1 /* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
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.
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
14 Lesser General Public License for more details.
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
27 #include <bits/libc-lock.h>
28 #include <rpcsvc/nis.h>
30 #include "nss-nisplus.h"
31 #include "nisplus-parser.h"
33 #include <nis_intern.h>
37 __libc_lock_define_initialized (static, lock);
39 /* Connection information. */
40 static ib_request *ibreq;
41 static directory_obj *dir;
42 static dir_binding bptr;
43 static char *tablepath;
44 static char *tableptr;
49 nis_name grp_tablename_val attribute_hidden;
50 size_t grp_tablename_len attribute_hidden;
53 _nss_grp_create_tablename (int *errnop)
55 if (grp_tablename_val == NULL)
57 const char *local_dir = nis_local_directory ();
58 size_t local_dir_len = strlen (local_dir);
59 static const char prefix[] = "group.org_dir.";
61 char *p = malloc (sizeof (prefix) + local_dir_len);
65 return NSS_STATUS_TRYAGAIN;
68 memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
70 grp_tablename_len = sizeof (prefix) - 1 + local_dir_len;
72 atomic_write_barrier ();
74 if (atomic_compare_and_exchange_bool_acq (&grp_tablename_val, p, NULL))
76 /* Another thread already installed the value. */
78 grp_tablename_len = strlen (grp_tablename_val);
82 return NSS_STATUS_SUCCESS;
87 internal_endgrent (void)
89 __nisbind_destroy (&bptr);
90 memset (&bptr, '\0', sizeof (bptr));
92 nis_free_directory (dir);
95 nis_free_request (ibreq);
98 xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor);
99 memset (&cursor, '\0', sizeof (cursor));
102 tableptr = tablepath = NULL;
106 static enum nss_status
107 internal_setgrent (int *errnop)
109 enum nss_status status = NSS_STATUS_SUCCESS;
111 if (grp_tablename_val == NULL)
112 status = _nss_grp_create_tablename (errnop);
114 if (status == NSS_STATUS_SUCCESS)
116 ibreq = __create_ib_request (grp_tablename_val, 0);
120 return NSS_STATUS_TRYAGAIN;
123 nis_error retcode = __prepare_niscall (grp_tablename_val, &dir, &bptr, 0);
124 if (retcode != NIS_SUCCESS)
126 nis_free_request (ibreq);
128 status = niserr2nss (retcode);
137 _nss_nisplus_setgrent (int stayopen)
139 enum nss_status status;
141 __libc_lock_lock (lock);
143 internal_endgrent ();
145 // XXX We need to be able to set errno. Pass in new parameter.
147 status = internal_setgrent (&err);
149 __libc_lock_unlock (lock);
156 _nss_nisplus_endgrent (void)
158 __libc_lock_lock (lock);
160 internal_endgrent ();
162 __libc_lock_unlock (lock);
164 return NSS_STATUS_SUCCESS;
168 static enum nss_status
169 internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen,
173 enum nss_status retval = NSS_STATUS_SUCCESS;
175 /* Get the next entry until we found a correct one. */
180 memset (&result, '\0', sizeof (result));
182 if (cursor.n_bytes == NULL)
186 retval = internal_setgrent (errnop);
187 if (retval != NSS_STATUS_SUCCESS)
191 status = __do_niscall3 (&bptr, NIS_IBFIRST,
192 (xdrproc_t) _xdr_ib_request,
194 (xdrproc_t) _xdr_nis_result,
200 ibreq->ibr_cookie.n_bytes = cursor.n_bytes;
201 ibreq->ibr_cookie.n_len = cursor.n_len;
203 status = __do_niscall3 (&bptr, NIS_IBNEXT,
204 (xdrproc_t) _xdr_ib_request,
206 (xdrproc_t) _xdr_nis_result,
210 ibreq->ibr_cookie.n_bytes = NULL;
211 ibreq->ibr_cookie.n_len = 0;
214 if (status != NIS_SUCCESS)
215 return niserr2nss (status);
217 if (NIS_RES_STATUS (&result) == NIS_NOTFOUND)
219 /* No more entries on this server. This means we have to go
220 to the next server on the path. */
221 status = __follow_path (&tablepath, &tableptr, ibreq, &bptr);
222 if (status != NIS_SUCCESS)
223 return niserr2nss (status);
225 directory_obj *newdir = NULL;
227 status = __prepare_niscall (ibreq->ibr_name, &newdir, &newbptr, 0);
228 if (status != NIS_SUCCESS)
229 return niserr2nss (status);
231 nis_free_directory (dir);
233 __nisbind_destroy (&bptr);
236 xdr_free ((xdrproc_t) xdr_netobj, (char *) &result.cookie);
237 result.cookie.n_bytes = NULL;
238 result.cookie.n_len = 0;
242 else if (NIS_RES_STATUS (&result) != NIS_SUCCESS)
243 return niserr2nss (NIS_RES_STATUS (&result));
245 parse_res = _nss_nisplus_parse_grent (&result, gr,
246 buffer, buflen, errnop);
247 if (__builtin_expect (parse_res == -1, 0))
250 retval = NSS_STATUS_TRYAGAIN;
255 /* Free the old cursor. */
256 xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor);
257 /* Remember the new one. */
258 cursor.n_bytes = result.cookie.n_bytes;
259 cursor.n_len = result.cookie.n_len;
260 /* Free the result structure. NB: we do not remove the cookie. */
261 result.cookie.n_bytes = NULL;
262 result.cookie.n_len = 0;
264 xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &result);
265 memset (&result, '\0', sizeof (result));
273 _nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen,
278 __libc_lock_lock (lock);
280 status = internal_nisplus_getgrent_r (result, buffer, buflen, errnop);
282 __libc_lock_unlock (lock);
288 _nss_nisplus_getgrnam_r (const char *name, struct group *gr,
289 char *buffer, size_t buflen, int *errnop)
293 if (grp_tablename_val == NULL)
295 enum nss_status status = _nss_grp_create_tablename (errnop);
297 if (status != NSS_STATUS_SUCCESS)
304 return NSS_STATUS_NOTFOUND;
308 char buf[strlen (name) + 9 + grp_tablename_len];
311 snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val);
313 result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
318 return NSS_STATUS_TRYAGAIN;
321 if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
323 enum nss_status status = niserr2nss (result->status);
325 nis_freeresult (result);
329 parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
330 nis_freeresult (result);
331 if (__builtin_expect (parse_res < 1, 0))
336 return NSS_STATUS_TRYAGAIN;
340 __set_errno (olderr);
341 return NSS_STATUS_NOTFOUND;
345 return NSS_STATUS_SUCCESS;
349 _nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr,
350 char *buffer, size_t buflen, int *errnop)
352 if (grp_tablename_val == NULL)
354 enum nss_status status = _nss_grp_create_tablename (errnop);
356 if (status != NSS_STATUS_SUCCESS)
362 char buf[8 + 3 * sizeof (unsigned long int) + grp_tablename_len];
365 snprintf (buf, sizeof (buf), "[gid=%lu],%s",
366 (unsigned long int) gid, grp_tablename_val);
368 result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
373 return NSS_STATUS_TRYAGAIN;
376 if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
378 enum nss_status status = niserr2nss (result->status);
380 __set_errno (olderr);
382 nis_freeresult (result);
386 parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
388 nis_freeresult (result);
389 if (__builtin_expect (parse_res < 1, 0))
391 __set_errno (olderr);
396 return NSS_STATUS_TRYAGAIN;
399 return NSS_STATUS_NOTFOUND;
402 return NSS_STATUS_SUCCESS;