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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; | |
ec8e4a0e LP |
408 | const char *e; |
409 | int r, ret = 0; | |
410 | ||
411 | assert(iterator); | |
412 | assert(method); | |
413 | ||
b2148254 LP |
414 | if (FLAGS_SET(flags, USERDB_EXCLUDE_VARLINK)) |
415 | return -ENOLINK; | |
416 | ||
ec8e4a0e LP |
417 | e = getenv("SYSTEMD_BYPASS_USERDB"); |
418 | if (e) { | |
419 | r = parse_boolean(e); | |
420 | if (r > 0) | |
421 | return -ENOLINK; | |
422 | if (r < 0) { | |
423 | except = strv_split(e, ":"); | |
424 | if (!except) | |
425 | return -ENOMEM; | |
426 | } | |
427 | } | |
428 | ||
429 | e = getenv("SYSTEMD_ONLY_USERDB"); | |
430 | if (e) { | |
431 | only = strv_split(e, ":"); | |
432 | if (!only) | |
433 | return -ENOMEM; | |
434 | } | |
435 | ||
436 | /* First, let's talk to the multiplexer, if we can */ | |
85f088ab | 437 | if ((flags & (USERDB_AVOID_MULTIPLEXER|USERDB_EXCLUDE_DYNAMIC_USER|USERDB_EXCLUDE_NSS|USERDB_EXCLUDE_DROPIN|USERDB_DONT_SYNTHESIZE)) == 0 && |
ec8e4a0e LP |
438 | !strv_contains(except, "io.systemd.Multiplexer") && |
439 | (!only || strv_contains(only, "io.systemd.Multiplexer"))) { | |
440 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = json_variant_ref(query); | |
441 | ||
442 | r = json_variant_set_field_string(&patched_query, "service", "io.systemd.Multiplexer"); | |
443 | if (r < 0) | |
444 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
445 | ||
446 | r = userdb_connect(iterator, "/run/systemd/userdb/io.systemd.Multiplexer", method, more, patched_query); | |
447 | if (r >= 0) { | |
448 | iterator->nss_covered = true; /* The multiplexer does NSS */ | |
85f088ab | 449 | iterator->dropin_covered = true; /* It also handles drop-in stuff */ |
ec8e4a0e LP |
450 | return 0; |
451 | } | |
452 | } | |
453 | ||
454 | d = opendir("/run/systemd/userdb/"); | |
455 | if (!d) { | |
456 | if (errno == ENOENT) | |
457 | return -ESRCH; | |
458 | ||
459 | return -errno; | |
460 | } | |
461 | ||
462 | FOREACH_DIRENT(de, d, return -errno) { | |
463 | _cleanup_(json_variant_unrefp) JsonVariant *patched_query = NULL; | |
464 | _cleanup_free_ char *p = NULL; | |
85f088ab | 465 | bool is_nss, is_dropin; |
ec8e4a0e LP |
466 | |
467 | if (streq(de->d_name, "io.systemd.Multiplexer")) /* We already tried this above, don't try this again */ | |
468 | continue; | |
469 | ||
80d88a82 | 470 | if (FLAGS_SET(flags, USERDB_EXCLUDE_DYNAMIC_USER) && |
ec8e4a0e LP |
471 | streq(de->d_name, "io.systemd.DynamicUser")) |
472 | continue; | |
473 | ||
474 | /* Avoid NSS is this is requested. Note that we also skip NSS when we were asked to skip the | |
475 | * multiplexer, since in that case it's safer to do NSS in the client side emulation below | |
476 | * (and when we run as part of systemd-userdbd.service we don't want to talk to ourselves | |
477 | * anyway). */ | |
478 | is_nss = streq(de->d_name, "io.systemd.NameServiceSwitch"); | |
80d88a82 | 479 | if ((flags & (USERDB_EXCLUDE_NSS|USERDB_AVOID_MULTIPLEXER)) && is_nss) |
ec8e4a0e LP |
480 | continue; |
481 | ||
85f088ab LP |
482 | /* Similar for the drop-in service */ |
483 | is_dropin = streq(de->d_name, "io.systemd.DropIn"); | |
484 | if ((flags & (USERDB_EXCLUDE_DROPIN|USERDB_AVOID_MULTIPLEXER)) && is_dropin) | |
485 | continue; | |
486 | ||
ec8e4a0e LP |
487 | if (strv_contains(except, de->d_name)) |
488 | continue; | |
489 | ||
490 | if (only && !strv_contains(only, de->d_name)) | |
491 | continue; | |
492 | ||
493 | p = path_join("/run/systemd/userdb/", de->d_name); | |
494 | if (!p) | |
495 | return -ENOMEM; | |
496 | ||
497 | patched_query = json_variant_ref(query); | |
498 | r = json_variant_set_field_string(&patched_query, "service", de->d_name); | |
499 | if (r < 0) | |
500 | return log_debug_errno(r, "Unable to set service JSON field: %m"); | |
501 | ||
502 | r = userdb_connect(iterator, p, method, more, patched_query); | |
85f088ab LP |
503 | if (is_nss && r >= 0) /* Turn off fallback NSS + dropin if we found the NSS/dropin service |
504 | * and could connect to it */ | |
ec8e4a0e | 505 | iterator->nss_covered = true; |
85f088ab LP |
506 | if (is_dropin && r >= 0) |
507 | iterator->dropin_covered = true; | |
ec8e4a0e LP |
508 | |
509 | if (ret == 0 && r < 0) | |
510 | ret = r; | |
511 | } | |
512 | ||
513 | if (set_isempty(iterator->links)) | |
58dbf4c9 | 514 | return ret < 0 ? ret : -ESRCH; /* propagate last error we saw if we couldn't connect to anything. */ |
ec8e4a0e LP |
515 | |
516 | /* We connected to some services, in this case, ignore the ones we failed on */ | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static int userdb_process( | |
521 | UserDBIterator *iterator, | |
522 | UserRecord **ret_user_record, | |
523 | GroupRecord **ret_group_record, | |
524 | char **ret_user_name, | |
525 | char **ret_group_name) { | |
526 | ||
527 | int r; | |
528 | ||
529 | assert(iterator); | |
530 | ||
531 | for (;;) { | |
532 | if (iterator->what == LOOKUP_USER && iterator->found_user) { | |
533 | if (ret_user_record) | |
534 | *ret_user_record = TAKE_PTR(iterator->found_user); | |
535 | else | |
536 | iterator->found_user = user_record_unref(iterator->found_user); | |
537 | ||
538 | if (ret_group_record) | |
539 | *ret_group_record = NULL; | |
540 | if (ret_user_name) | |
541 | *ret_user_name = NULL; | |
542 | if (ret_group_name) | |
543 | *ret_group_name = NULL; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | if (iterator->what == LOOKUP_GROUP && iterator->found_group) { | |
549 | if (ret_group_record) | |
550 | *ret_group_record = TAKE_PTR(iterator->found_group); | |
551 | else | |
552 | iterator->found_group = group_record_unref(iterator->found_group); | |
553 | ||
554 | if (ret_user_record) | |
555 | *ret_user_record = NULL; | |
556 | if (ret_user_name) | |
557 | *ret_user_name = NULL; | |
558 | if (ret_group_name) | |
559 | *ret_group_name = NULL; | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | if (iterator->what == LOOKUP_MEMBERSHIP && iterator->found_user_name && iterator->found_group_name) { | |
565 | if (ret_user_name) | |
566 | *ret_user_name = TAKE_PTR(iterator->found_user_name); | |
567 | else | |
568 | iterator->found_user_name = mfree(iterator->found_user_name); | |
569 | ||
570 | if (ret_group_name) | |
571 | *ret_group_name = TAKE_PTR(iterator->found_group_name); | |
572 | else | |
573 | iterator->found_group_name = mfree(iterator->found_group_name); | |
574 | ||
575 | if (ret_user_record) | |
576 | *ret_user_record = NULL; | |
577 | if (ret_group_record) | |
578 | *ret_group_record = NULL; | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | if (set_isempty(iterator->links)) { | |
584 | if (iterator->error == 0) | |
585 | return -ESRCH; | |
586 | ||
587 | return -abs(iterator->error); | |
588 | } | |
589 | ||
590 | if (!iterator->event) | |
591 | return -ESRCH; | |
592 | ||
593 | r = sd_event_run(iterator->event, UINT64_MAX); | |
594 | if (r < 0) | |
595 | return r; | |
596 | } | |
597 | } | |
598 | ||
599 | static int synthetic_root_user_build(UserRecord **ret) { | |
600 | return user_record_build( | |
601 | ret, | |
0cdf6b14 | 602 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_CONST_STRING("root")), |
ec8e4a0e LP |
603 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(0)), |
604 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), | |
0cdf6b14 LP |
605 | JSON_BUILD_PAIR("homeDirectory", JSON_BUILD_CONST_STRING("/root")), |
606 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); | |
ec8e4a0e LP |
607 | } |
608 | ||
609 | static int synthetic_nobody_user_build(UserRecord **ret) { | |
610 | return user_record_build( | |
611 | ret, | |
0cdf6b14 | 612 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("userName", JSON_BUILD_CONST_STRING(NOBODY_USER_NAME)), |
ec8e4a0e LP |
613 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(UID_NOBODY)), |
614 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), | |
0cdf6b14 | 615 | JSON_BUILD_PAIR("shell", JSON_BUILD_CONST_STRING(NOLOGIN)), |
ec8e4a0e | 616 | JSON_BUILD_PAIR("locked", JSON_BUILD_BOOLEAN(true)), |
0cdf6b14 | 617 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
618 | } |
619 | ||
620 | int userdb_by_name(const char *name, UserDBFlags flags, UserRecord **ret) { | |
621 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
622 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
623 | int r; | |
624 | ||
7a8867ab | 625 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
626 | return -EINVAL; |
627 | ||
628 | r = json_build(&query, JSON_BUILD_OBJECT( | |
629 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
630 | if (r < 0) | |
631 | return r; | |
632 | ||
7c674191 | 633 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
634 | if (!iterator) |
635 | return -ENOMEM; | |
636 | ||
637 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
638 | if (r >= 0) { | |
639 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
640 | if (r >= 0) | |
641 | return r; | |
642 | } | |
643 | ||
85f088ab LP |
644 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
645 | r = dropin_user_record_by_name(name, NULL, flags, ret); | |
646 | if (r >= 0) | |
647 | return r; | |
648 | } | |
649 | ||
80d88a82 | 650 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 | 651 | /* Make sure the NSS lookup doesn't recurse back to us. */ |
ec8e4a0e | 652 | |
037b0a47 LP |
653 | r = userdb_iterator_block_nss_systemd(iterator); |
654 | if (r >= 0) { | |
ec8e4a0e | 655 | /* Client-side NSS fallback */ |
80d88a82 | 656 | r = nss_user_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
657 | if (r >= 0) |
658 | return r; | |
659 | } | |
660 | } | |
661 | ||
662 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
663 | if (streq(name, "root")) | |
664 | return synthetic_root_user_build(ret); | |
665 | ||
666 | if (streq(name, NOBODY_USER_NAME) && synthesize_nobody()) | |
667 | return synthetic_nobody_user_build(ret); | |
668 | } | |
669 | ||
670 | return r; | |
671 | } | |
672 | ||
673 | int userdb_by_uid(uid_t uid, UserDBFlags flags, UserRecord **ret) { | |
674 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
675 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
676 | int r; | |
677 | ||
678 | if (!uid_is_valid(uid)) | |
679 | return -EINVAL; | |
680 | ||
681 | r = json_build(&query, JSON_BUILD_OBJECT( | |
682 | JSON_BUILD_PAIR("uid", JSON_BUILD_UNSIGNED(uid)))); | |
683 | if (r < 0) | |
684 | return r; | |
685 | ||
7c674191 | 686 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
687 | if (!iterator) |
688 | return -ENOMEM; | |
689 | ||
690 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", false, query, flags); | |
691 | if (r >= 0) { | |
692 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
693 | if (r >= 0) | |
694 | return r; | |
695 | } | |
696 | ||
85f088ab LP |
697 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !iterator->dropin_covered) { |
698 | r = dropin_user_record_by_uid(uid, NULL, flags, ret); | |
699 | if (r >= 0) | |
700 | return r; | |
701 | } | |
702 | ||
80d88a82 | 703 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !iterator->nss_covered) { |
037b0a47 LP |
704 | r = userdb_iterator_block_nss_systemd(iterator); |
705 | if (r >= 0) { | |
ec8e4a0e | 706 | /* Client-side NSS fallback */ |
80d88a82 | 707 | r = nss_user_record_by_uid(uid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
708 | if (r >= 0) |
709 | return r; | |
710 | } | |
711 | } | |
712 | ||
713 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
714 | if (uid == 0) | |
715 | return synthetic_root_user_build(ret); | |
716 | ||
717 | if (uid == UID_NOBODY && synthesize_nobody()) | |
718 | return synthetic_nobody_user_build(ret); | |
719 | } | |
720 | ||
721 | return r; | |
722 | } | |
723 | ||
724 | int userdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
725 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 726 | int r, qr; |
ec8e4a0e LP |
727 | |
728 | assert(ret); | |
729 | ||
7c674191 | 730 | iterator = userdb_iterator_new(LOOKUP_USER, flags); |
ec8e4a0e LP |
731 | if (!iterator) |
732 | return -ENOMEM; | |
733 | ||
85f088ab | 734 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetUserRecord", true, NULL, flags); |
ec8e4a0e | 735 | |
85f088ab | 736 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
737 | r = userdb_iterator_block_nss_systemd(iterator); |
738 | if (r < 0) | |
739 | return r; | |
ec8e4a0e LP |
740 | |
741 | setpwent(); | |
742 | iterator->nss_iterating = true; | |
85f088ab LP |
743 | } |
744 | ||
745 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
746 | r = conf_files_list_nulstr( | |
747 | &iterator->dropins, | |
748 | ".user", | |
749 | NULL, | |
750 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
751 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
752 | if (r < 0) | |
753 | log_debug_errno(r, "Failed to find user drop-ins, ignoring: %m"); | |
754 | } | |
755 | ||
756 | /* propagate IPC error, but only if there are no drop-ins */ | |
757 | if (qr < 0 && | |
758 | !iterator->nss_iterating && | |
759 | strv_isempty(iterator->dropins)) | |
760 | return qr; | |
ec8e4a0e | 761 | |
ec8e4a0e LP |
762 | *ret = TAKE_PTR(iterator); |
763 | return 0; | |
764 | } | |
765 | ||
766 | int userdb_iterator_get(UserDBIterator *iterator, UserRecord **ret) { | |
767 | int r; | |
768 | ||
769 | assert(iterator); | |
770 | assert(iterator->what == LOOKUP_USER); | |
771 | ||
772 | if (iterator->nss_iterating) { | |
773 | struct passwd *pw; | |
774 | ||
775 | /* If NSS isn't covered elsewhere, let's iterate through it first, since it probably contains | |
776 | * the more traditional sources, which are probably good to show first. */ | |
777 | ||
778 | pw = getpwent(); | |
779 | if (pw) { | |
780 | _cleanup_free_ char *buffer = NULL; | |
781 | bool incomplete = false; | |
782 | struct spwd spwd; | |
783 | ||
784 | if (streq_ptr(pw->pw_name, "root")) | |
785 | iterator->synthesize_root = false; | |
786 | if (pw->pw_uid == UID_NOBODY) | |
787 | iterator->synthesize_nobody = false; | |
788 | ||
80d88a82 | 789 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
790 | r = nss_spwd_for_passwd(pw, &spwd, &buffer); |
791 | if (r < 0) { | |
792 | log_debug_errno(r, "Failed to acquire shadow entry for user %s, ignoring: %m", pw->pw_name); | |
793 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
794 | } | |
795 | } else { | |
796 | r = -EUCLEAN; | |
797 | incomplete = true; | |
ec8e4a0e LP |
798 | } |
799 | ||
800 | r = nss_passwd_to_user_record(pw, r >= 0 ? &spwd : NULL, ret); | |
801 | if (r < 0) | |
802 | return r; | |
803 | ||
804 | if (ret) | |
805 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
806 | |
807 | iterator->n_found++; | |
ec8e4a0e LP |
808 | return r; |
809 | } | |
810 | ||
811 | if (errno != 0) | |
812 | log_debug_errno(errno, "Failure to iterate NSS user database, ignoring: %m"); | |
813 | ||
814 | iterator->nss_iterating = false; | |
815 | endpwent(); | |
816 | } | |
817 | ||
85f088ab LP |
818 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
819 | const char *i = iterator->dropins[iterator->current_dropin]; | |
820 | _cleanup_free_ char *fn = NULL; | |
821 | uid_t uid; | |
822 | char *e; | |
ec8e4a0e | 823 | |
85f088ab LP |
824 | /* Next, let's add in the static drop-ins, which are quick to retrieve */ |
825 | ||
826 | r = path_extract_filename(i, &fn); | |
827 | if (r < 0) | |
828 | return r; | |
829 | ||
830 | e = endswith(fn, ".user"); /* not actually a .user file? Then skip to next */ | |
831 | if (!e) | |
832 | continue; | |
833 | ||
834 | *e = 0; /* Chop off suffix */ | |
835 | ||
836 | if (parse_uid(fn, &uid) < 0) /* not a UID .user file? Then skip to next */ | |
837 | continue; | |
838 | ||
839 | r = dropin_user_record_by_uid(uid, i, iterator->flags, ret); | |
840 | if (r < 0) { | |
841 | log_debug_errno(r, "Failed to parse user record for UID " UID_FMT ", ignoring: %m", uid); | |
842 | continue; /* If we failed to parse this record, let's suppress it from enumeration, | |
843 | * and continue with the next record. Maybe someone is dropping it files | |
844 | * and only partially wrote this one. */ | |
845 | } | |
846 | ||
847 | iterator->current_dropin++; /* make sure on the next call of userdb_iterator_get() we continue with the next dropin */ | |
848 | iterator->n_found++; | |
849 | return 0; | |
850 | } | |
851 | ||
852 | /* Then, let's return the users provided by varlink IPC */ | |
853 | r = userdb_process(iterator, ret, NULL, NULL, NULL); | |
ec8e4a0e | 854 | if (r < 0) { |
85f088ab LP |
855 | |
856 | /* Finally, synthesize root + nobody if not done yet */ | |
ec8e4a0e LP |
857 | if (iterator->synthesize_root) { |
858 | iterator->synthesize_root = false; | |
859 | iterator->n_found++; | |
860 | return synthetic_root_user_build(ret); | |
861 | } | |
862 | ||
863 | if (iterator->synthesize_nobody) { | |
864 | iterator->synthesize_nobody = false; | |
865 | iterator->n_found++; | |
866 | return synthetic_nobody_user_build(ret); | |
867 | } | |
ec8e4a0e | 868 | |
77fe7d15 LP |
869 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
870 | if (iterator->n_found > 0) | |
871 | return -ESRCH; | |
872 | } | |
ec8e4a0e LP |
873 | |
874 | return r; | |
875 | } | |
876 | ||
877 | static int synthetic_root_group_build(GroupRecord **ret) { | |
878 | return group_record_build( | |
879 | ret, | |
0cdf6b14 | 880 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_CONST_STRING("root")), |
ec8e4a0e | 881 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(0)), |
0cdf6b14 | 882 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
883 | } |
884 | ||
885 | static int synthetic_nobody_group_build(GroupRecord **ret) { | |
886 | return group_record_build( | |
887 | ret, | |
0cdf6b14 | 888 | JSON_BUILD_OBJECT(JSON_BUILD_PAIR("groupName", JSON_BUILD_CONST_STRING(NOBODY_GROUP_NAME)), |
ec8e4a0e | 889 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(GID_NOBODY)), |
0cdf6b14 | 890 | JSON_BUILD_PAIR("disposition", JSON_BUILD_CONST_STRING("intrinsic")))); |
ec8e4a0e LP |
891 | } |
892 | ||
893 | int groupdb_by_name(const char *name, UserDBFlags flags, GroupRecord **ret) { | |
894 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
895 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
896 | int r; | |
897 | ||
7a8867ab | 898 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
899 | return -EINVAL; |
900 | ||
901 | r = json_build(&query, JSON_BUILD_OBJECT( | |
902 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
903 | if (r < 0) | |
904 | return r; | |
905 | ||
7c674191 | 906 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
907 | if (!iterator) |
908 | return -ENOMEM; | |
909 | ||
910 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
911 | if (r >= 0) { | |
912 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
913 | if (r >= 0) | |
914 | return r; | |
915 | } | |
916 | ||
85f088ab LP |
917 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
918 | r = dropin_group_record_by_name(name, NULL, flags, ret); | |
919 | if (r >= 0) | |
920 | return r; | |
921 | } | |
922 | ||
923 | ||
80d88a82 | 924 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
925 | r = userdb_iterator_block_nss_systemd(iterator); |
926 | if (r >= 0) { | |
80d88a82 | 927 | r = nss_group_record_by_name(name, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
928 | if (r >= 0) |
929 | return r; | |
930 | } | |
931 | } | |
932 | ||
933 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
934 | if (streq(name, "root")) | |
935 | return synthetic_root_group_build(ret); | |
936 | ||
937 | if (streq(name, NOBODY_GROUP_NAME) && synthesize_nobody()) | |
938 | return synthetic_nobody_group_build(ret); | |
939 | } | |
940 | ||
941 | return r; | |
942 | } | |
943 | ||
944 | int groupdb_by_gid(gid_t gid, UserDBFlags flags, GroupRecord **ret) { | |
945 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
946 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
947 | int r; | |
948 | ||
949 | if (!gid_is_valid(gid)) | |
950 | return -EINVAL; | |
951 | ||
952 | r = json_build(&query, JSON_BUILD_OBJECT( | |
953 | JSON_BUILD_PAIR("gid", JSON_BUILD_UNSIGNED(gid)))); | |
954 | if (r < 0) | |
955 | return r; | |
956 | ||
7c674191 | 957 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
958 | if (!iterator) |
959 | return -ENOMEM; | |
960 | ||
961 | r = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", false, query, flags); | |
962 | if (r >= 0) { | |
963 | r = userdb_process(iterator, NULL, ret, NULL, NULL); | |
964 | if (r >= 0) | |
965 | return r; | |
966 | } | |
967 | ||
85f088ab LP |
968 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && !(iterator && iterator->dropin_covered)) { |
969 | r = dropin_group_record_by_gid(gid, NULL, flags, ret); | |
970 | if (r >= 0) | |
971 | return r; | |
972 | } | |
973 | ||
80d88a82 | 974 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && !(iterator && iterator->nss_covered)) { |
037b0a47 LP |
975 | r = userdb_iterator_block_nss_systemd(iterator); |
976 | if (r >= 0) { | |
80d88a82 | 977 | r = nss_group_record_by_gid(gid, !FLAGS_SET(flags, USERDB_SUPPRESS_SHADOW), ret); |
ec8e4a0e LP |
978 | if (r >= 0) |
979 | return r; | |
980 | } | |
981 | } | |
982 | ||
983 | if (!FLAGS_SET(flags, USERDB_DONT_SYNTHESIZE)) { | |
984 | if (gid == 0) | |
985 | return synthetic_root_group_build(ret); | |
986 | ||
987 | if (gid == GID_NOBODY && synthesize_nobody()) | |
988 | return synthetic_nobody_group_build(ret); | |
989 | } | |
990 | ||
991 | return r; | |
992 | } | |
993 | ||
994 | int groupdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
995 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 996 | int r, qr; |
ec8e4a0e LP |
997 | |
998 | assert(ret); | |
999 | ||
7c674191 | 1000 | iterator = userdb_iterator_new(LOOKUP_GROUP, flags); |
ec8e4a0e LP |
1001 | if (!iterator) |
1002 | return -ENOMEM; | |
1003 | ||
85f088ab | 1004 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetGroupRecord", true, NULL, flags); |
ec8e4a0e | 1005 | |
85f088ab | 1006 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
037b0a47 LP |
1007 | r = userdb_iterator_block_nss_systemd(iterator); |
1008 | if (r < 0) | |
1009 | return r; | |
ec8e4a0e LP |
1010 | |
1011 | setgrent(); | |
1012 | iterator->nss_iterating = true; | |
85f088ab LP |
1013 | } |
1014 | ||
1015 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) { | |
1016 | r = conf_files_list_nulstr( | |
1017 | &iterator->dropins, | |
1018 | ".group", | |
1019 | NULL, | |
1020 | CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, | |
1021 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1022 | if (r < 0) | |
1023 | log_debug_errno(r, "Failed to find group drop-ins, ignoring: %m"); | |
1024 | } | |
1025 | ||
1026 | if (qr < 0 && | |
1027 | !iterator->nss_iterating && | |
1028 | strv_isempty(iterator->dropins)) | |
1029 | return qr; | |
ec8e4a0e | 1030 | |
ec8e4a0e LP |
1031 | *ret = TAKE_PTR(iterator); |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | int groupdb_iterator_get(UserDBIterator *iterator, GroupRecord **ret) { | |
1036 | int r; | |
1037 | ||
1038 | assert(iterator); | |
1039 | assert(iterator->what == LOOKUP_GROUP); | |
1040 | ||
1041 | if (iterator->nss_iterating) { | |
1042 | struct group *gr; | |
1043 | ||
1044 | errno = 0; | |
1045 | gr = getgrent(); | |
1046 | if (gr) { | |
1047 | _cleanup_free_ char *buffer = NULL; | |
1048 | bool incomplete = false; | |
1049 | struct sgrp sgrp; | |
1050 | ||
1051 | if (streq_ptr(gr->gr_name, "root")) | |
1052 | iterator->synthesize_root = false; | |
1053 | if (gr->gr_gid == GID_NOBODY) | |
1054 | iterator->synthesize_nobody = false; | |
1055 | ||
80d88a82 | 1056 | if (!FLAGS_SET(iterator->flags, USERDB_SUPPRESS_SHADOW)) { |
7c674191 LP |
1057 | r = nss_sgrp_for_group(gr, &sgrp, &buffer); |
1058 | if (r < 0) { | |
1059 | log_debug_errno(r, "Failed to acquire shadow entry for group %s, ignoring: %m", gr->gr_name); | |
1060 | incomplete = ERRNO_IS_PRIVILEGE(r); | |
1061 | } | |
1062 | } else { | |
1063 | r = -EUCLEAN; | |
1064 | incomplete = true; | |
ec8e4a0e LP |
1065 | } |
1066 | ||
1067 | r = nss_group_to_group_record(gr, r >= 0 ? &sgrp : NULL, ret); | |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | ||
1071 | if (ret) | |
1072 | (*ret)->incomplete = incomplete; | |
27a5a22f LP |
1073 | |
1074 | iterator->n_found++; | |
ec8e4a0e LP |
1075 | return r; |
1076 | } | |
1077 | ||
1078 | if (errno != 0) | |
1079 | log_debug_errno(errno, "Failure to iterate NSS group database, ignoring: %m"); | |
1080 | ||
1081 | iterator->nss_iterating = false; | |
1082 | endgrent(); | |
1083 | } | |
1084 | ||
85f088ab LP |
1085 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1086 | const char *i = iterator->dropins[iterator->current_dropin]; | |
1087 | _cleanup_free_ char *fn = NULL; | |
1088 | gid_t gid; | |
1089 | char *e; | |
1090 | ||
1091 | r = path_extract_filename(i, &fn); | |
1092 | if (r < 0) | |
1093 | return r; | |
1094 | ||
1095 | e = endswith(fn, ".group"); | |
1096 | if (!e) | |
1097 | continue; | |
1098 | ||
1099 | *e = 0; /* Chop off suffix */ | |
1100 | ||
1101 | if (parse_gid(fn, &gid) < 0) | |
1102 | continue; | |
1103 | ||
1104 | r = dropin_group_record_by_gid(gid, i, iterator->flags, ret); | |
1105 | if (r < 0) { | |
1106 | log_debug_errno(r, "Failed to parse group record for GID " GID_FMT ", ignoring: %m", gid); | |
1107 | continue; | |
1108 | } | |
1109 | ||
1110 | iterator->current_dropin++; | |
1111 | iterator->n_found++; | |
1112 | return 0; | |
1113 | } | |
1114 | ||
ec8e4a0e LP |
1115 | r = userdb_process(iterator, NULL, ret, NULL, NULL); |
1116 | if (r < 0) { | |
1117 | if (iterator->synthesize_root) { | |
1118 | iterator->synthesize_root = false; | |
1119 | iterator->n_found++; | |
1120 | return synthetic_root_group_build(ret); | |
1121 | } | |
1122 | ||
1123 | if (iterator->synthesize_nobody) { | |
1124 | iterator->synthesize_nobody = false; | |
1125 | iterator->n_found++; | |
1126 | return synthetic_nobody_group_build(ret); | |
1127 | } | |
ec8e4a0e | 1128 | |
77fe7d15 LP |
1129 | /* if we found at least one entry, then ignore errors and indicate that we reached the end */ |
1130 | if (iterator->n_found > 0) | |
1131 | return -ESRCH; | |
1132 | } | |
ec8e4a0e LP |
1133 | |
1134 | return r; | |
1135 | } | |
1136 | ||
85f088ab LP |
1137 | static void discover_membership_dropins(UserDBIterator *i, UserDBFlags flags) { |
1138 | int r; | |
1139 | ||
1140 | r = conf_files_list_nulstr( | |
1141 | &i->dropins, | |
1142 | ".membership", | |
1143 | NULL, | |
1144 | CONF_FILES_REGULAR|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, | |
1145 | USERDB_DROPIN_DIR_NULSTR("userdb")); | |
1146 | if (r < 0) | |
1147 | log_debug_errno(r, "Failed to find membership drop-ins, ignoring: %m"); | |
1148 | } | |
1149 | ||
ec8e4a0e LP |
1150 | int membershipdb_by_user(const char *name, UserDBFlags flags, UserDBIterator **ret) { |
1151 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1152 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1153 | int r, qr; |
ec8e4a0e LP |
1154 | |
1155 | assert(ret); | |
1156 | ||
7a8867ab | 1157 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1158 | return -EINVAL; |
1159 | ||
1160 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1161 | JSON_BUILD_PAIR("userName", JSON_BUILD_STRING(name)))); | |
1162 | if (r < 0) | |
1163 | return r; | |
1164 | ||
7c674191 | 1165 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1166 | if (!iterator) |
1167 | return -ENOMEM; | |
1168 | ||
ec8e4a0e LP |
1169 | iterator->filter_user_name = strdup(name); |
1170 | if (!iterator->filter_user_name) | |
1171 | return -ENOMEM; | |
1172 | ||
85f088ab LP |
1173 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
1174 | ||
1175 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { | |
1176 | r = userdb_iterator_block_nss_systemd(iterator); | |
1177 | if (r < 0) | |
1178 | return r; | |
ec8e4a0e | 1179 | |
85f088ab LP |
1180 | setgrent(); |
1181 | iterator->nss_iterating = true; | |
1182 | } | |
ec8e4a0e | 1183 | |
85f088ab LP |
1184 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1185 | discover_membership_dropins(iterator, flags); | |
1186 | ||
1187 | if (qr < 0 && | |
1188 | !iterator->nss_iterating && | |
1189 | strv_isempty(iterator->dropins)) | |
1190 | return qr; | |
1191 | ||
1192 | *ret = TAKE_PTR(iterator); | |
1193 | return 0; | |
ec8e4a0e LP |
1194 | } |
1195 | ||
1196 | int membershipdb_by_group(const char *name, UserDBFlags flags, UserDBIterator **ret) { | |
1197 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1198 | _cleanup_(json_variant_unrefp) JsonVariant *query = NULL; | |
85f088ab | 1199 | int r, qr; |
ec8e4a0e LP |
1200 | |
1201 | assert(ret); | |
1202 | ||
7a8867ab | 1203 | if (!valid_user_group_name(name, VALID_USER_RELAX)) |
ec8e4a0e LP |
1204 | return -EINVAL; |
1205 | ||
1206 | r = json_build(&query, JSON_BUILD_OBJECT( | |
1207 | JSON_BUILD_PAIR("groupName", JSON_BUILD_STRING(name)))); | |
1208 | if (r < 0) | |
1209 | return r; | |
1210 | ||
7c674191 | 1211 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1212 | if (!iterator) |
1213 | return -ENOMEM; | |
1214 | ||
85f088ab LP |
1215 | iterator->filter_group_name = strdup(name); |
1216 | if (!iterator->filter_group_name) | |
1217 | return -ENOMEM; | |
ec8e4a0e | 1218 | |
85f088ab | 1219 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, query, flags); |
ec8e4a0e | 1220 | |
85f088ab LP |
1221 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1222 | _cleanup_(group_record_unrefp) GroupRecord *gr = NULL; | |
ec8e4a0e | 1223 | |
85f088ab LP |
1224 | r = userdb_iterator_block_nss_systemd(iterator); |
1225 | if (r < 0) | |
1226 | return r; | |
ec8e4a0e | 1227 | |
85f088ab LP |
1228 | /* We ignore all errors here, since the group might be defined by a userdb native service, and we queried them already above. */ |
1229 | (void) nss_group_record_by_name(name, false, &gr); | |
1230 | if (gr) { | |
1231 | iterator->members_of_group = strv_copy(gr->members); | |
1232 | if (!iterator->members_of_group) | |
1233 | return -ENOMEM; | |
1234 | ||
1235 | iterator->index_members_of_group = 0; | |
1236 | ||
1237 | iterator->found_group_name = strdup(name); | |
1238 | if (!iterator->found_group_name) | |
1239 | return -ENOMEM; | |
1240 | } | |
ec8e4a0e LP |
1241 | } |
1242 | ||
85f088ab LP |
1243 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1244 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1245 | |
85f088ab LP |
1246 | if (qr < 0 && |
1247 | strv_isempty(iterator->members_of_group) && | |
1248 | strv_isempty(iterator->dropins)) | |
1249 | return qr; | |
ec8e4a0e | 1250 | |
85f088ab LP |
1251 | *ret = TAKE_PTR(iterator); |
1252 | return 0; | |
ec8e4a0e LP |
1253 | } |
1254 | ||
1255 | int membershipdb_all(UserDBFlags flags, UserDBIterator **ret) { | |
1256 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
85f088ab | 1257 | int r, qr; |
ec8e4a0e LP |
1258 | |
1259 | assert(ret); | |
1260 | ||
7c674191 | 1261 | iterator = userdb_iterator_new(LOOKUP_MEMBERSHIP, flags); |
ec8e4a0e LP |
1262 | if (!iterator) |
1263 | return -ENOMEM; | |
1264 | ||
85f088ab | 1265 | qr = userdb_start_query(iterator, "io.systemd.UserDatabase.GetMemberships", true, NULL, flags); |
ec8e4a0e | 1266 | |
85f088ab LP |
1267 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_NSS) && (qr < 0 || !iterator->nss_covered)) { |
1268 | r = userdb_iterator_block_nss_systemd(iterator); | |
1269 | if (r < 0) | |
1270 | return r; | |
ec8e4a0e | 1271 | |
85f088ab LP |
1272 | setgrent(); |
1273 | iterator->nss_iterating = true; | |
1274 | } | |
ec8e4a0e | 1275 | |
85f088ab LP |
1276 | if (!FLAGS_SET(flags, USERDB_EXCLUDE_DROPIN) && (qr < 0 || !iterator->dropin_covered)) |
1277 | discover_membership_dropins(iterator, flags); | |
ec8e4a0e | 1278 | |
85f088ab LP |
1279 | if (qr < 0 && |
1280 | !iterator->nss_iterating && | |
1281 | strv_isempty(iterator->dropins)) | |
1282 | return qr; | |
ec8e4a0e | 1283 | |
85f088ab LP |
1284 | *ret = TAKE_PTR(iterator); |
1285 | return 0; | |
ec8e4a0e LP |
1286 | } |
1287 | ||
1288 | int membershipdb_iterator_get( | |
1289 | UserDBIterator *iterator, | |
1290 | char **ret_user, | |
1291 | char **ret_group) { | |
1292 | ||
1293 | int r; | |
1294 | ||
1295 | assert(iterator); | |
1296 | ||
1297 | for (;;) { | |
d9f5f2a1 | 1298 | /* If we are iterating through NSS acquire a new group entry if we haven't acquired one yet. */ |
ec8e4a0e LP |
1299 | if (!iterator->members_of_group) { |
1300 | struct group *g; | |
1301 | ||
1302 | if (!iterator->nss_iterating) | |
1303 | break; | |
1304 | ||
1305 | assert(!iterator->found_user_name); | |
1306 | do { | |
1307 | errno = 0; | |
1308 | g = getgrent(); | |
1309 | if (!g) { | |
1310 | if (errno != 0) | |
1311 | log_debug_errno(errno, "Failure during NSS group iteration, ignoring: %m"); | |
1312 | break; | |
1313 | } | |
1314 | ||
1315 | } while (iterator->filter_user_name ? !strv_contains(g->gr_mem, iterator->filter_user_name) : | |
1316 | strv_isempty(g->gr_mem)); | |
1317 | ||
1318 | if (g) { | |
1319 | r = free_and_strdup(&iterator->found_group_name, g->gr_name); | |
1320 | if (r < 0) | |
1321 | return r; | |
1322 | ||
1323 | if (iterator->filter_user_name) | |
1324 | iterator->members_of_group = strv_new(iterator->filter_user_name); | |
1325 | else | |
1326 | iterator->members_of_group = strv_copy(g->gr_mem); | |
1327 | if (!iterator->members_of_group) | |
1328 | return -ENOMEM; | |
1329 | ||
1330 | iterator->index_members_of_group = 0; | |
1331 | } else { | |
1332 | iterator->nss_iterating = false; | |
1333 | endgrent(); | |
1334 | break; | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | assert(iterator->found_group_name); | |
1339 | assert(iterator->members_of_group); | |
1340 | assert(!iterator->found_user_name); | |
1341 | ||
1342 | if (iterator->members_of_group[iterator->index_members_of_group]) { | |
1343 | _cleanup_free_ char *cu = NULL, *cg = NULL; | |
1344 | ||
1345 | if (ret_user) { | |
1346 | cu = strdup(iterator->members_of_group[iterator->index_members_of_group]); | |
1347 | if (!cu) | |
1348 | return -ENOMEM; | |
1349 | } | |
1350 | ||
1351 | if (ret_group) { | |
1352 | cg = strdup(iterator->found_group_name); | |
1353 | if (!cg) | |
1354 | return -ENOMEM; | |
1355 | } | |
1356 | ||
1357 | if (ret_user) | |
1358 | *ret_user = TAKE_PTR(cu); | |
1359 | ||
1360 | if (ret_group) | |
1361 | *ret_group = TAKE_PTR(cg); | |
1362 | ||
1363 | iterator->index_members_of_group++; | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | iterator->members_of_group = strv_free(iterator->members_of_group); | |
1368 | iterator->found_group_name = mfree(iterator->found_group_name); | |
1369 | } | |
1370 | ||
85f088ab LP |
1371 | for (; iterator->dropins && iterator->dropins[iterator->current_dropin]; iterator->current_dropin++) { |
1372 | const char *i = iterator->dropins[iterator->current_dropin], *e, *c; | |
1373 | _cleanup_free_ char *un = NULL, *gn = NULL; | |
1374 | ||
1375 | e = endswith(i, ".membership"); | |
1376 | if (!e) | |
1377 | continue; | |
1378 | ||
1379 | c = memchr(i, ':', e - i); | |
1380 | if (!c) | |
1381 | continue; | |
1382 | ||
1383 | un = strndup(i, c - i); | |
1384 | if (!un) | |
1385 | return -ENOMEM; | |
1386 | if (iterator->filter_user_name) { | |
1387 | if (!streq(un, iterator->filter_user_name)) | |
1388 | continue; | |
1389 | } else if (!valid_user_group_name(un, VALID_USER_RELAX)) | |
1390 | continue; | |
1391 | ||
1392 | c++; /* skip over ':' */ | |
1393 | gn = strndup(c, e - c); | |
1394 | if (!gn) | |
1395 | return -ENOMEM; | |
1396 | if (iterator->filter_group_name) { | |
1397 | if (!streq(gn, iterator->filter_group_name)) | |
1398 | continue; | |
1399 | } else if (!valid_user_group_name(gn, VALID_USER_RELAX)) | |
1400 | continue; | |
1401 | ||
1402 | iterator->current_dropin++; | |
1403 | iterator->n_found++; | |
1404 | ||
1405 | if (ret_user) | |
1406 | *ret_user = TAKE_PTR(un); | |
1407 | if (ret_group) | |
1408 | *ret_group = TAKE_PTR(gn); | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
ec8e4a0e LP |
1413 | r = userdb_process(iterator, NULL, NULL, ret_user, ret_group); |
1414 | if (r < 0 && iterator->n_found > 0) | |
1415 | return -ESRCH; | |
1416 | ||
1417 | return r; | |
1418 | } | |
1419 | ||
1420 | int membershipdb_by_group_strv(const char *name, UserDBFlags flags, char ***ret) { | |
1421 | _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL; | |
1422 | _cleanup_strv_free_ char **members = NULL; | |
1423 | int r; | |
1424 | ||
1425 | assert(name); | |
1426 | assert(ret); | |
1427 | ||
1428 | r = membershipdb_by_group(name, flags, &iterator); | |
1429 | if (r < 0) | |
1430 | return r; | |
1431 | ||
1432 | for (;;) { | |
1433 | _cleanup_free_ char *user_name = NULL; | |
1434 | ||
1435 | r = membershipdb_iterator_get(iterator, &user_name, NULL); | |
1436 | if (r == -ESRCH) | |
1437 | break; | |
1438 | if (r < 0) | |
1439 | return r; | |
1440 | ||
1441 | r = strv_consume(&members, TAKE_PTR(user_name)); | |
1442 | if (r < 0) | |
1443 | return r; | |
1444 | } | |
1445 | ||
1446 | strv_sort(members); | |
1447 | strv_uniq(members); | |
1448 | ||
1449 | *ret = TAKE_PTR(members); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
037b0a47 LP |
1453 | int userdb_block_nss_systemd(int b) { |
1454 | _cleanup_(dlclosep) void *dl = NULL; | |
1455 | int (*call)(bool b); | |
ec8e4a0e | 1456 | |
037b0a47 | 1457 | /* Note that we might be called from libnss_systemd.so.2 itself, but that should be fine, really. */ |
ec8e4a0e | 1458 | |
a127c620 | 1459 | dl = dlopen(ROOTLIBDIR "/libnss_systemd.so.2", RTLD_LAZY|RTLD_NODELETE); |
037b0a47 LP |
1460 | if (!dl) { |
1461 | /* If the file isn't installed, don't complain loudly */ | |
1462 | log_debug("Failed to dlopen(libnss_systemd.so.2), ignoring: %s", dlerror()); | |
1463 | return 0; | |
ec8e4a0e LP |
1464 | } |
1465 | ||
037b0a47 LP |
1466 | call = (int (*)(bool b)) dlsym(dl, "_nss_systemd_block"); |
1467 | if (!call) | |
fa027117 | 1468 | /* If the file is installed but lacks the symbol we expect, things are weird, let's complain */ |
037b0a47 LP |
1469 | return log_debug_errno(SYNTHETIC_ERRNO(ELIBBAD), |
1470 | "Unable to find symbol _nss_systemd_block in libnss_systemd.so.2: %s", dlerror()); | |
ec8e4a0e | 1471 | |
037b0a47 | 1472 | return call(b); |
ec8e4a0e | 1473 | } |