usr.bin/ypwhich/ypwhich.c

   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_prot.h>
  43 #include <rpcsvc/ypclnt.h>
  44
  45 extern bool_t xdr_domainname();
  46
  47 struct ypalias {
  48         char *alias, *name;
  49 } ypaliases[] = {
  50         { "passwd", "passwd.byname" },
  51         { "group", "group.byname" },
  52         { "networks", "networks.byaddr" },
  53         { "hosts", "hosts.byaddr" },
  54         { "protocols", "protocols.bynumber" },
  55         { "services", "services.byname" },
  56         { "aliases", "mail.aliases" },
  57         { "ethers", "ethers.byname" },
  58 };
  59
  60 usage()
  61 {
  62         fprintf(stderr, "Usage:\n");
  63         fprintf(stderr, "\typwhich [-d domain] [[-t] -m [mname] | host]\n");
  64         fprintf(stderr, "\typwhich -x\n");
  65         exit(1);
  66 }
  67
  68
  69 /*
  70  * Like yp_bind except can query a specific host
  71  */
  72 bind_host(dom, sin)
  73 char *dom;
  74 struct sockaddr_in *sin;
  75 {
  76         struct hostent *hent = NULL;
  77         struct ypbind_resp ypbr;
  78         struct dom_binding *ysd;
  79         struct timeval tv;
  80         CLIENT *client;
  81         int sock, r;
  82         u_long ss_addr;
  83
  84         sock = RPC_ANYSOCK;
  85         tv.tv_sec = 15;
  86         tv.tv_usec = 0;
  87         client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
  88         if(client==NULL) {
  89                 fprintf(stderr, "can't clntudp_create: %s\n",
  90                         yperr_string(YPERR_YPBIND));
  91                 return YPERR_YPBIND;
  92         }
  93
  94         tv.tv_sec = 5;
  95         tv.tv_usec = 0;
  96         r = clnt_call(client, YPBINDPROC_DOMAIN,
  97                 xdr_domainname, dom, xdr_ypbind_resp, &ypbr, tv);
  98         if( r != RPC_SUCCESS) {
  99                 fprintf(stderr, "can't clnt_call: %s\n",
 100                         yperr_string(YPERR_YPBIND));
 101                 clnt_destroy(client);
 102                 return YPERR_YPBIND;
 103         } else {
 104                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 105                         fprintf(stderr, "can't yp_bind: Reason: %s\n",
 106                                 yperr_string(ypbr.ypbind_status));
 107                         clnt_destroy(client);
 108                         return r;
 109                 }
 110         }
 111         clnt_destroy(client);
 112
 113         ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr.s_addr;
 114         /*printf("%08x\n", ss_addr);*/
 115         hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET);
 116         if (hent)
 117                 printf("%s\n", hent->h_name);
 118         else
 119                 printf("%s\n", inet_ntoa(ss_addr));
 120         return 0;
 121 }
 122
 123 int
 124 main(argc, argv)
 125 char **argv;
 126 {
 127         char *domainname, *master, *map;
 128         struct ypmaplist *ypml, *y;
 129         extern char *optarg;
 130         extern int optind;
 131         struct hostent *hent;
 132         struct sockaddr_in sin;
 133         int notrans, mode, getmap;
 134         int c, r, i;
 135
 136         yp_get_default_domain(&domainname);
 137
 138         map = NULL;
 139         getmap = notrans = mode = 0;
 140         while( (c=getopt(argc, argv, "xd:mt")) != -1)
 141                 switch(c) {
 142                 case 'x':
 143                         for(i=0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 144                                 printf("Use \"%s\" for \"%s\"\n",
 145                                         ypaliases[i].alias,
 146                                         ypaliases[i].name);
 147                         exit(0);
 148                 case 'd':
 149                         domainname = optarg;
 150                         break;
 151                 case 't':
 152                         notrans++;
 153                         break;
 154                 case 'm':
 155                         mode++;
 156                         break;
 157                 default:
 158                         usage();
 159                 }
 160
 161         if(mode==0) {
 162                 switch(argc-optind) {
 163                 case 0:
 164                         bzero(&sin, sizeof sin);
 165                         sin.sin_family = AF_INET;
 166                         sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 167
 168                         if(bind_host(domainname, &sin))
 169                                 exit(1);
 170                         break;
 171                 case 1:
 172                         bzero(&sin, sizeof sin);
 173                         sin.sin_family = AF_INET;
 174                         if( (sin.sin_addr.s_addr=inet_addr(argv[optind]))==-1) {
 175                                 hent = gethostbyname(argv[optind]);
 176                                 if(!hent) {
 177                                         fprintf(stderr, "ypwhich: host %s unknown\n",
 178                                                 argv[optind]);
 179                                         exit(1);
 180                                 }
 181                                 bcopy((char *)hent->h_addr_list[0],
 182                                         (char *)&sin.sin_addr, sizeof sin.sin_addr);
 183                         }
 184                         if(bind_host(domainname, &sin))
 185                                 exit(1);
 186                         break;
 187                 default:
 188                         usage();
 189                 }
 190                 exit(0);
 191         }
 192
 193         if( argc-optind > 1)
 194                 usage();
 195
 196         if(argv[optind]) {
 197                 map = argv[optind];
 198                 for(i=0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 199                         if( strcmp(map, ypaliases[i].alias) == 0)
 200                                 map = ypaliases[i].name;
 201                 r = yp_master(domainname, map, &master);
 202                 switch(r) {
 203                 case 0:
 204                         printf("%s\n", master);
 205                         free(master);
 206                         break;
 207                 case YPERR_YPBIND:
 208                         fprintf(stderr, "ypwhich: not running ypbind\n");
 209                         exit(1);
 210                 default:
 211                         fprintf(stderr, "Can't find master for map %s. Reason: %s\n",
 212                                 map, yperr_string(r));
 213                         exit(1);
 214                 }
 215                 exit(0);
 216         }
 217
 218         ypml = NULL;
 219         r = yp_maplist(domainname, &ypml);
 220         switch(r) {
 221         case 0:
 222                 for(y=ypml; y; ) {
 223                         ypml = y;
 224                         r = yp_master(domainname, ypml->ypml_name, &master);
 225                         switch(r) {
 226                         case 0:
 227                                 printf("%s %s\n", ypml->ypml_name, master);
 228                                 free(master);
 229                                 break;
 230                         default:
 231                                 fprintf(stderr,
 232                                         "YP: can't find the master of %s: Reason: %s\n",
 233                                         ypml->ypml_name, yperr_string(r));
 234                                 break;
 235                         }
 236                         y = ypml->ypml_next;
 237                         free(ypml);
 238                 }
 239                 break;
 240         case YPERR_YPBIND:
 241                 fprintf(stderr, "ypwhich: not running ypbind\n");
 242                 exit(1);
 243         default:
 244                 fprintf(stderr, "Can't get map list for domain %s. Reason: %s\n",
 245                         domainname, yperr_string(r));
 246                 exit(1);
 247         }
 248         exit(0);
 249 }