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 * $FreeBSD: src/usr.bin/ypwhich/ypwhich.c,v 1.16 2004/04/04 19:17:38 charnier Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/socket.h>
35
36 #include <rpc/rpc.h>
37 #include <rpc/xdr.h>
38 #include <rpcsvc/yp_prot.h>
39 #include <rpcsvc/ypclnt.h>
40
41 #include <netinet/in.h>
42
43 #include <arpa/inet.h>
44
45 #include <ctype.h>
46 #include <err.h>
47 #include <netdb.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <unistd.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
59 extern bool_t xdr_domainname();
60
61 static const struct 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
75 static void
usage(void)76 usage(void)
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 */
88 static int
bind_host(char * dom,struct sockaddr_in * lsin)89 bind_host(char *dom, struct sockaddr_in *lsin)
90 {
91 struct hostent *hent = NULL;
92 struct ypbind_resp ypbr;
93 struct timeval tv;
94 CLIENT *client;
95 int sock, r;
96 struct in_addr ss_addr;
97
98 sock = RPC_ANYSOCK;
99 tv.tv_sec = 15;
100 tv.tv_usec = 0;
101 client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock);
102 if (client == NULL) {
103 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND));
104 return (YPERR_YPBIND);
105 }
106
107 tv.tv_sec = 5;
108 tv.tv_usec = 0;
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 ypbinderr_string(ypbr.ypbind_respbody.ypbind_error));
120 clnt_destroy(client);
121 return (r);
122 }
123 }
124 clnt_destroy(client);
125
126 ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr;
127 /*printf("%08x\n", ss_addr);*/
128 hent = gethostbyaddr(&ss_addr, sizeof(ss_addr), AF_INET);
129 if (hent)
130 printf("%s\n", hent->h_name);
131 else
132 printf("%s\n", inet_ntoa(ss_addr));
133 return (0);
134 }
135
136 int
main(int argc,char * argv[])137 main(int argc, char *argv[])
138 {
139 char *domnam = NULL, *master;
140 char *map = NULL;
141 struct ypmaplist *ypml, *y;
142 struct hostent *hent;
143 struct sockaddr_in lsin;
144 int notrans, mode;
145 int c, r;
146 u_int i;
147
148 notrans = mode = 0;
149 while ((c = getopt(argc, argv, "xd:mt")) != -1)
150 switch (c) {
151 case 'x':
152 for (i = 0; i < NELEM(ypaliases); 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 domnam = 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 (!domnam)
171 yp_get_default_domain(&domnam);
172
173 if (mode == 0) {
174 switch (argc-optind) {
175 case 0:
176 bzero(&lsin, sizeof lsin);
177 lsin.sin_family = AF_INET;
178 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
179
180 if (bind_host(domnam, &lsin))
181 exit(ERR_NOBINDING);
182 break;
183 case 1:
184 bzero(&lsin, sizeof lsin);
185 lsin.sin_family = AF_INET;
186 if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) {
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 *)&lsin.sin_addr, sizeof lsin.sin_addr);
192 }
193 if (bind_host(domnam, &lsin))
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 < NELEM(ypaliases); i++)
208 if (strcmp(map, ypaliases[i].alias) == 0)
209 map = ypaliases[i].name;
210 r = yp_master(domnam, 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(domnam, &ypml);
227 switch (r) {
228 case 0:
229 for (y = ypml; y;) {
230 ypml = y;
231 r = yp_master(domnam, ypml->ypml_name, &master);
232 switch (r) {
233 case 0:
234 printf("%s %s\n", ypml->ypml_name, master);
235 free(master);
236 break;
237 default:
238 warnx("can't find the master of %s: reason: %s",
239 ypml->ypml_name, yperr_string(r));
240 break;
241 }
242 y = ypml->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 domnam, yperr_string(r));
251 }
252 exit(0);
253 }
254