ypwhich.c revision 7990
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 char rcsid[] = "ypwhich.c,v 1.2 1993/05/16 02:49:10 deraadt Exp"; 32#endif 33 34#include <sys/param.h> 35#include <sys/types.h> 36#include <sys/socket.h> 37#include <stdio.h> 38#include <ctype.h> 39#include <netdb.h> 40#include <rpc/rpc.h> 41#include <rpc/xdr.h> 42#include <rpcsvc/yp_prot.h> 43#include <rpcsvc/ypclnt.h> 44 45#define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 46#define ERR_NOSUCHHOST 2 /* no such host */ 47#define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 48#define ERR_NOYPBIND 4 /* ypbind not running */ 49#define ERR_NOMASTER 5 /* could not find master server */ 50 51extern bool_t xdr_domainname(); 52 53struct ypalias { 54 char *alias, *name; 55} ypaliases[] = { 56 { "passwd", "passwd.byname" }, 57 { "group", "group.byname" }, 58 { "networks", "networks.byaddr" }, 59 { "hosts", "hosts.byaddr" }, 60 { "protocols", "protocols.bynumber" }, 61 { "services", "services.byname" }, 62 { "aliases", "mail.aliases" }, 63 { "ethers", "ethers.byname" }, 64}; 65 66usage() 67{ 68 fprintf(stderr, "Usage:\n"); 69 fprintf(stderr, "\typwhich [-d domain] [[-t] -m [mname] | host]\n"); 70 fprintf(stderr, "\typwhich -x\n"); 71 exit(ERR_USAGE); 72} 73 74 75/* 76 * Like yp_bind except can query a specific host 77 */ 78bind_host(dom, sin) 79char *dom; 80struct sockaddr_in *sin; 81{ 82 struct hostent *hent = NULL; 83 struct ypbind_resp ypbr; 84 struct dom_binding *ysd; 85 struct timeval tv; 86 CLIENT *client; 87 int sock, r; 88 u_long ss_addr; 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 if(client==NULL) { 95 fprintf(stderr, "can't clntudp_create: %s\n", 96 yperr_string(YPERR_YPBIND)); 97 return YPERR_YPBIND; 98 } 99 100 tv.tv_sec = 5; 101 tv.tv_usec = 0; 102 r = clnt_call(client, YPBINDPROC_DOMAIN, 103 xdr_domainname, dom, xdr_ypbind_resp, &ypbr, tv); 104 if( r != RPC_SUCCESS) { 105 fprintf(stderr, "can't clnt_call: %s\n", 106 yperr_string(YPERR_YPBIND)); 107 clnt_destroy(client); 108 return YPERR_YPBIND; 109 } else { 110 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 111 fprintf(stderr, "can't yp_bind: Reason: %s\n", 112 ypbinderr_string(ypbr.ypbind_status)); 113 clnt_destroy(client); 114 return r; 115 } 116 } 117 clnt_destroy(client); 118 119 ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr.s_addr; 120 /*printf("%08x\n", ss_addr);*/ 121 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 122 if (hent) 123 printf("%s\n", hent->h_name); 124 else 125 printf("%s\n", inet_ntoa(ss_addr)); 126 return 0; 127} 128 129int 130main(argc, argv) 131char **argv; 132{ 133 char *domainname, *master, *map; 134 struct ypmaplist *ypml, *y; 135 extern char *optarg; 136 extern int optind; 137 struct hostent *hent; 138 struct sockaddr_in sin; 139 int notrans, mode, getmap; 140 int c, r, i; 141 142 yp_get_default_domain(&domainname); 143 144 map = NULL; 145 getmap = notrans = mode = 0; 146 while( (c=getopt(argc, argv, "xd:mt")) != -1) 147 switch(c) { 148 case 'x': 149 for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 150 printf("Use \"%s\" for \"%s\"\n", 151 ypaliases[i].alias, 152 ypaliases[i].name); 153 exit(0); 154 case 'd': 155 domainname = optarg; 156 break; 157 case 't': 158 notrans++; 159 break; 160 case 'm': 161 mode++; 162 break; 163 default: 164 usage(); 165 } 166 167 if(mode==0) { 168 switch(argc-optind) { 169 case 0: 170 bzero(&sin, sizeof sin); 171 sin.sin_family = AF_INET; 172 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 173 174 if(bind_host(domainname, &sin)) 175 exit(ERR_NOBINDING); 176 break; 177 case 1: 178 bzero(&sin, sizeof sin); 179 sin.sin_family = AF_INET; 180 if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) { 181 hent = gethostbyname(argv[optind]); 182 if(!hent) { 183 fprintf(stderr, "ypwhich: host %s unknown\n", 184 argv[optind]); 185 exit(ERR_NOSUCHHOST); 186 } 187 bcopy((char *)hent->h_addr_list[0], 188 (char *)&sin.sin_addr, sizeof sin.sin_addr); 189 } 190 if(bind_host(domainname, &sin)) 191 exit(ERR_NOBINDING); 192 break; 193 default: 194 usage(); 195 } 196 exit(0); 197 } 198 199 if( argc-optind > 1) 200 usage(); 201 202 if(argv[optind]) { 203 map = argv[optind]; 204 for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 205 if( strcmp(map, ypaliases[i].alias) == 0) 206 map = ypaliases[i].name; 207 r = yp_master(domainname, map, &master); 208 switch(r) { 209 case 0: 210 printf("%s\n", master); 211 free(master); 212 break; 213 case YPERR_YPBIND: 214 fprintf(stderr, "ypwhich: not running ypbind\n"); 215 exit(ERR_NOYPBIND); 216 default: 217 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 218 map, yperr_string(r)); 219 exit(ERR_NOMASTER); 220 } 221 exit(0); 222 } 223 224 ypml = NULL; 225 r = yp_maplist(domainname, &ypml); 226 switch(r) { 227 case 0: 228 for(y=ypml; y; ) { 229 ypml = y; 230 r = yp_master(domainname, ypml->ypml_name, &master); 231 switch(r) { 232 case 0: 233 printf("%s %s\n", ypml->ypml_name, master); 234 free(master); 235 break; 236 default: 237 fprintf(stderr, 238 "YP: can't find the master of %s: Reason: %s\n", 239 ypml->ypml_name, yperr_string(r)); 240 break; 241 } 242 y = ypml->ypml_next; 243 free(ypml); 244 } 245 break; 246 case YPERR_YPBIND: 247 fprintf(stderr, "ypwhich: not running ypbind\n"); 248 exit(ERR_NOYPBIND); 249 default: 250 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 251 domainname, yperr_string(r)); 252 exit(ERR_NOMASTER); 253 } 254 exit(0); 255} 256