yp_master.c revision 1.9 
1/*	$NetBSD: yp_master.c,v 1.9 1998/11/15 17:10:31 christos 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#include <sys/cdefs.h>
35#if defined(LIBC_SCCS) && !defined(lint)
36__RCSID("$NetBSD: yp_master.c,v 1.9 1998/11/15 17:10:31 christos Exp $");
37#endif
38
39#include "namespace.h"
40#include <string.h>
41#include <stdlib.h>
42#include <rpc/rpc.h>
43#include <rpcsvc/yp_prot.h>
44#include <rpcsvc/ypclnt.h>
45#include "local.h"
46
47extern struct timeval _yplib_timeout;
48extern int _yplib_nerrs;
49
50#ifdef __weak_alias
51__weak_alias(yp_master,_yp_master);
52#endif
53
54int
55yp_master(indomain, inmap, outname)
56	const char     *indomain;
57	const char     *inmap;
58	char          **outname;
59{
60	struct dom_binding *ysd;
61	struct ypresp_master yprm;
62	struct ypreq_nokey yprnk;
63	int r, nerrs = 0;
64
65	if (outname == NULL)
66		return YPERR_BADARGS;
67	*outname = NULL;
68
69	if (_yp_invalid_domain(indomain))
70		return YPERR_BADARGS;
71	if (inmap == NULL || *inmap == '\0'
72	    || strlen(inmap) > YPMAXMAP)
73		return YPERR_BADARGS;
74
75again:
76	if (_yp_dobind(indomain, &ysd) != 0)
77		return YPERR_DOMAIN;
78
79	yprnk.domain = indomain;
80	yprnk.map = inmap;
81
82	(void)memset(&yprm, 0, sizeof yprm);
83
84	r = clnt_call(ysd->dom_client, YPPROC_MASTER,
85		      xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm,
86		      _yplib_timeout);
87	if (r != RPC_SUCCESS) {
88		if (++nerrs == _yplib_nerrs) {
89			clnt_perror(ysd->dom_client, "yp_master: clnt_call");
90			nerrs = 0;
91		}
92		ysd->dom_vers = -1;
93		goto again;
94	}
95	if (!(r = ypprot_err(yprm.status))) {
96		if ((*outname = strdup(yprm.master)) == NULL)
97			r = YPERR_RESRC;
98	}
99	xdr_free(xdr_ypresp_master, (char *)(void *)&yprm);
100	__yp_unbind(ysd);
101	if (r != 0) {
102		if (*outname) {
103			free(*outname);
104			*outname = NULL;
105		}
106	}
107	return r;
108}
109