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Commit | Line | Data |
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cabb0bc6 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
cabb0bc6 | 20 | #include <netdb.h> |
07630cea | 21 | #include <nss.h> |
cabb0bc6 LP |
22 | |
23 | #include "sd-bus.h" | |
24 | #include "sd-login.h" | |
07630cea | 25 | |
b5efdb8a | 26 | #include "alloc-util.h" |
c01ff965 | 27 | #include "bus-common-errors.h" |
25300b5a | 28 | #include "hostname-util.h" |
07630cea LP |
29 | #include "in-addr-util.h" |
30 | #include "macro.h" | |
31 | #include "nss-util.h" | |
0c5eb056 | 32 | #include "signal-util.h" |
07630cea | 33 | #include "string-util.h" |
b1d4f8e1 | 34 | #include "user-util.h" |
07630cea | 35 | #include "util.h" |
cabb0bc6 LP |
36 | |
37 | NSS_GETHOSTBYNAME_PROTOTYPES(mymachines); | |
c01ff965 LP |
38 | NSS_GETPW_PROTOTYPES(mymachines); |
39 | NSS_GETGR_PROTOTYPES(mymachines); | |
cabb0bc6 | 40 | |
0dd25fb9 | 41 | static int count_addresses(sd_bus_message *m, int af, unsigned *ret) { |
cabb0bc6 LP |
42 | unsigned c = 0; |
43 | int r; | |
44 | ||
45 | assert(m); | |
46 | assert(ret); | |
47 | ||
3a6fb33c | 48 | while ((r = sd_bus_message_enter_container(m, 'r', "iay")) > 0) { |
0dd25fb9 | 49 | int family; |
cabb0bc6 | 50 | |
0dd25fb9 | 51 | r = sd_bus_message_read(m, "i", &family); |
cabb0bc6 LP |
52 | if (r < 0) |
53 | return r; | |
54 | ||
55 | r = sd_bus_message_skip(m, "ay"); | |
56 | if (r < 0) | |
57 | return r; | |
58 | ||
59 | r = sd_bus_message_exit_container(m); | |
60 | if (r < 0) | |
61 | return r; | |
62 | ||
63 | if (af != AF_UNSPEC && family != af) | |
64 | continue; | |
65 | ||
66 | c ++; | |
67 | } | |
68 | if (r < 0) | |
69 | return r; | |
70 | ||
71 | r = sd_bus_message_rewind(m, false); | |
72 | if (r < 0) | |
73 | return r; | |
74 | ||
75 | *ret = c; | |
76 | return 0; | |
77 | } | |
78 | ||
79 | enum nss_status _nss_mymachines_gethostbyname4_r( | |
80 | const char *name, | |
81 | struct gaih_addrtuple **pat, | |
82 | char *buffer, size_t buflen, | |
83 | int *errnop, int *h_errnop, | |
84 | int32_t *ttlp) { | |
85 | ||
86 | struct gaih_addrtuple *r_tuple, *r_tuple_first = NULL; | |
4afd3348 LP |
87 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; |
88 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
634af566 | 89 | _cleanup_free_ int *ifindices = NULL; |
cabb0bc6 LP |
90 | _cleanup_free_ char *class = NULL; |
91 | size_t l, ms, idx; | |
92 | unsigned i = 0, c = 0; | |
93 | char *r_name; | |
634af566 | 94 | int n_ifindices, r; |
cabb0bc6 | 95 | |
0c5eb056 LP |
96 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
97 | ||
cabb0bc6 LP |
98 | assert(name); |
99 | assert(pat); | |
100 | assert(buffer); | |
101 | assert(errnop); | |
102 | assert(h_errnop); | |
103 | ||
104 | r = sd_machine_get_class(name, &class); | |
105 | if (r < 0) | |
106 | goto fail; | |
107 | if (!streq(class, "container")) { | |
108 | r = -ENOTTY; | |
109 | goto fail; | |
110 | } | |
111 | ||
634af566 LP |
112 | n_ifindices = sd_machine_get_ifindices(name, &ifindices); |
113 | if (n_ifindices < 0) { | |
114 | r = n_ifindices; | |
cabb0bc6 LP |
115 | goto fail; |
116 | } | |
117 | ||
118 | r = sd_bus_open_system(&bus); | |
119 | if (r < 0) | |
120 | goto fail; | |
121 | ||
122 | r = sd_bus_call_method(bus, | |
123 | "org.freedesktop.machine1", | |
124 | "/org/freedesktop/machine1", | |
125 | "org.freedesktop.machine1.Manager", | |
126 | "GetMachineAddresses", | |
127 | NULL, | |
128 | &reply, | |
129 | "s", name); | |
130 | if (r < 0) | |
131 | goto fail; | |
132 | ||
0dd25fb9 | 133 | r = sd_bus_message_enter_container(reply, 'a', "(iay)"); |
cabb0bc6 LP |
134 | if (r < 0) |
135 | goto fail; | |
136 | ||
137 | r = count_addresses(reply, AF_UNSPEC, &c); | |
138 | if (r < 0) | |
139 | goto fail; | |
140 | ||
141 | if (c <= 0) { | |
555bd6e9 | 142 | *errnop = ESRCH; |
cabb0bc6 LP |
143 | *h_errnop = HOST_NOT_FOUND; |
144 | return NSS_STATUS_NOTFOUND; | |
145 | } | |
146 | ||
147 | l = strlen(name); | |
148 | ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * c; | |
149 | if (buflen < ms) { | |
150 | *errnop = ENOMEM; | |
555bd6e9 | 151 | *h_errnop = TRY_AGAIN; |
cabb0bc6 LP |
152 | return NSS_STATUS_TRYAGAIN; |
153 | } | |
154 | ||
155 | /* First, append name */ | |
156 | r_name = buffer; | |
157 | memcpy(r_name, name, l+1); | |
158 | idx = ALIGN(l+1); | |
159 | ||
160 | /* Second, append addresses */ | |
161 | r_tuple_first = (struct gaih_addrtuple*) (buffer + idx); | |
0dd25fb9 LP |
162 | while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) { |
163 | int family; | |
cabb0bc6 LP |
164 | const void *a; |
165 | size_t sz; | |
166 | ||
0dd25fb9 | 167 | r = sd_bus_message_read(reply, "i", &family); |
cabb0bc6 LP |
168 | if (r < 0) |
169 | goto fail; | |
170 | ||
171 | r = sd_bus_message_read_array(reply, 'y', &a, &sz); | |
172 | if (r < 0) | |
173 | goto fail; | |
174 | ||
175 | r = sd_bus_message_exit_container(reply); | |
176 | if (r < 0) | |
177 | goto fail; | |
178 | ||
555bd6e9 LP |
179 | if (!IN_SET(family, AF_INET, AF_INET6)) { |
180 | r = -EAFNOSUPPORT; | |
181 | goto fail; | |
182 | } | |
183 | ||
9d485985 | 184 | if (sz != FAMILY_ADDRESS_SIZE(family)) { |
cabb0bc6 LP |
185 | r = -EINVAL; |
186 | goto fail; | |
187 | } | |
188 | ||
189 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
190 | r_tuple->next = i == c-1 ? NULL : (struct gaih_addrtuple*) ((char*) r_tuple + ALIGN(sizeof(struct gaih_addrtuple))); | |
191 | r_tuple->name = r_name; | |
192 | r_tuple->family = family; | |
634af566 | 193 | r_tuple->scopeid = n_ifindices == 1 ? ifindices[0] : 0; |
cabb0bc6 LP |
194 | memcpy(r_tuple->addr, a, sz); |
195 | ||
196 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
197 | i++; | |
198 | } | |
199 | ||
200 | assert(i == c); | |
201 | ||
202 | r = sd_bus_message_exit_container(reply); | |
203 | if (r < 0) | |
204 | goto fail; | |
205 | ||
206 | assert(idx == ms); | |
207 | ||
208 | if (*pat) | |
209 | **pat = *r_tuple_first; | |
210 | else | |
211 | *pat = r_tuple_first; | |
212 | ||
213 | if (ttlp) | |
214 | *ttlp = 0; | |
215 | ||
e70df46b LP |
216 | /* Explicitly reset all error variables */ |
217 | *errnop = 0; | |
218 | *h_errnop = NETDB_SUCCESS; | |
219 | h_errno = 0; | |
220 | ||
cabb0bc6 LP |
221 | return NSS_STATUS_SUCCESS; |
222 | ||
223 | fail: | |
224 | *errnop = -r; | |
225 | *h_errnop = NO_DATA; | |
226 | return NSS_STATUS_UNAVAIL; | |
227 | } | |
228 | ||
229 | enum nss_status _nss_mymachines_gethostbyname3_r( | |
230 | const char *name, | |
231 | int af, | |
232 | struct hostent *result, | |
233 | char *buffer, size_t buflen, | |
234 | int *errnop, int *h_errnop, | |
235 | int32_t *ttlp, | |
236 | char **canonp) { | |
237 | ||
4afd3348 LP |
238 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; |
239 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
cabb0bc6 LP |
240 | _cleanup_free_ char *class = NULL; |
241 | unsigned c = 0, i = 0; | |
242 | char *r_name, *r_aliases, *r_addr, *r_addr_list; | |
243 | size_t l, idx, ms, alen; | |
244 | int r; | |
245 | ||
0c5eb056 LP |
246 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
247 | ||
cabb0bc6 LP |
248 | assert(name); |
249 | assert(result); | |
250 | assert(buffer); | |
251 | assert(errnop); | |
252 | assert(h_errnop); | |
253 | ||
254 | if (af == AF_UNSPEC) | |
255 | af = AF_INET; | |
256 | ||
257 | if (af != AF_INET && af != AF_INET6) { | |
258 | r = -EAFNOSUPPORT; | |
259 | goto fail; | |
260 | } | |
261 | ||
262 | r = sd_machine_get_class(name, &class); | |
263 | if (r < 0) | |
264 | goto fail; | |
265 | if (!streq(class, "container")) { | |
266 | r = -ENOTTY; | |
267 | goto fail; | |
268 | } | |
269 | ||
270 | r = sd_bus_open_system(&bus); | |
271 | if (r < 0) | |
272 | goto fail; | |
273 | ||
274 | r = sd_bus_call_method(bus, | |
275 | "org.freedesktop.machine1", | |
276 | "/org/freedesktop/machine1", | |
277 | "org.freedesktop.machine1.Manager", | |
278 | "GetMachineAddresses", | |
279 | NULL, | |
280 | &reply, | |
281 | "s", name); | |
282 | if (r < 0) | |
283 | goto fail; | |
284 | ||
0dd25fb9 | 285 | r = sd_bus_message_enter_container(reply, 'a', "(iay)"); |
cabb0bc6 LP |
286 | if (r < 0) |
287 | goto fail; | |
288 | ||
289 | r = count_addresses(reply, af, &c); | |
290 | if (r < 0) | |
291 | goto fail; | |
292 | ||
293 | if (c <= 0) { | |
294 | *errnop = ENOENT; | |
295 | *h_errnop = HOST_NOT_FOUND; | |
296 | return NSS_STATUS_NOTFOUND; | |
297 | } | |
298 | ||
9d485985 | 299 | alen = FAMILY_ADDRESS_SIZE(af); |
cabb0bc6 LP |
300 | l = strlen(name); |
301 | ||
66a16e7e | 302 | ms = ALIGN(l+1) + c * ALIGN(alen) + (c+2) * sizeof(char*); |
cabb0bc6 LP |
303 | |
304 | if (buflen < ms) { | |
305 | *errnop = ENOMEM; | |
306 | *h_errnop = NO_RECOVERY; | |
307 | return NSS_STATUS_TRYAGAIN; | |
308 | } | |
309 | ||
310 | /* First, append name */ | |
311 | r_name = buffer; | |
312 | memcpy(r_name, name, l+1); | |
313 | idx = ALIGN(l+1); | |
314 | ||
315 | /* Second, create aliases array */ | |
316 | r_aliases = buffer + idx; | |
317 | ((char**) r_aliases)[0] = NULL; | |
318 | idx += sizeof(char*); | |
319 | ||
320 | /* Third, append addresses */ | |
321 | r_addr = buffer + idx; | |
0dd25fb9 LP |
322 | while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) { |
323 | int family; | |
cabb0bc6 LP |
324 | const void *a; |
325 | size_t sz; | |
326 | ||
0dd25fb9 | 327 | r = sd_bus_message_read(reply, "i", &family); |
cabb0bc6 LP |
328 | if (r < 0) |
329 | goto fail; | |
330 | ||
331 | r = sd_bus_message_read_array(reply, 'y', &a, &sz); | |
332 | if (r < 0) | |
333 | goto fail; | |
334 | ||
335 | r = sd_bus_message_exit_container(reply); | |
336 | if (r < 0) | |
337 | goto fail; | |
338 | ||
339 | if (family != af) | |
340 | continue; | |
341 | ||
342 | if (sz != alen) { | |
343 | r = -EINVAL; | |
344 | goto fail; | |
345 | } | |
346 | ||
347 | memcpy(r_addr + i*ALIGN(alen), a, alen); | |
348 | i++; | |
349 | } | |
350 | ||
351 | assert(i == c); | |
352 | idx += c * ALIGN(alen); | |
353 | ||
354 | r = sd_bus_message_exit_container(reply); | |
355 | if (r < 0) | |
356 | goto fail; | |
357 | ||
358 | /* Third, append address pointer array */ | |
359 | r_addr_list = buffer + idx; | |
360 | for (i = 0; i < c; i++) | |
361 | ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); | |
362 | ||
363 | ((char**) r_addr_list)[i] = NULL; | |
364 | idx += (c+1) * sizeof(char*); | |
365 | ||
366 | assert(idx == ms); | |
367 | ||
368 | result->h_name = r_name; | |
369 | result->h_aliases = (char**) r_aliases; | |
370 | result->h_addrtype = af; | |
371 | result->h_length = alen; | |
372 | result->h_addr_list = (char**) r_addr_list; | |
373 | ||
374 | if (ttlp) | |
375 | *ttlp = 0; | |
376 | ||
377 | if (canonp) | |
378 | *canonp = r_name; | |
379 | ||
e70df46b LP |
380 | /* Explicitly reset all error variables */ |
381 | *errnop = 0; | |
382 | *h_errnop = NETDB_SUCCESS; | |
383 | h_errno = 0; | |
384 | ||
cabb0bc6 LP |
385 | return NSS_STATUS_SUCCESS; |
386 | ||
387 | fail: | |
388 | *errnop = -r; | |
389 | *h_errnop = NO_DATA; | |
390 | return NSS_STATUS_UNAVAIL; | |
391 | } | |
392 | ||
c01ff965 LP |
393 | NSS_GETHOSTBYNAME_FALLBACKS(mymachines); |
394 | ||
395 | enum nss_status _nss_mymachines_getpwnam_r( | |
396 | const char *name, | |
397 | struct passwd *pwd, | |
398 | char *buffer, size_t buflen, | |
399 | int *errnop) { | |
400 | ||
4afd3348 LP |
401 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
402 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; | |
403 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
c01ff965 LP |
404 | const char *p, *e, *machine; |
405 | uint32_t mapped; | |
406 | uid_t uid; | |
407 | size_t l; | |
408 | int r; | |
409 | ||
0c5eb056 LP |
410 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
411 | ||
c01ff965 LP |
412 | assert(name); |
413 | assert(pwd); | |
414 | ||
415 | p = startswith(name, "vu-"); | |
416 | if (!p) | |
417 | goto not_found; | |
418 | ||
419 | e = strrchr(p, '-'); | |
420 | if (!e || e == p) | |
421 | goto not_found; | |
422 | ||
cb31827d ZJS |
423 | if (e - p > HOST_NAME_MAX - 1) /* -1 for the last dash */ |
424 | goto not_found; | |
425 | ||
c01ff965 LP |
426 | r = parse_uid(e + 1, &uid); |
427 | if (r < 0) | |
428 | goto not_found; | |
429 | ||
430 | machine = strndupa(p, e - p); | |
431 | if (!machine_name_is_valid(machine)) | |
432 | goto not_found; | |
433 | ||
434 | r = sd_bus_open_system(&bus); | |
435 | if (r < 0) | |
436 | goto fail; | |
437 | ||
438 | r = sd_bus_call_method(bus, | |
439 | "org.freedesktop.machine1", | |
440 | "/org/freedesktop/machine1", | |
441 | "org.freedesktop.machine1.Manager", | |
442 | "MapFromMachineUser", | |
443 | &error, | |
444 | &reply, | |
445 | "su", | |
446 | machine, (uint32_t) uid); | |
447 | if (r < 0) { | |
448 | if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_USER_MAPPING)) | |
449 | goto not_found; | |
450 | ||
451 | goto fail; | |
452 | } | |
453 | ||
454 | r = sd_bus_message_read(reply, "u", &mapped); | |
455 | if (r < 0) | |
456 | goto fail; | |
457 | ||
458 | l = strlen(name); | |
459 | if (buflen < l+1) { | |
460 | *errnop = ENOMEM; | |
461 | return NSS_STATUS_TRYAGAIN; | |
462 | } | |
463 | ||
464 | memcpy(buffer, name, l+1); | |
465 | ||
466 | pwd->pw_name = buffer; | |
467 | pwd->pw_uid = mapped; | |
468 | pwd->pw_gid = 65534; /* nobody */ | |
469 | pwd->pw_gecos = buffer; | |
470 | pwd->pw_passwd = (char*) "*"; /* locked */ | |
471 | pwd->pw_dir = (char*) "/"; | |
472 | pwd->pw_shell = (char*) "/sbin/nologin"; | |
473 | ||
474 | *errnop = 0; | |
475 | return NSS_STATUS_SUCCESS; | |
476 | ||
477 | not_found: | |
478 | *errnop = 0; | |
479 | return NSS_STATUS_NOTFOUND; | |
480 | ||
481 | fail: | |
482 | *errnop = -r; | |
483 | return NSS_STATUS_UNAVAIL; | |
484 | } | |
485 | ||
486 | enum nss_status _nss_mymachines_getpwuid_r( | |
487 | uid_t uid, | |
488 | struct passwd *pwd, | |
489 | char *buffer, size_t buflen, | |
490 | int *errnop) { | |
491 | ||
4afd3348 LP |
492 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
493 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; | |
494 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
c01ff965 LP |
495 | const char *machine, *object; |
496 | uint32_t mapped; | |
497 | int r; | |
498 | ||
0c5eb056 LP |
499 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
500 | ||
c077529b | 501 | if (!uid_is_valid(uid)) { |
c01ff965 LP |
502 | r = -EINVAL; |
503 | goto fail; | |
504 | } | |
505 | ||
506 | /* We consider all uids < 65536 host uids */ | |
507 | if (uid < 0x10000) | |
508 | goto not_found; | |
509 | ||
510 | r = sd_bus_open_system(&bus); | |
511 | if (r < 0) | |
512 | goto fail; | |
513 | ||
514 | r = sd_bus_call_method(bus, | |
515 | "org.freedesktop.machine1", | |
516 | "/org/freedesktop/machine1", | |
517 | "org.freedesktop.machine1.Manager", | |
518 | "MapToMachineUser", | |
519 | &error, | |
520 | &reply, | |
521 | "u", | |
522 | (uint32_t) uid); | |
523 | if (r < 0) { | |
524 | if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_USER_MAPPING)) | |
525 | goto not_found; | |
526 | ||
527 | goto fail; | |
528 | } | |
529 | ||
530 | r = sd_bus_message_read(reply, "sou", &machine, &object, &mapped); | |
531 | if (r < 0) | |
532 | goto fail; | |
533 | ||
534 | if (snprintf(buffer, buflen, "vu-%s-" UID_FMT, machine, (uid_t) mapped) >= (int) buflen) { | |
535 | *errnop = ENOMEM; | |
536 | return NSS_STATUS_TRYAGAIN; | |
537 | } | |
538 | ||
539 | pwd->pw_name = buffer; | |
540 | pwd->pw_uid = uid; | |
541 | pwd->pw_gid = 65534; /* nobody */ | |
542 | pwd->pw_gecos = buffer; | |
543 | pwd->pw_passwd = (char*) "*"; /* locked */ | |
544 | pwd->pw_dir = (char*) "/"; | |
545 | pwd->pw_shell = (char*) "/sbin/nologin"; | |
546 | ||
547 | *errnop = 0; | |
548 | return NSS_STATUS_SUCCESS; | |
549 | ||
550 | not_found: | |
551 | *errnop = 0; | |
552 | return NSS_STATUS_NOTFOUND; | |
553 | ||
554 | fail: | |
555 | *errnop = -r; | |
556 | return NSS_STATUS_UNAVAIL; | |
557 | } | |
558 | ||
559 | enum nss_status _nss_mymachines_getgrnam_r( | |
560 | const char *name, | |
561 | struct group *gr, | |
562 | char *buffer, size_t buflen, | |
563 | int *errnop) { | |
564 | ||
4afd3348 LP |
565 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
566 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; | |
567 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
c01ff965 LP |
568 | const char *p, *e, *machine; |
569 | uint32_t mapped; | |
570 | uid_t gid; | |
571 | size_t l; | |
572 | int r; | |
573 | ||
0c5eb056 LP |
574 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
575 | ||
c01ff965 LP |
576 | assert(name); |
577 | assert(gr); | |
578 | ||
579 | p = startswith(name, "vg-"); | |
580 | if (!p) | |
581 | goto not_found; | |
582 | ||
583 | e = strrchr(p, '-'); | |
584 | if (!e || e == p) | |
585 | goto not_found; | |
586 | ||
cb31827d ZJS |
587 | if (e - p > HOST_NAME_MAX - 1) /* -1 for the last dash */ |
588 | goto not_found; | |
589 | ||
c01ff965 LP |
590 | r = parse_gid(e + 1, &gid); |
591 | if (r < 0) | |
592 | goto not_found; | |
593 | ||
594 | machine = strndupa(p, e - p); | |
595 | if (!machine_name_is_valid(machine)) | |
596 | goto not_found; | |
597 | ||
598 | r = sd_bus_open_system(&bus); | |
599 | if (r < 0) | |
600 | goto fail; | |
601 | ||
602 | r = sd_bus_call_method(bus, | |
603 | "org.freedesktop.machine1", | |
604 | "/org/freedesktop/machine1", | |
605 | "org.freedesktop.machine1.Manager", | |
606 | "MapFromMachineGroup", | |
607 | &error, | |
608 | &reply, | |
609 | "su", | |
610 | machine, (uint32_t) gid); | |
611 | if (r < 0) { | |
612 | if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_GROUP_MAPPING)) | |
613 | goto not_found; | |
614 | ||
615 | goto fail; | |
616 | } | |
617 | ||
618 | r = sd_bus_message_read(reply, "u", &mapped); | |
619 | if (r < 0) | |
620 | goto fail; | |
621 | ||
622 | l = sizeof(char*) + strlen(name) + 1; | |
623 | if (buflen < l) { | |
624 | *errnop = ENOMEM; | |
625 | return NSS_STATUS_TRYAGAIN; | |
626 | } | |
627 | ||
628 | memzero(buffer, sizeof(char*)); | |
629 | strcpy(buffer + sizeof(char*), name); | |
630 | ||
631 | gr->gr_name = buffer + sizeof(char*); | |
632 | gr->gr_gid = gid; | |
633 | gr->gr_passwd = (char*) "*"; /* locked */ | |
634 | gr->gr_mem = (char**) buffer; | |
635 | ||
636 | *errnop = 0; | |
637 | return NSS_STATUS_SUCCESS; | |
638 | ||
639 | not_found: | |
640 | *errnop = 0; | |
641 | return NSS_STATUS_NOTFOUND; | |
642 | ||
643 | fail: | |
644 | *errnop = -r; | |
645 | return NSS_STATUS_UNAVAIL; | |
646 | } | |
647 | ||
648 | enum nss_status _nss_mymachines_getgrgid_r( | |
649 | gid_t gid, | |
650 | struct group *gr, | |
651 | char *buffer, size_t buflen, | |
652 | int *errnop) { | |
653 | ||
4afd3348 LP |
654 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
655 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL; | |
656 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
c01ff965 LP |
657 | const char *machine, *object; |
658 | uint32_t mapped; | |
659 | int r; | |
660 | ||
0c5eb056 LP |
661 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
662 | ||
c077529b | 663 | if (!gid_is_valid(gid)) { |
c01ff965 LP |
664 | r = -EINVAL; |
665 | goto fail; | |
666 | } | |
667 | ||
668 | /* We consider all gids < 65536 host gids */ | |
669 | if (gid < 0x10000) | |
670 | goto not_found; | |
671 | ||
672 | r = sd_bus_open_system(&bus); | |
673 | if (r < 0) | |
674 | goto fail; | |
675 | ||
676 | r = sd_bus_call_method(bus, | |
677 | "org.freedesktop.machine1", | |
678 | "/org/freedesktop/machine1", | |
679 | "org.freedesktop.machine1.Manager", | |
680 | "MapToMachineGroup", | |
681 | &error, | |
682 | &reply, | |
683 | "u", | |
684 | (uint32_t) gid); | |
685 | if (r < 0) { | |
686 | if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_GROUP_MAPPING)) | |
687 | goto not_found; | |
688 | ||
689 | goto fail; | |
690 | } | |
691 | ||
692 | r = sd_bus_message_read(reply, "sou", &machine, &object, &mapped); | |
693 | if (r < 0) | |
694 | goto fail; | |
695 | ||
696 | if (buflen < sizeof(char*) + 1) { | |
697 | *errnop = ENOMEM; | |
698 | return NSS_STATUS_TRYAGAIN; | |
699 | } | |
700 | ||
701 | memzero(buffer, sizeof(char*)); | |
702 | if (snprintf(buffer + sizeof(char*), buflen - sizeof(char*), "vg-%s-" GID_FMT, machine, (gid_t) mapped) >= (int) buflen) { | |
703 | *errnop = ENOMEM; | |
704 | return NSS_STATUS_TRYAGAIN; | |
705 | } | |
706 | ||
707 | gr->gr_name = buffer + sizeof(char*); | |
708 | gr->gr_gid = gid; | |
709 | gr->gr_passwd = (char*) "*"; /* locked */ | |
710 | gr->gr_mem = (char**) buffer; | |
711 | ||
712 | *errnop = 0; | |
713 | return NSS_STATUS_SUCCESS; | |
714 | ||
715 | not_found: | |
716 | *errnop = 0; | |
717 | return NSS_STATUS_NOTFOUND; | |
718 | ||
719 | fail: | |
720 | *errnop = -r; | |
721 | return NSS_STATUS_UNAVAIL; | |
722 | } |