1 /* Copyright (C) 1996-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
24 #include <bits/libc-lock.h>
25 #include <rpcsvc/yp.h>
26 #include <rpcsvc/ypclnt.h>
31 /* Get the declaration of the parser function. */
33 #define STRUCTURE group
35 #include <nss/nss_files/files-parse.c>
37 /* Protect global state against multiple changers */
38 __libc_lock_define_initialized (static, lock)
40 static bool_t new_start = 1;
43 static intern_t intern;
47 internal_nis_endgrent (void)
57 struct response_t *curr = intern.start;
61 struct response_t *last = curr;
66 intern.next = intern.start = NULL;
71 _nss_nis_endgrent (void)
73 __libc_lock_lock (lock);
75 internal_nis_endgrent ();
77 __libc_lock_unlock (lock);
79 return NSS_STATUS_SUCCESS;
84 internal_nis_setgrent (void)
86 /* We have to read all the data now. */
88 if (__builtin_expect (yp_get_default_domain (&domain), 0))
89 return NSS_STATUS_UNAVAIL;
91 struct ypall_callback ypcb;
93 ypcb.foreach = _nis_saveit;
94 ypcb.data = (char *) &intern;
95 enum nss_status status = yperr2nss (yp_all (domain, "group.byname", &ypcb));
98 /* Mark the last buffer as full. */
99 if (intern.next != NULL)
100 intern.next->size = intern.offset;
102 intern.next = intern.start;
110 _nss_nis_setgrent (int stayopen)
112 enum nss_status result = NSS_STATUS_SUCCESS;
114 __libc_lock_lock (lock);
116 internal_nis_endgrent ();
118 if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
119 result = internal_nis_setgrent ();
121 __libc_lock_unlock (lock);
127 static enum nss_status
128 internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
131 /* If we read the entire database at setpwent time we just iterate
132 over the data we have in memory. */
133 bool batch_read = intern.start != NULL;
136 if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0))
137 return NSS_STATUS_UNAVAIL;
139 /* Get the next entry until we found a correct one. */
150 struct response_t *bucket;
153 bucket = intern.next;
155 if (__builtin_expect (intern.offset >= bucket->size, 0))
157 if (bucket->next == NULL)
158 return NSS_STATUS_NOTFOUND;
160 /* We look at all the content in the current bucket. Go on
162 bucket = intern.next = bucket->next;
166 for (result = &bucket->mem[intern.offset]; isspace (*result);
170 len = strlen (result);
178 /* Maybe we should read the database in one piece. */
179 if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
180 && internal_nis_setgrent () == NSS_STATUS_SUCCESS
181 && intern.start != NULL)
184 goto handle_batch_read;
187 yperr = yp_first (domain, "group.byname", &outkey, &keylen,
191 yperr = yp_next (domain, "group.byname", oldkey, oldkeylen,
192 &outkey, &keylen, &result, &len);
194 if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
196 enum nss_status retval = yperr2nss (yperr);
198 if (retval == NSS_STATUS_TRYAGAIN)
204 if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
209 return NSS_STATUS_TRYAGAIN;
212 char *p = strncpy (buffer, result, len);
219 parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
221 if (__builtin_expect (parse_res == -1, 0))
226 return NSS_STATUS_TRYAGAIN;
230 intern.offset += len + 1;
239 while (parse_res < 1);
241 return NSS_STATUS_SUCCESS;
245 _nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen,
250 __libc_lock_lock (lock);
252 status = internal_nis_getgrent_r (result, buffer, buflen, errnop);
254 __libc_lock_unlock (lock);
260 _nss_nis_getgrnam_r (const char *name, struct group *grp,
261 char *buffer, size_t buflen, int *errnop)
266 return NSS_STATUS_UNAVAIL;
270 if (__builtin_expect (yp_get_default_domain (&domain), 0))
271 return NSS_STATUS_UNAVAIL;
275 int yperr = yp_match (domain, "group.byname", name, strlen (name), &result,
278 if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
280 enum nss_status retval = yperr2nss (yperr);
282 if (retval == NSS_STATUS_TRYAGAIN)
287 if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
291 return NSS_STATUS_TRYAGAIN;
294 char *p = strncpy (buffer, result, len);
300 int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
302 if (__builtin_expect (parse_res < 1, 0))
305 return NSS_STATUS_TRYAGAIN;
307 return NSS_STATUS_NOTFOUND;
309 return NSS_STATUS_SUCCESS;
313 _nss_nis_getgrgid_r (gid_t gid, struct group *grp,
314 char *buffer, size_t buflen, int *errnop)
317 if (__builtin_expect (yp_get_default_domain (&domain), 0))
318 return NSS_STATUS_UNAVAIL;
321 int nlen = sprintf (buf, "%lu", (unsigned long int) gid);
325 int yperr = yp_match (domain, "group.bygid", buf, nlen, &result, &len);
327 if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
329 enum nss_status retval = yperr2nss (yperr);
331 if (retval == NSS_STATUS_TRYAGAIN)
336 if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
340 return NSS_STATUS_TRYAGAIN;
343 char *p = strncpy (buffer, result, len);
349 int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
351 if (__builtin_expect (parse_res < 1, 0))
354 return NSS_STATUS_TRYAGAIN;
356 return NSS_STATUS_NOTFOUND;
358 return NSS_STATUS_SUCCESS;