yppoll.c revision 330449 
1/*	$OpenBSD: yppoll.c,v 1.15 2015/01/16 06:40:22 deraadt Exp $ */
2/*	$NetBSD: yppoll.c,v 1.5 1996/05/13 02:46:36 thorpej Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@openbsd.org>
8 * Copyright (c) 1992, 1993 John Brezak
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
24 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
27 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: stable/11/usr.sbin/yppoll/yppoll.c 330449 2018-03-05 07:26:05Z eadler $");
38
39#include <sys/param.h>
40#include <sys/types.h>
41#include <sys/socket.h>
42
43#include <arpa/inet.h>
44#include <netinet/in.h>
45
46#include <ctype.h>
47#include <err.h>
48#include <netdb.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <time.h>
53#include <unistd.h>
54
55#include <rpc/rpc.h>
56#include <rpc/xdr.h>
57#include <rpcsvc/yp_prot.h>
58#include <rpcsvc/ypclnt.h>
59
60static void
61usage(void)
62{
63	fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n");
64	exit(1);
65}
66
67static int
68get_remote_info(char *indomain, char *inmap, char *server, int *outorder,
69    char **outname)
70{
71	struct ypresp_order ypro;
72	struct ypresp_master yprm;
73	struct ypreq_nokey yprnk;
74	struct timeval tv;
75	struct sockaddr_in rsrv_sin;
76	int rsrv_sock;
77	CLIENT *client;
78	struct hostent *h;
79	int r;
80
81	bzero((char *)&rsrv_sin, sizeof rsrv_sin);
82	rsrv_sin.sin_len = sizeof rsrv_sin;
83	rsrv_sin.sin_family = AF_INET;
84	rsrv_sock = RPC_ANYSOCK;
85
86	h = gethostbyname(server);
87	if (h == NULL) {
88		if (inet_aton(server, &rsrv_sin.sin_addr) == 0)
89			errx(1, "unknown host %s.", server);
90	} else
91		rsrv_sin.sin_addr.s_addr = *(u_int32_t *)h->h_addr;
92
93	tv.tv_sec = 10;
94	tv.tv_usec = 0;
95
96	client = clntudp_create(&rsrv_sin, YPPROG, YPVERS, tv, &rsrv_sock);
97	if (client == NULL)
98		errx(1, "clntudp_create: no contact with host %s.", server);
99
100	yprnk.domain = indomain;
101	yprnk.map = inmap;
102
103	bzero((char *)(char *)&ypro, sizeof ypro);
104
105	r = clnt_call(client, YPPROC_ORDER, (xdrproc_t)xdr_ypreq_nokey, &yprnk,
106	    (xdrproc_t)xdr_ypresp_order, &ypro, tv);
107	if (r != RPC_SUCCESS)
108		clnt_perror(client, "yp_order: clnt_call");
109
110	*outorder = ypro.ordernum;
111	xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro);
112
113	r = ypprot_err(ypro.status);
114	if (r == RPC_SUCCESS) {
115		bzero((char *)&yprm, sizeof yprm);
116
117		r = clnt_call(client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey,
118		    &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv);
119		if (r != RPC_SUCCESS)
120			clnt_perror(client, "yp_master: clnt_call");
121		r = ypprot_err(yprm.status);
122		if (r == 0)
123			*outname = (char *)strdup(yprm.master);
124		xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm);
125	}
126	clnt_destroy(client);
127	return (r);
128}
129
130int
131main(int argc, char *argv[])
132{
133	char *domainname, *hostname = NULL, *inmap, *master;
134	int order, c, r;
135	time_t torder;
136
137	yp_get_default_domain(&domainname);
138
139	while ((c = getopt(argc, argv, "h:d:")) != -1)
140		switch (c) {
141		case 'd':
142			domainname = optarg;
143			break;
144		case 'h':
145			hostname = optarg;
146			break;
147		default:
148			usage();
149			/*NOTREACHED*/
150		}
151
152	if (optind + 1 != argc)
153		usage();
154	inmap = argv[optind];
155
156	if (hostname != NULL) {
157		r = get_remote_info(domainname, inmap, hostname,
158		    &order, &master);
159	} else {
160		r = yp_order(domainname, inmap, &order);
161		if (r == 0)
162			r = yp_master(domainname, inmap, &master);
163	}
164
165	if (r != 0)
166		errx(1, "no such map %s: reason: %s",
167		    inmap, yperr_string(r));
168
169	torder = order;
170	printf("Map %s has order number %lld. %s", inmap,
171	    (long long)order, ctime(&torder));
172	printf("The master server is %s.\n", master);
173
174	exit(0);
175}
176