]>
Commit | Line | Data |
---|---|---|
319b9ad4 UD |
1 | /* Copyright (C) 1996-1999,2001-2007,2009,2010,2011 |
2 | Free Software Foundation, Inc. | |
2303f5fd UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
5f0e6fc7 | 5 | |
2303f5fd | 6 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
5f0e6fc7 | 10 | |
2303f5fd UD |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
5f0e6fc7 | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
5f0e6fc7 RM |
20 | |
21 | #include <ctype.h> | |
22 | #include <dlfcn.h> | |
a8874ead | 23 | #include <errno.h> |
5f0e6fc7 | 24 | #include <netdb.h> |
5107cf1d | 25 | #include <bits/libc-lock.h> |
5f0e6fc7 RM |
26 | #include <search.h> |
27 | #include <stdio.h> | |
2706ee38 | 28 | #include <stdio_ext.h> |
5f0e6fc7 RM |
29 | #include <stdlib.h> |
30 | #include <string.h> | |
5107cf1d | 31 | |
7f28638c AJ |
32 | #include <aliases.h> |
33 | #include <grp.h> | |
34 | #include <netinet/ether.h> | |
35 | #include <pwd.h> | |
36 | #include <shadow.h> | |
37 | ||
b5567b2a | 38 | #if !defined DO_STATIC_NSS || defined SHARED |
5107cf1d UD |
39 | # include <gnu/lib-names.h> |
40 | #endif | |
5f0e6fc7 RM |
41 | |
42 | #include "nsswitch.h" | |
ef4d5b32 | 43 | #include "../nscd/nscd_proto.h" |
319b9ad4 | 44 | #include <sysdep.h> |
5f0e6fc7 RM |
45 | |
46 | /* Prototypes for the local functions. */ | |
dfd2257a UD |
47 | static name_database *nss_parse_file (const char *fname) internal_function; |
48 | static name_database_entry *nss_getline (char *line) internal_function; | |
49 | static service_user *nss_parse_service_list (const char *line) | |
50 | internal_function; | |
5f0e6fc7 | 51 | static service_library *nss_new_service (name_database *database, |
dfd2257a | 52 | const char *name) internal_function; |
5f0e6fc7 RM |
53 | |
54 | ||
a8874ead UD |
55 | /* Declare external database variables. */ |
56 | #define DEFINE_DATABASE(name) \ | |
6455d255 | 57 | extern service_user *__nss_##name##_database attribute_hidden; \ |
a8874ead UD |
58 | weak_extern (__nss_##name##_database) |
59 | #include "databases.def" | |
60 | #undef DEFINE_DATABASE | |
61 | ||
62 | /* Structure to map database name to variable. */ | |
3d50529d | 63 | static const struct |
a8874ead | 64 | { |
3d50529d | 65 | const char name[10]; |
a8874ead UD |
66 | service_user **dbp; |
67 | } databases[] = | |
68 | { | |
69 | #define DEFINE_DATABASE(name) \ | |
70 | { #name, &__nss_##name##_database }, | |
71 | #include "databases.def" | |
72 | #undef DEFINE_DATABASE | |
73 | }; | |
e7c8359e | 74 | #define ndatabases (sizeof (databases) / sizeof (databases[0])) |
a8874ead | 75 | |
c3e2f19b UD |
76 | /* Flags whether custom rules for database is set. */ |
77 | bool __nss_database_custom[NSS_DBSIDX_max]; | |
78 | ||
a8874ead | 79 | |
1e16111c | 80 | __libc_lock_define_initialized (static, lock) |
5f0e6fc7 | 81 | |
b5567b2a | 82 | #if !defined DO_STATIC_NSS || defined SHARED |
56552e42 | 83 | /* String with revision number of the shared object files. */ |
1fb05e3d | 84 | static const char *const __nss_shlib_revision = LIBNSS_FILES_SO + 15; |
5107cf1d | 85 | #endif |
5f0e6fc7 RM |
86 | |
87 | /* The root of the whole data base. */ | |
88 | static name_database *service_table; | |
89 | ||
90 | ||
319b9ad4 UD |
91 | /* Nonzero if this is the nscd process. */ |
92 | static bool is_nscd; | |
93 | /* The callback passed to the init functions when nscd is used. */ | |
94 | static void (*nscd_init_cb) (size_t, struct traced_file *); | |
95 | ||
96 | ||
5f0e6fc7 RM |
97 | /* -1 == database not found |
98 | 0 == database entry pointer stored */ | |
99 | int | |
68dbb3a6 UD |
100 | __nss_database_lookup (const char *database, const char *alternate_name, |
101 | const char *defconfig, service_user **ni) | |
5f0e6fc7 | 102 | { |
a8874ead UD |
103 | /* Prevent multiple threads to change the service table. */ |
104 | __libc_lock_lock (lock); | |
bba7bb78 | 105 | |
a8874ead UD |
106 | /* Reconsider database variable in case some other thread called |
107 | `__nss_configure_lookup' while we waited for the lock. */ | |
108 | if (*ni != NULL) | |
15a83d04 UD |
109 | { |
110 | __libc_lock_unlock (lock); | |
111 | return 0; | |
112 | } | |
a8874ead | 113 | |
56552e42 UD |
114 | /* Are we initialized yet? */ |
115 | if (service_table == NULL) | |
a8874ead UD |
116 | /* Read config file. */ |
117 | service_table = nss_parse_file (_PATH_NSSWITCH_CONF); | |
5f0e6fc7 RM |
118 | |
119 | /* Test whether configuration data is available. */ | |
a8874ead | 120 | if (service_table != NULL) |
5f0e6fc7 | 121 | { |
a8874ead UD |
122 | /* Return first `service_user' entry for DATABASE. */ |
123 | name_database_entry *entry; | |
c66273aa RM |
124 | |
125 | /* XXX Could use some faster mechanism here. But each database is | |
126 | only requested once and so this might not be critical. */ | |
127 | for (entry = service_table->entry; entry != NULL; entry = entry->next) | |
128 | if (strcmp (database, entry->name) == 0) | |
15a83d04 | 129 | *ni = entry->service; |
68dbb3a6 UD |
130 | |
131 | if (*ni == NULL && alternate_name != NULL) | |
e7fd8a39 UD |
132 | /* We haven't found an entry so far. Try to find it with the |
133 | alternative name. */ | |
68dbb3a6 UD |
134 | for (entry = service_table->entry; entry != NULL; entry = entry->next) |
135 | if (strcmp (alternate_name, entry->name) == 0) | |
136 | *ni = entry->service; | |
5f0e6fc7 RM |
137 | } |
138 | ||
c66273aa | 139 | /* No configuration data is available, either because nsswitch.conf |
319b9ad4 | 140 | doesn't exist or because it doesn't have a line for this database. |
a8874ead UD |
141 | |
142 | DEFCONFIG specifies the default service list for this database, | |
bba7bb78 | 143 | or null to use the most common default. */ |
15a83d04 UD |
144 | if (*ni == NULL) |
145 | *ni = nss_parse_service_list (defconfig | |
10dc2a90 | 146 | ?: "nis [NOTFOUND=return] files"); |
a8874ead UD |
147 | |
148 | __libc_lock_unlock (lock); | |
bba7bb78 | 149 | |
64031225 | 150 | return *ni != NULL ? 0 : -1; |
5f0e6fc7 | 151 | } |
37ba7d66 | 152 | libc_hidden_def (__nss_database_lookup) |
5f0e6fc7 RM |
153 | |
154 | ||
155 | /* -1 == not found | |
4317f9e1 | 156 | 0 == function found |
14ea22e9 | 157 | 1 == finished */ |
5f0e6fc7 | 158 | int |
384ca551 UD |
159 | __nss_lookup (service_user **ni, const char *fct_name, const char *fct2_name, |
160 | void **fctp) | |
5f0e6fc7 | 161 | { |
899d423e | 162 | *fctp = __nss_lookup_function (*ni, fct_name); |
384ca551 | 163 | if (*fctp == NULL && fct2_name != NULL) |
0dc6c5e4 | 164 | *fctp = __nss_lookup_function (*ni, fct2_name); |
5f0e6fc7 RM |
165 | |
166 | while (*fctp == NULL | |
167 | && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE | |
168 | && (*ni)->next != NULL) | |
169 | { | |
170 | *ni = (*ni)->next; | |
171 | ||
899d423e | 172 | *fctp = __nss_lookup_function (*ni, fct_name); |
384ca551 | 173 | if (*fctp == NULL && fct2_name != NULL) |
0dc6c5e4 | 174 | *fctp = __nss_lookup_function (*ni, fct2_name); |
5f0e6fc7 RM |
175 | } |
176 | ||
14ea22e9 | 177 | return *fctp != NULL ? 0 : (*ni)->next == NULL ? 1 : -1; |
5f0e6fc7 RM |
178 | } |
179 | ||
180 | ||
181 | /* -1 == not found | |
182 | 0 == adjusted for next function | |
183 | 1 == finished */ | |
184 | int | |
384ca551 UD |
185 | __nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name, |
186 | void **fctp, int status, int all_values) | |
5f0e6fc7 RM |
187 | { |
188 | if (all_values) | |
189 | { | |
190 | if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN | |
191 | && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN | |
192 | && nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN | |
193 | && nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN) | |
194 | return 1; | |
195 | } | |
196 | else | |
197 | { | |
198 | /* This is really only for debugging. */ | |
384ca551 UD |
199 | if (__builtin_expect (NSS_STATUS_TRYAGAIN > status |
200 | || status > NSS_STATUS_RETURN, 0)) | |
79dbd981 | 201 | __libc_fatal ("illegal status in __nss_next"); |
5f0e6fc7 RM |
202 | |
203 | if (nss_next_action (*ni, status) == NSS_ACTION_RETURN) | |
204 | return 1; | |
205 | } | |
206 | ||
207 | if ((*ni)->next == NULL) | |
208 | return -1; | |
209 | ||
210 | do | |
211 | { | |
212 | *ni = (*ni)->next; | |
213 | ||
899d423e | 214 | *fctp = __nss_lookup_function (*ni, fct_name); |
384ca551 UD |
215 | if (*fctp == NULL && fct2_name != NULL) |
216 | *fctp = __nss_lookup_function (*ni, fct2_name); | |
5f0e6fc7 RM |
217 | } |
218 | while (*fctp == NULL | |
219 | && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE | |
220 | && (*ni)->next != NULL); | |
221 | ||
222 | return *fctp != NULL ? 0 : -1; | |
223 | } | |
384ca551 UD |
224 | libc_hidden_def (__nss_next2) |
225 | ||
226 | ||
227 | int | |
228 | attribute_compat_text_section | |
229 | __nss_next (service_user **ni, const char *fct_name, void **fctp, int status, | |
230 | int all_values) | |
231 | { | |
232 | return __nss_next2 (ni, fct_name, NULL, fctp, status, all_values); | |
233 | } | |
5f0e6fc7 RM |
234 | |
235 | ||
a8874ead UD |
236 | int |
237 | __nss_configure_lookup (const char *dbname, const char *service_line) | |
238 | { | |
239 | service_user *new_db; | |
240 | size_t cnt; | |
241 | ||
e7c8359e | 242 | for (cnt = 0; cnt < ndatabases; ++cnt) |
df21c858 UD |
243 | { |
244 | int cmp = strcmp (dbname, databases[cnt].name); | |
245 | if (cmp == 0) | |
246 | break; | |
5a97622d | 247 | if (cmp < 0) |
df21c858 | 248 | { |
c4029823 | 249 | __set_errno (EINVAL); |
df21c858 UD |
250 | return -1; |
251 | } | |
252 | } | |
a8874ead | 253 | |
e7c8359e | 254 | if (cnt == ndatabases) |
a8874ead | 255 | { |
c4029823 | 256 | __set_errno (EINVAL); |
a8874ead UD |
257 | return -1; |
258 | } | |
259 | ||
260 | /* Test whether it is really used. */ | |
261 | if (databases[cnt].dbp == NULL) | |
262 | /* Nothing to do, but we could do. */ | |
263 | return 0; | |
264 | ||
265 | /* Try to generate new data. */ | |
266 | new_db = nss_parse_service_list (service_line); | |
267 | if (new_db == NULL) | |
268 | { | |
269 | /* Illegal service specification. */ | |
c4029823 | 270 | __set_errno (EINVAL); |
a8874ead UD |
271 | return -1; |
272 | } | |
273 | ||
274 | /* Prevent multiple threads to change the service table. */ | |
275 | __libc_lock_lock (lock); | |
276 | ||
277 | /* Install new rules. */ | |
278 | *databases[cnt].dbp = new_db; | |
c3e2f19b | 279 | __nss_database_custom[cnt] = true; |
a8874ead UD |
280 | |
281 | __libc_lock_unlock (lock); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | ||
2064087b RM |
287 | /* Comparison function for searching NI->known tree. */ |
288 | static int | |
289 | known_compare (const void *p1, const void *p2) | |
290 | { | |
291 | return p1 == p2 ? 0 : strcmp (*(const char *const *) p1, | |
292 | *(const char *const *) p2); | |
293 | } | |
294 | ||
295 | ||
319b9ad4 UD |
296 | #if !defined DO_STATIC_NSS || defined SHARED |
297 | /* Load library. */ | |
298 | static int | |
299 | nss_load_library (service_user *ni) | |
300 | { | |
301 | if (ni->library == NULL) | |
302 | { | |
303 | /* This service has not yet been used. Fetch the service | |
304 | library for it, creating a new one if need be. If there | |
305 | is no service table from the file, this static variable | |
306 | holds the head of the service_library list made from the | |
307 | default configuration. */ | |
308 | static name_database default_table; | |
309 | ni->library = nss_new_service (service_table ?: &default_table, | |
310 | ni->name); | |
311 | if (ni->library == NULL) | |
312 | return -1; | |
313 | } | |
314 | ||
315 | if (ni->library->lib_handle == NULL) | |
316 | { | |
317 | /* Load the shared library. */ | |
318 | size_t shlen = (7 + strlen (ni->library->name) + 3 | |
319 | + strlen (__nss_shlib_revision) + 1); | |
320 | int saved_errno = errno; | |
321 | char shlib_name[shlen]; | |
322 | ||
323 | /* Construct shared object name. */ | |
324 | __stpcpy (__stpcpy (__stpcpy (__stpcpy (shlib_name, | |
325 | "libnss_"), | |
326 | ni->library->name), | |
327 | ".so"), | |
328 | __nss_shlib_revision); | |
329 | ||
330 | ni->library->lib_handle = __libc_dlopen (shlib_name); | |
331 | if (ni->library->lib_handle == NULL) | |
332 | { | |
333 | /* Failed to load the library. */ | |
334 | ni->library->lib_handle = (void *) -1l; | |
335 | __set_errno (saved_errno); | |
336 | } | |
337 | else if (is_nscd) | |
338 | { | |
339 | /* Call the init function when nscd is used. */ | |
340 | size_t initlen = (5 + strlen (ni->library->name) | |
341 | + strlen ("_init") + 1); | |
342 | char init_name[initlen]; | |
343 | ||
344 | /* Construct the init function name. */ | |
345 | __stpcpy (__stpcpy (__stpcpy (init_name, | |
346 | "_nss_"), | |
347 | ni->library->name), | |
348 | "_init"); | |
349 | ||
350 | /* Find the optional init function. */ | |
351 | void (*ifct) (void (*) (size_t, struct traced_file *)) | |
352 | = __libc_dlsym (ni->library->lib_handle, init_name); | |
353 | if (ifct != NULL) | |
354 | { | |
355 | void (*cb) (size_t, struct traced_file *) = nscd_init_cb; | |
356 | # ifdef PTR_DEMANGLE | |
357 | PTR_DEMANGLE (cb); | |
358 | # endif | |
359 | ifct (cb); | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | return 0; | |
365 | } | |
366 | #endif | |
367 | ||
368 | ||
899d423e UD |
369 | void * |
370 | __nss_lookup_function (service_user *ni, const char *fct_name) | |
5f0e6fc7 | 371 | { |
dbe31b9a | 372 | void **found, *result; |
5f0e6fc7 | 373 | |
5f0e6fc7 RM |
374 | /* We now modify global data. Protect it. */ |
375 | __libc_lock_lock (lock); | |
376 | ||
dbe31b9a RM |
377 | /* Search the tree of functions previously requested. Data in the |
378 | tree are `known_function' structures, whose first member is a | |
379 | `const char *', the lookup key. The search returns a pointer to | |
380 | the tree node structure; the first member of the is a pointer to | |
381 | our structure (i.e. what will be a `known_function'); since the | |
382 | first member of that is the lookup key string, &FCT_NAME is close | |
383 | enough to a pointer to our structure to use as a lookup key that | |
384 | will be passed to `known_compare' (above). */ | |
385 | ||
701666b7 | 386 | found = __tsearch (&fct_name, &ni->known, &known_compare); |
0490345c JO |
387 | if (found == NULL) |
388 | /* This means out-of-memory. */ | |
389 | result = NULL; | |
390 | else if (*found != &fct_name) | |
4ec77f72 UD |
391 | { |
392 | /* The search found an existing structure in the tree. */ | |
393 | result = ((known_function *) *found)->fct_ptr; | |
394 | PTR_DEMANGLE (result); | |
395 | } | |
dbe31b9a | 396 | else |
5f0e6fc7 | 397 | { |
dbe31b9a RM |
398 | /* This name was not known before. Now we have a node in the tree |
399 | (in the proper sorted position for FCT_NAME) that points to | |
400 | &FCT_NAME instead of any real `known_function' structure. | |
401 | Allocate a new structure and fill it in. */ | |
5f0e6fc7 | 402 | |
dbe31b9a RM |
403 | known_function *known = malloc (sizeof *known); |
404 | if (! known) | |
5f0e6fc7 | 405 | { |
dbe31b9a RM |
406 | remove_from_tree: |
407 | /* Oops. We can't instantiate this node properly. | |
408 | Remove it from the tree. */ | |
701666b7 | 409 | __tdelete (&fct_name, &ni->known, &known_compare); |
054c0457 | 410 | free (known); |
dbe31b9a | 411 | result = NULL; |
5f0e6fc7 | 412 | } |
dbe31b9a | 413 | else |
5f0e6fc7 | 414 | { |
dbe31b9a RM |
415 | /* Point the tree node at this new structure. */ |
416 | *found = known; | |
417 | known->fct_name = fct_name; | |
418 | ||
b5567b2a | 419 | #if !defined DO_STATIC_NSS || defined SHARED |
319b9ad4 UD |
420 | /* Load the appropriate library. */ |
421 | if (nss_load_library (ni) != 0) | |
054c0457 UD |
422 | /* This only happens when out of memory. */ |
423 | goto remove_from_tree; | |
dbe31b9a | 424 | |
8a523922 | 425 | if (ni->library->lib_handle == (void *) -1l) |
dbe31b9a RM |
426 | /* Library not found => function not found. */ |
427 | result = NULL; | |
428 | else | |
429 | { | |
b3fc5f84 | 430 | /* Get the desired function. */ |
dbe31b9a RM |
431 | size_t namlen = (5 + strlen (ni->library->name) + 1 |
432 | + strlen (fct_name) + 1); | |
b3fc5f84 | 433 | char name[namlen]; |
dbe31b9a RM |
434 | |
435 | /* Construct the function name. */ | |
b3fc5f84 | 436 | __stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"), |
dbe31b9a RM |
437 | ni->library->name), |
438 | "_"), | |
439 | fct_name); | |
440 | ||
441 | /* Look up the symbol. */ | |
b3fc5f84 | 442 | result = __libc_dlsym (ni->library->lib_handle, name); |
dbe31b9a | 443 | } |
5107cf1d UD |
444 | #else |
445 | /* We can't get function address dynamically in static linking. */ | |
446 | { | |
5107cf1d | 447 | # define DEFINE_ENT(h,nm) \ |
1522c368 UD |
448 | { #h"_get"#nm"ent_r", _nss_##h##_get##nm##ent_r }, \ |
449 | { #h"_end"#nm"ent", _nss_##h##_end##nm##ent }, \ | |
5107cf1d UD |
450 | { #h"_set"#nm"ent", _nss_##h##_set##nm##ent }, |
451 | # define DEFINE_GET(h,nm) \ | |
452 | { #h"_get"#nm"_r", _nss_##h##_get##nm##_r }, | |
453 | # define DEFINE_GETBY(h,nm,ky) \ | |
454 | { #h"_get"#nm"by"#ky"_r", _nss_##h##_get##nm##by##ky##_r }, | |
455 | static struct fct_tbl { const char *fname; void *fp; } *tp, tbl[] = | |
456 | { | |
1522c368 | 457 | # include "function.def" |
5107cf1d UD |
458 | { NULL, NULL } |
459 | }; | |
460 | size_t namlen = (5 + strlen (ni->library->name) + 1 | |
461 | + strlen (fct_name) + 1); | |
462 | char name[namlen]; | |
463 | ||
464 | /* Construct the function name. */ | |
465 | __stpcpy (__stpcpy (__stpcpy (name, ni->library->name), | |
466 | "_"), | |
467 | fct_name); | |
468 | ||
469 | result = NULL; | |
470 | for (tp = &tbl[0]; tp->fname; tp++) | |
471 | if (strcmp (tp->fname, name) == 0) | |
472 | { | |
473 | result = tp->fp; | |
474 | break; | |
475 | } | |
476 | } | |
477 | #endif | |
dbe31b9a RM |
478 | |
479 | /* Remember function pointer for later calls. Even if null, we | |
480 | record it so a second try needn't search the library again. */ | |
481 | known->fct_ptr = result; | |
4ec77f72 | 482 | PTR_MANGLE (known->fct_ptr); |
5f0e6fc7 | 483 | } |
5f0e6fc7 RM |
484 | } |
485 | ||
5f0e6fc7 RM |
486 | /* Remove the lock. */ |
487 | __libc_lock_unlock (lock); | |
488 | ||
489 | return result; | |
490 | } | |
5556fc6a | 491 | libc_hidden_def (__nss_lookup_function) |
5f0e6fc7 RM |
492 | |
493 | ||
5f0e6fc7 | 494 | static name_database * |
dfd2257a | 495 | internal_function |
5f0e6fc7 RM |
496 | nss_parse_file (const char *fname) |
497 | { | |
498 | FILE *fp; | |
499 | name_database *result; | |
500 | name_database_entry *last; | |
501 | char *line; | |
502 | size_t len; | |
503 | ||
504 | /* Open the configuration file. */ | |
ee8449f7 | 505 | fp = fopen (fname, "rc"); |
5f0e6fc7 RM |
506 | if (fp == NULL) |
507 | return NULL; | |
508 | ||
2706ee38 UD |
509 | /* No threads use this stream. */ |
510 | __fsetlocking (fp, FSETLOCKING_BYCALLER); | |
511 | ||
5f0e6fc7 RM |
512 | result = (name_database *) malloc (sizeof (name_database)); |
513 | if (result == NULL) | |
319b9ad4 UD |
514 | { |
515 | fclose (fp); | |
516 | return NULL; | |
517 | } | |
5f0e6fc7 RM |
518 | |
519 | result->entry = NULL; | |
520 | result->library = NULL; | |
521 | last = NULL; | |
522 | line = NULL; | |
523 | len = 0; | |
524 | do | |
525 | { | |
526 | name_database_entry *this; | |
527 | ssize_t n; | |
5f0e6fc7 | 528 | |
bba7bb78 | 529 | n = __getline (&line, &len, fp); |
5f0e6fc7 RM |
530 | if (n < 0) |
531 | break; | |
532 | if (line[n - 1] == '\n') | |
533 | line[n - 1] = '\0'; | |
534 | ||
535 | /* Because the file format does not know any form of quoting we | |
536 | can search forward for the next '#' character and if found | |
537 | make it terminating the line. */ | |
c4563d2d | 538 | *__strchrnul (line, '#') = '\0'; |
5f0e6fc7 RM |
539 | |
540 | /* If the line is blank it is ignored. */ | |
541 | if (line[0] == '\0') | |
542 | continue; | |
543 | ||
544 | /* Each line completely specifies the actions for a database. */ | |
545 | this = nss_getline (line); | |
546 | if (this != NULL) | |
547 | { | |
548 | if (last != NULL) | |
549 | last->next = this; | |
550 | else | |
551 | result->entry = this; | |
552 | ||
553 | last = this; | |
554 | } | |
555 | } | |
71412a8c | 556 | while (!feof_unlocked (fp)); |
5f0e6fc7 RM |
557 | |
558 | /* Free the buffer. */ | |
559 | free (line); | |
560 | /* Close configuration file. */ | |
561 | fclose (fp); | |
562 | ||
5f0e6fc7 RM |
563 | return result; |
564 | } | |
565 | ||
566 | ||
a8874ead UD |
567 | /* Read the source names: |
568 | `( <source> ( "[" "!"? (<status> "=" <action> )+ "]" )? )*' | |
569 | */ | |
bba7bb78 | 570 | static service_user * |
dfd2257a | 571 | internal_function |
bba7bb78 | 572 | nss_parse_service_list (const char *line) |
5f0e6fc7 | 573 | { |
bba7bb78 | 574 | service_user *result = NULL, **nextp = &result; |
5f0e6fc7 | 575 | |
5f0e6fc7 RM |
576 | while (1) |
577 | { | |
578 | service_user *new_service; | |
3776d592 | 579 | const char *name; |
5f0e6fc7 RM |
580 | |
581 | while (isspace (line[0])) | |
582 | ++line; | |
583 | if (line[0] == '\0') | |
584 | /* No source specified. */ | |
585 | return result; | |
586 | ||
587 | /* Read <source> identifier. */ | |
588 | name = line; | |
589 | while (line[0] != '\0' && !isspace (line[0]) && line[0] != '[') | |
590 | ++line; | |
591 | if (name == line) | |
592 | return result; | |
593 | ||
594 | ||
1a989e00 UD |
595 | new_service = (service_user *) malloc (sizeof (service_user) |
596 | + (line - name + 1)); | |
5f0e6fc7 RM |
597 | if (new_service == NULL) |
598 | return result; | |
5f0e6fc7 | 599 | |
1a989e00 | 600 | *((char *) __mempcpy (new_service->name, name, line - name)) = '\0'; |
5f0e6fc7 RM |
601 | |
602 | /* Set default actions. */ | |
603 | new_service->actions[2 + NSS_STATUS_TRYAGAIN] = NSS_ACTION_CONTINUE; | |
604 | new_service->actions[2 + NSS_STATUS_UNAVAIL] = NSS_ACTION_CONTINUE; | |
605 | new_service->actions[2 + NSS_STATUS_NOTFOUND] = NSS_ACTION_CONTINUE; | |
606 | new_service->actions[2 + NSS_STATUS_SUCCESS] = NSS_ACTION_RETURN; | |
a68b0d31 | 607 | new_service->actions[2 + NSS_STATUS_RETURN] = NSS_ACTION_RETURN; |
5f0e6fc7 RM |
608 | new_service->library = NULL; |
609 | new_service->known = NULL; | |
610 | new_service->next = NULL; | |
611 | ||
612 | while (isspace (line[0])) | |
613 | ++line; | |
614 | ||
615 | if (line[0] == '[') | |
616 | { | |
5f0e6fc7 RM |
617 | /* Read criterions. */ |
618 | do | |
619 | ++line; | |
620 | while (line[0] != '\0' && isspace (line[0])); | |
621 | ||
622 | do | |
623 | { | |
bba7bb78 RM |
624 | int not; |
625 | enum nss_status status; | |
626 | lookup_actions action; | |
627 | ||
628 | /* Grok ! before name to mean all statii but that one. */ | |
6796bc80 UD |
629 | not = line[0] == '!'; |
630 | if (not) | |
bba7bb78 RM |
631 | ++line; |
632 | ||
5f0e6fc7 RM |
633 | /* Read status name. */ |
634 | name = line; | |
635 | while (line[0] != '\0' && !isspace (line[0]) && line[0] != '=' | |
636 | && line[0] != ']') | |
637 | ++line; | |
638 | ||
639 | /* Compare with known statii. */ | |
640 | if (line - name == 7) | |
641 | { | |
bba7bb78 | 642 | if (__strncasecmp (name, "SUCCESS", 7) == 0) |
5f0e6fc7 | 643 | status = NSS_STATUS_SUCCESS; |
bba7bb78 | 644 | else if (__strncasecmp (name, "UNAVAIL", 7) == 0) |
5f0e6fc7 RM |
645 | status = NSS_STATUS_UNAVAIL; |
646 | else | |
647 | return result; | |
648 | } | |
649 | else if (line - name == 8) | |
650 | { | |
bba7bb78 | 651 | if (__strncasecmp (name, "NOTFOUND", 8) == 0) |
5f0e6fc7 | 652 | status = NSS_STATUS_NOTFOUND; |
bba7bb78 | 653 | else if (__strncasecmp (name, "TRYAGAIN", 8) == 0) |
5f0e6fc7 RM |
654 | status = NSS_STATUS_TRYAGAIN; |
655 | else | |
656 | return result; | |
657 | } | |
658 | else | |
659 | return result; | |
660 | ||
661 | while (isspace (line[0])) | |
662 | ++line; | |
663 | if (line[0] != '=') | |
664 | return result; | |
665 | do | |
666 | ++line; | |
667 | while (isspace (line[0])); | |
668 | ||
669 | name = line; | |
670 | while (line[0] != '\0' && !isspace (line[0]) && line[0] != '=' | |
671 | && line[0] != ']') | |
672 | ++line; | |
673 | ||
bba7bb78 RM |
674 | if (line - name == 6 && __strncasecmp (name, "RETURN", 6) == 0) |
675 | action = NSS_ACTION_RETURN; | |
5f0e6fc7 | 676 | else if (line - name == 8 |
bba7bb78 RM |
677 | && __strncasecmp (name, "CONTINUE", 8) == 0) |
678 | action = NSS_ACTION_CONTINUE; | |
5f0e6fc7 RM |
679 | else |
680 | return result; | |
681 | ||
bba7bb78 RM |
682 | if (not) |
683 | { | |
684 | /* Save the current action setting for this status, | |
685 | set them all to the given action, and reset this one. */ | |
686 | const lookup_actions save = new_service->actions[2 + status]; | |
687 | new_service->actions[2 + NSS_STATUS_TRYAGAIN] = action; | |
688 | new_service->actions[2 + NSS_STATUS_UNAVAIL] = action; | |
689 | new_service->actions[2 + NSS_STATUS_NOTFOUND] = action; | |
690 | new_service->actions[2 + NSS_STATUS_SUCCESS] = action; | |
691 | new_service->actions[2 + status] = save; | |
692 | } | |
693 | else | |
694 | new_service->actions[2 + status] = action; | |
695 | ||
696 | /* Skip white spaces. */ | |
5f0e6fc7 RM |
697 | while (isspace (line[0])) |
698 | ++line; | |
699 | } | |
700 | while (line[0] != ']'); | |
701 | ||
702 | /* Skip the ']'. */ | |
703 | ++line; | |
704 | } | |
705 | ||
bba7bb78 RM |
706 | *nextp = new_service; |
707 | nextp = &new_service->next; | |
5f0e6fc7 | 708 | } |
bba7bb78 RM |
709 | } |
710 | ||
711 | static name_database_entry * | |
dfd2257a | 712 | internal_function |
bba7bb78 RM |
713 | nss_getline (char *line) |
714 | { | |
715 | const char *name; | |
716 | name_database_entry *result; | |
1a989e00 | 717 | size_t len; |
bba7bb78 RM |
718 | |
719 | /* Ignore leading white spaces. ATTENTION: this is different from | |
720 | what is implemented in Solaris. The Solaris man page says a line | |
721 | beginning with a white space character is ignored. We regard | |
722 | this as just another misfeature in Solaris. */ | |
723 | while (isspace (line[0])) | |
724 | ++line; | |
725 | ||
726 | /* Recognize `<database> ":"'. */ | |
727 | name = line; | |
728 | while (line[0] != '\0' && !isspace (line[0]) && line[0] != ':') | |
729 | ++line; | |
730 | if (line[0] == '\0' || name == line) | |
731 | /* Syntax error. */ | |
732 | return NULL; | |
733 | *line++ = '\0'; | |
734 | ||
1a989e00 UD |
735 | len = strlen (name) + 1; |
736 | ||
737 | result = (name_database_entry *) malloc (sizeof (name_database_entry) + len); | |
bba7bb78 RM |
738 | if (result == NULL) |
739 | return NULL; | |
740 | ||
741 | /* Save the database name. */ | |
1a989e00 | 742 | memcpy (result->name, name, len); |
bba7bb78 RM |
743 | |
744 | /* Parse the list of services. */ | |
745 | result->service = nss_parse_service_list (line); | |
746 | ||
747 | result->next = NULL; | |
748 | return result; | |
5f0e6fc7 RM |
749 | } |
750 | ||
751 | ||
752 | static service_library * | |
dfd2257a | 753 | internal_function |
5f0e6fc7 RM |
754 | nss_new_service (name_database *database, const char *name) |
755 | { | |
756 | service_library **currentp = &database->library; | |
757 | ||
758 | while (*currentp != NULL) | |
759 | { | |
760 | if (strcmp ((*currentp)->name, name) == 0) | |
761 | return *currentp; | |
762 | currentp = &(*currentp)->next; | |
763 | } | |
764 | ||
765 | /* We have to add the new service. */ | |
766 | *currentp = (service_library *) malloc (sizeof (service_library)); | |
767 | if (*currentp == NULL) | |
768 | return NULL; | |
769 | ||
770 | (*currentp)->name = name; | |
771 | (*currentp)->lib_handle = NULL; | |
772 | (*currentp)->next = NULL; | |
773 | ||
774 | return *currentp; | |
775 | } | |
d60d215c UD |
776 | |
777 | ||
319b9ad4 UD |
778 | #ifdef SHARED |
779 | /* Load all libraries for the service. */ | |
780 | static void | |
781 | nss_load_all_libraries (const char *service, const char *def) | |
782 | { | |
783 | service_user *ni = NULL; | |
784 | ||
785 | if (__nss_database_lookup (service, NULL, def, &ni) == 0) | |
786 | while (ni != NULL) | |
787 | { | |
788 | nss_load_library (ni); | |
789 | ni = ni->next; | |
790 | } | |
791 | } | |
792 | ||
793 | ||
ef4d5b32 UD |
794 | /* Called by nscd and nscd alone. */ |
795 | void | |
319b9ad4 | 796 | __nss_disable_nscd (void (*cb) (size_t, struct traced_file *)) |
ef4d5b32 | 797 | { |
319b9ad4 UD |
798 | # ifdef PTR_MANGLE |
799 | PTR_MANGLE (cb); | |
800 | # endif | |
801 | nscd_init_cb = cb; | |
802 | is_nscd = true; | |
803 | ||
804 | /* Find all the relevant modules so that the init functions are called. */ | |
805 | nss_load_all_libraries ("passwd", "compat [NOTFOUND=return] files"); | |
806 | nss_load_all_libraries ("group", "compat [NOTFOUND=return] files"); | |
807 | nss_load_all_libraries ("hosts", "dns [!UNAVAIL=return] files"); | |
808 | nss_load_all_libraries ("services", NULL); | |
809 | ||
ef4d5b32 UD |
810 | /* Disable all uses of NSCD. */ |
811 | __nss_not_use_nscd_passwd = -1; | |
812 | __nss_not_use_nscd_group = -1; | |
813 | __nss_not_use_nscd_hosts = -1; | |
b21fa963 | 814 | __nss_not_use_nscd_services = -1; |
ef4d5b32 | 815 | } |
319b9ad4 | 816 | #endif |
ef4d5b32 UD |
817 | |
818 | ||
d60d215c | 819 | /* Free all resources if necessary. */ |
c877418f | 820 | libc_freeres_fn (free_mem) |
d60d215c UD |
821 | { |
822 | name_database *top = service_table; | |
823 | name_database_entry *entry; | |
824 | service_library *library; | |
825 | ||
826 | if (top == NULL) | |
827 | /* Maybe we have not read the nsswitch.conf file. */ | |
828 | return; | |
829 | ||
830 | /* Don't disturb ongoing other threads (if there are any). */ | |
831 | service_table = NULL; | |
832 | ||
833 | entry = top->entry; | |
834 | while (entry != NULL) | |
835 | { | |
836 | name_database_entry *olde = entry; | |
837 | service_user *service = entry->service; | |
838 | ||
839 | while (service != NULL) | |
840 | { | |
841 | service_user *olds = service; | |
842 | ||
843 | if (service->known != NULL) | |
1483b753 | 844 | __tdestroy (service->known, free); |
d60d215c UD |
845 | |
846 | service = service->next; | |
847 | free (olds); | |
848 | } | |
849 | ||
850 | entry = entry->next; | |
851 | free (olde); | |
852 | } | |
853 | ||
854 | library = top->library; | |
855 | while (library != NULL) | |
856 | { | |
857 | service_library *oldl = library; | |
858 | ||
0ab7f77e RM |
859 | if (library->lib_handle && library->lib_handle != (void *) -1l) |
860 | __libc_dlclose (library->lib_handle); | |
d60d215c UD |
861 | |
862 | library = library->next; | |
863 | free (oldl); | |
864 | } | |
865 | ||
866 | free (top); | |
867 | } |