1 /* $OpenBSD: ypwhich.c,v 1.23 2015/02/08 23:40:35 deraadt Exp $ */
2 /* $NetBSD: ypwhich.c,v 1.6 1996/05/13 02:43:48 thorpej Exp $ */
3
4 /*-
5 * SPDX-License-Identifier: BSD-2-Clause
6 *
7 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/socket.h>
35
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
38
39 #include <ctype.h>
40 #include <err.h>
41 #include <netdb.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include <rpc/rpc.h>
48 #include <rpc/xdr.h>
49 #include <rpcsvc/yp.h>
50 #include <rpcsvc/ypclnt.h>
51
52 #include "yplib_host.h"
53
54 static const struct ypalias {
55 char *alias, *name;
56 } ypaliases[] = {
57 { "passwd", "passwd.byname" },
58 { "master.passwd", "master.passwd.byname" },
59 { "shadow", "shadow.byname" },
60 { "group", "group.byname" },
61 { "networks", "networks.byaddr" },
62 { "hosts", "hosts.byaddr" },
63 { "protocols", "protocols.bynumber" },
64 { "services", "services.byname" },
65 { "aliases", "mail.aliases" },
66 { "ethers", "ethers.byname" },
67 };
68
69 static void
usage(void)70 usage(void)
71 {
72 fprintf(stderr,
73 "usage: ypwhich [-t] [-d domain] [[-h] host]\n"
74 " ypwhich [-t] [-d domain] [-h host] -m [mname]\n"
75 " ypwhich -x\n");
76 exit(1);
77 }
78
79
80 /*
81 * Like yp_bind except can query a specific host
82 */
83 static int
bind_host(char * dom,struct sockaddr_in * sin)84 bind_host(char *dom, struct sockaddr_in *sin)
85 {
86 struct hostent *hent = NULL;
87 struct ypbind_resp ypbr;
88 struct in_addr ss_addr;
89 struct timeval tv;
90 CLIENT *client;
91 int sock, r;
92
93 sock = RPC_ANYSOCK;
94 tv.tv_sec = 15;
95 tv.tv_usec = 0;
96 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
97
98 if (client == NULL) {
99 warnx("host is not bound to a ypmaster");
100 return (YPERR_YPBIND);
101 }
102
103 tv.tv_sec = 5;
104 tv.tv_usec = 0;
105
106 r = clnt_call(client, YPBINDPROC_DOMAIN,
107 (xdrproc_t)xdr_domainname, &dom,
108 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
109 if (r != RPC_SUCCESS) {
110 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
111 clnt_destroy(client);
112 return (YPERR_YPBIND);
113 } else {
114 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
115 warnx("can't yp_bind: reason: %s",
116 yperr_string(ypbr.ypbind_status));
117 clnt_destroy(client);
118 return (r);
119 }
120 }
121 clnt_destroy(client);
122
123 memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
124 sizeof (ss_addr));
125
126 hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr),
127 AF_INET);
128 if (hent != NULL)
129 printf("%s\n", hent->h_name);
130 else
131 printf("%s\n", inet_ntoa(ss_addr));
132
133 return (0);
134 }
135
136 int
main(int argc,char * argv[])137 main(int argc, char *argv[])
138 {
139 char *domain, *master, *map = NULL, *host = NULL;
140 int notrans = 0, mode = 0, c, r, i;
141 struct ypmaplist *ypml, *y;
142 struct sockaddr_in sin;
143 struct hostent *hent;
144 CLIENT *client = NULL;
145
146 yp_get_default_domain(&domain);
147 if (domain == NULL)
148 errx(1, "YP domain name not set");
149
150 while ((c = getopt(argc, argv, "xd:h:mt")) != -1)
151 switch (c) {
152 case 'x':
153 for (i = 0; i < nitems(ypaliases); i++)
154 printf("\"%s\" is an alias for \"%s\"\n",
155 ypaliases[i].alias,
156 ypaliases[i].name);
157 exit(0);
158 case 'h':
159 host = optarg;
160 break;
161 case 'd':
162 domain = optarg;
163 break;
164 case 't':
165 notrans = 1;
166 break;
167 case 'm':
168 mode = 1;
169 break;
170 default:
171 usage();
172 }
173 argc -= optind;
174 argv += optind;
175
176 if (mode == 0) {
177 switch (argc) {
178 case 0:
179 memset(&sin, 0, sizeof sin);
180 sin.sin_family = AF_INET;
181 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
182
183 if (bind_host(domain, &sin))
184 exit(1);
185 break;
186 case 1:
187 bzero(&sin, sizeof sin);
188 sin.sin_family = AF_INET;
189 if (inet_aton(argv[0], &sin.sin_addr) == 0) {
190 hent = gethostbyname(argv[0]);
191 if (!hent) {
192 errx(1, "host %s unknown",
193 argv[0]);
194 }
195 }
196 if (bind_host(domain, &sin))
197 exit(1);
198 break;
199 default:
200 usage();
201 }
202 exit(0);
203 }
204
205 if (argc > 1)
206 usage();
207
208 if (host != NULL)
209 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1);
210
211 if (argv[0]) {
212 map = argv[0];
213 if (notrans == 0) {
214 for (i = 0; i < nitems(ypaliases); i++)
215 if (strcmp(map, ypaliases[i].alias) == 0)
216 map = ypaliases[i].name;
217 }
218
219 if (host != NULL)
220 r = yp_master_host(client, domain, map, &master);
221 else
222 r = yp_master(domain, map, &master);
223
224 switch (r) {
225 case 0:
226 printf("%s\n", master);
227 free(master);
228 break;
229 case YPERR_YPBIND:
230 errx(1, "not running ypbind");
231 default:
232 errx(1, "can't find master for map %s: reason: %s",
233 map, yperr_string(r));
234 }
235 exit(0);
236 }
237
238 ypml = NULL;
239 if (host != NULL)
240 r = yp_maplist_host(client, domain, &ypml);
241 else
242 r = yp_maplist(domain, &ypml);
243
244 r = 0;
245 switch (r) {
246 case 0:
247 for (y = ypml; y; ) {
248 ypml = y;
249 if (host != NULL) {
250 r = yp_master_host(client,
251 domain, ypml->map, &master);
252 } else {
253 r = yp_master(domain, ypml->map, &master);
254 }
255 switch (r) {
256 case 0:
257 printf("%s %s\n", ypml->map, master);
258 free(master);
259 break;
260 default:
261 warnx("can't find the master of %s: reason: %s",
262 ypml->map, yperr_string(r));
263 break;
264 }
265 y = ypml->next;
266 free(ypml);
267 }
268 break;
269 case YPERR_YPBIND:
270 errx(1, "not running ypbind");
271 default:
272 errx(1, "can't get map list for domain %s: reason: %s",
273 domain, yperr_string(r));
274 }
275 exit(0);
276 }
277