-/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1997-1999, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <string.h>
#include <rpcsvc/nis.h>
#include "nis_xdr.h"
#include "nis_intern.h"
+#include <libnsl.h>
+
nis_result *
-nis_lookup (const_nis_name name, const u_long flags)
+nis_lookup (const_nis_name name, const unsigned int flags)
{
- nis_result *res;
+ nis_result *res = calloc (1, sizeof (nis_result));
struct ns_request req;
nis_name *names;
nis_error status;
+ int link_first_try = 0;
int count_links = 0; /* We will follow only 16 links in the deep */
int done = 0;
int name_nr = 0;
nis_name namebuf[2] = {NULL, NULL};
- res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
- if (flags & EXPAND_NAME)
+ if ((flags & EXPAND_NAME) && (name[strlen (name) - 1] != '.'))
{
names = nis_getnames (name);
if (names == NULL)
req.ns_name = names[0];
while (!done)
{
+ dir_binding bptr;
+ directory_obj *dir = NULL;
req.ns_object.ns_object_len = 0;
req.ns_object.ns_object_val = NULL;
- memset (res, '\0', sizeof (nis_result));
- status = __do_niscall (req.ns_name, NIS_LOOKUP,
- (xdrproc_t) _xdr_ns_request,
- (caddr_t) & req,
- (xdrproc_t) _xdr_nis_result,
- (caddr_t) res, flags, NULL);
+ status = __prepare_niscall (req.ns_name, &dir, &bptr, flags);
+ if (__builtin_expect (status != NIS_SUCCESS, 0))
+ {
+ NIS_RES_STATUS (res) = status;
+ goto out;
+ }
+
+ do
+ {
+ static const struct timeval RPCTIMEOUT = {10, 0};
+ enum clnt_stat result;
+
+ again:
+ result = clnt_call (bptr.clnt, NIS_LOOKUP,
+ (xdrproc_t) _xdr_ns_request,
+ (caddr_t) &req, (xdrproc_t) _xdr_nis_result,
+ (caddr_t) res, RPCTIMEOUT);
+
+ if (result != RPC_SUCCESS)
+ status = NIS_RPCERROR;
+ else
+ {
+ status = NIS_SUCCESS;
+
+ if (NIS_RES_STATUS (res) == NIS_SUCCESS)
+ {
+ if (__type_of (NIS_RES_OBJECT (res)) == NIS_LINK_OBJ
+ && (flags & FOLLOW_LINKS)) /* We are following links */
+ {
+ /* if we hit the link limit, bail */
+ if (count_links > NIS_MAXLINKS)
+ {
+ NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
+ break;
+ }
+ ++count_links;
+ req.ns_name =
+ strdupa (NIS_RES_OBJECT (res)->LI_data.li_name);
+
+ /* The following is a non-obvious optimization. A
+ nis_freeresult call would call xdr_free as the
+ following code. But it also would unnecessarily
+ free the result structure. We avoid this here
+ along with the necessary tests. */
+ xdr_free ((xdrproc_t) _xdr_nis_result, (char *) res);
+ memset (res, '\0', sizeof (*res));
+
+ link_first_try = 1; /* Try at first the old binding */
+ goto again;
+ }
+ }
+ else
+ if (NIS_RES_STATUS (res) == NIS_SYSTEMERROR
+ || NIS_RES_STATUS (res) == NIS_NOSUCHNAME
+ || NIS_RES_STATUS (res) == NIS_NOT_ME)
+ {
+ if (link_first_try)
+ {
+ __nisbind_destroy (&bptr);
+ nis_free_directory (dir);
+ /* Otherwise __nisfind_server will not do anything. */
+ dir = NULL;
+
+ if (__nisfind_server (req.ns_name, 1, &dir, &bptr,
+ flags & ~MASTER_ONLY)
+ != NIS_SUCCESS)
+ goto out;
+ }
+ else
+ if (__nisbind_next (&bptr) != NIS_SUCCESS)
+ {
+ /* No more servers to search. Try parent. */
+ const char *ndomain = __nis_domain_of (req.ns_name);
+ req.ns_name = strdupa (ndomain);
+ if (strcmp (req.ns_name, ".") == 0)
+ {
+ NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
+ goto out;
+ }
+
+ __nisbind_destroy (&bptr);
+ nis_free_directory (dir);
+ dir = NULL;
+ status = __prepare_niscall (req.ns_name, &dir,
+ &bptr, flags);
+ if (__builtin_expect (status != NIS_SUCCESS, 0))
+ {
+ NIS_RES_STATUS (res) = status;
+ goto out;
+ }
+ goto again;
+ }
+
+ while (__nisbind_connect (&bptr) != NIS_SUCCESS)
+ {
+ if (__nisbind_next (&bptr) != NIS_SUCCESS)
+ {
+ nis_free_directory (dir);
+ goto out;
+ }
+ }
+ goto again;
+ }
+ break;
+ }
+ link_first_try = 0; /* Set it back */
+ }
+ while ((flags & HARD_LOOKUP) && status == NIS_RPCERROR);
+
+ __nisbind_destroy (&bptr);
+ nis_free_directory (dir);
+
if (status != NIS_SUCCESS)
- NIS_RES_STATUS (res) = status;
+ {
+ NIS_RES_STATUS (res) = status;
+ goto out;
+ }
switch (NIS_RES_STATUS (res))
{
case NIS_PARTIAL:
case NIS_SUCCESS:
case NIS_S_SUCCESS:
- if (__type_of(NIS_RES_OBJECT (res)) == NIS_LINK_OBJ &&
- flags & FOLLOW_LINKS) /* We are following links */
- {
- /* if we hit the link limit, bail */
- if (count_links > NIS_MAXLINKS)
- {
- NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
- ++done;
- break;
- }
- if (count_links)
- free (req.ns_name);
- ++count_links;
- req.ns_name = strdup (NIS_RES_OBJECT (res)->LI_data.li_name);
- nis_freeresult (res);
- res = calloc (1, sizeof (nis_result));
- if (res == NULL)
- return NULL;
- }
- else
- ++done;
- break;
- case NIS_CBRESULTS:
- /* The callback is handled in __do_niscall2 */
- ++done;
- break;
- case NIS_UNAVAIL:
- /* NIS+ is not installed, or all servers are down */
+ case NIS_LINKNAMEERROR: /* We follow to max links */
+ case NIS_UNAVAIL: /* NIS+ is not installed, or all servers are down */
++done;
break;
default:
}
}
+ out:
if (names != namebuf)
nis_freenames (names);
return res;
}
+libnsl_hidden_def (nis_lookup)
projects / thirdparty / glibc.git / blobdiff