP |
870 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
871 | if (iterator->n_found > 0) | |
872 | return -ESRCH; | |
873 | } | |
ec8e4a0e LP |
874 | |
875 | return r; | |
876 | } | |
877 | ||
878 | static int synthetic_root_group_build(GroupRecord **ret) { | |
879 | return group_record_build( | |
880 | ret, | |
881 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING("root")), | |
882 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), | |
883 | JSON_BUILD_PAIR("disposition", JSON_BUILD_STRING("intrinsic")))); | |
884 | } | |
885 | ||
886 | static int synthetic_nobody_group_build(GroupRecord **ret) { | |
887 | return group_record_build( | |
888 | ret, | |
889 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(NOBODY_GROUP_NAME)), | |
890 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), | |
891 | JSON_BUILD_PAIR("disposition", JSON_BUILD_STRING("intrinsic")))); | |
892 | } | |
893 | ||
894 | int groupdb_by_name(const char *name, UserDBFlags flags, GroupRecord **ret) { | |
895 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
896 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
897 | int r; | |
898 | ||
7a8867ab | 899 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
900 | return -EINVAL; |
901 | ||
902 | r = json_build(&query, JSON_BUILD_OBJECT( | |
903 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
904 | if (r < 0) | |
905 | return r; | |
906 | ||
7c674191 | 907 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
908 | if (!iterator) |
909 | return -ENOMEM; | |
910 | ||
911 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
912 | if (r >= 0) { | |
913 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
914 | if (r >= 0) | |
915 | return r; | |
916 | } | |
917 | ||
85f088ab LP |
918 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
919 | r = dropin_group_record_by_name(name, NULL, flags, ret); | |
920 | if (r >= 0) | |
921 | return r; | |
922 | } | |
923 | ||
924 | ||
80d88a82 | 925 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
926 | r = userdb_iterator_block_nss_systemd(iterator); |
927 | if (r >= 0) { | |
80d88a82 | 928 | r = nss_group_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
929 | if (r >= 0) |
930 | return r; | |
931 | } | |
932 | } | |
933 | ||
934 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
935 | if (streq(name, "root")) | |
936 | return synthetic_root_group_build(ret); | |
937 | ||
938 | if (streq(name, NOBODY_GROUP_NAME) && synthesize_nobody()) | |
939 | return synthetic_nobody_group_build(ret); | |
940 | } | |
941 | ||
942 | return r; | |
943 | } | |
944 | ||
945 | int groupdb_by_gid(gid_t gid, UserDBFlags flags, GroupRecord **ret) { | |
946 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
947 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
948 | int r; | |
949 | ||
950 | if (!gid_is_valid(gid)) | |
951 | return -EINVAL; | |
952 | ||
953 | r = json_build(&query, JSON_BUILD_OBJECT( | |
954 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(gid)))); | |
955 | if (r < 0) | |
956 | return r; | |
957 | ||
7c674191 | 958 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
959 | if (!iterator) |
960 | return -ENOMEM; | |
961 | ||
962 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
963 | if (r >= 0) { | |
964 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
965 | if (r >= 0) | |
966 | return r; | |
967 | } | |
968 | ||
85f088ab LP |
969 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
970 | r = dropin_group_record_by_gid(gid, NULL, flags, ret); | |
971 | if (r >= 0) | |
972 | return r; | |
973 | } | |
974 | ||
80d88a82 | 975 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
976 | r = userdb_iterator_block_nss_systemd(iterator); |
977 | if (r >= 0) { | |
80d88a82 | 978 | r = nss_group_record_by_gid(gid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
979 | if (r >= 0) |
980 | return r; | |
981 | } | |
982 | } | |
983 | ||
984 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
985 | if (gid == 0) | |
986 | return synthetic_root_group_build(ret); | |
987 | ||
988 | if (gid == GID_NOBODY && synthesize_nobody()) | |
989 | return synthetic_nobody_group_build(ret); | |
990 | } | |
991 | ||
992 | return r; | |
993 | } | |
994 | ||
995 | int groupdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
996 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 997 | int r, qr; |
ec8e4a0e LP |
998 | |
999 | assert(ret); | |
1000 | ||
7c674191 | 1001 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
1002 | if (!iterator) |
1003 | return -ENOMEM; | |
1004 | ||
85f088ab | 1005 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", true, NULL, flags); |
ec8e4a0e | 1006 | |
85f088ab | 1007 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
1008 | r = userdb_iterator_block_nss_systemd(iterator); |
1009 | if (r < 0) | |
1010 | return r; | |
ec8e4a0e LP |
1011 | |
1012 | setgrent(); | |
1013 | iterator->nss_iterating = true; | |
85f088ab LP |
1014 | } |
1015 | ||
1016 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
1017 | r = conf_files_list_nulstr( | |
1018 | &iterator->dropins, | |
1019 | ".group", | |
1020 | NULL, | |
1021 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
1022 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1023 | if (r < 0) | |
1024 | log_debug_errno(r, "Failed to find group drop-ins, ignoring: %m"); | |
1025 | } | |
1026 | ||
1027 | if (qr < 0 && | |
1028 | !iterator->nss_iterating && | |
1029 | strv_isempty(iterator->dropins)) | |
1030 | return qr; | |
ec8e4a0e | 1031 | |
ec8e4a0e LP |
1032 | *ret = TAKE_PTR(iterator); |
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | int groupdb_iterator_get(UserDBIterator *iterator, GroupRecord **ret) { | |
1037 | int r; | |
1038 | ||
1039 | assert(iterator); | |
1040 | assert(iterator->what == LOOKUP_GROUP); | |
1041 | ||
1042 | if (iterator->nss_iterating) { | |
1043 | struct group *gr; | |
1044 | ||
1045 | errno = 0; | |
1046 | gr = getgrent(); | |
1047 | if (gr) { | |
1048 | _cleanup_free_ char *buffer = NULL; | |
1049 | bool incomplete = false; | |
1050 | struct sgrp sgrp; | |
1051 | ||
1052 | if (streq_ptr(gr->gr_name, "root")) | |
1053 | iterator->synthesize_root = false; | |
1054 | if (gr->gr_gid == GID_NOBODY) | |
1055 | iterator->synthesize_nobody = false; | |
1056 | ||
80d88a82 | 1057 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
1058 | r = nss_sgrp_for_group(gr, &sgrp, &buffer); |
1059 | if (r < 0) { | |
1060 | log_debug_errno(r, "Failed to acquire shadow entry for group %s, ignoring: %m", gr->gr_name); | |
1061 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
1062 | } | |
1063 | } else { | |
1064 | r = -EUCLEAN; | |
1065 | incomplete = true; | |
ec8e4a0e LP |
1066 | } |
1067 | ||
1068 | r = nss_group_to_group_record(gr, r >= 0 ? &sgrp : NULL, ret); | |
1069 | if (r < 0) | |
1070 | return r; | |
1071 | ||
1072 | if (ret) | |
1073 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
1074 | |
1075 | iterator->n_found++; | |
ec8e4a0e LP |
1076 | return r; |
1077 | } | |
1078 | ||
1079 | if (errno != 0) | |
1080 | log_debug_errno(errno, "Failure to iterate NSS group database, ignoring: %m"); | |
1081 | ||
1082 | iterator->nss_iterating = false; | |
1083 | endgrent(); | |
1084 | } | |
1085 | ||
85f088ab LP |
1086 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1087 | const char *i = iterator->dropins[iterator->current_dropin]; | |
1088 | _cleanup_free_ char *fn = NULL; | |
1089 | gid_t gid; | |
1090 | char *e; | |
1091 | ||
1092 | r = path_extract_filename(i, &fn); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | ||
1096 | e = endswith(fn, ".group"); | |
1097 | if (!e) | |
1098 | continue; | |
1099 | ||
1100 | *e = 0; /* Chop off suffix */ | |
1101 | ||
1102 | if (parse_gid(fn, &gid) < 0) | |
1103 | continue; | |
1104 | ||
1105 | r = dropin_group_record_by_gid(gid, i, iterator->flags, ret); | |
1106 | if (r < 0) { | |
1107 | log_debug_errno(r, "Failed to parse group record for GID " GID_FMT ", ignoring: %m", gid); | |
1108 | continue; | |
1109 | } | |
1110 | ||
1111 | iterator->current_dropin++; | |
1112 | iterator->n_found++; | |
1113 | return 0; | |
1114 | } | |
1115 | ||
ec8e4a0e LP |
1116 | r = userdb_process(iterator, NULL, ret, NULL, NULL); |
1117 | if (r < 0) { | |
1118 | if (iterator->synthesize_root) { | |
1119 | iterator->synthesize_root = false; | |
1120 | iterator->n_found++; | |
1121 | return synthetic_root_group_build(ret); | |
1122 | } | |
1123 | ||
1124 | if (iterator->synthesize_nobody) { | |
1125 | iterator->synthesize_nobody = false; | |
1126 | iterator->n_found++; | |
1127 | return synthetic_nobody_group_build(ret); | |
1128 | } | |
ec8e4a0e | 1129 | |
77fe7d15 LP |
1130 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
1131 | if (iterator->n_found > 0) | |
1132 | return -ESRCH; | |
1133 | } | |
ec8e4a0e LP |
1134 | |
1135 | return r; | |
1136 | } | |
1137 | ||
85f088ab LP |
1138 | static void discover_membership_dropins(UserDBIterator *i, UserDBFlags flags) { |
1139 | int r; | |
1140 | ||
1141 | r = conf_files_list_nulstr( | |
1142 | &i->dropins, | |
1143 | ".membership", | |
1144 | NULL, | |
1145 | CONF_FILES_REGULAR|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, | |
1146 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1147 | if (r < 0) | |
1148 | log_debug_errno(r, "Failed to find membership drop-ins, ignoring: %m"); | |
1149 | } | |
1150 | ||
ec8e4a0e LP |
1151 | int membershipdb_by_user(const char *name, UserDBFlags flags, UserDBIterator **ret) { |
1152 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1153 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1154 | int r, qr; |
ec8e4a0e LP |
1155 | |
1156 | assert(ret); | |
1157 | ||
7a8867ab | 1158 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1159 | return -EINVAL; |
1160 | ||
1161 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1162 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
1163 | if (r < 0) | |
1164 | return r; | |
1165 | ||
7c674191 | 1166 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1167 | if (!iterator) |
1168 | return -ENOMEM; | |
1169 | ||
ec8e4a0e LP |
1170 | iterator->filter_user_name = strdup(name); |
1171 | if (!iterator->filter_user_name) | |
1172 | return -ENOMEM; | |
1173 | ||
85f088ab LP |
1174 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
1175 | ||
1176 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { | |
1177 | r = userdb_iterator_block_nss_systemd(iterator); | |
1178 | if (r < 0) | |
1179 | return r; | |
ec8e4a0e | 1180 | |
85f088ab LP |
1181 | setgrent(); |
1182 | iterator->nss_iterating = true; | |
1183 | } | |
ec8e4a0e | 1184 | |
85f088ab LP |
1185 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1186 | discover_membership_dropins(iterator, flags); | |
1187 | ||
1188 | if (qr < 0 && | |
1189 | !iterator->nss_iterating && | |
1190 | strv_isempty(iterator->dropins)) | |
1191 | return qr; | |
1192 | ||
1193 | *ret = TAKE_PTR(iterator); | |
1194 | return 0; | |
ec8e4a0e LP |
1195 | } |
1196 | ||
1197 | int membershipdb_by_group(const char *name, UserDBFlags flags, UserDBIterator **ret) { | |
1198 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1199 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1200 | int r, qr; |
ec8e4a0e LP |
1201 | |
1202 | assert(ret); | |
1203 | ||
7a8867ab | 1204 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1205 | return -EINVAL; |
1206 | ||
1207 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1208 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
1209 | if (r < 0) | |
1210 | return r; | |
1211 | ||
7c674191 | 1212 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1213 | if (!iterator) |
1214 | return -ENOMEM; | |
1215 | ||
85f088ab LP |
1216 | iterator->filter_group_name = strdup(name); |
1217 | if (!iterator->filter_group_name) | |
1218 | return -ENOMEM; | |
ec8e4a0e | 1219 | |
85f088ab | 1220 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
ec8e4a0e | 1221 | |
85f088ab LP |
1222 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1223 | _cleanup_(group_record_unrefp) GroupRecord *gr = NULL; | |
ec8e4a0e | 1224 | |
85f088ab LP |
1225 | r = userdb_iterator_block_nss_systemd(iterator); |
1226 | if (r < 0) | |
1227 | return r; | |
ec8e4a0e | 1228 | |
85f088ab LP |
1229 | /* We ignore all errors here, since the group might be defined by a userdb native service, and we queried them already above. */ |
1230 | (void) nss_group_record_by_name(name, false, &gr); | |
1231 | if (gr) { | |
1232 | iterator->members_of_group = strv_copy(gr->members); | |
1233 | if (!iterator->members_of_group) | |
1234 | return -ENOMEM; | |
1235 | ||
1236 | iterator->index_members_of_group = 0; | |
1237 | ||
1238 | iterator->found_group_name = strdup(name); | |
1239 | if (!iterator->found_group_name) | |
1240 | return -ENOMEM; | |
1241 | } | |
ec8e4a0e LP |
1242 | } |
1243 | ||
85f088ab LP |
1244 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1245 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1246 | |
85f088ab LP |
1247 | if (qr < 0 && |
1248 | strv_isempty(iterator->members_of_group) && | |
1249 | strv_isempty(iterator->dropins)) | |
1250 | return qr; | |
ec8e4a0e | 1251 | |
85f088ab LP |
1252 | *ret = TAKE_PTR(iterator); |
1253 | return 0; | |
ec8e4a0e LP |
1254 | } |
1255 | ||
1256 | int membershipdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
1257 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 1258 | int r, qr; |
ec8e4a0e LP |
1259 | |
1260 | assert(ret); | |
1261 | ||
7c674191 | 1262 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1263 | if (!iterator) |
1264 | return -ENOMEM; | |
1265 | ||
85f088ab | 1266 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, NULL, flags); |
ec8e4a0e | 1267 | |
85f088ab LP |
1268 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1269 | r = userdb_iterator_block_nss_systemd(iterator); | |
1270 | if (r < 0) | |
1271 | return r; | |
ec8e4a0e | 1272 | |
85f088ab LP |
1273 | setgrent(); |
1274 | iterator->nss_iterating = true; | |
1275 | } | |
ec8e4a0e | 1276 | |
85f088ab LP |
1277 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1278 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1279 | |
85f088ab LP |
1280 | if (qr < 0 && |
1281 | !iterator->nss_iterating && | |
1282 | strv_isempty(iterator->dropins)) | |
1283 | return qr; | |
ec8e4a0e | 1284 | |
85f088ab LP |
1285 | *ret = TAKE_PTR(iterator); |
1286 | return 0; | |
ec8e4a0e LP |
1287 | } |
1288 | ||
1289 | int membershipdb_iterator_get( | |
1290 | UserDBIterator *iterator, | |
1291 | char **ret_user, | |
1292 | char **ret_group) { | |
1293 | ||
1294 | int r; | |
1295 | ||
1296 | assert(iterator); | |
1297 | ||
1298 | for (;;) { | |
d9f5f2a1 | 1299 | /* If we are iterating through NSS acquire a new group entry if we haven't acquired one yet. */ |
ec8e4a0e LP |
1300 | if (!iterator->members_of_group) { |
1301 | struct group *g; | |
1302 | ||
1303 | if (!iterator->nss_iterating) | |
1304 | break; | |
1305 | ||
1306 | assert(!iterator->found_user_name); | |
1307 | do { | |
1308 | errno = 0; | |
1309 | g = getgrent(); | |
1310 | if (!g) { | |
1311 | if (errno != 0) | |
1312 | log_debug_errno(errno, "Failure during NSS group iteration, ignoring: %m"); | |
1313 | break; | |
1314 | } | |
1315 | ||
1316 | } while (iterator->filter_user_name ? !strv_contains(g->gr_mem, iterator->filter_user_name) : | |
1317 | strv_isempty(g->gr_mem)); | |
1318 | ||
1319 | if (g) { | |
1320 | r = free_and_strdup(&iterator->found_group_name, g->gr_name); | |
1321 | if (r < 0) | |
1322 | return r; | |
1323 | ||
1324 | if (iterator->filter_user_name) | |
1325 | iterator->members_of_group = strv_new(iterator->filter_user_name); | |
1326 | else | |
1327 | iterator->members_of_group = strv_copy(g->gr_mem); | |
1328 | if (!iterator->members_of_group) | |
1329 | return -ENOMEM; | |
1330 | ||
1331 | iterator->index_members_of_group = 0; | |
1332 | } else { | |
1333 | iterator->nss_iterating = false; | |
1334 | endgrent(); | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | assert(iterator->found_group_name); | |
1340 | assert(iterator->members_of_group); | |
1341 | assert(!iterator->found_user_name); | |
1342 | ||
1343 | if (iterator->members_of_group[iterator->index_members_of_group]) { | |
1344 | _cleanup_free_ char *cu = NULL, *cg = NULL; | |
1345 | ||
1346 | if (ret_user) { | |
1347 | cu = strdup(iterator->members_of_group[iterator->index_members_of_group]); | |
1348 | if (!cu) | |
1349 | return -ENOMEM; | |
1350 | } | |
1351 | ||
1352 | if (ret_group) { | |
1353 | cg = strdup(iterator->found_group_name); | |
1354 | if (!cg) | |
1355 | return -ENOMEM; | |
1356 | } | |
1357 | ||
1358 | if (ret_user) | |
1359 | *ret_user = TAKE_PTR(cu); | |
1360 | ||
1361 | if (ret_group) | |
1362 | *ret_group = TAKE_PTR(cg); | |
1363 | ||
1364 | iterator->index_members_of_group++; | |
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | iterator->members_of_group = strv_free(iterator->members_of_group); | |
1369 | iterator->found_group_name = mfree(iterator->found_group_name); | |
1370 | } | |
1371 | ||
85f088ab LP |
1372 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1373 | const char *i = iterator->dropins[iterator->current_dropin], *e, *c; | |
1374 | _cleanup_free_ char *un = NULL, *gn = NULL; | |
1375 | ||
1376 | e = endswith(i, ".membership"); | |
1377 | if (!e) | |
1378 | continue; | |
1379 | ||
1380 | c = memchr(i, ':', e - i); | |
1381 | if (!c) | |
1382 | continue; | |
1383 | ||
1384 | un = strndup(i, c - i); | |
1385 | if (!un) | |
1386 | return -ENOMEM; | |
1387 | if (iterator->filter_user_name) { | |
1388 | if (!streq(un, iterator->filter_user_name)) | |
1389 | continue; | |
1390 | } else if (!valid_user_group_name(un, VALID_USER_RELAX)) | |
1391 | continue; | |
1392 | ||
1393 | c++; /* skip over ':' */ | |
1394 | gn = strndup(c, e - c); | |
1395 | if (!gn) | |
1396 | return -ENOMEM; | |
1397 | if (iterator->filter_group_name) { | |
1398 | if (!streq(gn, iterator->filter_group_name)) | |
1399 | continue; | |
1400 | } else if (!valid_user_group_name(gn, VALID_USER_RELAX)) | |
1401 | continue; | |
1402 | ||
1403 | iterator->current_dropin++; | |
1404 | iterator->n_found++; | |
1405 | ||
1406 | if (ret_user) | |
1407 | *ret_user = TAKE_PTR(un); | |
1408 | if (ret_group) | |
1409 | *ret_group = TAKE_PTR(gn); | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
ec8e4a0e LP |
1414 | r = userdb_process(iterator, NULL, NULL, ret_user, ret_group); |
1415 | if (r < 0 && iterator->n_found > 0) | |
1416 | return -ESRCH; | |
1417 | ||
1418 | return r; | |
1419 | } | |
1420 | ||
1421 | int membershipdb_by_group_strv(const char *name, UserDBFlags flags, char ***ret) { | |
1422 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1423 | _cleanup_strv_free_ char **members = NULL; | |
1424 | int r; | |
1425 | ||
1426 | assert(name); | |
1427 | assert(ret); | |
1428 | ||
1429 | r = membershipdb_by_group(name, flags, &iterator); | |
1430 | if (r < 0) | |
1431 | return r; | |
1432 | ||
1433 | for (;;) { | |
1434 | _cleanup_free_ char *user_name = NULL; | |
1435 | ||
1436 | r = membershipdb_iterator_get(iterator, &user_name, NULL); | |
1437 | if (r == -ESRCH) | |
1438 | break; | |
1439 | if (r < 0) | |
1440 | return r; | |
1441 | ||
1442 | r = strv_consume(&members, TAKE_PTR(user_name)); | |
1443 | if (r < 0) | |
1444 | return r; | |
1445 | } | |
1446 | ||
1447 | strv_sort(members); | |
1448 | strv_uniq(members); | |
1449 | ||
1450 | *ret = TAKE_PTR(members); | |
1451 | return 0; | |
1452 | } | |
1453 | ||
037b0a47 LP |
1454 | int userdb_block_nss_systemd(int b) { |
1455 | _cleanup_(dlclosep) void *dl = NULL; | |
1456 | int (*call)(bool b); | |
ec8e4a0e | 1457 | |
037b0a47 | 1458 | /* Note that we might be called from libnss_systemd.so.2 itself, but that should be fine, really. */ |
ec8e4a0e | 1459 | |
a127c620 | 1460 | dl = dlopen(ROOTLIBDIR "/libnss_systemd.so.2", RTLD_LAZY|RTLD_NODELETE); |
037b0a47 LP |
1461 | if (!dl) { |
1462 | /* If the file isn't installed, don't complain loudly */ | |
1463 | log_debug("Failed to dlopen(libnss_systemd.so.2), ignoring: %s", dlerror()); | |
1464 | return 0; | |
ec8e4a0e LP |
1465 | } |
1466 | ||
037b0a47 LP |
1467 | call = (int (*)(bool b)) dlsym(dl, "_nss_systemd_block"); |
1468 | if (!call) | |
fa027117 | 1469 | /* If the file is installed but lacks the symbol we expect, things are weird, let's complain */ |
037b0a47 LP |
1470 | return log_debug_errno(SYNTHETIC_ERRNO(ELIBBAD), |
1471 | "Unable to find symbol _nss_systemd_block in libnss_systemd.so.2: %s", dlerror()); | |
ec8e4a0e | 1472 | |
037b0a47 | 1473 | return call(b); |
ec8e4a0e | 1474 | } |