yp_master.c revision 1.5 
1/*	$NetBSD: yp_master.c,v 1.5 1997/05/21 06:55:25 lukem Exp $	 */
2
3/*
4 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Theo de Raadt.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char rcsid[] = "$NetBSD: yp_master.c,v 1.5 1997/05/21 06:55:25 lukem Exp $";
36#endif
37
38#include <string.h>
39#include <rpc/rpc.h>
40#include <rpcsvc/yp_prot.h>
41#include <rpcsvc/ypclnt.h>
42
43extern struct timeval _yplib_timeout;
44extern int _yplib_nerrs;
45
46int
47yp_master(indomain, inmap, outname)
48	const char     *indomain;
49	const char     *inmap;
50	char          **outname;
51{
52	struct dom_binding *ysd;
53	struct ypresp_master yprm;
54	struct ypreq_nokey yprnk;
55	int r, nerrs = 0;
56
57	if (outname == NULL)
58		return YPERR_BADARGS;
59	*outname = NULL;
60
61	if (indomain == NULL || *indomain == '\0'
62	    || strlen(indomain) > YPMAXDOMAIN)
63		return YPERR_BADARGS;
64	if (inmap == NULL || *inmap == '\0'
65	    || strlen(inmap) > YPMAXMAP)
66		return YPERR_BADARGS;
67
68again:
69	if (_yp_dobind(indomain, &ysd) != 0)
70		return YPERR_DOMAIN;
71
72	yprnk.domain = indomain;
73	yprnk.map = inmap;
74
75	(void)memset(&yprm, 0, sizeof yprm);
76
77	r = clnt_call(ysd->dom_client, YPPROC_MASTER,
78		      xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm,
79		      _yplib_timeout);
80	if (r != RPC_SUCCESS) {
81		if (++nerrs == _yplib_nerrs) {
82			clnt_perror(ysd->dom_client, "yp_master: clnt_call");
83			nerrs = 0;
84		}
85		ysd->dom_vers = -1;
86		goto again;
87	}
88	if (!(r = ypprot_err(yprm.status))) {
89		if ((*outname = strdup(yprm.master)) == NULL)
90			r = YPERR_RESRC;
91	}
92	xdr_free(xdr_ypresp_master, (char *) &yprm);
93	_yp_unbind(ysd);
94	if (r != 0) {
95		if (*outname) {
96			free(*outname);
97			*outname = NULL;
98		}
99	}
100	return r;
101}
102