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-NetBSD
6 *
7 * Copyright (c) 1992, 1993 Theo de Raadt <[email protected]>
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/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/socket.h>
38
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
41
42 #include <ctype.h>
43 #include <err.h>
44 #include <netdb.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #include <rpc/rpc.h>
51 #include <rpc/xdr.h>
52 #include <rpcsvc/yp.h>
53 #include <rpcsvc/ypclnt.h>
54
55 #include "yplib_host.h"
56
57 static const struct ypalias {
58 char *alias, *name;
59 } ypaliases[] = {
60 { "passwd", "passwd.byname" },
61 { "master.passwd", "master.passwd.byname" },
62 { "shadow", "shadow.byname" },
63 { "group", "group.byname" },
64 { "networks", "networks.byaddr" },
65 { "hosts", "hosts.byaddr" },
66 { "protocols", "protocols.bynumber" },
67 { "services", "services.byname" },
68 { "aliases", "mail.aliases" },
69 { "ethers", "ethers.byname" },
70 };
71
72 static void
usage(void)73 usage(void)
74 {
75 fprintf(stderr,
76 "usage: ypwhich [-t] [-d domain] [[-h] host]\n"
77 " ypwhich [-t] [-d domain] [-h host] -m [mname]\n"
78 " ypwhich -x\n");
79 exit(1);
80 }
81
82
83 /*
84 * Like yp_bind except can query a specific host
85 */
86 static int
bind_host(char * dom,struct sockaddr_in * sin)87 bind_host(char *dom, struct sockaddr_in *sin)
88 {
89 struct hostent *hent = NULL;
90 struct ypbind_resp ypbr;
91 struct in_addr ss_addr;
92 struct timeval tv;
93 CLIENT *client;
94 int sock, r;
95
96 sock = RPC_ANYSOCK;
97 tv.tv_sec = 15;
98 tv.tv_usec = 0;
99 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
100
101 if (client == NULL) {
102 warnx("host is not bound to a ypmaster");
103 return (YPERR_YPBIND);
104 }
105
106 tv.tv_sec = 5;
107 tv.tv_usec = 0;
108
109 r = clnt_call(client, YPBINDPROC_DOMAIN,
110 (xdrproc_t)xdr_domainname, &dom,
111 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
112 if (r != RPC_SUCCESS) {
113 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
114 clnt_destroy(client);
115 return (YPERR_YPBIND);
116 } else {
117 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
118 warnx("can't yp_bind: reason: %s",
119 yperr_string(ypbr.ypbind_status));
120 clnt_destroy(client);
121 return (r);
122 }
123 }
124 clnt_destroy(client);
125
126 memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
127 sizeof (ss_addr));
128
129 hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr),
130 AF_INET);
131 if (hent != NULL)
132 printf("%s\n", hent->h_name);
133 else
134 printf("%s\n", inet_ntoa(ss_addr));
135
136 return (0);
137 }
138
139 int
main(int argc,char * argv[])140 main(int argc, char *argv[])
141 {
142 char *domain, *master, *map = NULL, *host = NULL;
143 int notrans = 0, mode = 0, c, r, i;
144 struct ypmaplist *ypml, *y;
145 struct sockaddr_in sin;
146 struct hostent *hent;
147 CLIENT *client = NULL;
148
149 yp_get_default_domain(&domain);
150 if (domain == NULL)
151 errx(1, "YP domain name not set");
152
153 while ((c = getopt(argc, argv, "xd:h:mt")) != -1)
154 switch (c) {
155 case 'x':
156 for (i = 0; i < nitems(ypaliases); i++)
157 printf("\"%s\" is an alias for \"%s\"\n",
158 ypaliases[i].alias,
159 ypaliases[i].name);
160 exit(0);
161 case 'h':
162 host = optarg;
163 break;
164 case 'd':
165 domain = optarg;
166 break;
167 case 't':
168 notrans = 1;
169 break;
170 case 'm':
171 mode = 1;
172 break;
173 default:
174 usage();
175 }
176 argc -= optind;
177 argv += optind;
178
179 if (mode == 0) {
180 switch (argc) {
181 case 0:
182 memset(&sin, 0, sizeof sin);
183 sin.sin_family = AF_INET;
184 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
185
186 if (bind_host(domain, &sin))
187 exit(1);
188 break;
189 case 1:
190 bzero(&sin, sizeof sin);
191 sin.sin_family = AF_INET;
192 if (inet_aton(argv[0], &sin.sin_addr) == 0) {
193 hent = gethostbyname(argv[0]);
194 if (!hent) {
195 errx(1, "host %s unknown",
196 argv[0]);
197 }
198 }
199 if (bind_host(domain, &sin))
200 exit(1);
201 break;
202 default:
203 usage();
204 }
205 exit(0);
206 }
207
208 if (argc > 1)
209 usage();
210
211 if (host != NULL)
212 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1);
213
214 if (argv[0]) {
215 map = argv[0];
216 if (notrans == 0) {
217 for (i = 0; i < nitems(ypaliases); i++)
218 if (strcmp(map, ypaliases[i].alias) == 0)
219 map = ypaliases[i].name;
220 }
221
222 if (host != NULL)
223 r = yp_master_host(client, domain, map, &master);
224 else
225 r = yp_master(domain, map, &master);
226
227 switch (r) {
228 case 0:
229 printf("%s\n", master);
230 free(master);
231 break;
232 case YPERR_YPBIND:
233 errx(1, "not running ypbind");
234 default:
235 errx(1, "can't find master for map %s: reason: %s",
236 map, yperr_string(r));
237 }
238 exit(0);
239 }
240
241 ypml = NULL;
242 if (host != NULL)
243 r = yp_maplist_host(client, domain, &ypml);
244 else
245 r = yp_maplist(domain, &ypml);
246
247 r = 0;
248 switch (r) {
249 case 0:
250 for (y = ypml; y; ) {
251 ypml = y;
252 if (host != NULL) {
253 r = yp_master_host(client,
254 domain, ypml->map, &master);
255 } else {
256 r = yp_master(domain, ypml->map, &master);
257 }
258 switch (r) {
259 case 0:
260 printf("%s %s\n", ypml->map, master);
261 free(master);
262 break;
263 default:
264 warnx("can't find the master of %s: reason: %s",
265 ypml->map, yperr_string(r));
266 break;
267 }
268 y = ypml->next;
269 free(ypml);
270 }
271 break;
272 case YPERR_YPBIND:
273 errx(1, "not running ypbind");
274 default:
275 errx(1, "can't get map list for domain %s: reason: %s",
276 domain, yperr_string(r));
277 }
278 exit(0);
279 }
280