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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 | ||
99534007 | 156 | UserDBIterator *iterator = ASSERT_PTR(userdata); |
ec8e4a0e LP |
157 | int r; |
158 | ||
ec8e4a0e LP |
159 | if (error_id) { |
160 | log_debug("Got lookup error: %s", error_id); | |
161 | ||
162 | if (STR_IN_SET(error_id, | |
163 | "io.systemd.UserDatabase.NoRecordFound", | |
164 | "io.systemd.UserDatabase.ConflictingRecordFound")) | |
165 | r = -ESRCH; | |
166 | else if (streq(error_id, "io.systemd.UserDatabase.ServiceNotAvailable")) | |
167 | r = -EHOSTDOWN; | |
56870d32 LP |
168 | else if (streq(error_id, "io.systemd.UserDatabase.EnumerationNotSupported")) |
169 | r = -EOPNOTSUPP; | |
ec8e4a0e LP |
170 | else if (streq(error_id, VARLINK_ERROR_TIMEOUT)) |
171 | r = -ETIMEDOUT; | |
172 | else | |
173 | r = -EIO; | |
174 | ||
175 | goto finish; | |
176 | } | |
177 | ||
178 | switch (iterator->what) { | |
179 | ||
180 | case LOOKUP_USER: { | |
181 | _cleanup_(user_group_data_release) struct user_group_data user_data = {}; | |
182 | ||
183 | static const JsonDispatch dispatch_table[] = { | |
184 | { "record", _JSON_VARIANT_TYPE_INVALID, json_dispatch_variant, offsetof(struct user_group_data, record), 0 }, | |
185 | { "incomplete", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(struct user_group_data, incomplete), 0 }, | |
186 | {} | |
187 | }; | |
188 | _cleanup_(user_record_unrefp) UserRecord *hr = NULL; | |
189 | ||
190 | assert_se(!iterator->found_user); | |
191 | ||
192 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &user_data); | |
193 | if (r < 0) | |
194 | goto finish; | |
195 | ||
196 | if (!user_data.record) { | |
197 | r = log_debug_errno(SYNTHETIC_ERRNO(EIO), "Reply is missing record key"); | |
198 | goto finish; | |
199 | } | |
200 | ||
201 | hr = user_record_new(); | |
202 | if (!hr) { | |
203 | r = -ENOMEM; | |
204 | goto finish; | |
205 | } | |
206 | ||
207 | r = user_record_load(hr, user_data.record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE); | |
208 | if (r < 0) | |
209 | goto finish; | |
210 | ||
211 | if (!hr->service) { | |
212 | r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "User record does not carry service information, refusing."); | |
213 | goto finish; | |
214 | } | |
215 | ||
216 | hr->incomplete = user_data.incomplete; | |
217 | ||
218 | /* We match the root user by the name since the name is our primary key. We match the nobody | |
219 | * use by UID though, since the name might differ on OSes */ | |
220 | if (streq_ptr(hr->user_name, "root")) | |
221 | iterator->synthesize_root = false; | |
222 | if (hr->uid == UID_NOBODY) | |
223 | iterator->synthesize_nobody = false; | |
224 | ||
225 | iterator->found_user = TAKE_PTR(hr); | |
226 | iterator->n_found++; | |
227 | ||
228 | /* More stuff coming? then let's just exit cleanly here */ | |
229 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
230 | return 0; | |
231 | ||
232 | /* Otherwise, let's remove this link and exit cleanly then */ | |
233 | r = 0; | |
234 | goto finish; | |
235 | } | |
236 | ||
237 | case LOOKUP_GROUP: { | |
238 | _cleanup_(user_group_data_release) struct user_group_data group_data = {}; | |
239 | ||
240 | static const JsonDispatch dispatch_table[] = { | |
241 | { "record", _JSON_VARIANT_TYPE_INVALID, json_dispatch_variant, offsetof(struct user_group_data, record), 0 }, | |
242 | { "incomplete", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(struct user_group_data, incomplete), 0 }, | |
243 | {} | |
244 | }; | |
245 | _cleanup_(group_record_unrefp) GroupRecord *g = NULL; | |
246 | ||
247 | assert_se(!iterator->found_group); | |
248 | ||
249 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &group_data); | |
250 | if (r < 0) | |
251 | goto finish; | |
252 | ||
253 | if (!group_data.record) { | |
254 | r = log_debug_errno(SYNTHETIC_ERRNO(EIO), "Reply is missing record key"); | |
255 | goto finish; | |
256 | } | |
257 | ||
258 | g = group_record_new(); | |
259 | if (!g) { | |
260 | r = -ENOMEM; | |
261 | goto finish; | |
262 | } | |
263 | ||
264 | r = group_record_load(g, group_data.record, USER_RECORD_LOAD_REFUSE_SECRET|USER_RECORD_PERMISSIVE); | |
265 | if (r < 0) | |
266 | goto finish; | |
267 | ||
268 | if (!g->service) { | |
269 | r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Group record does not carry service information, refusing."); | |
270 | goto finish; | |
271 | } | |
272 | ||
273 | g->incomplete = group_data.incomplete; | |
274 | ||
275 | if (streq_ptr(g->group_name, "root")) | |
276 | iterator->synthesize_root = false; | |
277 | if (g->gid == GID_NOBODY) | |
278 | iterator->synthesize_nobody = false; | |
279 | ||
280 | iterator->found_group = TAKE_PTR(g); | |
281 | iterator->n_found++; | |
282 | ||
283 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
284 | return 0; | |
285 | ||
286 | r = 0; | |
287 | goto finish; | |
288 | } | |
289 | ||
290 | case LOOKUP_MEMBERSHIP: { | |
291 | struct membership_data { | |
292 | const char *user_name; | |
293 | const char *group_name; | |
294 | } membership_data = {}; | |
295 | ||
296 | static const JsonDispatch dispatch_table[] = { | |
297 | { "userName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(struct membership_data, user_name), JSON_SAFE }, | |
298 | { "groupName", JSON_VARIANT_STRING, json_dispatch_const_string, offsetof(struct membership_data, group_name), JSON_SAFE }, | |
299 | {} | |
300 | }; | |
301 | ||
302 | assert(!iterator->found_user_name); | |
303 | assert(!iterator->found_group_name); | |
304 | ||
305 | r = json_dispatch(parameters, dispatch_table, NULL, 0, &membership_data); | |
306 | if (r < 0) | |
307 | goto finish; | |
308 | ||
309 | iterator->found_user_name = mfree(iterator->found_user_name); | |
310 | iterator->found_group_name = mfree(iterator->found_group_name); | |
311 | ||
312 | iterator->found_user_name = strdup(membership_data.user_name); | |
313 | if (!iterator->found_user_name) { | |
314 | r = -ENOMEM; | |
315 | goto finish; | |
316 | } | |
317 | ||
318 | iterator->found_group_name = strdup(membership_data.group_name); | |
319 | if (!iterator->found_group_name) { | |
320 | r = -ENOMEM; | |
321 | goto finish; | |
322 | } | |
323 | ||
324 | iterator->n_found++; | |
325 | ||
326 | if (FLAGS_SET(flags, VARLINK_REPLY_CONTINUES)) | |
327 | return 0; | |
328 | ||
329 | r = 0; | |
330 | goto finish; | |
331 | } | |
332 | ||
333 | default: | |
04499a70 | 334 | assert_not_reached(); |
ec8e4a0e LP |
335 | } |
336 | ||
337 | finish: | |
338 | /* If we got one ESRCH, let that win. This way when we do a wild dump we won't be tripped up by bad | |
339 | * errors if at least one connection ended cleanly */ | |
340 | if (r == -ESRCH || iterator->error == 0) | |
341 | iterator->error = -r; | |
342 | ||
343 | assert_se(set_remove(iterator->links, link) == link); | |
344 | link = varlink_unref(link); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int userdb_connect( | |
349 | UserDBIterator *iterator, | |
350 | const char *path, | |
351 | const char *method, | |
352 | bool more, | |
353 | JsonVariant *query) { | |
354 | ||
355 | _cleanup_(varlink_unrefp) Varlink *vl = NULL; | |
356 | int r; | |
357 | ||
358 | assert(iterator); | |
359 | assert(path); | |
360 | assert(method); | |
361 | ||
362 | r = varlink_connect_address(&vl, path); | |
363 | if (r < 0) | |
364 | return log_debug_errno(r, "Unable to connect to %s: %m", path); | |
365 | ||
366 | varlink_set_userdata(vl, iterator); | |
367 | ||
368 | if (!iterator->event) { | |
369 | r = sd_event_new(&iterator->event); | |
370 | if (r < 0) | |
371 | return log_debug_errno(r, "Unable to allocate event loop: %m"); | |
372 | } | |
373 | ||
374 | r = varlink_attach_event(vl, iterator->event, SD_EVENT_PRIORITY_NORMAL); | |
375 | if (r < 0) | |
376 | return log_debug_errno(r, "Failed to attach varlink connection to event loop: %m"); | |
377 | ||
378 | (void) varlink_set_description(vl, path); | |
379 | ||
380 | r = varlink_bind_reply(vl, userdb_on_query_reply); | |
381 | if (r < 0) | |
382 | return log_debug_errno(r, "Failed to bind reply callback: %m"); | |
383 | ||
384 | if (more) | |
385 | r = varlink_observe(vl, method, query); | |
386 | else | |
387 | r = varlink_invoke(vl, method, query); | |
388 | if (r < 0) | |
389 | return log_debug_errno(r, "Failed to invoke varlink method: %m"); | |
390 | ||
35e601d4 | 391 | r = set_ensure_consume(&iterator->links, &link_hash_ops, TAKE_PTR(vl)); |
ec8e4a0e LP |
392 | if (r < 0) |
393 | return log_debug_errno(r, "Failed to add varlink connection to set: %m"); | |
ec8e4a0e LP |
394 | return r; |
395 | } | |
396 | ||
397 | static int userdb_start_query( | |
398 | UserDBIterator *iterator, | |
399 | const char *method, | |
400 | bool more, | |
401 | JsonVariant *query, | |
402 | UserDBFlags flags) { | |
403 | ||
404 | _cleanup_(strv_freep) char **except = NULL, **only = NULL; | |
405 | _cleanup_(closedirp) DIR *d = NULL; | |
ec8e4a0e LP |
406 | const char *e; |
407 | int r, ret = 0; | |
408 | ||
409 | assert(iterator); | |
410 | assert(method); | |
411 | ||
b2148254 LP |
412 | if (FLAGS_SET(flags, USERDB_EXCLUDE_VARLINK)) |
413 | return -ENOLINK; | |
414 | ||
ec8e4a0e LP |
415 | e = getenv("SYSTEMD_BYPASS_USERDB"); |
416 | if (e) { | |
417 | r = parse_boolean(e); | |
418 | if (r > 0) | |
419 | return -ENOLINK; | |
420 | if (r < 0) { | |
421 | except = strv_split(e, ":"); | |
422 | if (!except) | |
423 | return -ENOMEM; | |
424 | } | |
425 | } | |
426 | ||
427 | e = getenv("SYSTEMD_ONLY_USERDB"); | |
428 | if (e) { | |
429 | only = strv_split(e, ":"); | |
430 | if (!only) | |
431 | return -ENOMEM; | |
432 | } | |
433 | ||
434 | /* First, let's talk to the multiplexer, if we can */ | |
85f088ab | 435 | if ((flags & (USERDB_AVOID_MULTIPLEXER|USERDB_EXCLUDE_DYNAMIC_USER|USERDB_EXCLUDE_NSS|USERDB_EXCLUDE_DROPIN|USERDB_DONT_SYNTHESIZE)) == 0 && |
ec8e4a0e LP |
436 | !strv_contains(except, "io.systemd.Multiplexer") && |
437 | (!only || strv_contains(only, "io.systemd.Multiplexer"))) { | |
438 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = json_variant_ref(query); | |
439 | ||
440 | r = json_variant_set_field_string(&patched_query, "service", "io.systemd.Multiplexer"); | |
441 | if (r < 0) | |
442 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
443 | ||
444 | r = userdb_connect(iterator, "/run/systemd/userdb/io.systemd.Multiplexer", method, more, patched_query); | |
445 | if (r >= 0) { | |
446 | iterator->nss_covered = true; /* The multiplexer does NSS */ | |
85f088ab | 447 | iterator->dropin_covered = true; /* It also handles drop-in stuff */ |
ec8e4a0e LP |
448 | return 0; |
449 | } | |
450 | } | |
451 | ||
452 | d = opendir("/run/systemd/userdb/"); | |
453 | if (!d) { | |
454 | if (errno == ENOENT) | |
455 | return -ESRCH; | |
456 | ||
457 | return -errno; | |
458 | } | |
459 | ||
460 | FOREACH_DIRENT(de, d, return -errno) { | |
461 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = NULL; | |
462 | _cleanup_free_ char *p = NULL; | |
85f088ab | 463 | bool is_nss, is_dropin; |
ec8e4a0e LP |
464 | |
465 | if (streq(de->d_name, "io.systemd.Multiplexer")) /* We already tried this above, don't try this again */ | |
466 | continue; | |
467 | ||
80d88a82 | 468 | if (FLAGS_SET(flags, USERDB_EXCLUDE_DYNAMIC_USER) && |
ec8e4a0e LP |
469 | streq(de->d_name, "io.systemd.DynamicUser")) |
470 | continue; | |
471 | ||
472 | /* Avoid NSS is this is requested. Note that we also skip NSS when we were asked to skip the | |
473 | * multiplexer, since in that case it's safer to do NSS in the client side emulation below | |
474 | * (and when we run as part of systemd-userdbd.service we don't want to talk to ourselves | |
475 | * anyway). */ | |
476 | is_nss = streq(de->d_name, "io.systemd.NameServiceSwitch"); | |
80d88a82 | 477 | if ((flags & (USERDB_EXCLUDE_NSS|USERDB_AVOID_MULTIPLEXER)) && is_nss) |
ec8e4a0e LP |
478 | continue; |
479 | ||
85f088ab LP |
480 | /* Similar for the drop-in service */ |
481 | is_dropin = streq(de->d_name, "io.systemd.DropIn"); | |
482 | if ((flags & (USERDB_EXCLUDE_DROPIN|USERDB_AVOID_MULTIPLEXER)) && is_dropin) | |
483 | continue; | |
484 | ||
ec8e4a0e LP |
485 | if (strv_contains(except, de->d_name)) |
486 | continue; | |
487 | ||
488 | if (only && !strv_contains(only, de->d_name)) | |
489 | continue; | |
490 | ||
491 | p = path_join("/run/systemd/userdb/", de->d_name); | |
492 | if (!p) | |
493 | return -ENOMEM; | |
494 | ||
495 | patched_query = json_variant_ref(query); | |
496 | r = json_variant_set_field_string(&patched_query, "service", de->d_name); | |
497 | if (r < 0) | |
498 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
499 | ||
500 | r = userdb_connect(iterator, p, method, more, patched_query); | |
85f088ab LP |
501 | if (is_nss && r >= 0) /* Turn off fallback NSS + dropin if we found the NSS/dropin service |
502 | * and could connect to it */ | |
ec8e4a0e | 503 | iterator->nss_covered = true; |
85f088ab LP |
504 | if (is_dropin && r >= 0) |
505 | iterator->dropin_covered = true; | |
ec8e4a0e LP |
506 | |
507 | if (ret == 0 && r < 0) | |
508 | ret = r; | |
509 | } | |
510 | ||
511 | if (set_isempty(iterator->links)) | |
58dbf4c9 | 512 | return ret < 0 ? ret : -ESRCH; /* propagate last error we saw if we couldn't connect to anything. */ |
ec8e4a0e LP |
513 | |
514 | /* We connected to some services, in this case, ignore the ones we failed on */ | |
515 | return 0; | |
516 | } | |
517 | ||
518 | static int userdb_process( | |
519 | UserDBIterator *iterator, | |
520 | UserRecord **ret_user_record, | |
521 | GroupRecord **ret_group_record, | |
522 | char **ret_user_name, | |
523 | char **ret_group_name) { | |
524 | ||
525 | int r; | |
526 | ||
527 | assert(iterator); | |
528 | ||
529 | for (;;) { | |
530 | if (iterator->what == LOOKUP_USER && iterator->found_user) { | |
531 | if (ret_user_record) | |
532 | *ret_user_record = TAKE_PTR(iterator->found_user); | |
533 | else | |
534 | iterator->found_user = user_record_unref(iterator->found_user); | |
535 | ||
536 | if (ret_group_record) | |
537 | *ret_group_record = NULL; | |
538 | if (ret_user_name) | |
539 | *ret_user_name = NULL; | |
540 | if (ret_group_name) | |
541 | *ret_group_name = NULL; | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | if (iterator->what == LOOKUP_GROUP && iterator->found_group) { | |
547 | if (ret_group_record) | |
548 | *ret_group_record = TAKE_PTR(iterator->found_group); | |
549 | else | |
550 | iterator->found_group = group_record_unref(iterator->found_group); | |
551 | ||
552 | if (ret_user_record) | |
553 | *ret_user_record = NULL; | |
554 | if (ret_user_name) | |
555 | *ret_user_name = NULL; | |
556 | if (ret_group_name) | |
557 | *ret_group_name = NULL; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | if (iterator->what == LOOKUP_MEMBERSHIP && iterator->found_user_name && iterator->found_group_name) { | |
563 | if (ret_user_name) | |
564 | *ret_user_name = TAKE_PTR(iterator->found_user_name); | |
565 | else | |
566 | iterator->found_user_name = mfree(iterator->found_user_name); | |
567 | ||
568 | if (ret_group_name) | |
569 | *ret_group_name = TAKE_PTR(iterator->found_group_name); | |
570 | else | |
571 | iterator->found_group_name = mfree(iterator->found_group_name); | |
572 | ||
573 | if (ret_user_record) | |
574 | *ret_user_record = NULL; | |
575 | if (ret_group_record) | |
576 | *ret_group_record = NULL; | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | if (set_isempty(iterator->links)) { | |
582 | if (iterator->error == 0) | |
583 | return -ESRCH; | |
584 | ||
585 | return -abs(iterator->error); | |
586 | } | |
587 | ||
588 | if (!iterator->event) | |
589 | return -ESRCH; | |
590 | ||
591 | r = sd_event_run(iterator->event, UINT64_MAX); | |
592 | if (r < 0) | |
593 | return r; | |
594 | } | |
595 | } | |
596 | ||
597 | static int synthetic_root_user_build(UserRecord **ret) { | |
598 | return user_record_build( | |
599 | ret, | |
0cdf6b14 | 600 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_CONST_STRING("root")), |
ec8e4a0e LP |
601 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(0)), |
602 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), | |
0cdf6b14 LP |
603 | JSON_BUILD_PAIR("homeDirectory", JSON_BUILD_CONST_STRING("/root")), |
604 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); | |
ec8e4a0e LP |
605 | } |
606 | ||
607 | static int synthetic_nobody_user_build(UserRecord **ret) { | |
608 | return user_record_build( | |
609 | ret, | |
0cdf6b14 | 610 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_CONST_STRING(NOBODY_USER_NAME)), |
ec8e4a0e LP |
611 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(UID_NOBODY)), |
612 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), | |
0cdf6b14 | 613 | JSON_BUILD_PAIR("shell", JSON_BUILD_CONST_STRING(NOLOGIN)), |
ec8e4a0e | 614 | JSON_BUILD_PAIR("locked", JSON_BUILD_BOOLEAN(true)), |
0cdf6b14 | 615 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
616 | } |
617 | ||
618 | int userdb_by_name(const char *name, UserDBFlags flags, UserRecord **ret) { | |
619 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
620 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
621 | int r; | |
622 | ||
7a8867ab | 623 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
624 | return -EINVAL; |
625 | ||
626 | r = json_build(&query, JSON_BUILD_OBJECT( | |
627 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
628 | if (r < 0) | |
629 | return r; | |
630 | ||
7c674191 | 631 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
632 | if (!iterator) |
633 | return -ENOMEM; | |
634 | ||
635 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
636 | if (r >= 0) { | |
637 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
638 | if (r >= 0) | |
639 | return r; | |
640 | } | |
641 | ||
85f088ab LP |
642 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
643 | r = dropin_user_record_by_name(name, NULL, flags, ret); | |
644 | if (r >= 0) | |
645 | return r; | |
646 | } | |
647 | ||
80d88a82 | 648 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 | 649 | /* Make sure the NSS lookup doesn't recurse back to us. */ |
ec8e4a0e | 650 | |
037b0a47 LP |
651 | r = userdb_iterator_block_nss_systemd(iterator); |
652 | if (r >= 0) { | |
ec8e4a0e | 653 | /* Client-side NSS fallback */ |
80d88a82 | 654 | r = nss_user_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
655 | if (r >= 0) |
656 | return r; | |
657 | } | |
658 | } | |
659 | ||
660 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
661 | if (streq(name, "root")) | |
662 | return synthetic_root_user_build(ret); | |
663 | ||
664 | if (streq(name, NOBODY_USER_NAME) && synthesize_nobody()) | |
665 | return synthetic_nobody_user_build(ret); | |
666 | } | |
667 | ||
668 | return r; | |
669 | } | |
670 | ||
671 | int userdb_by_uid(uid_t uid, UserDBFlags flags, UserRecord **ret) { | |
672 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
673 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
674 | int r; | |
675 | ||
676 | if (!uid_is_valid(uid)) | |
677 | return -EINVAL; | |
678 | ||
679 | r = json_build(&query, JSON_BUILD_OBJECT( | |
680 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(uid)))); | |
681 | if (r < 0) | |
682 | return r; | |
683 | ||
7c674191 | 684 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
685 | if (!iterator) |
686 | return -ENOMEM; | |
687 | ||
688 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
689 | if (r >= 0) { | |
690 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
691 | if (r >= 0) | |
692 | return r; | |
693 | } | |
694 | ||
85f088ab LP |
695 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
696 | r = dropin_user_record_by_uid(uid, NULL, flags, ret); | |
697 | if (r >= 0) | |
698 | return r; | |
699 | } | |
700 | ||
80d88a82 | 701 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 LP |
702 | r = userdb_iterator_block_nss_systemd(iterator); |
703 | if (r >= 0) { | |
ec8e4a0e | 704 | /* Client-side NSS fallback */ |
80d88a82 | 705 | r = nss_user_record_by_uid(uid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
706 | if (r >= 0) |
707 | return r; | |
708 | } | |
709 | } | |
710 | ||
711 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
712 | if (uid == 0) | |
713 | return synthetic_root_user_build(ret); | |
714 | ||
715 | if (uid == UID_NOBODY && synthesize_nobody()) | |
716 | return synthetic_nobody_user_build(ret); | |
717 | } | |
718 | ||
719 | return r; | |
720 | } | |
721 | ||
722 | int userdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
723 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 724 | int r, qr; |
ec8e4a0e LP |
725 | |
726 | assert(ret); | |
727 | ||
7c674191 | 728 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
729 | if (!iterator) |
730 | return -ENOMEM; | |
731 | ||
85f088ab | 732 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", true, NULL, flags); |
ec8e4a0e | 733 | |
85f088ab | 734 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
735 | r = userdb_iterator_block_nss_systemd(iterator); |
736 | if (r < 0) | |
737 | return r; | |
ec8e4a0e LP |
738 | |
739 | setpwent(); | |
740 | iterator->nss_iterating = true; | |
85f088ab LP |
741 | } |
742 | ||
743 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
744 | r = conf_files_list_nulstr( | |
745 | &iterator->dropins, | |
746 | ".user", | |
747 | NULL, | |
748 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
749 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
750 | if (r < 0) | |
751 | log_debug_errno(r, "Failed to find user drop-ins, ignoring: %m"); | |
752 | } | |
753 | ||
754 | /* propagate IPC error, but only if there are no drop-ins */ | |
755 | if (qr < 0 && | |
756 | !iterator->nss_iterating && | |
757 | strv_isempty(iterator->dropins)) | |
758 | return qr; | |
ec8e4a0e | 759 | |
ec8e4a0e LP |
760 | *ret = TAKE_PTR(iterator); |
761 | return 0; | |
762 | } | |
763 | ||
764 | int userdb_iterator_get(UserDBIterator *iterator, UserRecord **ret) { | |
765 | int r; | |
766 | ||
767 | assert(iterator); | |
768 | assert(iterator->what == LOOKUP_USER); | |
769 | ||
770 | if (iterator->nss_iterating) { | |
771 | struct passwd *pw; | |
772 | ||
773 | /* If NSS isn't covered elsewhere, let's iterate through it first, since it probably contains | |
774 | * the more traditional sources, which are probably good to show first. */ | |
775 | ||
776 | pw = getpwent(); | |
777 | if (pw) { | |
778 | _cleanup_free_ char *buffer = NULL; | |
779 | bool incomplete = false; | |
780 | struct spwd spwd; | |
781 | ||
782 | if (streq_ptr(pw->pw_name, "root")) | |
783 | iterator->synthesize_root = false; | |
784 | if (pw->pw_uid == UID_NOBODY) | |
785 | iterator->synthesize_nobody = false; | |
786 | ||
80d88a82 | 787 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
788 | r = nss_spwd_for_passwd(pw, &spwd, &buffer); |
789 | if (r < 0) { | |
790 | log_debug_errno(r, "Failed to acquire shadow entry for user %s, ignoring: %m", pw->pw_name); | |
791 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
792 | } | |
793 | } else { | |
794 | r = -EUCLEAN; | |
795 | incomplete = true; | |
ec8e4a0e LP |
796 | } |
797 | ||
798 | r = nss_passwd_to_user_record(pw, r >= 0 ? &spwd : NULL, ret); | |
799 | if (r < 0) | |
800 | return r; | |
801 | ||
802 | if (ret) | |
803 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
804 | |
805 | iterator->n_found++; | |
ec8e4a0e LP |
806 | return r; |
807 | } | |
808 | ||
809 | if (errno != 0) | |
810 | log_debug_errno(errno, "Failure to iterate NSS user database, ignoring: %m"); | |
811 | ||
812 | iterator->nss_iterating = false; | |
813 | endpwent(); | |
814 | } | |
815 | ||
85f088ab LP |
816 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
817 | const char *i = iterator->dropins[iterator->current_dropin]; | |
818 | _cleanup_free_ char *fn = NULL; | |
819 | uid_t uid; | |
820 | char *e; | |
ec8e4a0e | 821 | |
85f088ab LP |
822 | /* Next, let's add in the static drop-ins, which are quick to retrieve */ |
823 | ||
824 | r = path_extract_filename(i, &fn); | |
825 | if (r < 0) | |
826 | return r; | |
827 | ||
828 | e = endswith(fn, ".user"); /* not actually a .user file? Then skip to next */ | |
829 | if (!e) | |
830 | continue; | |
831 | ||
832 | *e = 0; /* Chop off suffix */ | |
833 | ||
834 | if (parse_uid(fn, &uid) < 0) /* not a UID .user file? Then skip to next */ | |
835 | continue; | |
836 | ||
837 | r = dropin_user_record_by_uid(uid, i, iterator->flags, ret); | |
838 | if (r < 0) { | |
839 | log_debug_errno(r, "Failed to parse user record for UID " UID_FMT ", ignoring: %m", uid); | |
840 | continue; /* If we failed to parse this record, let's suppress it from enumeration, | |
841 | * and continue with the next record. Maybe someone is dropping it files | |
842 | * and only partially wrote this one. */ | |
843 | } | |
844 | ||
845 | iterator->current_dropin++; /* make sure on the next call of userdb_iterator_get() we continue with the next dropin */ | |
846 | iterator->n_found++; | |
847 | return 0; | |
848 | } | |
849 | ||
850 | /* Then, let's return the users provided by varlink IPC */ | |
851 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
ec8e4a0e | 852 | if (r < 0) { |
85f088ab LP |
853 | |
854 | /* Finally, synthesize root + nobody if not done yet */ | |
ec8e4a0e LP |
855 | if (iterator->synthesize_root) { |
856 | iterator->synthesize_root = false; | |
857 | iterator->n_found++; | |
858 | return synthetic_root_user_build(ret); | |
859 | } | |
860 | ||
861 | if (iterator->synthesize_nobody) { | |
862 | iterator->synthesize_nobody = false; | |
863 | iterator->n_found++; | |
864 | return synthetic_nobody_user_build(ret); | |
865 | } | |
ec8e4a0e | 866 | |
77fe7d15 LP |
867 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
868 | if (iterator->n_found > 0) | |
869 | return -ESRCH; | |
870 | } | |
ec8e4a0e LP |
871 | |
872 | return r; | |
873 | } | |
874 | ||
875 | static int synthetic_root_group_build(GroupRecord **ret) { | |
876 | return group_record_build( | |
877 | ret, | |
0cdf6b14 | 878 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_CONST_STRING("root")), |
ec8e4a0e | 879 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), |
0cdf6b14 | 880 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
881 | } |
882 | ||
883 | static int synthetic_nobody_group_build(GroupRecord **ret) { | |
884 | return group_record_build( | |
885 | ret, | |
0cdf6b14 | 886 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_CONST_STRING(NOBODY_GROUP_NAME)), |
ec8e4a0e | 887 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), |
0cdf6b14 | 888 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
889 | } |
890 | ||
891 | int groupdb_by_name(const char *name, UserDBFlags flags, GroupRecord **ret) { | |
892 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
893 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
894 | int r; | |
895 | ||
7a8867ab | 896 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
897 | return -EINVAL; |
898 | ||
899 | r = json_build(&query, JSON_BUILD_OBJECT( | |
900 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
901 | if (r < 0) | |
902 | return r; | |
903 | ||
7c674191 | 904 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
905 | if (!iterator) |
906 | return -ENOMEM; | |
907 | ||
908 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
909 | if (r >= 0) { | |
910 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
911 | if (r >= 0) | |
912 | return r; | |
913 | } | |
914 | ||
85f088ab LP |
915 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
916 | r = dropin_group_record_by_name(name, NULL, flags, ret); | |
917 | if (r >= 0) | |
918 | return r; | |
919 | } | |
920 | ||
921 | ||
80d88a82 | 922 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
923 | r = userdb_iterator_block_nss_systemd(iterator); |
924 | if (r >= 0) { | |
80d88a82 | 925 | r = nss_group_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
926 | if (r >= 0) |
927 | return r; | |
928 | } | |
929 | } | |
930 | ||
931 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
932 | if (streq(name, "root")) | |
933 | return synthetic_root_group_build(ret); | |
934 | ||
935 | if (streq(name, NOBODY_GROUP_NAME) && synthesize_nobody()) | |
936 | return synthetic_nobody_group_build(ret); | |
937 | } | |
938 | ||
939 | return r; | |
940 | } | |
941 | ||
942 | int groupdb_by_gid(gid_t gid, UserDBFlags flags, GroupRecord **ret) { | |
943 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
944 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
945 | int r; | |
946 | ||
947 | if (!gid_is_valid(gid)) | |
948 | return -EINVAL; | |
949 | ||
950 | r = json_build(&query, JSON_BUILD_OBJECT( | |
951 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(gid)))); | |
952 | if (r < 0) | |
953 | return r; | |
954 | ||
7c674191 | 955 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
956 | if (!iterator) |
957 | return -ENOMEM; | |
958 | ||
959 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
960 | if (r >= 0) { | |
961 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
962 | if (r >= 0) | |
963 | return r; | |
964 | } | |
965 | ||
85f088ab LP |
966 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
967 | r = dropin_group_record_by_gid(gid, NULL, flags, ret); | |
968 | if (r >= 0) | |
969 | return r; | |
970 | } | |
971 | ||
80d88a82 | 972 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
973 | r = userdb_iterator_block_nss_systemd(iterator); |
974 | if (r >= 0) { | |
80d88a82 | 975 | r = nss_group_record_by_gid(gid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
976 | if (r >= 0) |
977 | return r; | |
978 | } | |
979 | } | |
980 | ||
981 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
982 | if (gid == 0) | |
983 | return synthetic_root_group_build(ret); | |
984 | ||
985 | if (gid == GID_NOBODY && synthesize_nobody()) | |
986 | return synthetic_nobody_group_build(ret); | |
987 | } | |
988 | ||
989 | return r; | |
990 | } | |
991 | ||
992 | int groupdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
993 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 994 | int r, qr; |
ec8e4a0e LP |
995 | |
996 | assert(ret); | |
997 | ||
7c674191 | 998 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
999 | if (!iterator) |
1000 | return -ENOMEM; | |
1001 | ||
85f088ab | 1002 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", true, NULL, flags); |
ec8e4a0e | 1003 | |
85f088ab | 1004 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
1005 | r = userdb_iterator_block_nss_systemd(iterator); |
1006 | if (r < 0) | |
1007 | return r; | |
ec8e4a0e LP |
1008 | |
1009 | setgrent(); | |
1010 | iterator->nss_iterating = true; | |
85f088ab LP |
1011 | } |
1012 | ||
1013 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
1014 | r = conf_files_list_nulstr( | |
1015 | &iterator->dropins, | |
1016 | ".group", | |
1017 | NULL, | |
1018 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
1019 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1020 | if (r < 0) | |
1021 | log_debug_errno(r, "Failed to find group drop-ins, ignoring: %m"); | |
1022 | } | |
1023 | ||
1024 | if (qr < 0 && | |
1025 | !iterator->nss_iterating && | |
1026 | strv_isempty(iterator->dropins)) | |
1027 | return qr; | |
ec8e4a0e | 1028 | |
ec8e4a0e LP |
1029 | *ret = TAKE_PTR(iterator); |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | int groupdb_iterator_get(UserDBIterator *iterator, GroupRecord **ret) { | |
1034 | int r; | |
1035 | ||
1036 | assert(iterator); | |
1037 | assert(iterator->what == LOOKUP_GROUP); | |
1038 | ||
1039 | if (iterator->nss_iterating) { | |
1040 | struct group *gr; | |
1041 | ||
1042 | errno = 0; | |
1043 | gr = getgrent(); | |
1044 | if (gr) { | |
1045 | _cleanup_free_ char *buffer = NULL; | |
1046 | bool incomplete = false; | |
1047 | struct sgrp sgrp; | |
1048 | ||
1049 | if (streq_ptr(gr->gr_name, "root")) | |
1050 | iterator->synthesize_root = false; | |
1051 | if (gr->gr_gid == GID_NOBODY) | |
1052 | iterator->synthesize_nobody = false; | |
1053 | ||
80d88a82 | 1054 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
1055 | r = nss_sgrp_for_group(gr, &sgrp, &buffer); |
1056 | if (r < 0) { | |
1057 | log_debug_errno(r, "Failed to acquire shadow entry for group %s, ignoring: %m", gr->gr_name); | |
1058 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
1059 | } | |
1060 | } else { | |
1061 | r = -EUCLEAN; | |
1062 | incomplete = true; | |
ec8e4a0e LP |
1063 | } |
1064 | ||
1065 | r = nss_group_to_group_record(gr, r >= 0 ? &sgrp : NULL, ret); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | ||
1069 | if (ret) | |
1070 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
1071 | |
1072 | iterator->n_found++; | |
ec8e4a0e LP |
1073 | return r; |
1074 | } | |
1075 | ||
1076 | if (errno != 0) | |
1077 | log_debug_errno(errno, "Failure to iterate NSS group database, ignoring: %m"); | |
1078 | ||
1079 | iterator->nss_iterating = false; | |
1080 | endgrent(); | |
1081 | } | |
1082 | ||
85f088ab LP |
1083 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1084 | const char *i = iterator->dropins[iterator->current_dropin]; | |
1085 | _cleanup_free_ char *fn = NULL; | |
1086 | gid_t gid; | |
1087 | char *e; | |
1088 | ||
1089 | r = path_extract_filename(i, &fn); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | e = endswith(fn, ".group"); | |
1094 | if (!e) | |
1095 | continue; | |
1096 | ||
1097 | *e = 0; /* Chop off suffix */ | |
1098 | ||
1099 | if (parse_gid(fn, &gid) < 0) | |
1100 | continue; | |
1101 | ||
1102 | r = dropin_group_record_by_gid(gid, i, iterator->flags, ret); | |
1103 | if (r < 0) { | |
1104 | log_debug_errno(r, "Failed to parse group record for GID " GID_FMT ", ignoring: %m", gid); | |
1105 | continue; | |
1106 | } | |
1107 | ||
1108 | iterator->current_dropin++; | |
1109 | iterator->n_found++; | |
1110 | return 0; | |
1111 | } | |
1112 | ||
ec8e4a0e LP |
1113 | r = userdb_process(iterator, NULL, ret, NULL, NULL); |
1114 | if (r < 0) { | |
1115 | if (iterator->synthesize_root) { | |
1116 | iterator->synthesize_root = false; | |
1117 | iterator->n_found++; | |
1118 | return synthetic_root_group_build(ret); | |
1119 | } | |
1120 | ||
1121 | if (iterator->synthesize_nobody) { | |
1122 | iterator->synthesize_nobody = false; | |
1123 | iterator->n_found++; | |
1124 | return synthetic_nobody_group_build(ret); | |
1125 | } | |
ec8e4a0e | 1126 | |
77fe7d15 LP |
1127 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
1128 | if (iterator->n_found > 0) | |
1129 | return -ESRCH; | |
1130 | } | |
ec8e4a0e LP |
1131 | |
1132 | return r; | |
1133 | } | |
1134 | ||
85f088ab LP |
1135 | static void discover_membership_dropins(UserDBIterator *i, UserDBFlags flags) { |
1136 | int r; | |
1137 | ||
1138 | r = conf_files_list_nulstr( | |
1139 | &i->dropins, | |
1140 | ".membership", | |
1141 | NULL, | |
1142 | CONF_FILES_REGULAR|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, | |
1143 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1144 | if (r < 0) | |
1145 | log_debug_errno(r, "Failed to find membership drop-ins, ignoring: %m"); | |
1146 | } | |
1147 | ||
ec8e4a0e LP |
1148 | int membershipdb_by_user(const char *name, UserDBFlags flags, UserDBIterator **ret) { |
1149 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1150 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1151 | int r, qr; |
ec8e4a0e LP |
1152 | |
1153 | assert(ret); | |
1154 | ||
7a8867ab | 1155 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1156 | return -EINVAL; |
1157 | ||
1158 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1159 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
1160 | if (r < 0) | |
1161 | return r; | |
1162 | ||
7c674191 | 1163 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1164 | if (!iterator) |
1165 | return -ENOMEM; | |
1166 | ||
ec8e4a0e LP |
1167 | iterator->filter_user_name = strdup(name); |
1168 | if (!iterator->filter_user_name) | |
1169 | return -ENOMEM; | |
1170 | ||
85f088ab LP |
1171 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
1172 | ||
1173 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { | |
1174 | r = userdb_iterator_block_nss_systemd(iterator); | |
1175 | if (r < 0) | |
1176 | return r; | |
ec8e4a0e | 1177 | |
85f088ab LP |
1178 | setgrent(); |
1179 | iterator->nss_iterating = true; | |
1180 | } | |
ec8e4a0e | 1181 | |
85f088ab LP |
1182 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1183 | discover_membership_dropins(iterator, flags); | |
1184 | ||
1185 | if (qr < 0 && | |
1186 | !iterator->nss_iterating && | |
1187 | strv_isempty(iterator->dropins)) | |
1188 | return qr; | |
1189 | ||
1190 | *ret = TAKE_PTR(iterator); | |
1191 | return 0; | |
ec8e4a0e LP |
1192 | } |
1193 | ||
1194 | int membershipdb_by_group(const char *name, UserDBFlags flags, UserDBIterator **ret) { | |
1195 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1196 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1197 | int r, qr; |
ec8e4a0e LP |
1198 | |
1199 | assert(ret); | |
1200 | ||
7a8867ab | 1201 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1202 | return -EINVAL; |
1203 | ||
1204 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1205 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
1206 | if (r < 0) | |
1207 | return r; | |
1208 | ||
7c674191 | 1209 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1210 | if (!iterator) |
1211 | return -ENOMEM; | |
1212 | ||
85f088ab LP |
1213 | iterator->filter_group_name = strdup(name); |
1214 | if (!iterator->filter_group_name) | |
1215 | return -ENOMEM; | |
ec8e4a0e | 1216 | |
85f088ab | 1217 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
ec8e4a0e | 1218 | |
85f088ab LP |
1219 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1220 | _cleanup_(group_record_unrefp) GroupRecord *gr = NULL; | |
ec8e4a0e | 1221 | |
85f088ab LP |
1222 | r = userdb_iterator_block_nss_systemd(iterator); |
1223 | if (r < 0) | |
1224 | return r; | |
ec8e4a0e | 1225 | |
85f088ab LP |
1226 | /* We ignore all errors here, since the group might be defined by a userdb native service, and we queried them already above. */ |
1227 | (void) nss_group_record_by_name(name, false, &gr); | |
1228 | if (gr) { | |
1229 | iterator->members_of_group = strv_copy(gr->members); | |
1230 | if (!iterator->members_of_group) | |
1231 | return -ENOMEM; | |
1232 | ||
1233 | iterator->index_members_of_group = 0; | |
1234 | ||
1235 | iterator->found_group_name = strdup(name); | |
1236 | if (!iterator->found_group_name) | |
1237 | return -ENOMEM; | |
1238 | } | |
ec8e4a0e LP |
1239 | } |
1240 | ||
85f088ab LP |
1241 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1242 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1243 | |
85f088ab LP |
1244 | if (qr < 0 && |
1245 | strv_isempty(iterator->members_of_group) && | |
1246 | strv_isempty(iterator->dropins)) | |
1247 | return qr; | |
ec8e4a0e | 1248 | |
85f088ab LP |
1249 | *ret = TAKE_PTR(iterator); |
1250 | return 0; | |
ec8e4a0e LP |
1251 | } |
1252 | ||
1253 | int membershipdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
1254 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 1255 | int r, qr; |
ec8e4a0e LP |
1256 | |
1257 | assert(ret); | |
1258 | ||
7c674191 | 1259 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1260 | if (!iterator) |
1261 | return -ENOMEM; | |
1262 | ||
85f088ab | 1263 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, NULL, flags); |
ec8e4a0e | 1264 | |
85f088ab LP |
1265 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1266 | r = userdb_iterator_block_nss_systemd(iterator); | |
1267 | if (r < 0) | |
1268 | return r; | |
ec8e4a0e | 1269 | |
85f088ab LP |
1270 | setgrent(); |
1271 | iterator->nss_iterating = true; | |
1272 | } | |
ec8e4a0e | 1273 | |
85f088ab LP |
1274 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1275 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1276 | |
85f088ab LP |
1277 | if (qr < 0 && |
1278 | !iterator->nss_iterating && | |
1279 | strv_isempty(iterator->dropins)) | |
1280 | return qr; | |
ec8e4a0e | 1281 | |
85f088ab LP |
1282 | *ret = TAKE_PTR(iterator); |
1283 | return 0; | |
ec8e4a0e LP |
1284 | } |
1285 | ||
1286 | int membershipdb_iterator_get( | |
1287 | UserDBIterator *iterator, | |
1288 | char **ret_user, | |
1289 | char **ret_group) { | |
1290 | ||
1291 | int r; | |
1292 | ||
1293 | assert(iterator); | |
1294 | ||
1295 | for (;;) { | |
d9f5f2a1 | 1296 | /* If we are iterating through NSS acquire a new group entry if we haven't acquired one yet. */ |
ec8e4a0e LP |
1297 | if (!iterator->members_of_group) { |
1298 | struct group *g; | |
1299 | ||
1300 | if (!iterator->nss_iterating) | |
1301 | break; | |
1302 | ||
1303 | assert(!iterator->found_user_name); | |
1304 | do { | |
1305 | errno = 0; | |
1306 | g = getgrent(); | |
1307 | if (!g) { | |
1308 | if (errno != 0) | |
1309 | log_debug_errno(errno, "Failure during NSS group iteration, ignoring: %m"); | |
1310 | break; | |
1311 | } | |
1312 | ||
1313 | } while (iterator->filter_user_name ? !strv_contains(g->gr_mem, iterator->filter_user_name) : | |
1314 | strv_isempty(g->gr_mem)); | |
1315 | ||
1316 | if (g) { | |
1317 | r = free_and_strdup(&iterator->found_group_name, g->gr_name); | |
1318 | if (r < 0) | |
1319 | return r; | |
1320 | ||
1321 | if (iterator->filter_user_name) | |
1322 | iterator->members_of_group = strv_new(iterator->filter_user_name); | |
1323 | else | |
1324 | iterator->members_of_group = strv_copy(g->gr_mem); | |
1325 | if (!iterator->members_of_group) | |
1326 | return -ENOMEM; | |
1327 | ||
1328 | iterator->index_members_of_group = 0; | |
1329 | } else { | |
1330 | iterator->nss_iterating = false; | |
1331 | endgrent(); | |
1332 | break; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | assert(iterator->found_group_name); | |
1337 | assert(iterator->members_of_group); | |
1338 | assert(!iterator->found_user_name); | |
1339 | ||
1340 | if (iterator->members_of_group[iterator->index_members_of_group]) { | |
1341 | _cleanup_free_ char *cu = NULL, *cg = NULL; | |
1342 | ||
1343 | if (ret_user) { | |
1344 | cu = strdup(iterator->members_of_group[iterator->index_members_of_group]); | |
1345 | if (!cu) | |
1346 | return -ENOMEM; | |
1347 | } | |
1348 | ||
1349 | if (ret_group) { | |
1350 | cg = strdup(iterator->found_group_name); | |
1351 | if (!cg) | |
1352 | return -ENOMEM; | |
1353 | } | |
1354 | ||
1355 | if (ret_user) | |
1356 | *ret_user = TAKE_PTR(cu); | |
1357 | ||
1358 | if (ret_group) | |
1359 | *ret_group = TAKE_PTR(cg); | |
1360 | ||
1361 | iterator->index_members_of_group++; | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | iterator->members_of_group = strv_free(iterator->members_of_group); | |
1366 | iterator->found_group_name = mfree(iterator->found_group_name); | |
1367 | } | |
1368 | ||
85f088ab LP |
1369 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1370 | const char *i = iterator->dropins[iterator->current_dropin], *e, *c; | |
1371 | _cleanup_free_ char *un = NULL, *gn = NULL; | |
1372 | ||
1373 | e = endswith(i, ".membership"); | |
1374 | if (!e) | |
1375 | continue; | |
1376 | ||
1377 | c = memchr(i, ':', e - i); | |
1378 | if (!c) | |
1379 | continue; | |
1380 | ||
1381 | un = strndup(i, c - i); | |
1382 | if (!un) | |
1383 | return -ENOMEM; | |
1384 | if (iterator->filter_user_name) { | |
1385 | if (!streq(un, iterator->filter_user_name)) | |
1386 | continue; | |
1387 | } else if (!valid_user_group_name(un, VALID_USER_RELAX)) | |
1388 | continue; | |
1389 | ||
1390 | c++; /* skip over ':' */ | |
1391 | gn = strndup(c, e - c); | |
1392 | if (!gn) | |
1393 | return -ENOMEM; | |
1394 | if (iterator->filter_group_name) { | |
1395 | if (!streq(gn, iterator->filter_group_name)) | |
1396 | continue; | |
1397 | } else if (!valid_user_group_name(gn, VALID_USER_RELAX)) | |
1398 | continue; | |
1399 | ||
1400 | iterator->current_dropin++; | |
1401 | iterator->n_found++; | |
1402 | ||
1403 | if (ret_user) | |
1404 | *ret_user = TAKE_PTR(un); | |
1405 | if (ret_group) | |
1406 | *ret_group = TAKE_PTR(gn); | |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
ec8e4a0e LP |
1411 | r = userdb_process(iterator, NULL, NULL, ret_user, ret_group); |
1412 | if (r < 0 && iterator->n_found > 0) | |
1413 | return -ESRCH; | |
1414 | ||
1415 | return r; | |
1416 | } | |
1417 | ||
1418 | int membershipdb_by_group_strv(const char *name, UserDBFlags flags, char ***ret) { | |
1419 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1420 | _cleanup_strv_free_ char **members = NULL; | |
1421 | int r; | |
1422 | ||
1423 | assert(name); | |
1424 | assert(ret); | |
1425 | ||
1426 | r = membershipdb_by_group(name, flags, &iterator); | |
1427 | if (r < 0) | |
1428 | return r; | |
1429 | ||
1430 | for (;;) { | |
1431 | _cleanup_free_ char *user_name = NULL; | |
1432 | ||
1433 | r = membershipdb_iterator_get(iterator, &user_name, NULL); | |
1434 | if (r == -ESRCH) | |
1435 | break; | |
1436 | if (r < 0) | |
1437 | return r; | |
1438 | ||
1439 | r = strv_consume(&members, TAKE_PTR(user_name)); | |
1440 | if (r < 0) | |
1441 | return r; | |
1442 | } | |
1443 | ||
1444 | strv_sort(members); | |
1445 | strv_uniq(members); | |
1446 | ||
1447 | *ret = TAKE_PTR(members); | |
1448 | return 0; | |
1449 | } | |
1450 | ||
037b0a47 LP |
1451 | int userdb_block_nss_systemd(int b) { |
1452 | _cleanup_(dlclosep) void *dl = NULL; | |
1453 | int (*call)(bool b); | |
ec8e4a0e | 1454 | |
037b0a47 | 1455 | /* Note that we might be called from libnss_systemd.so.2 itself, but that should be fine, really. */ |
ec8e4a0e | 1456 | |
a127c620 | 1457 | dl = dlopen(ROOTLIBDIR "/libnss_systemd.so.2", RTLD_LAZY|RTLD_NODELETE); |
037b0a47 LP |
1458 | if (!dl) { |
1459 | /* If the file isn't installed, don't complain loudly */ | |
1460 | log_debug("Failed to dlopen(libnss_systemd.so.2), ignoring: %s", dlerror()); | |
1461 | return 0; | |
ec8e4a0e LP |
1462 | } |
1463 | ||
037b0a47 LP |
1464 | call = (int (*)(bool b)) dlsym(dl, "_nss_systemd_block"); |
1465 | if (!call) | |
fa027117 | 1466 | /* If the file is installed but lacks the symbol we expect, things are weird, let's complain */ |
037b0a47 LP |
1467 | return log_debug_errno(SYNTHETIC_ERRNO(ELIBBAD), |
1468 | "Unable to find symbol _nss_systemd_block in libnss_systemd.so.2: %s", dlerror()); | |
ec8e4a0e | 1469 | |
037b0a47 | 1470 | return call(b); |
ec8e4a0e | 1471 | } |