1 /* $NetBSD: yp_master.c,v 1.16 2024/01/03 18:41:53 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #if defined(LIBC_SCCS) && !defined(lint)
31 __RCSID("$NetBSD: yp_master.c,v 1.16 2024/01/03 18:41:53 christos Exp $");
32 #endif
33
34 #include "namespace.h"
35 #include <string.h>
36 #include <stdlib.h>
37 #include <rpc/rpc.h>
38 #include <rpcsvc/yp_prot.h>
39 #include <rpcsvc/ypclnt.h>
40 #include "local.h"
41
42 #ifdef __weak_alias
__weak_alias(yp_master,_yp_master)43 __weak_alias(yp_master,_yp_master)
44 #endif
45
46 int
47 yp_master(const char *indomain, const char *inmap, char **outname)
48 {
49 struct dom_binding *ysd;
50 struct ypresp_master yprm;
51 struct ypreq_nokey yprnk;
52 int r, nerrs = 0;
53
54 if (outname == NULL)
55 return YPERR_BADARGS;
56 *outname = NULL;
57
58 if (_yp_invalid_domain(indomain))
59 return YPERR_BADARGS;
60 if (inmap == NULL || *inmap == '\0'
61 || strlen(inmap) > YPMAXMAP)
62 return YPERR_BADARGS;
63
64 again:
65 if (_yp_dobind(indomain, &ysd) != 0)
66 return YPERR_DOMAIN;
67
68 yprnk.domain = indomain;
69 yprnk.map = inmap;
70
71 (void)memset(&yprm, 0, sizeof yprm);
72
73 r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_MASTER,
74 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
75 (xdrproc_t)xdr_ypresp_master, &yprm, _yplib_timeout);
76 if (r != RPC_SUCCESS) {
77 if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) {
78 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
79 nerrs = 0;
80 } else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries)
81 return YPERR_YPSERV;
82 ysd->dom_vers = -1;
83 goto again;
84 }
85 if (!(r = ypprot_err(yprm.status))) {
86 if ((*outname = strdup(yprm.master)) == NULL)
87 r = YPERR_RESRC;
88 }
89 xdr_free((xdrproc_t)xdr_ypresp_master, (char *)(void *)&yprm);
90 __yp_unbind(ysd);
91 if (r != 0) {
92 if (*outname) {
93 free(*outname);
94 *outname = NULL;
95 }
96 }
97 return r;
98 }
99