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1e2e27fd | 1 | /* Copyright (C) 1996,1997,1998,1999,2001,2002,2003 Free Software Foundation, Inc. |
6259ec0d UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
6259ec0d UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
6259ec0d | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
6259ec0d UD |
19 | |
20 | #include <nss.h> | |
21 | #include <errno.h> | |
22 | #include <ctype.h> | |
3996f34b | 23 | #include <fcntl.h> |
6259ec0d UD |
24 | #include <netdb.h> |
25 | #include <shadow.h> | |
26 | #include <string.h> | |
5107cf1d | 27 | #include <bits/libc-lock.h> |
1e2e27fd | 28 | #include <rpc/types.h> |
6259ec0d | 29 | #include <rpcsvc/ypclnt.h> |
26dee9c4 UD |
30 | #include <nsswitch.h> |
31 | ||
32 | #include "netgroup.h" | |
26dee9c4 | 33 | |
fc9f33e3 | 34 | static service_user *ni; |
1e2e27fd UD |
35 | static enum nss_status (*nss_setspent) (int stayopen); |
36 | static enum nss_status (*nss_getspnam_r) (const char *name, struct spwd * sp, | |
37 | char *buffer, size_t buflen, | |
38 | int *errnop); | |
39 | static enum nss_status (*nss_getspent_r) (struct spwd * sp, char *buffer, | |
40 | size_t buflen, int *errnop); | |
41 | static enum nss_status (*nss_endspent) (void); | |
6259ec0d | 42 | |
7e3be507 UD |
43 | /* Get the declaration of the parser function. */ |
44 | #define ENTNAME spent | |
45 | #define STRUCTURE spwd | |
46 | #define EXTERN_PARSER | |
cc3fa755 | 47 | #include <nss/nss_files/files-parse.c> |
7e3be507 | 48 | |
6259ec0d UD |
49 | /* Structure for remembering -@netgroup and -user members ... */ |
50 | #define BLACKLIST_INITIAL_SIZE 512 | |
51 | #define BLACKLIST_INCREMENT 256 | |
52 | struct blacklist_t | |
1e2e27fd UD |
53 | { |
54 | char *data; | |
55 | int current; | |
56 | int size; | |
57 | }; | |
6259ec0d UD |
58 | |
59 | struct ent_t | |
1e2e27fd UD |
60 | { |
61 | bool_t netgroup; | |
62 | bool_t files; | |
63 | bool_t first; | |
64 | FILE *stream; | |
65 | struct blacklist_t blacklist; | |
66 | struct spwd pwd; | |
67 | struct __netgrent netgrdata; | |
68 | }; | |
6259ec0d UD |
69 | typedef struct ent_t ent_t; |
70 | ||
1e2e27fd | 71 | static ent_t ext_ent = {0, TRUE, 0, NULL, {NULL, 0, 0}, |
6259ec0d UD |
72 | {NULL, NULL, 0, 0, 0, 0, 0, 0, 0}}; |
73 | ||
74 | /* Protect global state against multiple changers. */ | |
75 | __libc_lock_define_initialized (static, lock) | |
76 | ||
77 | /* Prototypes for local functions. */ | |
78 | static void blacklist_store_name (const char *, ent_t *); | |
79 | static int in_blacklist (const char *, int, ent_t *); | |
2d7da676 | 80 | |
1e2e27fd UD |
81 | /* Initialize the NSS interface/functions. The calling function must |
82 | hold the lock. */ | |
83 | static void | |
84 | init_nss_interface (void) | |
85 | { | |
86 | if (__nss_database_lookup ("shadow_compat", "passwd_compat", | |
87 | "nis", &ni) >= 0) | |
88 | { | |
89 | nss_setspent = __nss_lookup_function (ni, "setspent"); | |
90 | nss_getspnam_r = __nss_lookup_function (ni, "getspnam_r"); | |
91 | nss_getspent_r = __nss_lookup_function (ni, "getspent_r"); | |
92 | nss_endspent = __nss_lookup_function (ni, "endspent"); | |
93 | } | |
94 | } | |
95 | ||
6259ec0d UD |
96 | static void |
97 | give_spwd_free (struct spwd *pwd) | |
98 | { | |
99 | if (pwd->sp_namp != NULL) | |
100 | free (pwd->sp_namp); | |
101 | if (pwd->sp_pwdp != NULL) | |
102 | free (pwd->sp_pwdp); | |
103 | ||
104 | memset (pwd, '\0', sizeof (struct spwd)); | |
b378b9f9 UD |
105 | pwd->sp_warn = -1; |
106 | pwd->sp_inact = -1; | |
107 | pwd->sp_expire = -1; | |
108 | pwd->sp_flag = ~0ul; | |
6259ec0d UD |
109 | } |
110 | ||
111 | static int | |
112 | spwd_need_buflen (struct spwd *pwd) | |
113 | { | |
114 | int len = 0; | |
115 | ||
116 | if (pwd->sp_pwdp != NULL) | |
117 | len += strlen (pwd->sp_pwdp) + 1; | |
118 | ||
119 | return len; | |
120 | } | |
121 | ||
122 | static void | |
123 | copy_spwd_changes (struct spwd *dest, struct spwd *src, | |
124 | char *buffer, size_t buflen) | |
125 | { | |
126 | if (src->sp_pwdp != NULL && strlen (src->sp_pwdp)) | |
127 | { | |
128 | if (buffer == NULL) | |
129 | dest->sp_pwdp = strdup (src->sp_pwdp); | |
130 | else if (dest->sp_pwdp && | |
131 | strlen (dest->sp_pwdp) >= strlen (src->sp_pwdp)) | |
132 | strcpy (dest->sp_pwdp, src->sp_pwdp); | |
133 | else | |
134 | { | |
135 | dest->sp_pwdp = buffer; | |
136 | strcpy (dest->sp_pwdp, src->sp_pwdp); | |
137 | buffer += strlen (dest->sp_pwdp) + 1; | |
138 | buflen = buflen - (strlen (dest->sp_pwdp) + 1); | |
139 | } | |
140 | } | |
141 | if (src->sp_lstchg != 0) | |
142 | dest->sp_lstchg = src->sp_lstchg; | |
143 | if (src->sp_min != 0) | |
144 | dest->sp_min = src->sp_min; | |
145 | if (src->sp_max != 0) | |
146 | dest->sp_max = src->sp_max; | |
b378b9f9 | 147 | if (src->sp_warn != -1) |
6259ec0d | 148 | dest->sp_warn = src->sp_warn; |
b378b9f9 | 149 | if (src->sp_inact != -1) |
6259ec0d | 150 | dest->sp_inact = src->sp_inact; |
b378b9f9 | 151 | if (src->sp_expire != -1) |
6259ec0d | 152 | dest->sp_expire = src->sp_expire; |
b378b9f9 | 153 | if (src->sp_flag != ~0ul) |
6259ec0d UD |
154 | dest->sp_flag = src->sp_flag; |
155 | } | |
156 | ||
157 | static enum nss_status | |
1e2e27fd | 158 | internal_setspent (ent_t *ent, int stayopen) |
6259ec0d UD |
159 | { |
160 | enum nss_status status = NSS_STATUS_SUCCESS; | |
161 | ||
1e2e27fd UD |
162 | ent->first = ent->netgroup = 0; |
163 | ent->files = TRUE; | |
6259ec0d | 164 | |
26dee9c4 UD |
165 | /* If something was left over free it. */ |
166 | if (ent->netgroup) | |
167 | __internal_endnetgrent (&ent->netgrdata); | |
c131718c | 168 | |
6259ec0d | 169 | if (ent->blacklist.data != NULL) |
bd355af0 UD |
170 | { |
171 | ent->blacklist.current = 1; | |
172 | ent->blacklist.data[0] = '|'; | |
173 | ent->blacklist.data[1] = '\0'; | |
174 | } | |
175 | else | |
176 | ent->blacklist.current = 0; | |
6259ec0d UD |
177 | |
178 | if (ent->stream == NULL) | |
179 | { | |
180 | ent->stream = fopen ("/etc/shadow", "r"); | |
181 | ||
182 | if (ent->stream == NULL) | |
183 | status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL; | |
3996f34b UD |
184 | else |
185 | { | |
186 | /* We have to make sure the file is `closed on exec'. */ | |
187 | int result, flags; | |
188 | ||
189 | result = flags = fcntl (fileno (ent->stream), F_GETFD, 0); | |
190 | if (result >= 0) | |
191 | { | |
192 | flags |= FD_CLOEXEC; | |
193 | result = fcntl (fileno (ent->stream), F_SETFD, flags); | |
194 | } | |
195 | if (result < 0) | |
196 | { | |
197 | /* Something went wrong. Close the stream and return a | |
1e2e27fd | 198 | failure. */ |
3996f34b UD |
199 | fclose (ent->stream); |
200 | ent->stream = NULL; | |
201 | status = NSS_STATUS_UNAVAIL; | |
202 | } | |
203 | } | |
6259ec0d UD |
204 | } |
205 | else | |
206 | rewind (ent->stream); | |
207 | ||
208 | give_spwd_free (&ent->pwd); | |
209 | ||
1e2e27fd UD |
210 | if (status == NSS_STATUS_SUCCESS && nss_setspent) |
211 | return nss_setspent (stayopen); | |
212 | ||
6259ec0d UD |
213 | return status; |
214 | } | |
215 | ||
216 | ||
217 | enum nss_status | |
51eecc4a | 218 | _nss_compat_setspent (int stayopen) |
6259ec0d UD |
219 | { |
220 | enum nss_status result; | |
221 | ||
222 | __libc_lock_lock (lock); | |
223 | ||
26dee9c4 | 224 | if (ni == NULL) |
1e2e27fd | 225 | init_nss_interface (); |
c131718c | 226 | |
1e2e27fd | 227 | result = internal_setspent (&ext_ent, stayopen); |
6259ec0d UD |
228 | |
229 | __libc_lock_unlock (lock); | |
230 | ||
231 | return result; | |
232 | } | |
233 | ||
234 | ||
235 | static enum nss_status | |
236 | internal_endspent (ent_t *ent) | |
237 | { | |
1e2e27fd UD |
238 | if (nss_endspent) |
239 | nss_endspent (); | |
240 | ||
6259ec0d UD |
241 | if (ent->stream != NULL) |
242 | { | |
243 | fclose (ent->stream); | |
244 | ent->stream = NULL; | |
245 | } | |
246 | ||
26dee9c4 UD |
247 | if (ent->netgroup) |
248 | __internal_endnetgrent (&ent->netgrdata); | |
249 | ||
1e2e27fd UD |
250 | ent->first = ent->netgroup = FALSE; |
251 | ent->files = TRUE; | |
c131718c | 252 | |
6259ec0d | 253 | if (ent->blacklist.data != NULL) |
bd355af0 UD |
254 | { |
255 | ent->blacklist.current = 1; | |
256 | ent->blacklist.data[0] = '|'; | |
257 | ent->blacklist.data[1] = '\0'; | |
258 | } | |
259 | else | |
260 | ent->blacklist.current = 0; | |
c131718c | 261 | |
6259ec0d UD |
262 | give_spwd_free (&ent->pwd); |
263 | ||
264 | return NSS_STATUS_SUCCESS; | |
265 | } | |
266 | ||
267 | enum nss_status | |
268 | _nss_compat_endspent (void) | |
269 | { | |
270 | enum nss_status result; | |
271 | ||
272 | __libc_lock_lock (lock); | |
273 | ||
274 | result = internal_endspent (&ext_ent); | |
275 | ||
276 | __libc_lock_unlock (lock); | |
277 | ||
278 | return result; | |
279 | } | |
280 | ||
281 | ||
282 | static enum nss_status | |
1e2e27fd UD |
283 | getspent_next_nss_netgr (const char *name, struct spwd *result, ent_t *ent, |
284 | char *group, char *buffer, size_t buflen, | |
285 | int *errnop) | |
6259ec0d | 286 | { |
1e2e27fd | 287 | char *curdomain, *host, *user, *domain, *p2; |
6259ec0d UD |
288 | size_t p2len; |
289 | ||
1e2e27fd UD |
290 | if (!nss_getspnam_r) |
291 | return NSS_STATUS_UNAVAIL; | |
292 | ||
293 | if (yp_get_default_domain (&curdomain) != YPERR_SUCCESS) | |
6259ec0d | 294 | { |
1e2e27fd UD |
295 | ent->netgroup = FALSE; |
296 | ent->first = FALSE; | |
6259ec0d UD |
297 | give_spwd_free (&ent->pwd); |
298 | return NSS_STATUS_UNAVAIL; | |
299 | } | |
300 | ||
301 | if (ent->first == TRUE) | |
302 | { | |
1e2e27fd | 303 | memset (&ent->netgrdata, 0, sizeof (struct __netgrent)); |
26dee9c4 | 304 | __internal_setnetgrent (group, &ent->netgrdata); |
6259ec0d UD |
305 | ent->first = FALSE; |
306 | } | |
307 | ||
308 | while (1) | |
309 | { | |
60c96635 | 310 | char *saved_cursor; |
1e2e27fd | 311 | enum nss_status status; |
60c96635 UD |
312 | |
313 | saved_cursor = ent->netgrdata.cursor; | |
26dee9c4 | 314 | status = __internal_getnetgrent_r (&host, &user, &domain, |
d71b808a UD |
315 | &ent->netgrdata, buffer, buflen, |
316 | errnop); | |
26dee9c4 | 317 | if (status != 1) |
6259ec0d | 318 | { |
26dee9c4 | 319 | __internal_endnetgrent (&ent->netgrdata); |
1e2e27fd | 320 | ent->netgroup = FALSE; |
6259ec0d UD |
321 | give_spwd_free (&ent->pwd); |
322 | return NSS_STATUS_RETURN; | |
323 | } | |
3996f34b | 324 | |
6259ec0d UD |
325 | if (user == NULL || user[0] == '-') |
326 | continue; | |
3996f34b | 327 | |
1e2e27fd | 328 | if (domain != NULL && strcmp (curdomain, domain) != 0) |
6259ec0d UD |
329 | continue; |
330 | ||
cc3fa755 UD |
331 | /* If name != NULL, we are called from getpwnam */ |
332 | if (name != NULL) | |
333 | if (strcmp (user, name) != 0) | |
334 | continue; | |
335 | ||
6259ec0d UD |
336 | p2len = spwd_need_buflen (&ent->pwd); |
337 | if (p2len > buflen) | |
338 | { | |
d71b808a | 339 | *errnop = ERANGE; |
6259ec0d UD |
340 | return NSS_STATUS_TRYAGAIN; |
341 | } | |
342 | p2 = buffer + (buflen - p2len); | |
343 | buflen -= p2len; | |
26dee9c4 | 344 | |
1e2e27fd UD |
345 | if (nss_getspnam_r (user, result, buffer, buflen, errnop) != |
346 | NSS_STATUS_SUCCESS) | |
347 | continue; | |
cc3fa755 | 348 | |
1e2e27fd | 349 | if (!in_blacklist (result->sp_namp, strlen (result->sp_namp), ent)) |
60c96635 | 350 | { |
1e2e27fd UD |
351 | /* Store the User in the blacklist for possible the "+" at the |
352 | end of /etc/passwd */ | |
cc3fa755 UD |
353 | blacklist_store_name (result->sp_namp, ent); |
354 | copy_spwd_changes (result, &ent->pwd, p2, p2len); | |
1e2e27fd | 355 | break; |
60c96635 | 356 | } |
26dee9c4 | 357 | } |
c131718c | 358 | |
26dee9c4 UD |
359 | return NSS_STATUS_SUCCESS; |
360 | } | |
361 | ||
362 | ||
6259ec0d | 363 | static enum nss_status |
1e2e27fd | 364 | getspent_next_nss (struct spwd *result, ent_t *ent, |
d71b808a | 365 | char *buffer, size_t buflen, int *errnop) |
6259ec0d | 366 | { |
1e2e27fd UD |
367 | enum nss_status status; |
368 | char *p2; | |
6259ec0d UD |
369 | size_t p2len; |
370 | ||
1e2e27fd UD |
371 | if (!nss_getspent_r) |
372 | return NSS_STATUS_UNAVAIL; | |
6259ec0d UD |
373 | |
374 | p2len = spwd_need_buflen (&ent->pwd); | |
375 | if (p2len > buflen) | |
376 | { | |
d71b808a | 377 | *errnop = ERANGE; |
6259ec0d UD |
378 | return NSS_STATUS_TRYAGAIN; |
379 | } | |
380 | p2 = buffer + (buflen - p2len); | |
381 | buflen -= p2len; | |
382 | do | |
383 | { | |
1e2e27fd UD |
384 | if ((status = nss_getspent_r (result, buffer, buflen, errnop)) != |
385 | NSS_STATUS_SUCCESS) | |
386 | return status; | |
6259ec0d | 387 | } |
1e2e27fd | 388 | while (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent)); |
6259ec0d UD |
389 | |
390 | copy_spwd_changes (result, &ent->pwd, p2, p2len); | |
391 | ||
26dee9c4 | 392 | return NSS_STATUS_SUCCESS; |
6259ec0d UD |
393 | } |
394 | ||
26dee9c4 UD |
395 | /* This function handle the +user entrys in /etc/shadow */ |
396 | static enum nss_status | |
1e2e27fd UD |
397 | getspnam_plususer (const char *name, struct spwd *result, ent_t *ent, |
398 | char *buffer, size_t buflen, int *errnop) | |
26dee9c4 | 399 | { |
26dee9c4 | 400 | struct spwd pwd; |
26dee9c4 UD |
401 | char *p; |
402 | size_t plen; | |
c131718c | 403 | |
1e2e27fd UD |
404 | if (!nss_getspnam_r) |
405 | return NSS_STATUS_UNAVAIL; | |
406 | ||
26dee9c4 | 407 | memset (&pwd, '\0', sizeof (struct spwd)); |
b378b9f9 UD |
408 | pwd.sp_warn = -1; |
409 | pwd.sp_inact = -1; | |
410 | pwd.sp_expire = -1; | |
411 | pwd.sp_flag = ~0ul; | |
c131718c | 412 | |
26dee9c4 | 413 | copy_spwd_changes (&pwd, result, NULL, 0); |
c131718c | 414 | |
26dee9c4 UD |
415 | plen = spwd_need_buflen (&pwd); |
416 | if (plen > buflen) | |
417 | { | |
d71b808a | 418 | *errnop = ERANGE; |
26dee9c4 UD |
419 | return NSS_STATUS_TRYAGAIN; |
420 | } | |
421 | p = buffer + (buflen - plen); | |
422 | buflen -= plen; | |
c131718c | 423 | |
1e2e27fd UD |
424 | if (nss_getspnam_r (name, result, buffer, buflen, errnop) != |
425 | NSS_STATUS_SUCCESS) | |
426 | return NSS_STATUS_NOTFOUND; | |
6591c335 | 427 | |
1e2e27fd UD |
428 | if (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent)) |
429 | return NSS_STATUS_NOTFOUND; | |
c131718c | 430 | |
1e2e27fd UD |
431 | copy_spwd_changes (result, &pwd, p, plen); |
432 | give_spwd_free (&pwd); | |
433 | /* We found the entry. */ | |
26dee9c4 UD |
434 | return NSS_STATUS_RETURN; |
435 | } | |
6259ec0d UD |
436 | |
437 | static enum nss_status | |
438 | getspent_next_file (struct spwd *result, ent_t *ent, | |
d71b808a | 439 | char *buffer, size_t buflen, int *errnop) |
6259ec0d | 440 | { |
7e3be507 | 441 | struct parser_data *data = (void *) buffer; |
6259ec0d UD |
442 | while (1) |
443 | { | |
60c96635 UD |
444 | fpos_t pos; |
445 | int parse_res = 0; | |
c131718c | 446 | char *p; |
6259ec0d UD |
447 | |
448 | do | |
449 | { | |
60c96635 | 450 | fgetpos (ent->stream, &pos); |
af69217f | 451 | buffer[buflen - 1] = '\xff'; |
6259ec0d | 452 | p = fgets (buffer, buflen, ent->stream); |
af69217f | 453 | if (p == NULL && feof (ent->stream)) |
34816665 UD |
454 | return NSS_STATUS_NOTFOUND; |
455 | ||
af69217f UD |
456 | if (p == NULL || buffer[buflen - 1] != '\xff') |
457 | { | |
458 | fsetpos (ent->stream, &pos); | |
459 | *errnop = ERANGE; | |
460 | return NSS_STATUS_TRYAGAIN; | |
461 | } | |
6259ec0d UD |
462 | |
463 | /* Skip leading blanks. */ | |
464 | while (isspace (*p)) | |
465 | ++p; | |
466 | } | |
c131718c | 467 | while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */ |
1e2e27fd UD |
468 | /* Parse the line. If it is invalid, loop to |
469 | get the next line of the file to parse. */ | |
60c96635 | 470 | || !(parse_res = _nss_files_parse_spent (p, result, data, |
d71b808a | 471 | buflen, errnop))); |
6259ec0d | 472 | |
60c96635 | 473 | if (parse_res == -1) |
1e2e27fd UD |
474 | { |
475 | /* The parser ran out of space. */ | |
476 | fsetpos (ent->stream, &pos); | |
477 | *errnop = ERANGE; | |
478 | return NSS_STATUS_TRYAGAIN; | |
479 | } | |
3996f34b | 480 | |
6259ec0d UD |
481 | if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-') |
482 | /* This is a real entry. */ | |
483 | break; | |
484 | ||
485 | /* -@netgroup */ | |
486 | if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@' | |
487 | && result->sp_namp[2] != '\0') | |
488 | { | |
d71b808a | 489 | /* XXX Do not use fixed length buffers. */ |
1e2e27fd | 490 | char buf2[1024]; |
51eecc4a | 491 | char *user, *host, *domain; |
1e2e27fd | 492 | struct __netgrent netgrdata; |
c131718c | 493 | |
1e2e27fd UD |
494 | bzero (&netgrdata, sizeof (struct __netgrent)); |
495 | __internal_setnetgrent (&result->sp_namp[2], &netgrdata); | |
c131718c | 496 | while (__internal_getnetgrent_r (&host, &user, &domain, |
d71b808a UD |
497 | &netgrdata, buf2, sizeof (buf2), |
498 | errnop)) | |
6259ec0d UD |
499 | { |
500 | if (user != NULL && user[0] != '-') | |
501 | blacklist_store_name (user, ent); | |
502 | } | |
c131718c | 503 | __internal_endnetgrent (&netgrdata); |
6259ec0d UD |
504 | continue; |
505 | } | |
506 | ||
507 | /* +@netgroup */ | |
508 | if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@' | |
509 | && result->sp_namp[2] != '\0') | |
510 | { | |
511 | int status; | |
512 | ||
513 | ent->netgroup = TRUE; | |
514 | ent->first = TRUE; | |
515 | copy_spwd_changes (&ent->pwd, result, NULL, 0); | |
516 | ||
1e2e27fd UD |
517 | status = getspent_next_nss_netgr (NULL, result, ent, |
518 | &result->sp_namp[2], | |
519 | buffer, buflen, errnop); | |
6259ec0d UD |
520 | if (status == NSS_STATUS_RETURN) |
521 | continue; | |
522 | else | |
523 | return status; | |
524 | } | |
525 | ||
526 | /* -user */ | |
527 | if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0' | |
528 | && result->sp_namp[1] != '@') | |
529 | { | |
530 | blacklist_store_name (&result->sp_namp[1], ent); | |
531 | continue; | |
532 | } | |
533 | ||
534 | /* +user */ | |
535 | if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0' | |
536 | && result->sp_namp[1] != '@') | |
537 | { | |
1e2e27fd | 538 | enum nss_status status; |
c131718c | 539 | |
cc3fa755 UD |
540 | /* Store the User in the blacklist for the "+" at the end of |
541 | /etc/passwd */ | |
542 | blacklist_store_name (&result->sp_namp[1], ent); | |
1e2e27fd UD |
543 | status = getspnam_plususer (&result->sp_namp[1], result, ent, |
544 | buffer, buflen, errnop); | |
545 | ||
546 | if (status == NSS_STATUS_SUCCESS) /* We found the entry. */ | |
547 | break; | |
548 | else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry */ | |
549 | || status == NSS_STATUS_NOTFOUND) /* entry doesn't exist */ | |
550 | continue; | |
551 | else | |
552 | { | |
553 | if (status == NSS_STATUS_TRYAGAIN) | |
554 | { | |
555 | fsetpos (ent->stream, &pos); | |
556 | *errnop = ERANGE; | |
557 | } | |
558 | return status; | |
559 | } | |
6259ec0d UD |
560 | } |
561 | ||
562 | /* +:... */ | |
563 | if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0') | |
564 | { | |
1e2e27fd | 565 | ent->files = FALSE; |
6259ec0d UD |
566 | ent->first = TRUE; |
567 | copy_spwd_changes (&ent->pwd, result, NULL, 0); | |
568 | ||
1e2e27fd | 569 | return getspent_next_nss (result, ent, buffer, buflen, errnop); |
6259ec0d UD |
570 | } |
571 | } | |
572 | ||
573 | return NSS_STATUS_SUCCESS; | |
574 | } | |
575 | ||
576 | ||
577 | static enum nss_status | |
578 | internal_getspent_r (struct spwd *pw, ent_t *ent, | |
d71b808a | 579 | char *buffer, size_t buflen, int *errnop) |
6259ec0d UD |
580 | { |
581 | if (ent->netgroup) | |
582 | { | |
1e2e27fd | 583 | enum nss_status status; |
6259ec0d UD |
584 | |
585 | /* We are searching members in a netgroup */ | |
586 | /* Since this is not the first call, we don't need the group name */ | |
1e2e27fd UD |
587 | status = getspent_next_nss_netgr (NULL, pw, ent, NULL, buffer, |
588 | buflen, errnop); | |
589 | ||
6259ec0d | 590 | if (status == NSS_STATUS_RETURN) |
d71b808a | 591 | return getspent_next_file (pw, ent, buffer, buflen, errnop); |
6259ec0d UD |
592 | else |
593 | return status; | |
594 | } | |
1e2e27fd UD |
595 | else if (ent->files) |
596 | return getspent_next_file (pw, ent, buffer, buflen, errnop); | |
6259ec0d | 597 | else |
1e2e27fd | 598 | return getspent_next_nss (pw, ent, buffer, buflen, errnop); |
6259ec0d UD |
599 | } |
600 | ||
601 | enum nss_status | |
d71b808a UD |
602 | _nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen, |
603 | int *errnop) | |
6259ec0d | 604 | { |
1e2e27fd | 605 | enum nss_status result = NSS_STATUS_SUCCESS; |
6259ec0d UD |
606 | |
607 | __libc_lock_lock (lock); | |
608 | ||
1e2e27fd | 609 | /* Be prepared that the setpwent function was not called before. */ |
26dee9c4 | 610 | if (ni == NULL) |
1e2e27fd | 611 | init_nss_interface (); |
c131718c | 612 | |
6259ec0d | 613 | if (ext_ent.stream == NULL) |
1e2e27fd | 614 | result = internal_setspent (&ext_ent, 1); |
6259ec0d | 615 | |
1e2e27fd UD |
616 | if (result == NSS_STATUS_SUCCESS) |
617 | result = internal_getspent_r (pwd, &ext_ent, buffer, buflen, errnop); | |
6259ec0d UD |
618 | |
619 | __libc_lock_unlock (lock); | |
620 | ||
1e2e27fd | 621 | return result; |
6259ec0d UD |
622 | } |
623 | ||
cc3fa755 UD |
624 | /* Searches in /etc/passwd and the NIS/NIS+ map for a special user */ |
625 | static enum nss_status | |
626 | internal_getspnam_r (const char *name, struct spwd *result, ent_t *ent, | |
d71b808a | 627 | char *buffer, size_t buflen, int *errnop) |
cc3fa755 UD |
628 | { |
629 | struct parser_data *data = (void *) buffer; | |
630 | ||
631 | while (1) | |
632 | { | |
633 | fpos_t pos; | |
634 | char *p; | |
635 | int parse_res; | |
636 | ||
637 | do | |
638 | { | |
639 | fgetpos (ent->stream, &pos); | |
af69217f | 640 | buffer[buflen - 1] = '\xff'; |
cc3fa755 | 641 | p = fgets (buffer, buflen, ent->stream); |
af69217f | 642 | if (p == NULL && feof (ent->stream)) |
34816665 UD |
643 | return NSS_STATUS_NOTFOUND; |
644 | ||
af69217f UD |
645 | if (p == NULL || buffer[buflen - 1] != '\xff') |
646 | { | |
647 | fsetpos (ent->stream, &pos); | |
648 | *errnop = ERANGE; | |
649 | return NSS_STATUS_TRYAGAIN; | |
650 | } | |
cc3fa755 UD |
651 | |
652 | /* Skip leading blanks. */ | |
653 | while (isspace (*p)) | |
654 | ++p; | |
655 | } | |
1e2e27fd | 656 | while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */ |
cc3fa755 | 657 | /* Parse the line. If it is invalid, loop to |
1e2e27fd | 658 | get the next line of the file to parse. */ |
d71b808a UD |
659 | !(parse_res = _nss_files_parse_spent (p, result, data, buflen, |
660 | errnop))); | |
cc3fa755 UD |
661 | |
662 | if (parse_res == -1) | |
663 | { | |
664 | /* The parser ran out of space. */ | |
665 | fsetpos (ent->stream, &pos); | |
d71b808a | 666 | *errnop = ERANGE; |
cc3fa755 UD |
667 | return NSS_STATUS_TRYAGAIN; |
668 | } | |
669 | ||
670 | /* This is a real entry. */ | |
671 | if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-') | |
672 | { | |
673 | if (strcmp (result->sp_namp, name) == 0) | |
674 | return NSS_STATUS_SUCCESS; | |
675 | else | |
676 | continue; | |
677 | } | |
678 | ||
679 | /* -@netgroup */ | |
1e2e27fd UD |
680 | /* If the loaded NSS module does not support this service, add |
681 | all users from a +@netgroup entry to the blacklist, too. */ | |
cc3fa755 UD |
682 | if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@' |
683 | && result->sp_namp[2] != '\0') | |
684 | { | |
d71b808a | 685 | /* XXX Do not use fixed length buffers. */ |
cc3fa755 UD |
686 | char buf2[1024]; |
687 | char *user, *host, *domain; | |
688 | struct __netgrent netgrdata; | |
689 | ||
690 | bzero (&netgrdata, sizeof (struct __netgrent)); | |
691 | __internal_setnetgrent (&result->sp_namp[2], &netgrdata); | |
d71b808a UD |
692 | while (__internal_getnetgrent_r (&host, &user, &domain, &netgrdata, |
693 | buf2, sizeof (buf2), errnop)) | |
cc3fa755 UD |
694 | { |
695 | if (user != NULL && user[0] != '-') | |
696 | if (strcmp (user, name) == 0) | |
34816665 | 697 | return NSS_STATUS_NOTFOUND; |
cc3fa755 UD |
698 | } |
699 | __internal_endnetgrent (&netgrdata); | |
700 | continue; | |
701 | } | |
702 | ||
703 | /* +@netgroup */ | |
704 | if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@' | |
705 | && result->sp_namp[2] != '\0') | |
706 | { | |
d71b808a | 707 | char *buf = strdupa (&result->sp_namp[2]); |
cc3fa755 UD |
708 | int status; |
709 | ||
cc3fa755 UD |
710 | ent->netgroup = TRUE; |
711 | ent->first = TRUE; | |
712 | copy_spwd_changes (&ent->pwd, result, NULL, 0); | |
713 | ||
714 | do | |
715 | { | |
1e2e27fd UD |
716 | status = getspent_next_nss_netgr (name, result, ent, buf, |
717 | buffer, buflen, errnop); | |
cc3fa755 UD |
718 | if (status == NSS_STATUS_RETURN) |
719 | continue; | |
720 | ||
d71b808a UD |
721 | if (status == NSS_STATUS_SUCCESS |
722 | && strcmp (result->sp_namp, name) == 0) | |
cc3fa755 | 723 | return NSS_STATUS_SUCCESS; |
1e2e27fd UD |
724 | } |
725 | while (status == NSS_STATUS_SUCCESS); | |
cc3fa755 UD |
726 | continue; |
727 | } | |
728 | ||
729 | /* -user */ | |
730 | if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0' | |
731 | && result->sp_namp[1] != '@') | |
732 | { | |
733 | if (strcmp (&result->sp_namp[1], name) == 0) | |
34816665 | 734 | return NSS_STATUS_NOTFOUND; |
cc3fa755 UD |
735 | else |
736 | continue; | |
737 | } | |
738 | ||
739 | /* +user */ | |
740 | if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0' | |
741 | && result->sp_namp[1] != '@') | |
742 | { | |
743 | if (strcmp (name, &result->sp_namp[1]) == 0) | |
744 | { | |
745 | enum nss_status status; | |
746 | ||
1e2e27fd UD |
747 | status = getspnam_plususer (name, result, ent, |
748 | buffer, buflen, errnop); | |
749 | ||
cc3fa755 | 750 | if (status == NSS_STATUS_RETURN) |
34816665 UD |
751 | /* We couldn't parse the entry */ |
752 | return NSS_STATUS_NOTFOUND; | |
cc3fa755 UD |
753 | else |
754 | return status; | |
755 | } | |
756 | } | |
757 | ||
758 | /* +:... */ | |
759 | if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0') | |
760 | { | |
761 | enum nss_status status; | |
762 | ||
1e2e27fd UD |
763 | status = getspnam_plususer (name, result, ent, |
764 | buffer, buflen, errnop); | |
765 | ||
766 | if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */ | |
34816665 | 767 | return NSS_STATUS_NOTFOUND; |
cc3fa755 UD |
768 | else |
769 | return status; | |
770 | } | |
771 | } | |
772 | return NSS_STATUS_SUCCESS; | |
773 | } | |
6259ec0d UD |
774 | |
775 | enum nss_status | |
776 | _nss_compat_getspnam_r (const char *name, struct spwd *pwd, | |
d71b808a | 777 | char *buffer, size_t buflen, int *errnop) |
6259ec0d | 778 | { |
1e2e27fd UD |
779 | enum nss_status result; |
780 | ent_t ent = {0, TRUE, 0, NULL, {NULL, 0, 0}, | |
6259ec0d | 781 | {NULL, NULL, 0, 0, 0, 0, 0, 0, 0}}; |
6259ec0d UD |
782 | |
783 | if (name[0] == '-' || name[0] == '+') | |
34816665 | 784 | return NSS_STATUS_NOTFOUND; |
6259ec0d | 785 | |
1e2e27fd UD |
786 | __libc_lock_lock (lock); |
787 | ||
26dee9c4 | 788 | if (ni == NULL) |
1e2e27fd UD |
789 | init_nss_interface (); |
790 | ||
791 | __libc_lock_unlock (lock); | |
c131718c | 792 | |
1e2e27fd | 793 | result = internal_setspent (&ent, 0); |
6259ec0d | 794 | |
1e2e27fd UD |
795 | if (result != NSS_STATUS_SUCCESS) |
796 | return result; | |
797 | ||
798 | result = internal_getspnam_r (name, pwd, &ent, buffer, buflen, errnop); | |
6259ec0d UD |
799 | |
800 | internal_endspent (&ent); | |
cc3fa755 | 801 | |
1e2e27fd | 802 | return result; |
6259ec0d UD |
803 | } |
804 | ||
805 | /* Support routines for remembering -@netgroup and -user entries. | |
806 | The names are stored in a single string with `|' as separator. */ | |
807 | static void | |
808 | blacklist_store_name (const char *name, ent_t *ent) | |
809 | { | |
810 | int namelen = strlen (name); | |
811 | char *tmp; | |
812 | ||
813 | /* first call, setup cache */ | |
814 | if (ent->blacklist.size == 0) | |
815 | { | |
816 | ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen); | |
817 | ent->blacklist.data = malloc (ent->blacklist.size); | |
818 | if (ent->blacklist.data == NULL) | |
819 | return; | |
820 | ent->blacklist.data[0] = '|'; | |
821 | ent->blacklist.data[1] = '\0'; | |
822 | ent->blacklist.current = 1; | |
823 | } | |
824 | else | |
825 | { | |
826 | if (in_blacklist (name, namelen, ent)) | |
827 | return; /* no duplicates */ | |
828 | ||
829 | if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size) | |
830 | { | |
831 | ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen); | |
832 | tmp = realloc (ent->blacklist.data, ent->blacklist.size); | |
833 | if (tmp == NULL) | |
834 | { | |
835 | free (ent->blacklist.data); | |
836 | ent->blacklist.size = 0; | |
837 | return; | |
838 | } | |
839 | ent->blacklist.data = tmp; | |
840 | } | |
841 | } | |
842 | ||
843 | tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name); | |
844 | *tmp++ = '|'; | |
845 | *tmp = '\0'; | |
846 | ent->blacklist.current += namelen + 1; | |
847 | ||
848 | return; | |
849 | } | |
850 | ||
c131718c | 851 | /* Returns TRUE if ent->blacklist contains name, else FALSE. */ |
6259ec0d UD |
852 | static bool_t |
853 | in_blacklist (const char *name, int namelen, ent_t *ent) | |
854 | { | |
855 | char buf[namelen + 3]; | |
c131718c | 856 | char *cp; |
6259ec0d UD |
857 | |
858 | if (ent->blacklist.data == NULL) | |
859 | return FALSE; | |
860 | ||
c131718c UD |
861 | buf[0] = '|'; |
862 | cp = stpcpy (&buf[1], name); | |
1e2e27fd | 863 | *cp++ = '|'; |
c131718c | 864 | *cp = '\0'; |
6259ec0d UD |
865 | return strstr (ent->blacklist.data, buf) != NULL; |
866 | } |