ypwhich.c revision 50477 
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#ifndef lint
31static const char rcsid[] =
32  "$FreeBSD: head/usr.bin/ypwhich/ypwhich.c 50477 1999-08-28 01:08:13Z peter $";
33#endif /* not lint */
34
35#include <sys/param.h>
36#include <sys/types.h>
37#include <sys/socket.h>
38#include <netinet/in.h>
39#include <arpa/inet.h>
40#include <ctype.h>
41#include <err.h>
42#include <netdb.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47#include <rpc/rpc.h>
48#include <rpc/xdr.h>
49#include <rpcsvc/yp.h>
50struct dom_binding{};
51#include <rpcsvc/ypclnt.h>
52
53#define ERR_USAGE	1	/* bad arguments - display 'usage' message */
54#define ERR_NOSUCHHOST	2	/* no such host */
55#define ERR_NOBINDING	3	/* error from ypbind -- domain not bound */
56#define ERR_NOYPBIND	4	/* ypbind not running */
57#define ERR_NOMASTER	5	/* could not find master server */
58
59extern bool_t xdr_domainname();
60
61struct ypalias {
62	char *alias, *name;
63} ypaliases[] = {
64	{ "passwd", "passwd.byname" },
65	{ "master.passwd", "master.passwd.byname" },
66	{ "group", "group.byname" },
67	{ "networks", "networks.byaddr" },
68	{ "hosts", "hosts.byaddr" },
69	{ "protocols", "protocols.bynumber" },
70	{ "services", "services.byname" },
71	{ "aliases", "mail.aliases" },
72	{ "ethers", "ethers.byname" },
73};
74
75static void
76usage()
77{
78	fprintf(stderr, "%s\n%s\n",
79		"usage: ypwhich [-d domain] [[-t] -m [mname] | host]",
80		"       ypwhich -x");
81	exit(ERR_USAGE);
82}
83
84
85/*
86 * Like yp_bind except can query a specific host
87 */
88int
89bind_host(dom, sin)
90char *dom;
91struct sockaddr_in *sin;
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(sin, 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(argc, argv)
139char **argv;
140{
141	char *domainname = NULL, *master, *map = NULL;
142	struct ypmaplist *ypml, *y;
143	struct hostent *hent;
144	struct sockaddr_in sin;
145	int notrans, mode, getmap;
146	int c, r, i;
147
148	getmap = notrans = mode = 0;
149	while( (c=getopt(argc, argv, "xd:mt")) != -1)
150		switch(c) {
151		case 'x':
152			for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
153				printf("\"%s\" is an alias for \"%s\"\n",
154					ypaliases[i].alias,
155					ypaliases[i].name);
156			exit(0);
157		case 'd':
158			domainname = optarg;
159			break;
160		case 't':
161			notrans++;
162			break;
163		case 'm':
164			mode++;
165			break;
166		default:
167			usage();
168		}
169
170	if(!domainname)
171		yp_get_default_domain(&domainname);
172
173	if(mode==0) {
174		switch(argc-optind) {
175		case 0:
176			bzero(&sin, sizeof sin);
177			sin.sin_family = AF_INET;
178			sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
179
180			if(bind_host(domainname, &sin))
181				exit(ERR_NOBINDING);
182			break;
183		case 1:
184			bzero(&sin, sizeof sin);
185			sin.sin_family = AF_INET;
186			if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) {
187				hent = gethostbyname(argv[optind]);
188				if(!hent)
189					errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
190				bcopy((char *)hent->h_addr_list[0],
191					(char *)&sin.sin_addr, sizeof sin.sin_addr);
192			}
193			if(bind_host(domainname, &sin))
194				exit(ERR_NOBINDING);
195			break;
196		default:
197			usage();
198		}
199		exit(0);
200	}
201
202	if( argc-optind > 1)
203		usage();
204
205	if(argv[optind]) {
206		map = argv[optind];
207		for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
208			if( strcmp(map, ypaliases[i].alias) == 0)
209				map = ypaliases[i].name;
210		r = yp_master(domainname, map, &master);
211		switch(r) {
212		case 0:
213			printf("%s\n", master);
214			free(master);
215			break;
216		case YPERR_YPBIND:
217			errx(ERR_NOYPBIND, "not running ypbind");
218		default:
219			errx(ERR_NOMASTER, "can't find master for map %s. reason: %s",
220				map, yperr_string(r));
221		}
222		exit(0);
223	}
224
225	ypml = NULL;
226	r = yp_maplist(domainname, &ypml);
227	switch(r) {
228	case 0:
229		for(y=ypml; y; ) {
230			ypml = y;
231			r = yp_master(domainname, ypml->map, &master);
232			switch(r) {
233			case 0:
234				printf("%s %s\n", ypml->map, master);
235				free(master);
236				break;
237			default:
238				warnx("can't find the master of %s: reason: %s",
239					ypml->map, yperr_string(r));
240				break;
241			}
242			y = ypml->next;
243			free(ypml);
244		}
245		break;
246	case YPERR_YPBIND:
247		errx(ERR_NOYPBIND, "not running ypbind");
248	default:
249		errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s",
250			domainname, yperr_string(r));
251	}
252	exit(0);
253}
254