1 /* $OpenBSD: ypwhich.c,v 1.16 2003/07/06 23:26:18 deraadt Exp $ */ 2 /* $NetBSD: ypwhich.c,v 1.6 1996/05/13 02:43:48 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 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 31 static char rcsid[] = "$Id: ypwhich.c,v 1.16 2003/07/06 23:26:18 deraadt Exp $"; 32 #endif 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 38 #include <sys/socket.h> 39 #include <netinet/in.h> 40 #include <arpa/inet.h> 41 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <ctype.h> 46 #include <netdb.h> 47 #include <err.h> 48 49 #include <rpc/rpc.h> 50 #include <rpc/xdr.h> 51 #include <rpcsvc/yp.h> 52 #include <rpcsvc/ypclnt.h> 53 54 #include "yplib_host.h" 55 56 struct ypalias { 57 char *alias, *name; 58 } ypaliases[] = { 59 { "passwd", "passwd.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 int bind_host(char *dom, struct sockaddr_in *sin); 70 71 static void 72 usage(void) 73 { 74 fprintf(stderr, 75 "usage: ypwhich [-d domain] [[-h host] [-t] -m [mname] | host]\n"); 76 fprintf(stderr, " ypwhich -x\n"); 77 exit(1); 78 } 79 80 81 /* 82 * Like yp_bind except can query a specific host 83 */ 84 int 85 bind_host(char *dom, struct sockaddr_in *sin) 86 { 87 struct hostent *hent = NULL; 88 struct ypbind_resp ypbr; 89 struct in_addr ss_addr; 90 struct timeval tv; 91 CLIENT *client; 92 int sock, r; 93 94 sock = RPC_ANYSOCK; 95 tv.tv_sec = 15; 96 tv.tv_usec = 0; 97 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 98 99 if (client == NULL) { 100 fprintf(stderr, "ypwhich: host is not bound to a ypmaster\n"); 101 return YPERR_YPBIND; 102 } 103 104 tv.tv_sec = 5; 105 tv.tv_usec = 0; 106 107 r = clnt_call(client, YPBINDPROC_DOMAIN, 108 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 109 if (r != RPC_SUCCESS) { 110 fprintf(stderr, "can't clnt_call: %s\n", 111 yperr_string(YPERR_YPBIND)); 112 clnt_destroy(client); 113 return YPERR_YPBIND; 114 } else { 115 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 116 fprintf(stderr, "can't yp_bind: Reason: %s\n", 117 yperr_string(ypbr.ypbind_status)); 118 clnt_destroy(client); 119 return r; 120 } 121 } 122 clnt_destroy(client); 123 124 memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 125 sizeof (ss_addr)); 126 127 hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr), 128 AF_INET); 129 if (hent != NULL) 130 printf("%s\n", hent->h_name); 131 else 132 printf("%s\n", inet_ntoa(ss_addr)); 133 134 return 0; 135 } 136 137 int 138 main(int argc, char *argv[]) 139 { 140 char *domain, *master, *map = NULL, *host = NULL; 141 int notrans, mode, getmap, c, r, i; 142 struct ypmaplist *ypml, *y; 143 struct sockaddr_in sin; 144 struct hostent *hent; 145 CLIENT *client = NULL; 146 147 getmap = notrans = mode = 0; 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<sizeof ypaliases/sizeof ypaliases[0]; i++) 157 printf("Use \"%s\" for \"%s\"\n", 158 ypaliases[i].alias, ypaliases[i].name); 159 exit(0); 160 case 'h': 161 host = optarg; 162 break; 163 case 'd': 164 domain = optarg; 165 break; 166 case 't': 167 notrans++; 168 break; 169 case 'm': 170 mode++; 171 break; 172 default: 173 usage(); 174 } 175 argc -= optind; 176 argv += optind; 177 178 if (mode == 0) { 179 switch (argc) { 180 case 0: 181 memset(&sin, 0, sizeof sin); 182 sin.sin_family = AF_INET; 183 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 184 185 if (bind_host(domain, &sin)) 186 exit(1); 187 break; 188 case 1: 189 bzero(&sin, sizeof sin); 190 sin.sin_family = AF_INET; 191 if (inet_aton(argv[0], &sin.sin_addr) == 0) { 192 hent = gethostbyname(argv[0]); 193 if (!hent) { 194 fprintf(stderr, "ypwhich: host %s unknown\n", 195 argv[0]); 196 exit(1); 197 } 198 bcopy((char *)hent->h_addr, 199 (char *)&sin.sin_addr, sizeof sin.sin_addr); 200 } 201 if (bind_host(domain, &sin)) 202 exit(1); 203 break; 204 default: 205 usage(); 206 } 207 exit(0); 208 } 209 210 if (argc > 1) 211 usage(); 212 213 if (host != NULL) 214 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1); 215 216 if (argv[0]) { 217 map = argv[0]; 218 for (i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 219 if (strcmp(map, ypaliases[i].alias) == 0) 220 map = ypaliases[i].name; 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 fprintf(stderr, "ypwhich: not running ypbind\n"); 234 exit(1); 235 default: 236 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 237 map, yperr_string(r)); 238 exit(1); 239 } 240 exit(0); 241 } 242 243 ypml = NULL; 244 if (host != NULL) 245 r = yp_maplist_host(client, domain, &ypml); 246 else 247 r = yp_maplist(domain, &ypml); 248 249 r = 0; 250 switch (r) { 251 case 0: 252 for (y = ypml; y; ) { 253 ypml = y; 254 if (host != NULL) { 255 r = yp_master_host(client, 256 domain, ypml->map, &master); 257 } else { 258 r = yp_master(domain, ypml->map, &master); 259 } 260 switch (r) { 261 case 0: 262 printf("%s %s\n", ypml->map, master); 263 free(master); 264 break; 265 default: 266 fprintf(stderr, 267 "YP: can't find the master of %s: Reason: %s\n", 268 ypml->map, yperr_string(r)); 269 break; 270 } 271 y = ypml->next; 272 free(ypml); 273 } 274 break; 275 case YPERR_YPBIND: 276 fprintf(stderr, "ypwhich: not running ypbind\n"); 277 exit(1); 278 default: 279 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 280 domain, yperr_string(r)); 281 exit(1); 282 } 283 exit(0); 284 } 285