usr.bin/ypwhich/ypwhich.c

   1 /*      $OpenBSD: ypwhich.c,v 1.23 2015/02/08 23:40:35 deraadt Exp $    */
   2 /*      $NetBSD: ypwhich.c,v 1.6 1996/05/13 02:43:48 thorpej Exp $      */
   3
   4 /*
   5  * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  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 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/socket.h>
  36
  37 #include <netinet/in.h>
  38 #include <arpa/inet.h>
  39
  40 #include <ctype.h>
  41 #include <err.h>
  42 #include <netdb.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47
  48 #include <rpc/rpc.h>
  49 #include <rpc/xdr.h>
  50 #include <rpcsvc/yp.h>
  51 #include <rpcsvc/ypclnt.h>
  52
  53 #include "yplib_host.h"
  54
  55 static const struct ypalias {
  56         char *alias, *name;
  57 } ypaliases[] = {
  58         { "passwd", "passwd.byname" },
  59         { "master.passwd", "master.passwd.byname" },
  60         { "shadow", "shadow.byname" },
  61         { "group", "group.byname" },
  62         { "networks", "networks.byaddr" },
  63         { "hosts", "hosts.byaddr" },
  64         { "protocols", "protocols.bynumber" },
  65         { "services", "services.byname" },
  66         { "aliases", "mail.aliases" },
  67         { "ethers", "ethers.byname" },
  68 };
  69
  70 static void
  71 usage(void)
  72 {
  73         fprintf(stderr,
  74             "usage: ypwhich [-t] [-d domain] [[-h] host]\n"
  75             "       ypwhich [-t] [-d domain] [-h host] -m [mname]\n"
  76             "       ypwhich -x\n");
  77         exit(1);
  78 }
  79
  80
  81 /*
  82  * Like yp_bind except can query a specific host
  83  */
  84 static int
  85 bind_host(char *dom, struct sockaddr_in *sin)
  86 {
  87         struct hostent *hent = NULL;
  88         struct ypbind_resp ypbr;
  89         struct in_addr ss_addr;
  90         struct timeval tv;
  91         CLIENT *client;
  92         int sock, r;
  93
  94         sock = RPC_ANYSOCK;
  95         tv.tv_sec = 15;
  96         tv.tv_usec = 0;
  97         client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
  98
  99         if (client == NULL) {
 100                 warnx("host is not bound to a ypmaster");
 101                 return (YPERR_YPBIND);
 102         }
 103
 104         tv.tv_sec = 5;
 105         tv.tv_usec = 0;
 106
 107         r = clnt_call(client, YPBINDPROC_DOMAIN,
 108                 (xdrproc_t)xdr_domainname, &dom,
 109                 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
 110         if (r != RPC_SUCCESS) {
 111                 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
 112                 clnt_destroy(client);
 113                 return (YPERR_YPBIND);
 114         } else {
 115                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 116                         warnx("can't yp_bind: reason: %s",
 117                             yperr_string(ypbr.ypbind_status));
 118                         clnt_destroy(client);
 119                         return (r);
 120                 }
 121         }
 122         clnt_destroy(client);
 123
 124         memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
 125             sizeof (ss_addr));
 126
 127         hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr),
 128             AF_INET);
 129         if (hent != NULL)
 130                 printf("%s\n", hent->h_name);
 131         else
 132                 printf("%s\n", inet_ntoa(ss_addr));
 133
 134         return (0);
 135 }
 136
 137 int
 138 main(int argc, char *argv[])
 139 {
 140         char *domain, *master, *map = NULL, *host = NULL;
 141         int notrans = 0, mode = 0, c, r, i;
 142         struct ypmaplist *ypml, *y;
 143         struct sockaddr_in sin;
 144         struct hostent *hent;
 145         CLIENT *client = NULL;
 146
 147         yp_get_default_domain(&domain);
 148         if (domain == NULL)
 149                 errx(1, "YP domain name not set");
 150
 151         while ((c = getopt(argc, argv, "xd:h:mt")) != -1)
 152                 switch (c) {
 153                 case 'x':
 154                         for (i = 0; i < nitems(ypaliases); i++)
 155                                 printf("\"%s\" is an alias for \"%s\"\n",
 156                                         ypaliases[i].alias,
 157                                         ypaliases[i].name);
 158                         exit(0);
 159                 case 'h':
 160                         host = optarg;
 161                         break;
 162                 case 'd':
 163                         domain = optarg;
 164                         break;
 165                 case 't':
 166                         notrans = 1;
 167                         break;
 168                 case 'm':
 169                         mode = 1;
 170                         break;
 171                 default:
 172                         usage();
 173                 }
 174         argc -= optind;
 175         argv += optind;
 176
 177         if (mode == 0) {
 178                 switch (argc) {
 179                 case 0:
 180                         memset(&sin, 0, sizeof sin);
 181                         sin.sin_family = AF_INET;
 182                         sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 183
 184                         if (bind_host(domain, &sin))
 185                                 exit(1);
 186                         break;
 187                 case 1:
 188                         bzero(&sin, sizeof sin);
 189                         sin.sin_family = AF_INET;
 190                         if (inet_aton(argv[0], &sin.sin_addr) == 0) {
 191                                 hent = gethostbyname(argv[0]);
 192                                 if (!hent) {
 193                                         errx(1, "host %s unknown",
 194                                             argv[0]);
 195                                 }
 196                         }
 197                         if (bind_host(domain, &sin))
 198                                 exit(1);
 199                         break;
 200                 default:
 201                         usage();
 202                 }
 203                 exit(0);
 204         }
 205
 206         if (argc > 1)
 207                 usage();
 208
 209         if (host != NULL)
 210                 client = yp_bind_host(host, YPPROG, YPVERS, 0, 1);
 211
 212         if (argv[0]) {
 213                 map = argv[0];
 214                 if (notrans == 0) {
 215                         for (i = 0; i < nitems(ypaliases); i++)
 216                                 if (strcmp(map, ypaliases[i].alias) == 0)
 217                                         map = ypaliases[i].name;
 218                 }
 219
 220                 if (host != NULL)
 221                         r = yp_master_host(client, domain, map, &master);
 222                 else
 223                         r = yp_master(domain, map, &master);
 224
 225                 switch (r) {
 226                 case 0:
 227                         printf("%s\n", master);
 228                         free(master);
 229                         break;
 230                 case YPERR_YPBIND:
 231                         errx(1, "not running ypbind");
 232                 default:
 233                         errx(1, "can't find master for map %s: reason: %s",
 234                             map, yperr_string(r));
 235                 }
 236                 exit(0);
 237         }
 238
 239         ypml = NULL;
 240         if (host != NULL)
 241                 r = yp_maplist_host(client, domain, &ypml);
 242         else
 243                 r = yp_maplist(domain, &ypml);
 244
 245         r = 0;
 246         switch (r) {
 247         case 0:
 248                 for (y = ypml; y; ) {
 249                         ypml = y;
 250                         if (host != NULL) {
 251                                 r = yp_master_host(client,
 252                                                    domain, ypml->map, &master);
 253                         } else {
 254                                 r = yp_master(domain, ypml->map, &master);
 255                         }
 256                         switch (r) {
 257                         case 0:
 258                                 printf("%s %s\n", ypml->map, master);
 259                                 free(master);
 260                                 break;
 261                         default:
 262                                 warnx("can't find the master of %s: reason: %s",
 263                                     ypml->map, yperr_string(r));
 264                                 break;
 265                         }
 266                         y = ypml->next;
 267                         free(ypml);
 268                 }
 269                 break;
 270         case YPERR_YPBIND:
 271                 errx(1, "not running ypbind");
 272         default:
 273                 errx(1, "can't get map list for domain %s: reason: %s",
 274                     domain, yperr_string(r));
 275         }
 276         exit(0);
 277 }