1 /* $OpenBSD: ypwhich.c,v 1.20 2009/10/27 23:59:50 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 #include <sys/param.h> 31 #include <sys/types.h> 32 #include <sys/socket.h> 33 34 #include <sys/socket.h> 35 #include <netinet/in.h> 36 #include <arpa/inet.h> 37 38 #include <stdio.h> 39 #include <string.h> 40 #include <stdlib.h> 41 #include <ctype.h> 42 #include <netdb.h> 43 #include <err.h> 44 45 #include <rpc/rpc.h> 46 #include <rpc/xdr.h> 47 #include <rpcsvc/yp.h> 48 #include <rpcsvc/ypclnt.h> 49 50 #include "yplib_host.h" 51 52 struct ypalias { 53 char *alias, *name; 54 } ypaliases[] = { 55 { "passwd", "passwd.byname" }, 56 { "group", "group.byname" }, 57 { "networks", "networks.byaddr" }, 58 { "hosts", "hosts.byaddr" }, 59 { "protocols", "protocols.bynumber" }, 60 { "services", "services.byname" }, 61 { "aliases", "mail.aliases" }, 62 { "ethers", "ethers.byname" }, 63 }; 64 65 int bind_host(char *dom, struct sockaddr_in *sin); 66 67 static void 68 usage(void) 69 { 70 fprintf(stderr, 71 "usage: ypwhich [-t] [-d domain] [[-h] host]\n" 72 " ypwhich [-t] [-d domain] [-h host] -m [mname]\n" 73 " ypwhich -x\n"); 74 exit(1); 75 } 76 77 78 /* 79 * Like yp_bind except can query a specific host 80 */ 81 int 82 bind_host(char *dom, struct sockaddr_in *sin) 83 { 84 struct hostent *hent = NULL; 85 struct ypbind_resp ypbr; 86 struct in_addr ss_addr; 87 struct timeval tv; 88 CLIENT *client; 89 int sock, r; 90 91 sock = RPC_ANYSOCK; 92 tv.tv_sec = 15; 93 tv.tv_usec = 0; 94 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 95 96 if (client == NULL) { 97 fprintf(stderr, "ypwhich: host is not bound to a ypmaster\n"); 98 return YPERR_YPBIND; 99 } 100 101 tv.tv_sec = 5; 102 tv.tv_usec = 0; 103 104 r = clnt_call(client, YPBINDPROC_DOMAIN, 105 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 106 if (r != RPC_SUCCESS) { 107 fprintf(stderr, "can't clnt_call: %s\n", 108 yperr_string(YPERR_YPBIND)); 109 clnt_destroy(client); 110 return YPERR_YPBIND; 111 } else { 112 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 113 fprintf(stderr, "can't yp_bind: Reason: %s\n", 114 yperr_string(ypbr.ypbind_status)); 115 clnt_destroy(client); 116 return r; 117 } 118 } 119 clnt_destroy(client); 120 121 memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 122 sizeof (ss_addr)); 123 124 hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr), 125 AF_INET); 126 if (hent != NULL) 127 printf("%s\n", hent->h_name); 128 else 129 printf("%s\n", inet_ntoa(ss_addr)); 130 131 return 0; 132 } 133 134 int 135 main(int argc, char *argv[]) 136 { 137 char *domain, *master, *map = NULL, *host = NULL; 138 int notrans = 0, mode = 0, c, r, i; 139 struct ypmaplist *ypml, *y; 140 struct sockaddr_in sin; 141 struct hostent *hent; 142 CLIENT *client = NULL; 143 144 yp_get_default_domain(&domain); 145 if (domain == NULL) 146 errx(1, "YP domain name not set"); 147 148 while ((c = getopt(argc, argv, "xd:h:mt")) != -1) 149 switch (c) { 150 case 'x': 151 for (i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 152 printf("Use \"%s\" for \"%s\"\n", 153 ypaliases[i].alias, ypaliases[i].name); 154 exit(0); 155 case 'h': 156 host = optarg; 157 break; 158 case 'd': 159 domain = optarg; 160 break; 161 case 't': 162 notrans++; 163 break; 164 case 'm': 165 mode++; 166 break; 167 default: 168 usage(); 169 } 170 argc -= optind; 171 argv += optind; 172 173 if (mode == 0) { 174 switch (argc) { 175 case 0: 176 memset(&sin, 0, sizeof sin); 177 sin.sin_family = AF_INET; 178 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 179 180 if (bind_host(domain, &sin)) 181 exit(1); 182 break; 183 case 1: 184 bzero(&sin, sizeof sin); 185 sin.sin_family = AF_INET; 186 if (inet_aton(argv[0], &sin.sin_addr) == 0) { 187 hent = gethostbyname(argv[0]); 188 if (!hent) { 189 fprintf(stderr, "ypwhich: host %s unknown\n", 190 argv[0]); 191 exit(1); 192 } 193 bcopy(hent->h_addr, &sin.sin_addr, 194 sizeof sin.sin_addr); 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 for (i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 214 if (strcmp(map, ypaliases[i].alias) == 0) 215 map = ypaliases[i].name; 216 217 if (host != NULL) 218 r = yp_master_host(client, domain, map, &master); 219 else 220 r = yp_master(domain, map, &master); 221 222 switch (r) { 223 case 0: 224 printf("%s\n", master); 225 free(master); 226 break; 227 case YPERR_YPBIND: 228 fprintf(stderr, "ypwhich: not running ypbind\n"); 229 exit(1); 230 default: 231 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 232 map, yperr_string(r)); 233 exit(1); 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 fprintf(stderr, 262 "YP: can't find the master of %s: Reason: %s\n", 263 ypml->map, yperr_string(r)); 264 break; 265 } 266 y = ypml->next; 267 free(ypml); 268 } 269 break; 270 case YPERR_YPBIND: 271 fprintf(stderr, "ypwhich: not running ypbind\n"); 272 exit(1); 273 default: 274 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 275 domain, yperr_string(r)); 276 exit(1); 277 } 278 exit(0); 279 } 280