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 #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 <rpc/rpc.h>
  38 #include <rpc/xdr.h>
  39 #include <rpcsvc/yp_prot.h>
  40 #include <rpcsvc/ypclnt.h>
  41
  42 #include <netinet/in.h>
  43
  44 #include <arpa/inet.h>
  45
  46 #include <ctype.h>
  47 #include <err.h>
  48 #include <netdb.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53
  54 #define ERR_USAGE       1       /* bad arguments - display 'usage' message */
  55 #define ERR_NOSUCHHOST  2       /* no such host */
  56 #define ERR_NOBINDING   3       /* error from ypbind -- domain not bound */
  57 #define ERR_NOYPBIND    4       /* ypbind not running */
  58 #define ERR_NOMASTER    5       /* could not find master server */
  59
  60 extern bool_t xdr_domainname();
  61
  62 struct ypalias {
  63         char *alias, *name;
  64 } ypaliases[] = {
  65         { "passwd", "passwd.byname" },
  66         { "master.passwd", "master.passwd.byname" },
  67         { "shadow", "shadow.byname" },
  68         { "group", "group.byname" },
  69         { "networks", "networks.byaddr" },
  70         { "hosts", "hosts.byaddr" },
  71         { "protocols", "protocols.bynumber" },
  72         { "services", "services.byname" },
  73         { "aliases", "mail.aliases" },
  74         { "ethers", "ethers.byname" },
  75 };
  76
  77 static void
  78 usage(void)
  79 {
  80         fprintf(stderr, "%s\n%s\n",
  81                 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]",
  82                 "       ypwhich -x");
  83         exit(ERR_USAGE);
  84 }
  85
  86
  87 /*
  88  * Like yp_bind except can query a specific host
  89  */
  90 static int
  91 bind_host(char *dom, struct sockaddr_in *lsin)
  92 {
  93         struct hostent *hent = NULL;
  94         struct ypbind_resp ypbr;
  95         struct timeval tv;
  96         CLIENT *client;
  97         int sock, r;
  98         struct in_addr ss_addr;
  99
 100         sock = RPC_ANYSOCK;
 101         tv.tv_sec = 15;
 102         tv.tv_usec = 0;
 103         client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock);
 104         if (client == NULL) {
 105                 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND));
 106                 return (YPERR_YPBIND);
 107         }
 108
 109         tv.tv_sec = 5;
 110         tv.tv_usec = 0;
 111         r = clnt_call(client, YPBINDPROC_DOMAIN,
 112                 (xdrproc_t)xdr_domainname, &dom,
 113                 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
 114         if (r != RPC_SUCCESS) {
 115                 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
 116                 clnt_destroy(client);
 117                 return (YPERR_YPBIND);
 118         } else {
 119                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 120                         warnx("can't yp_bind: reason: %s",
 121                                 ypbinderr_string(ypbr.ypbind_respbody.ypbind_error));
 122                         clnt_destroy(client);
 123                         return (r);
 124                 }
 125         }
 126         clnt_destroy(client);
 127
 128         ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr;
 129         /*printf("%08x\n", ss_addr);*/
 130         hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET);
 131         if (hent)
 132                 printf("%s\n", hent->h_name);
 133         else
 134                 printf("%s\n", inet_ntoa(ss_addr));
 135         return (0);
 136 }
 137
 138 int
 139 main(int argc, char *argv[])
 140 {
 141         char *domnam = NULL, *master;
 142         char *map = NULL;
 143         struct ypmaplist *ypml, *y;
 144         struct hostent *hent;
 145         struct sockaddr_in lsin;
 146         int notrans, mode;
 147         int c, r;
 148         u_int i;
 149
 150         notrans = mode = 0;
 151         while ((c = getopt(argc, argv, "xd:mt")) != -1)
 152                 switch (c) {
 153                 case 'x':
 154                         for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 155                                 printf("\"%s\" is an alias for \"%s\"\n",
 156                                         ypaliases[i].alias,
 157                                         ypaliases[i].name);
 158                         exit(0);
 159                 case 'd':
 160                         domnam = optarg;
 161                         break;
 162                 case 't':
 163                         notrans++;
 164                         break;
 165                 case 'm':
 166                         mode++;
 167                         break;
 168                 default:
 169                         usage();
 170                 }
 171
 172         if (!domnam)
 173                 yp_get_default_domain(&domnam);
 174
 175         if (mode == 0) {
 176                 switch (argc-optind) {
 177                 case 0:
 178                         bzero(&lsin, sizeof lsin);
 179                         lsin.sin_family = AF_INET;
 180                         lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 181
 182                         if (bind_host(domnam, &lsin))
 183                                 exit(ERR_NOBINDING);
 184                         break;
 185                 case 1:
 186                         bzero(&lsin, sizeof lsin);
 187                         lsin.sin_family = AF_INET;
 188                         if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) {
 189                                 hent = gethostbyname(argv[optind]);
 190                                 if (!hent)
 191                                         errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
 192                                 bcopy((char *)hent->h_addr_list[0],
 193                                         (char *)&lsin.sin_addr, sizeof lsin.sin_addr);
 194                         }
 195                         if (bind_host(domnam, &lsin))
 196                                 exit(ERR_NOBINDING);
 197                         break;
 198                 default:
 199                         usage();
 200                 }
 201                 exit(0);
 202         }
 203
 204         if (argc-optind > 1)
 205                 usage();
 206
 207         if (argv[optind]) {
 208                 map = argv[optind];
 209                 for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 210                         if (strcmp(map, ypaliases[i].alias) == 0)
 211                                 map = ypaliases[i].name;
 212                 r = yp_master(domnam, map, &master);
 213                 switch (r) {
 214                 case 0:
 215                         printf("%s\n", master);
 216                         free(master);
 217                         break;
 218                 case YPERR_YPBIND:
 219                         errx(ERR_NOYPBIND, "not running ypbind");
 220                 default:
 221                         errx(ERR_NOMASTER, "can't find master for map %s: reason: %s",
 222                                 map, yperr_string(r));
 223                 }
 224                 exit(0);
 225         }
 226
 227         ypml = NULL;
 228         r = yp_maplist(domnam, &ypml);
 229         switch (r) {
 230         case 0:
 231                 for (y = ypml; y;) {
 232                         ypml = y;
 233                         r = yp_master(domnam, ypml->ypml_name, &master);
 234                         switch (r) {
 235                         case 0:
 236                                 printf("%s %s\n", ypml->ypml_name, master);
 237                                 free(master);
 238                                 break;
 239                         default:
 240                                 warnx("can't find the master of %s: reason: %s",
 241                                         ypml->ypml_name, yperr_string(r));
 242                                 break;
 243                         }
 244                         y = ypml->ypml_next;
 245                         free(ypml);
 246                 }
 247                 break;
 248         case YPERR_YPBIND:
 249                 errx(ERR_NOYPBIND, "not running ypbind");
 250         default:
 251                 errx(ERR_NOMASTER, "can't get map list for domain %s: reason: %s",
 252                         domnam, yperr_string(r));
 253         }
 254         exit(0);
 255 }