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 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 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 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