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-rw-r--r--nis/nis_lookup.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/nis/nis_lookup.c b/nis/nis_lookup.c
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+++ b/nis/nis_lookup.c
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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 <rpcsvc/nislib.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 is_link = 1;	 /* We should go at least once in the while loop */
+  int count_links = 0;	 /* We will follow only 16 links in the deep */
+  int i;
+
+  res = calloc (1, sizeof (nis_result));
+
+  if (flags & EXPAND_NAME)
+    {
+      names = __nis_expandname (name);
+      if (names == NULL)
+	{
+	  res->status = NIS_NAMEUNREACHABLE;
+	  return res;
+	}
+
+      i = 0;
+      while (names[i] != NULL && (i == 0 || res->status > 1))
+	{
+	  req.ns_name = names[i];
+
+	  while (is_link)
+	    {
+	      req.ns_object.ns_object_len = 0;
+	      req.ns_object.ns_object_val = NULL;
+	      memset (res, '\0', sizeof (nis_result));
+
+	      if ((status = __do_niscall (NULL, 0, NIS_LOOKUP,
+					  (xdrproc_t) xdr_ns_request,
+					  (caddr_t) & req,
+					  (xdrproc_t) xdr_nis_result,
+				      (caddr_t) res, flags)) != RPC_SUCCESS)
+		{
+		  res->status = status;
+		  nis_freenames (names);
+		  return res;
+		}
+
+	      if ((res->status == NIS_SUCCESS || res->status == NIS_S_SUCCESS)
+		  && (res->objects.objects_len > 0 &&
+		      res->objects.objects_val->zo_data.zo_type == LINK_OBJ))
+		is_link = 1;
+	      else
+		is_link = 0;
+
+	      if (is_link)
+		{
+		  if ((flags & FOLLOW_LINKS) == FOLLOW_LINKS)
+		    {
+		      if (count_links == 16)
+			{
+			  res->status = NIS_LINKNAMEERROR;
+			  return res;
+			}
+		      else
+			++count_links;
+
+		      req.ns_name = res->objects.objects_val->LI_data.li_name;
+		    }
+		  else
+		    {
+		      res->status = NIS_NOTSEARCHABLE;
+		      return res;
+		    }
+		}
+	    }
+
+	  ++i;
+	  if (res->status == NIS_NOT_ME)
+	    res->status = NIS_NOSUCHNAME;
+	}
+
+      nis_freenames (names);
+    }
+  else
+    {
+      req.ns_name = (char *)name;
+
+      while (is_link)
+	{
+	  req.ns_object.ns_object_len = 0;
+	  req.ns_object.ns_object_val = NULL;
+	  memset (res, '\0', sizeof (nis_result));
+
+	  if ((status = __do_niscall (NULL, 0, NIS_LOOKUP,
+				      (xdrproc_t) xdr_ns_request,
+				      (caddr_t) &req,
+				      (xdrproc_t) xdr_nis_result,
+				      (caddr_t) res, flags)) != RPC_SUCCESS)
+	    {
+	      res->status = status;
+	      return res;
+	    }
+
+	  if ((res->status == NIS_SUCCESS || res->status == NIS_S_SUCCESS) &&
+	      (res->objects.objects_len > 0 &&
+	       res->objects.objects_val->zo_data.zo_type == LINK_OBJ))
+	    is_link = 1;
+	  else
+	    is_link = 0;
+
+	  if (is_link)
+	    {
+	      if ((flags & FOLLOW_LINKS) == FOLLOW_LINKS)
+		{
+		  if (count_links == 16)
+		    {
+		      res->status = NIS_LINKNAMEERROR;
+		      return res;
+		    }
+		  else
+		    ++count_links;
+
+		  req.ns_name = res->objects.objects_val->LI_data.li_name;
+		}
+	      else
+		{
+		  res->status = NIS_NOTSEARCHABLE;
+		  return res;
+		}
+	    }
+	}
+    }
+
+  return res;
+}