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 31 static 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.h> 43 struct dom_binding{}; 44 #include <rpcsvc/ypclnt.h> 45 46 #define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 47 #define ERR_NOSUCHHOST 2 /* no such host */ 48 #define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 49 #define ERR_NOYPBIND 4 /* ypbind not running */ 50 #define ERR_NOMASTER 5 /* could not find master server */ 51 52 extern bool_t xdr_domainname(); 53 54 struct ypalias { 55 char *alias, *name; 56 } ypaliases[] = { 57 { "passwd", "passwd.byname" }, 58 { "group", "group.byname" }, 59 { "networks", "networks.byaddr" }, 60 { "hosts", "hosts.byaddr" }, 61 { "protocols", "protocols.bynumber" }, 62 { "services", "services.byname" }, 63 { "aliases", "mail.aliases" }, 64 { "ethers", "ethers.byname" }, 65 }; 66 67 usage() 68 { 69 fprintf(stderr, "Usage:\n"); 70 fprintf(stderr, "\typwhich [-d domain] [[-t] -m [mname] | host]\n"); 71 fprintf(stderr, "\typwhich -x\n"); 72 exit(ERR_USAGE); 73 } 74 75 76 /* 77 * Like yp_bind except can query a specific host 78 */ 79 bind_host(dom, sin) 80 char *dom; 81 struct sockaddr_in *sin; 82 { 83 struct hostent *hent = NULL; 84 struct ypbind_resp ypbr; 85 struct dom_binding *ysd; 86 struct timeval tv; 87 CLIENT *client; 88 int sock, r; 89 u_long ss_addr; 90 91 sock = RPC_ANYSOCK; 92 tv.tv_sec = 15; 93 tv.tv_usec = 0; 94 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 95 if(client==NULL) { 96 fprintf(stderr, "can't clntudp_create: %s\n", 97 yperr_string(YPERR_YPBIND)); 98 return YPERR_YPBIND; 99 } 100 101 tv.tv_sec = 5; 102 tv.tv_usec = 0; 103 r = clnt_call(client, YPBINDPROC_DOMAIN, 104 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 105 if( r != RPC_SUCCESS) { 106 fprintf(stderr, "can't clnt_call: %s\n", 107 yperr_string(YPERR_YPBIND)); 108 clnt_destroy(client); 109 return YPERR_YPBIND; 110 } else { 111 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 112 fprintf(stderr, "can't yp_bind: Reason: %s\n", 113 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error)); 114 clnt_destroy(client); 115 return r; 116 } 117 } 118 clnt_destroy(client); 119 120 ss_addr = *(u_long *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 121 /*printf("%08x\n", ss_addr);*/ 122 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 123 if (hent) 124 printf("%s\n", hent->h_name); 125 else 126 printf("%s\n", inet_ntoa(ss_addr)); 127 return 0; 128 } 129 130 int 131 main(argc, argv) 132 char **argv; 133 { 134 char *domainname, *master, *map; 135 struct ypmaplist *ypml, *y; 136 extern char *optarg; 137 extern int optind; 138 struct hostent *hent; 139 struct sockaddr_in sin; 140 int notrans, mode, getmap; 141 int c, r, i; 142 143 yp_get_default_domain(&domainname); 144 145 map = NULL; 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(mode==0) { 169 switch(argc-optind) { 170 case 0: 171 bzero(&sin, sizeof sin); 172 sin.sin_family = AF_INET; 173 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 174 175 if(bind_host(domainname, &sin)) 176 exit(ERR_NOBINDING); 177 break; 178 case 1: 179 bzero(&sin, sizeof sin); 180 sin.sin_family = AF_INET; 181 if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) { 182 hent = gethostbyname(argv[optind]); 183 if(!hent) { 184 fprintf(stderr, "ypwhich: host %s unknown\n", 185 argv[optind]); 186 exit(ERR_NOSUCHHOST); 187 } 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 fprintf(stderr, "ypwhich: not running ypbind\n"); 216 exit(ERR_NOYPBIND); 217 default: 218 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 219 map, yperr_string(r)); 220 exit(ERR_NOMASTER); 221 } 222 exit(0); 223 } 224 225 ypml = NULL; 226 r = yp_maplist(domainname, &ypml); 227 switch(r) { 228 case 0: 229 for(y=ypml; y; ) { 230 ypml = y; 231 r = yp_master(domainname, ypml->map, &master); 232 switch(r) { 233 case 0: 234 printf("%s %s\n", ypml->map, master); 235 free(master); 236 break; 237 default: 238 fprintf(stderr, 239 "YP: can't find the master of %s: Reason: %s\n", 240 ypml->map, yperr_string(r)); 241 break; 242 } 243 y = ypml->next; 244 free(ypml); 245 } 246 break; 247 case YPERR_YPBIND: 248 fprintf(stderr, "ypwhich: not running ypbind\n"); 249 exit(ERR_NOYPBIND); 250 default: 251 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 252 domainname, yperr_string(r)); 253 exit(ERR_NOMASTER); 254 } 255 exit(0); 256 } 257