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 { "master.passwd", "master.passwd.byname" }, 59 { "group", "group.byname" }, 60 { "networks", "networks.byaddr" }, 61 { "hosts", "hosts.byaddr" }, 62 { "protocols", "protocols.bynumber" }, 63 { "services", "services.byname" }, 64 { "aliases", "mail.aliases" }, 65 { "ethers", "ethers.byname" }, 66 }; 67 68 usage() 69 { 70 fprintf(stderr, "Usage:\n"); 71 fprintf(stderr, "\typwhich [-d domain] [[-t] -m [mname] | host]\n"); 72 fprintf(stderr, "\typwhich -x\n"); 73 exit(ERR_USAGE); 74 } 75 76 77 /* 78 * Like yp_bind except can query a specific host 79 */ 80 bind_host(dom, sin) 81 char *dom; 82 struct sockaddr_in *sin; 83 { 84 struct hostent *hent = NULL; 85 struct ypbind_resp ypbr; 86 struct dom_binding *ysd; 87 struct timeval tv; 88 CLIENT *client; 89 int sock, r; 90 u_long ss_addr; 91 92 sock = RPC_ANYSOCK; 93 tv.tv_sec = 15; 94 tv.tv_usec = 0; 95 client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock); 96 if(client==NULL) { 97 fprintf(stderr, "can't clntudp_create: %s\n", 98 yperr_string(YPERR_YPBIND)); 99 return YPERR_YPBIND; 100 } 101 102 tv.tv_sec = 5; 103 tv.tv_usec = 0; 104 r = clnt_call(client, YPBINDPROC_DOMAIN, 105 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv); 106 if( r != RPC_SUCCESS) { 107 fprintf(stderr, "can't clnt_call: %s\n", 108 yperr_string(YPERR_YPBIND)); 109 clnt_destroy(client); 110 return YPERR_YPBIND; 111 } else { 112 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 113 fprintf(stderr, "can't yp_bind: Reason: %s\n", 114 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error)); 115 clnt_destroy(client); 116 return r; 117 } 118 } 119 clnt_destroy(client); 120 121 ss_addr = *(u_long *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr; 122 /*printf("%08x\n", ss_addr);*/ 123 hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET); 124 if (hent) 125 printf("%s\n", hent->h_name); 126 else 127 printf("%s\n", inet_ntoa(ss_addr)); 128 return 0; 129 } 130 131 int 132 main(argc, argv) 133 char **argv; 134 { 135 char *domainname, *master, *map; 136 struct ypmaplist *ypml, *y; 137 extern char *optarg; 138 extern int optind; 139 struct hostent *hent; 140 struct sockaddr_in sin; 141 int notrans, mode, getmap; 142 int c, r, i; 143 144 yp_get_default_domain(&domainname); 145 146 map = NULL; 147 getmap = notrans = mode = 0; 148 while( (c=getopt(argc, argv, "xd:mt")) != -1) 149 switch(c) { 150 case 'x': 151 for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 152 printf("\"%s\" is an alias for \"%s\"\n", 153 ypaliases[i].alias, 154 ypaliases[i].name); 155 exit(0); 156 case 'd': 157 domainname = optarg; 158 break; 159 case 't': 160 notrans++; 161 break; 162 case 'm': 163 mode++; 164 break; 165 default: 166 usage(); 167 } 168 169 if(mode==0) { 170 switch(argc-optind) { 171 case 0: 172 bzero(&sin, sizeof sin); 173 sin.sin_family = AF_INET; 174 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 175 176 if(bind_host(domainname, &sin)) 177 exit(ERR_NOBINDING); 178 break; 179 case 1: 180 bzero(&sin, sizeof sin); 181 sin.sin_family = AF_INET; 182 if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) { 183 hent = gethostbyname(argv[optind]); 184 if(!hent) { 185 fprintf(stderr, "ypwhich: host %s unknown\n", 186 argv[optind]); 187 exit(ERR_NOSUCHHOST); 188 } 189 bcopy((char *)hent->h_addr_list[0], 190 (char *)&sin.sin_addr, sizeof sin.sin_addr); 191 } 192 if(bind_host(domainname, &sin)) 193 exit(ERR_NOBINDING); 194 break; 195 default: 196 usage(); 197 } 198 exit(0); 199 } 200 201 if( argc-optind > 1) 202 usage(); 203 204 if(argv[optind]) { 205 map = argv[optind]; 206 for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 207 if( strcmp(map, ypaliases[i].alias) == 0) 208 map = ypaliases[i].name; 209 r = yp_master(domainname, map, &master); 210 switch(r) { 211 case 0: 212 printf("%s\n", master); 213 free(master); 214 break; 215 case YPERR_YPBIND: 216 fprintf(stderr, "ypwhich: not running ypbind\n"); 217 exit(ERR_NOYPBIND); 218 default: 219 fprintf(stderr, "Can't find master for map %s. Reason: %s\n", 220 map, yperr_string(r)); 221 exit(ERR_NOMASTER); 222 } 223 exit(0); 224 } 225 226 ypml = NULL; 227 r = yp_maplist(domainname, &ypml); 228 switch(r) { 229 case 0: 230 for(y=ypml; y; ) { 231 ypml = y; 232 r = yp_master(domainname, 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 fprintf(stderr, 240 "YP: can't find the master of %s: Reason: %s\n", 241 ypml->map, yperr_string(r)); 242 break; 243 } 244 y = ypml->next; 245 free(ypml); 246 } 247 break; 248 case YPERR_YPBIND: 249 fprintf(stderr, "ypwhich: not running ypbind\n"); 250 exit(ERR_NOYPBIND); 251 default: 252 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n", 253 domainname, yperr_string(r)); 254 exit(ERR_NOMASTER); 255 } 256 exit(0); 257 } 258