1 /* 2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 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 <rpcsvc/ypclnt.h> 38 39 #include <netinet/in.h> 40 41 #include <arpa/inet.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <rpc/rpc.h> 51 #include <rpc/xdr.h> 52 #include <rpcsvc/yp.h> 53 struct dom_binding{}; 54 55 #define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 56 #define ERR_NOSUCHHOST 2 /* no such host */ 57 #define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 58 #define ERR_NOYPBIND 4 /* ypbind not running */ 59 #define ERR_NOMASTER 5 /* could not find master server */ 60 61 extern bool_t xdr_domainname(); 62 63 struct ypalias { 64 const char *alias, *name; 65 } ypaliases[] = { 66 { "passwd", "passwd.byname" }, 67 { "master.passwd", "master.passwd.byname" }, 68 { "group", "group.byname" }, 69 { "networks", "networks.byaddr" }, 70 { "hosts", "hosts.byaddr" }, 71 { "protocols", "protocols.bynumber" }, 72 { "services", "services.byname" }, 73 { "aliases", "mail.aliases" }, 74 { "ethers", "ethers.byname" }, 75 }; 76 77 static void 78 usage(void) 79 { 80 fprintf(stderr, "%s\n%s\n", 81 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]", 82 " ypwhich -x"); 83 exit(ERR_USAGE); 84 } 85 86 87 /* 88 * Like yp_bind except can query a specific host 89 */ 90 static int 91 bind_host(char *dom, struct sockaddr_in *lsin) 92 { 93 struct hostent *hent = NULL; 94 struct ypbind_resp ypbr; 95 struct timeval tv; 96 CLIENT *client; 97 int sock, r; 98 struct in_addr ss_addr; 99 100 sock = RPC_ANYSOCK; 101 tv.tv_sec = 15; 102 tv.tv_usec = 0; 103 client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock); 104 if (client == NULL) { 105 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND)); 106 return (YPERR_YPBIND); 107 } 108 109 tv.tv_sec = 5; 110 tv.tv_usec = 0; 111 r = clnt_call(client, YPBINDPROC_DOMAIN, 112 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 113 if (r != RPC_SUCCESS) { 114 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 115 clnt_destroy(client); 116 return (YPERR_YPBIND); 117 } else { 118 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 119 warnx("can't yp_bind: reason: %s", 120 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error)); 121 clnt_destroy(client); 122 return (r); 123 } 124 } 125 clnt_destroy(client); 126 127 ss_addr = *(struct in_addr *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 128 /*printf("%08x\n", ss_addr);*/ 129 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 130 if (hent) 131 printf("%s\n", hent->h_name); 132 else 133 printf("%s\n", inet_ntoa(ss_addr)); 134 return (0); 135 } 136 137 int 138 main(int argc, char *argv[]) 139 { 140 char *domnam = NULL, *master; 141 const char *map = NULL; 142 struct ypmaplist *ypml, *y; 143 struct hostent *hent; 144 struct sockaddr_in lsin; 145 int notrans, mode, getmap; 146 int c, r; 147 u_int i; 148 149 getmap = notrans = mode = 0; 150 while ((c = getopt(argc, argv, "xd:mt")) != -1) 151 switch (c) { 152 case 'x': 153 for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 154 printf("\"%s\" is an alias for \"%s\"\n", 155 ypaliases[i].alias, 156 ypaliases[i].name); 157 exit(0); 158 case 'd': 159 domnam = optarg; 160 break; 161 case 't': 162 notrans++; 163 break; 164 case 'm': 165 mode++; 166 break; 167 default: 168 usage(); 169 } 170 171 if (!domnam) 172 yp_get_default_domain(&domnam); 173 174 if (mode == 0) { 175 switch (argc-optind) { 176 case 0: 177 bzero(&lsin, sizeof lsin); 178 lsin.sin_family = AF_INET; 179 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 180 181 if (bind_host(domnam, &lsin)) 182 exit(ERR_NOBINDING); 183 break; 184 case 1: 185 bzero(&lsin, sizeof lsin); 186 lsin.sin_family = AF_INET; 187 if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) { 188 hent = gethostbyname(argv[optind]); 189 if (!hent) 190 errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]); 191 bcopy((char *)hent->h_addr_list[0], 192 (char *)&lsin.sin_addr, sizeof lsin.sin_addr); 193 } 194 if (bind_host(domnam, &lsin)) 195 exit(ERR_NOBINDING); 196 break; 197 default: 198 usage(); 199 } 200 exit(0); 201 } 202 203 if (argc-optind > 1) 204 usage(); 205 206 if (argv[optind]) { 207 map = argv[optind]; 208 for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 209 if (strcmp(map, ypaliases[i].alias) == 0) 210 map = ypaliases[i].name; 211 r = yp_master(domnam, map, &master); 212 switch (r) { 213 case 0: 214 printf("%s\n", master); 215 free(master); 216 break; 217 case YPERR_YPBIND: 218 errx(ERR_NOYPBIND, "not running ypbind"); 219 default: 220 errx(ERR_NOMASTER, "can't find master for map %s. reason: %s", 221 map, yperr_string(r)); 222 } 223 exit(0); 224 } 225 226 ypml = NULL; 227 r = yp_maplist(domnam, &ypml); 228 switch (r) { 229 case 0: 230 for (y = ypml; y;) { 231 ypml = y; 232 r = yp_master(domnam, ypml->map, &master); 233 switch (r) { 234 case 0: 235 printf("%s %s\n", ypml->map, master); 236 free(master); 237 break; 238 default: 239 warnx("can't find the master of %s: reason: %s", 240 ypml->map, yperr_string(r)); 241 break; 242 } 243 y = ypml->next; 244 free(ypml); 245 } 246 break; 247 case YPERR_YPBIND: 248 errx(ERR_NOYPBIND, "not running ypbind"); 249 default: 250 errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s", 251 domnam, yperr_string(r)); 252 } 253 exit(0); 254 } 255