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: src/usr.bin/ypwhich/ypwhich.c,v 1.19 2009/12/13 03:14:06 delphij Exp $"); 32 33#include <sys/param.h> 34#include <sys/types.h> 35#include <sys/socket.h> 36 37#include <rpc/rpc.h> 38#include <rpc/xdr.h> 39#include <rpcsvc/yp_prot.h> 40#include <rpcsvc/ypclnt.h> 41 42#include <netinet/in.h> 43 44#include <arpa/inet.h> 45 46#include <ctype.h> 47#include <err.h> 48#include <netdb.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <string.h> 52#include <unistd.h> 53 54#define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 55#define ERR_NOSUCHHOST 2 /* no such host */ 56#define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 57#define ERR_NOYPBIND 4 /* ypbind not running */ 58#define ERR_NOMASTER 5 /* could not find master server */ 59 60extern bool_t xdr_domainname(); 61 62struct ypalias { 63 char *alias, *name; 64} ypaliases[] = { 65 { "passwd", "passwd.byname" }, 66 { "master.passwd", "master.passwd.byname" }, 67 { "shadow", "shadow.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 77static void 78usage(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 */ 90static int 91bind_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 (xdrproc_t)xdr_domainname, &dom, 113 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv); 114 if (r != RPC_SUCCESS) { 115 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 116 clnt_destroy(client); 117 return (YPERR_YPBIND); 118 } else { 119 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 120 warnx("can't yp_bind: reason: %s", 121#ifdef __APPLE__ 122 yperr_string(ypbr.ypbind_status)); 123#else 124 ypbinderr_string(ypbr.ypbind_respbody.ypbind_error)); 125#endif 126 clnt_destroy(client); 127 return (r); 128 } 129 } 130 clnt_destroy(client); 131 132 ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr; 133 /*printf("%08x\n", ss_addr);*/ 134 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 135 if (hent) 136 printf("%s\n", hent->h_name); 137 else 138 printf("%s\n", inet_ntoa(ss_addr)); 139 return (0); 140} 141 142int 143main(int argc, char *argv[]) 144{ 145 char *domnam = NULL, *master; 146 char *map = NULL; 147 struct ypmaplist *ypml, *y; 148 struct hostent *hent; 149 struct sockaddr_in lsin; 150 int notrans, mode, getmap; 151 int c, r; 152 u_int i; 153 154 getmap = notrans = mode = 0; 155 while ((c = getopt(argc, argv, "xd:mt")) != -1) 156 switch (c) { 157 case 'x': 158 for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 159 printf("\"%s\" is an alias for \"%s\"\n", 160 ypaliases[i].alias, 161 ypaliases[i].name); 162 exit(0); 163 case 'd': 164 domnam = optarg; 165 break; 166 case 't': 167 notrans++; 168 break; 169 case 'm': 170 mode++; 171 break; 172 default: 173 usage(); 174 } 175 176 if (!domnam) 177 yp_get_default_domain(&domnam); 178 179 if (mode == 0) { 180 switch (argc-optind) { 181 case 0: 182 bzero(&lsin, sizeof lsin); 183 lsin.sin_family = AF_INET; 184 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 185 186 if (bind_host(domnam, &lsin)) 187 exit(ERR_NOBINDING); 188 break; 189 case 1: 190 bzero(&lsin, sizeof lsin); 191 lsin.sin_family = AF_INET; 192 if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) { 193 hent = gethostbyname(argv[optind]); 194 if (!hent) 195 errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]); 196 bcopy((char *)hent->h_addr_list[0], 197 (char *)&lsin.sin_addr, sizeof lsin.sin_addr); 198 } 199 if (bind_host(domnam, &lsin)) 200 exit(ERR_NOBINDING); 201 break; 202 default: 203 usage(); 204 } 205 exit(0); 206 } 207 208 if (argc-optind > 1) 209 usage(); 210 211 if (argv[optind]) { 212 map = argv[optind]; 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 r = yp_master(domnam, map, &master); 217 switch (r) { 218 case 0: 219 printf("%s\n", master); 220 free(master); 221 break; 222 case YPERR_YPBIND: 223 errx(ERR_NOYPBIND, "not running ypbind"); 224 default: 225 errx(ERR_NOMASTER, "can't find master for map %s: reason: %s", 226 map, yperr_string(r)); 227 } 228 exit(0); 229 } 230 231 ypml = NULL; 232 r = yp_maplist(domnam, &ypml); 233 switch (r) { 234 case 0: 235 for (y = ypml; y;) { 236 ypml = y; 237 r = yp_master(domnam, ypml->ypml_name, &master); 238 switch (r) { 239 case 0: 240 printf("%s %s\n", ypml->ypml_name, master); 241 free(master); 242 break; 243 default: 244 warnx("can't find the master of %s: reason: %s", 245 ypml->ypml_name, yperr_string(r)); 246 break; 247 } 248 y = ypml->ypml_next; 249 free(ypml); 250 } 251 break; 252 case YPERR_YPBIND: 253 errx(ERR_NOYPBIND, "not running ypbind"); 254 default: 255 errx(ERR_NOMASTER, "can't get map list for domain %s: reason: %s", 256 domnam, yperr_string(r)); 257 } 258 exit(0); 259} 260