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  * $FreeBSD: src/usr.bin/ypwhich/ypwhich.c,v 1.16 2004/04/04 19:17:38 charnier Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35
  36 #include <rpc/rpc.h>
  37 #include <rpc/xdr.h>
  38 #include <rpcsvc/yp_prot.h>
  39 #include <rpcsvc/ypclnt.h>
  40
  41 #include <netinet/in.h>
  42
  43 #include <arpa/inet.h>
  44
  45 #include <ctype.h>
  46 #include <err.h>
  47 #include <netdb.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52
  53 #define ERR_USAGE       1       /* bad arguments - display 'usage' message */
  54 #define ERR_NOSUCHHOST  2       /* no such host */
  55 #define ERR_NOBINDING   3       /* error from ypbind -- domain not bound */
  56 #define ERR_NOYPBIND    4       /* ypbind not running */
  57 #define ERR_NOMASTER    5       /* could not find master server */
  58
  59 extern bool_t xdr_domainname();
  60
  61 static const struct ypalias {
  62         char *alias, *name;
  63 } ypaliases[] = {
  64         { "passwd", "passwd.byname" },
  65         { "master.passwd", "master.passwd.byname" },
  66         { "group", "group.byname" },
  67         { "networks", "networks.byaddr" },
  68         { "hosts", "hosts.byaddr" },
  69         { "protocols", "protocols.bynumber" },
  70         { "services", "services.byname" },
  71         { "aliases", "mail.aliases" },
  72         { "ethers", "ethers.byname" },
  73 };
  74
  75 static void
  76 usage(void)
  77 {
  78         fprintf(stderr, "%s\n%s\n",
  79                 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]",
  80                 "       ypwhich -x");
  81         exit(ERR_USAGE);
  82 }
  83
  84
  85 /*
  86  * Like yp_bind except can query a specific host
  87  */
  88 static int
  89 bind_host(char *dom, struct sockaddr_in *lsin)
  90 {
  91         struct hostent *hent = NULL;
  92         struct ypbind_resp ypbr;
  93         struct timeval tv;
  94         CLIENT *client;
  95         int sock, r;
  96         struct in_addr ss_addr;
  97
  98         sock = RPC_ANYSOCK;
  99         tv.tv_sec = 15;
 100         tv.tv_usec = 0;
 101         client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock);
 102         if (client == NULL) {
 103                 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND));
 104                 return (YPERR_YPBIND);
 105         }
 106
 107         tv.tv_sec = 5;
 108         tv.tv_usec = 0;
 109         r = clnt_call(client, YPBINDPROC_DOMAIN,
 110                 (xdrproc_t)xdr_domainname, &dom,
 111                 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
 112         if (r != RPC_SUCCESS) {
 113                 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
 114                 clnt_destroy(client);
 115                 return (YPERR_YPBIND);
 116         } else {
 117                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 118                         warnx("can't yp_bind: reason: %s",
 119                                 ypbinderr_string(ypbr.ypbind_respbody.ypbind_error));
 120                         clnt_destroy(client);
 121                         return (r);
 122                 }
 123         }
 124         clnt_destroy(client);
 125
 126         ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr;
 127         /*printf("%08x\n", ss_addr);*/
 128         hent = gethostbyaddr(&ss_addr, sizeof(ss_addr), AF_INET);
 129         if (hent)
 130                 printf("%s\n", hent->h_name);
 131         else
 132                 printf("%s\n", inet_ntoa(ss_addr));
 133         return (0);
 134 }
 135
 136 int
 137 main(int argc, char *argv[])
 138 {
 139         char *domnam = NULL, *master;
 140         char *map = NULL;
 141         struct ypmaplist *ypml, *y;
 142         struct hostent *hent;
 143         struct sockaddr_in lsin;
 144         int notrans, mode;
 145         int c, r;
 146         u_int i;
 147
 148         notrans = mode = 0;
 149         while ((c = getopt(argc, argv, "xd:mt")) != -1)
 150                 switch (c) {
 151                 case 'x':
 152                         for (i = 0; i < NELEM(ypaliases); i++)
 153                                 printf("\"%s\" is an alias for \"%s\"\n",
 154                                         ypaliases[i].alias,
 155                                         ypaliases[i].name);
 156                         exit(0);
 157                 case 'd':
 158                         domnam = optarg;
 159                         break;
 160                 case 't':
 161                         notrans++;
 162                         break;
 163                 case 'm':
 164                         mode++;
 165                         break;
 166                 default:
 167                         usage();
 168                 }
 169
 170         if (!domnam)
 171                 yp_get_default_domain(&domnam);
 172
 173         if (mode == 0) {
 174                 switch (argc-optind) {
 175                 case 0:
 176                         bzero(&lsin, sizeof lsin);
 177                         lsin.sin_family = AF_INET;
 178                         lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 179
 180                         if (bind_host(domnam, &lsin))
 181                                 exit(ERR_NOBINDING);
 182                         break;
 183                 case 1:
 184                         bzero(&lsin, sizeof lsin);
 185                         lsin.sin_family = AF_INET;
 186                         if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) {
 187                                 hent = gethostbyname(argv[optind]);
 188                                 if (!hent)
 189                                         errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
 190                                 bcopy((char *)hent->h_addr_list[0],
 191                                         (char *)&lsin.sin_addr, sizeof lsin.sin_addr);
 192                         }
 193                         if (bind_host(domnam, &lsin))
 194                                 exit(ERR_NOBINDING);
 195                         break;
 196                 default:
 197                         usage();
 198                 }
 199                 exit(0);
 200         }
 201
 202         if (argc-optind > 1)
 203                 usage();
 204
 205         if (argv[optind]) {
 206                 map = argv[optind];
 207                 for (i = 0; (!notrans) && i < NELEM(ypaliases); i++)
 208                         if (strcmp(map, ypaliases[i].alias) == 0)
 209                                 map = ypaliases[i].name;
 210                 r = yp_master(domnam, map, &master);
 211                 switch (r) {
 212                 case 0:
 213                         printf("%s\n", master);
 214                         free(master);
 215                         break;
 216                 case YPERR_YPBIND:
 217                         errx(ERR_NOYPBIND, "not running ypbind");
 218                 default:
 219                         errx(ERR_NOMASTER, "can't find master for map %s: reason: %s",
 220                                 map, yperr_string(r));
 221                 }
 222                 exit(0);
 223         }
 224
 225         ypml = NULL;
 226         r = yp_maplist(domnam, &ypml);
 227         switch (r) {
 228         case 0:
 229                 for (y = ypml; y;) {
 230                         ypml = y;
 231                         r = yp_master(domnam, ypml->ypml_name, &master);
 232                         switch (r) {
 233                         case 0:
 234                                 printf("%s %s\n", ypml->ypml_name, master);
 235                                 free(master);
 236                                 break;
 237                         default:
 238                                 warnx("can't find the master of %s: reason: %s",
 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                 errx(ERR_NOYPBIND, "not running ypbind");
 248         default:
 249                 errx(ERR_NOMASTER, "can't get map list for domain %s: reason: %s",
 250                         domnam, yperr_string(r));
 251         }
 252         exit(0);
 253 }