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/* Copyright (C) 1997 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.
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.
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. */
#include <string.h>
#include <rpcsvc/nis.h>
#include "nis_intern.h"
nis_result *
nis_lookup (const_nis_name name, const u_long flags)
{
nis_result *res;
struct ns_request req;
nis_name *names;
nis_error status;
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 (flags & EXPAND_NAME)
{
names = nis_getnames (name);
if (names == NULL)
{
res->status = NIS_NAMEUNREACHABLE;
return res;
}
}
else
{
names = namebuf;
names[0] = (nis_name) name;
}
req.ns_name = names[0];
while (!done)
{
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);
if (status != NIS_SUCCESS)
res->status = status;
switch (res->status)
{
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)
{
res->status = 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));
}
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 */
++done;
break;
default:
/* Try the next domainname if we don't follow a link */
if (count_links)
{
free (req.ns_name);
res->status = NIS_LINKNAMEERROR;
++done;
break;
}
++name_nr;
if (names[name_nr] == NULL)
{
++done;
break;
}
req.ns_name = names[name_nr];
break;
}
}
if (names != namebuf)
nis_freenames (names);
return res;
}
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