yp_master.c revision 1.7 
1/*	$NetBSD: yp_master.c,v 1.7 1997/07/13 20:28:13 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 1.7 1997/07/13 20:28:13 christos Exp $");
37#endif
38
39#include <string.h>
40#include <stdlib.h>
41#include <rpc/rpc.h>
42#include <rpcsvc/yp_prot.h>
43#include <rpcsvc/ypclnt.h>
44#include "local.h"
45
46extern struct timeval _yplib_timeout;
47extern int _yplib_nerrs;
48
49int
50yp_master(indomain, inmap, outname)
51	const char     *indomain;
52	const char     *inmap;
53	char          **outname;
54{
55	struct dom_binding *ysd;
56	struct ypresp_master yprm;
57	struct ypreq_nokey yprnk;
58	int r, nerrs = 0;
59
60	if (outname == NULL)
61		return YPERR_BADARGS;
62	*outname = NULL;
63
64	if (_yp_invalid_domain(indomain))
65		return YPERR_BADARGS;
66	if (inmap == NULL || *inmap == '\0'
67	    || strlen(inmap) > YPMAXMAP)
68		return YPERR_BADARGS;
69
70again:
71	if (_yp_dobind(indomain, &ysd) != 0)
72		return YPERR_DOMAIN;
73
74	yprnk.domain = indomain;
75	yprnk.map = inmap;
76
77	(void)memset(&yprm, 0, sizeof yprm);
78
79	r = clnt_call(ysd->dom_client, YPPROC_MASTER,
80		      xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm,
81		      _yplib_timeout);
82	if (r != RPC_SUCCESS) {
83		if (++nerrs == _yplib_nerrs) {
84			clnt_perror(ysd->dom_client, "yp_master: clnt_call");
85			nerrs = 0;
86		}
87		ysd->dom_vers = -1;
88		goto again;
89	}
90	if (!(r = ypprot_err(yprm.status))) {
91		if ((*outname = strdup(yprm.master)) == NULL)
92			r = YPERR_RESRC;
93	}
94	xdr_free(xdr_ypresp_master, (char *) &yprm);
95	_yp_unbind(ysd);
96	if (r != 0) {
97		if (*outname) {
98			free(*outname);
99			*outname = NULL;
100		}
101	}
102	return r;
103}
104