ypwhich.c revision 91377 
1/*
2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote
14 *    products derived from this software without specific prior written
15 *    permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/usr.bin/ypwhich/ypwhich.c 91377 2002-02-27 14:32:43Z dwmalone $");
32
33#include <sys/param.h>
34#include <sys/types.h>
35#include <sys/socket.h>
36
37#include <rpcsvc/ypclnt.h>
38
39#include <netinet/in.h>
40
41#include <arpa/inet.h>
42
43#include <ctype.h>
44#include <err.h>
45#include <netdb.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <unistd.h>
50#include <rpc/rpc.h>
51#include <rpc/xdr.h>
52#include <rpcsvc/yp.h>
53struct dom_binding{};
54
55#define ERR_USAGE	1	/* bad arguments - display 'usage' message */
56#define ERR_NOSUCHHOST	2	/* no such host */
57#define ERR_NOBINDING	3	/* error from ypbind -- domain not bound */
58#define ERR_NOYPBIND	4	/* ypbind not running */
59#define ERR_NOMASTER	5	/* could not find master server */
60
61extern bool_t xdr_domainname();
62
63struct ypalias {
64	const char *alias, *name;
65} ypaliases[] = {
66	{ "passwd", "passwd.byname" },
67	{ "master.passwd", "master.passwd.byname" },
68	{ "group", "group.byname" },
69	{ "networks", "networks.byaddr" },
70	{ "hosts", "hosts.byaddr" },
71	{ "protocols", "protocols.bynumber" },
72	{ "services", "services.byname" },
73	{ "aliases", "mail.aliases" },
74	{ "ethers", "ethers.byname" },
75};
76
77static void
78usage(void)
79{
80	fprintf(stderr, "%s\n%s\n",
81		"usage: ypwhich [-d domain] [[-t] -m [mname] | host]",
82		"       ypwhich -x");
83	exit(ERR_USAGE);
84}
85
86
87/*
88 * Like yp_bind except can query a specific host
89 */
90static int
91bind_host(char *dom, struct sockaddr_in *lsin)
92{
93	struct hostent *hent = NULL;
94	struct ypbind_resp ypbr;
95	struct timeval tv;
96	CLIENT *client;
97	int sock, r;
98	struct in_addr ss_addr;
99
100	sock = RPC_ANYSOCK;
101	tv.tv_sec = 15;
102	tv.tv_usec = 0;
103	client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock);
104	if (client == NULL) {
105		warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND));
106		return (YPERR_YPBIND);
107	}
108
109	tv.tv_sec = 5;
110	tv.tv_usec = 0;
111	r = clnt_call(client, YPBINDPROC_DOMAIN,
112		xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv);
113	if (r != RPC_SUCCESS) {
114		warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
115		clnt_destroy(client);
116		return (YPERR_YPBIND);
117	} else {
118		if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
119			warnx("can't yp_bind: reason: %s",
120				ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error));
121			clnt_destroy(client);
122			return (r);
123		}
124	}
125	clnt_destroy(client);
126
127	ss_addr = *(struct in_addr *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
128	/*printf("%08x\n", ss_addr);*/
129	hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET);
130	if (hent)
131		printf("%s\n", hent->h_name);
132	else
133		printf("%s\n", inet_ntoa(ss_addr));
134	return (0);
135}
136
137int
138main(int argc, char *argv[])
139{
140	char *domnam = NULL, *master;
141	const char *map = NULL;
142	struct ypmaplist *ypml, *y;
143	struct hostent *hent;
144	struct sockaddr_in lsin;
145	int notrans, mode, getmap;
146	int c, r;
147	u_int i;
148
149	getmap = notrans = mode = 0;
150	while ((c = getopt(argc, argv, "xd:mt")) != -1)
151		switch (c) {
152		case 'x':
153			for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
154				printf("\"%s\" is an alias for \"%s\"\n",
155					ypaliases[i].alias,
156					ypaliases[i].name);
157			exit(0);
158		case 'd':
159			domnam = optarg;
160			break;
161		case 't':
162			notrans++;
163			break;
164		case 'm':
165			mode++;
166			break;
167		default:
168			usage();
169		}
170
171	if (!domnam)
172		yp_get_default_domain(&domnam);
173
174	if (mode == 0) {
175		switch (argc-optind) {
176		case 0:
177			bzero(&lsin, sizeof lsin);
178			lsin.sin_family = AF_INET;
179			lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
180
181			if (bind_host(domnam, &lsin))
182				exit(ERR_NOBINDING);
183			break;
184		case 1:
185			bzero(&lsin, sizeof lsin);
186			lsin.sin_family = AF_INET;
187			if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) {
188				hent = gethostbyname(argv[optind]);
189				if (!hent)
190					errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
191				bcopy((char *)hent->h_addr_list[0],
192					(char *)&lsin.sin_addr, sizeof lsin.sin_addr);
193			}
194			if (bind_host(domnam, &lsin))
195				exit(ERR_NOBINDING);
196			break;
197		default:
198			usage();
199		}
200		exit(0);
201	}
202
203	if (argc-optind > 1)
204		usage();
205
206	if (argv[optind]) {
207		map = argv[optind];
208		for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
209			if (strcmp(map, ypaliases[i].alias) == 0)
210				map = ypaliases[i].name;
211		r = yp_master(domnam, map, &master);
212		switch (r) {
213		case 0:
214			printf("%s\n", master);
215			free(master);
216			break;
217		case YPERR_YPBIND:
218			errx(ERR_NOYPBIND, "not running ypbind");
219		default:
220			errx(ERR_NOMASTER, "can't find master for map %s. reason: %s",
221				map, yperr_string(r));
222		}
223		exit(0);
224	}
225
226	ypml = NULL;
227	r = yp_maplist(domnam, &ypml);
228	switch (r) {
229	case 0:
230		for (y = ypml; y;) {
231			ypml = y;
232			r = yp_master(domnam, ypml->map, &master);
233			switch (r) {
234			case 0:
235				printf("%s %s\n", ypml->map, master);
236				free(master);
237				break;
238			default:
239				warnx("can't find the master of %s: reason: %s",
240					ypml->map, yperr_string(r));
241				break;
242			}
243			y = ypml->next;
244			free(ypml);
245		}
246		break;
247	case YPERR_YPBIND:
248		errx(ERR_NOYPBIND, "not running ypbind");
249	default:
250		errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s",
251			domnam, yperr_string(r));
252	}
253	exit(0);
254}
255