1 /* $OpenBSD: ypwhich.c,v 1.24 2024/08/19 06:00:18 florian 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/types.h> 31 #include <sys/socket.h> 32 33 #include <netinet/in.h> 34 #include <arpa/inet.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <netdb.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include <rpc/rpc.h> 45 #include <rpc/xdr.h> 46 #include <rpcsvc/yp.h> 47 #include <rpcsvc/ypclnt.h> 48 49 #include "yplib_host.h" 50 51 struct ypalias { 52 char *alias, *name; 53 } ypaliases[] = { 54 { "passwd", "passwd.byname" }, 55 { "group", "group.byname" }, 56 { "networks", "networks.byaddr" }, 57 { "hosts", "hosts.byaddr" }, 58 { "protocols", "protocols.bynumber" }, 59 { "services", "services.byname" }, 60 { "aliases", "mail.aliases" }, 61 { "ethers", "ethers.byname" }, 62 }; 63 64 int bind_host(char *dom, struct sockaddr_in *sin); 65 66 static void 67 usage(void) 68 { 69 fprintf(stderr, 70 "usage: ypwhich [-t] [-d domain] [[-h] host]\n" 71 " ypwhich [-t] [-d domain] [-h host] -m [mname]\n" 72 " ypwhich -x\n"); 73 exit(1); 74 } 75 76 77 /* 78 * Like yp_bind except can query a specific host 79 */ 80 int 81 bind_host(char *dom, struct sockaddr_in *sin) 82 { 83 struct hostent *hent = NULL; 84 struct ypbind_resp ypbr; 85 struct in_addr ss_addr; 86 struct timeval tv; 87 CLIENT *client; 88 int sock, r; 89 90 sock = RPC_ANYSOCK; 91 tv.tv_sec = 15; 92 tv.tv_usec = 0; 93 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 94 95 if (client == NULL) { 96 fprintf(stderr, "ypwhich: host is not bound to a ypmaster\n"); 97 return YPERR_YPBIND; 98 } 99 100 tv.tv_sec = 5; 101 tv.tv_usec = 0; 102 103 r = clnt_call(client, YPBINDPROC_DOMAIN, 104 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 105 if (r != RPC_SUCCESS) { 106 fprintf(stderr, "can't clnt_call: %s\n", 107 yperr_string(YPERR_YPBIND)); 108 clnt_destroy(client); 109 return YPERR_YPBIND; 110 } else { 111 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 112 fprintf(stderr, "can't yp_bind: Reason: %s\n", 113 yperr_string(ypbr.ypbind_status)); 114 clnt_destroy(client); 115 return r; 116 } 117 } 118 clnt_destroy(client); 119 120 memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr, 121 sizeof (ss_addr)); 122 123 hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr), 124 AF_INET); 125 if (hent != NULL) 126 printf("%s\n", hent->h_name); 127 else 128 printf("%s\n", inet_ntoa(ss_addr)); 129 130 return 0; 131 } 132 133 int 134 main(int argc, char *argv[]) 135 { 136 char *domain, *master, *map = NULL, *host = NULL; 137 int notrans = 0, mode = 0, c, r, i; 138 struct ypmaplist *ypml, *y; 139 struct sockaddr_in sin; 140 struct addrinfo hints, *res; 141 CLIENT *client = NULL; 142 143 yp_get_default_domain(&domain); 144 if (domain == NULL) 145 errx(1, "YP domain name not set"); 146 147 while ((c = getopt(argc, argv, "xd:h:mt")) != -1) 148 switch (c) { 149 case 'x': 150 for (i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 151 printf("Use \"%s\" for \"%s\"\n", 152 ypaliases[i].alias, ypaliases[i].name); 153 exit(0); 154 case 'h': 155 host = optarg; 156 break; 157 case 'd': 158 domain = optarg; 159 break; 160 case 't': 161 notrans = 1; 162 break; 163 case 'm': 164 mode = 1; 165 break; 166 default: 167 usage(); 168 } 169 argc -= optind; 170 argv += optind; 171 172 if (mode == 0) { 173 switch (argc) { 174 case 0: 175 memset(&sin, 0, sizeof sin); 176 sin.sin_family = AF_INET; 177 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 178 179 if (bind_host(domain, &sin)) 180 exit(1); 181 break; 182 case 1: 183 bzero(&sin, sizeof sin); 184 memset(&hints, 0, sizeof(hints)); 185 hints.ai_family = AF_INET; 186 sin.sin_family = AF_INET; 187 if (getaddrinfo(argv[0], NULL, &hints, &res) != 0) { 188 fprintf(stderr, "ypwhich: host %s unknown\n", 189 argv[0]); 190 exit(1); 191 } 192 sin.sin_addr = 193 ((struct sockaddr_in *)res->ai_addr)->sin_addr; 194 freeaddrinfo(res); 195 if (bind_host(domain, &sin)) 196 exit(1); 197 break; 198 default: 199 usage(); 200 } 201 exit(0); 202 } 203 204 if (argc > 1) 205 usage(); 206 207 if (host != NULL) 208 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1); 209 210 if (argv[0]) { 211 map = argv[0]; 212 for (i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 213 if (strcmp(map, ypaliases[i].alias) == 0) 214 map = ypaliases[i].name; 215 216 if (host != NULL) 217 r = yp_master_host(client, domain, map, &master); 218 else 219 r = yp_master(domain, map, &master); 220 221 switch (r) { 222 case 0: 223 printf("%s\n", master); 224 free(master); 225 break; 226 case YPERR_YPBIND: 227 fprintf(stderr, "ypwhich: not running ypbind\n"); 228 exit(1); 229 default: 230 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 231 map, yperr_string(r)); 232 exit(1); 233 } 234 exit(0); 235 } 236 237 ypml = NULL; 238 if (host != NULL) 239 r = yp_maplist_host(client, domain, &ypml); 240 else 241 r = yp_maplist(domain, &ypml); 242 243 r = 0; 244 switch (r) { 245 case 0: 246 for (y = ypml; y; ) { 247 ypml = y; 248 if (host != NULL) { 249 r = yp_master_host(client, 250 domain, ypml->map, &master); 251 } else { 252 r = yp_master(domain, ypml->map, &master); 253 } 254 switch (r) { 255 case 0: 256 printf("%s %s\n", ypml->map, master); 257 free(master); 258 break; 259 default: 260 fprintf(stderr, 261 "YP: can't find the master of %s: Reason: %s\n", 262 ypml->map, yperr_string(r)); 263 break; 264 } 265 y = ypml->next; 266 free(ypml); 267 } 268 break; 269 case YPERR_YPBIND: 270 fprintf(stderr, "ypwhich: not running ypbind\n"); 271 exit(1); 272 default: 273 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 274 domain, yperr_string(r)); 275 exit(1); 276 } 277 exit(0); 278 } 279