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 * 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/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/types.h> 35 #include <sys/socket.h> 36 37 #include <netinet/in.h> 38 #include <arpa/inet.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include <rpc/rpc.h> 49 #include <rpc/xdr.h> 50 #include <rpcsvc/yp.h> 51 #include <rpcsvc/ypclnt.h> 52 53 #include "yplib_host.h" 54 55 static const struct ypalias { 56 char *alias, *name; 57 } ypaliases[] = { 58 { "passwd", "passwd.byname" }, 59 { "master.passwd", "master.passwd.byname" }, 60 { "shadow", "shadow.byname" }, 61 { "group", "group.byname" }, 62 { "networks", "networks.byaddr" }, 63 { "hosts", "hosts.byaddr" }, 64 { "protocols", "protocols.bynumber" }, 65 { "services", "services.byname" }, 66 { "aliases", "mail.aliases" }, 67 { "ethers", "ethers.byname" }, 68 }; 69 70 static void 71 usage(void) 72 { 73 fprintf(stderr, 74 "usage: ypwhich [-t] [-d domain] [[-h] host]\n" 75 " ypwhich [-t] [-d domain] [-h host] -m [mname]\n" 76 " ypwhich -x\n"); 77 exit(1); 78 } 79 80 81 /* 82 * Like yp_bind except can query a specific host 83 */ 84 static 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 warnx("host is not bound to a ypmaster"); 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 (xdrproc_t)xdr_domainname, &dom, 109 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv); 110 if (r != RPC_SUCCESS) { 111 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 112 clnt_destroy(client); 113 return (YPERR_YPBIND); 114 } else { 115 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 116 warnx("can't yp_bind: reason: %s", 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 = 0, mode = 0, c, r, i; 142 struct ypmaplist *ypml, *y; 143 struct sockaddr_in sin; 144 struct hostent *hent; 145 CLIENT *client = NULL; 146 147 yp_get_default_domain(&domain); 148 if (domain == NULL) 149 errx(1, "YP domain name not set"); 150 151 while ((c = getopt(argc, argv, "xd:h:mt")) != -1) 152 switch (c) { 153 case 'x': 154 for (i = 0; i < nitems(ypaliases); i++) 155 printf("\"%s\" is an alias for \"%s\"\n", 156 ypaliases[i].alias, 157 ypaliases[i].name); 158 exit(0); 159 case 'h': 160 host = optarg; 161 break; 162 case 'd': 163 domain = optarg; 164 break; 165 case 't': 166 notrans = 1; 167 break; 168 case 'm': 169 mode = 1; 170 break; 171 default: 172 usage(); 173 } 174 argc -= optind; 175 argv += optind; 176 177 if (mode == 0) { 178 switch (argc) { 179 case 0: 180 memset(&sin, 0, sizeof sin); 181 sin.sin_family = AF_INET; 182 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 183 184 if (bind_host(domain, &sin)) 185 exit(1); 186 break; 187 case 1: 188 bzero(&sin, sizeof sin); 189 sin.sin_family = AF_INET; 190 if (inet_aton(argv[0], &sin.sin_addr) == 0) { 191 hent = gethostbyname(argv[0]); 192 if (!hent) { 193 errx(1, "host %s unknown", 194 argv[0]); 195 } 196 } 197 if (bind_host(domain, &sin)) 198 exit(1); 199 break; 200 default: 201 usage(); 202 } 203 exit(0); 204 } 205 206 if (argc > 1) 207 usage(); 208 209 if (host != NULL) 210 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1); 211 212 if (argv[0]) { 213 map = argv[0]; 214 if (notrans == 0) { 215 for (i = 0; i < nitems(ypaliases); i++) 216 if (strcmp(map, ypaliases[i].alias) == 0) 217 map = ypaliases[i].name; 218 } 219 220 if (host != NULL) 221 r = yp_master_host(client, domain, map, &master); 222 else 223 r = yp_master(domain, map, &master); 224 225 switch (r) { 226 case 0: 227 printf("%s\n", master); 228 free(master); 229 break; 230 case YPERR_YPBIND: 231 errx(1, "not running ypbind"); 232 default: 233 errx(1, "can't find master for map %s: reason: %s", 234 map, yperr_string(r)); 235 } 236 exit(0); 237 } 238 239 ypml = NULL; 240 if (host != NULL) 241 r = yp_maplist_host(client, domain, &ypml); 242 else 243 r = yp_maplist(domain, &ypml); 244 245 r = 0; 246 switch (r) { 247 case 0: 248 for (y = ypml; y; ) { 249 ypml = y; 250 if (host != NULL) { 251 r = yp_master_host(client, 252 domain, ypml->map, &master); 253 } else { 254 r = yp_master(domain, ypml->map, &master); 255 } 256 switch (r) { 257 case 0: 258 printf("%s %s\n", ypml->map, master); 259 free(master); 260 break; 261 default: 262 warnx("can't find the master of %s: reason: %s", 263 ypml->map, yperr_string(r)); 264 break; 265 } 266 y = ypml->next; 267 free(ypml); 268 } 269 break; 270 case YPERR_YPBIND: 271 errx(1, "not running ypbind"); 272 default: 273 errx(1, "can't get map list for domain %s: reason: %s", 274 domain, yperr_string(r)); 275 } 276 exit(0); 277 } 278