text: /*
   * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   *
   * @APPLE_LICENSE_HEADER_START@
   * 
   * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   * Reserved.  This file contains Original Code and/or Modifications of
   * Original Code as defined in and that are subject to the Apple Public
   * Source License Version 1.1 (the "License").  You may not use this file
   * except in compliance with the License.  Please obtain a copy of the
   * License at http://www.apple.com/publicsource and read it before using
   * this file.
   * 
   * The Original Code and all software distributed under the License are
   * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
   * License for the specific language governing rights and limitations
   * under the License.
   * 
   * @APPLE_LICENSE_HEADER_END@
   */
  /*
   * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by Theo de Raadt.
   * 4. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  static char *rcsid = "$OpenBSD: yp_first.c,v 1.5 1996/12/03 08:20:03 deraadt Exp $";
  #endif /* LIBC_SCCS and not lint */
  
  #include <sys/param.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <sys/file.h>
  #include <sys/uio.h>
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include <rpc/rpc.h>
  #include <rpc/xdr.h>
  #include <rpcsvc/yp.h>
  #include <rpcsvc/ypclnt.h>
  #include "ypinternal.h"
  
  int
  yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
  	const char     *indomain;
  	const char     *inmap;
  	char          **outkey;
  	int            *outkeylen;
  	char          **outval;
  	int            *outvallen;
  {
  	struct ypresp_key_val yprkv;
  	struct ypreq_nokey yprnk;
  	struct dom_binding *ysd;
  	struct timeval  tv;
  	int tries = 0, r;
  	static int proto = YP_BIND_UDP;
  
  	if (indomain == NULL || *indomain == '\0' ||
  	    strlen(indomain) > YPMAXDOMAIN || inmap == NULL ||
  	    *inmap == '\0' || strlen(inmap) > YPMAXMAP)
  		return YPERR_BADARGS;
  
  	*outkey = *outval = NULL;
  	*outkeylen = *outvallen = 0;
  
  again:
  	if (_yp_dobind(indomain, &ysd) != 0)
  		return YPERR_DOMAIN;
  
  	tv.tv_sec = _yplib_timeout;
  	tv.tv_usec = 0;
  
  	yprnk.domain = (char *)indomain;
  	yprnk.map = (char *)inmap;
  	(void)memset(&yprkv, 0, sizeof yprkv);
  
  	r = clnt_call(ysd->dom_client, YPPROC_FIRST, (xdrproc_t)xdr_ypreq_nokey, &yprnk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
  	if (r != RPC_SUCCESS)
  	{
  		if (tries++) clnt_perror(ysd->dom_client, "yp_first: clnt_call");
  
  		if (proto == YP_BIND_UDP) proto = YP_BIND_TCP;
  		else proto = YP_BIND_UDP;
  		ysd->dom_vers = proto;
  
  		goto again;
  	}
  
  	if (!(r = ypprot_err(yprkv.stat))) {
  		*outkeylen = yprkv.key.keydat_len;
  		if ((*outkey = malloc(*outkeylen + 1)) == NULL)
  			r = YPERR_RESRC;
  		else {
  			(void)memcpy(*outkey, yprkv.key.keydat_val, *outkeylen);
  			(*outkey)[*outkeylen] = '\0';
  		}
  		*outvallen = yprkv.val.valdat_len;
  		if ((*outval = malloc(*outvallen + 1)) == NULL)
  			r = YPERR_RESRC;
  		else {
  			(void)memcpy(*outval, yprkv.val.valdat_val, *outvallen);
  			(*outval)[*outvallen] = '\0';
  		}
  	}
  	xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *) &yprkv);
  	_yp_unbind(ysd);
  	return r;
  }
  