ypwhich.c revision 28895
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#ifndef lint 31static const char rcsid[] = 32 "$Id$"; 33#endif /* not lint */ 34 35#include <sys/param.h> 36#include <sys/types.h> 37#include <sys/socket.h> 38#include <ctype.h> 39#include <err.h> 40#include <netdb.h> 41#include <stdio.h> 42#include <stdlib.h> 43#include <string.h> 44#include <unistd.h> 45#include <rpc/rpc.h> 46#include <rpc/xdr.h> 47#include <rpcsvc/yp.h> 48struct dom_binding{}; 49#include <rpcsvc/ypclnt.h> 50 51#define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 52#define ERR_NOSUCHHOST 2 /* no such host */ 53#define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 54#define ERR_NOYPBIND 4 /* ypbind not running */ 55#define ERR_NOMASTER 5 /* could not find master server */ 56 57extern bool_t xdr_domainname(); 58 59struct ypalias { 60 char *alias, *name; 61} ypaliases[] = { 62 { "passwd", "passwd.byname" }, 63 { "master.passwd", "master.passwd.byname" }, 64 { "group", "group.byname" }, 65 { "networks", "networks.byaddr" }, 66 { "hosts", "hosts.byaddr" }, 67 { "protocols", "protocols.bynumber" }, 68 { "services", "services.byname" }, 69 { "aliases", "mail.aliases" }, 70 { "ethers", "ethers.byname" }, 71}; 72 73static void 74usage() 75{ 76 fprintf(stderr, "%s\n%s\n", 77 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]", 78 " ypwhich -x"); 79 exit(ERR_USAGE); 80} 81 82 83/* 84 * Like yp_bind except can query a specific host 85 */ 86int 87bind_host(dom, sin) 88char *dom; 89struct sockaddr_in *sin; 90{ 91 struct hostent *hent = NULL; 92 struct ypbind_resp ypbr; 93 struct timeval tv; 94 CLIENT *client; 95 int sock, r; 96 u_long ss_addr; 97 98 sock = RPC_ANYSOCK; 99 tv.tv_sec = 15; 100 tv.tv_usec = 0; 101 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 102 if(client==NULL) { 103 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND)); 104 return YPERR_YPBIND; 105 } 106 107 tv.tv_sec = 5; 108 tv.tv_usec = 0; 109 r = clnt_call(client, YPBINDPROC_DOMAIN, 110 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 111 if( r != RPC_SUCCESS) { 112 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 113 clnt_destroy(client); 114 return YPERR_YPBIND; 115 } else { 116 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 117 warnx("can't yp_bind: reason: %s", 118 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error)); 119 clnt_destroy(client); 120 return r; 121 } 122 } 123 clnt_destroy(client); 124 125 ss_addr = *(u_long *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 126 /*printf("%08x\n", ss_addr);*/ 127 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 128 if (hent) 129 printf("%s\n", hent->h_name); 130 else 131 printf("%s\n", inet_ntoa(ss_addr)); 132 return 0; 133} 134 135int 136main(argc, argv) 137char **argv; 138{ 139 char *domainname = NULL, *master, *map = NULL; 140 struct ypmaplist *ypml, *y; 141 struct hostent *hent; 142 struct sockaddr_in sin; 143 int notrans, mode, getmap; 144 int c, r, i; 145 146 getmap = notrans = mode = 0; 147 while( (c=getopt(argc, argv, "xd:mt")) != -1) 148 switch(c) { 149 case 'x': 150 for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 151 printf("\"%s\" is an alias for \"%s\"\n", 152 ypaliases[i].alias, 153 ypaliases[i].name); 154 exit(0); 155 case 'd': 156 domainname = optarg; 157 break; 158 case 't': 159 notrans++; 160 break; 161 case 'm': 162 mode++; 163 break; 164 default: 165 usage(); 166 } 167 168 if(!domainname) 169 yp_get_default_domain(&domainname); 170 171 if(mode==0) { 172 switch(argc-optind) { 173 case 0: 174 bzero(&sin, sizeof sin); 175 sin.sin_family = AF_INET; 176 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 177 178 if(bind_host(domainname, &sin)) 179 exit(ERR_NOBINDING); 180 break; 181 case 1: 182 bzero(&sin, sizeof sin); 183 sin.sin_family = AF_INET; 184 if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) { 185 hent = gethostbyname(argv[optind]); 186 if(!hent) 187 errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]); 188 bcopy((char *)hent->h_addr_list[0], 189 (char *)&sin.sin_addr, sizeof sin.sin_addr); 190 } 191 if(bind_host(domainname, &sin)) 192 exit(ERR_NOBINDING); 193 break; 194 default: 195 usage(); 196 } 197 exit(0); 198 } 199 200 if( argc-optind > 1) 201 usage(); 202 203 if(argv[optind]) { 204 map = argv[optind]; 205 for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 206 if( strcmp(map, ypaliases[i].alias) == 0) 207 map = ypaliases[i].name; 208 r = yp_master(domainname, map, &master); 209 switch(r) { 210 case 0: 211 printf("%s\n", master); 212 free(master); 213 break; 214 case YPERR_YPBIND: 215 errx(ERR_NOYPBIND, "not running ypbind"); 216 default: 217 errx(ERR_NOMASTER, "can't find master for map %s. reason: %s", 218 map, yperr_string(r)); 219 } 220 exit(0); 221 } 222 223 ypml = NULL; 224 r = yp_maplist(domainname, &ypml); 225 switch(r) { 226 case 0: 227 for(y=ypml; y; ) { 228 ypml = y; 229 r = yp_master(domainname, ypml->map, &master); 230 switch(r) { 231 case 0: 232 printf("%s %s\n", ypml->map, master); 233 free(master); 234 break; 235 default: 236 warnx("can't find the master of %s: reason: %s", 237 ypml->map, yperr_string(r)); 238 break; 239 } 240 y = ypml->next; 241 free(ypml); 242 } 243 break; 244 case YPERR_YPBIND: 245 errx(ERR_NOYPBIND, "not running ypbind"); 246 default: 247 errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s", 248 domainname, yperr_string(r)); 249 } 250 exit(0); 251} 252