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 1.11.2.1 2002/02/15 00:46:56 des Exp $
  30  * $DragonFly: src/usr.bin/ypwhich/ypwhich.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/socket.h>
  36 #include <netinet/in.h>
  37 #include <arpa/inet.h>
  38 #include <ctype.h>
  39 #include <err.h>
  40 #include <netdb.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include <rpc/rpc.h>
  46 #include <rpc/xdr.h>
  47 #include <rpcsvc/yp.h>
  48 struct dom_binding{};
  49 #include <rpcsvc/ypclnt.h>
  50
  51 #define ERR_USAGE       1       /* bad arguments - display 'usage' message */
  52 #define ERR_NOSUCHHOST  2       /* no such host */
  53 #define ERR_NOBINDING   3       /* error from ypbind -- domain not bound */
  54 #define ERR_NOYPBIND    4       /* ypbind not running */
  55 #define ERR_NOMASTER    5       /* could not find master server */
  56
  57 extern bool_t xdr_domainname();
  58
  59 struct ypalias {
  60         char *alias, *name;
  61 } ypaliases[] = {
  62         { "passwd", "passwd.byname" },
  63         { "master.passwd", "master.passwd.byname" },
  64         { "group", "group.byname" },
  65         { "networks", "networks.byaddr" },
  66         { "hosts", "hosts.byaddr" },
  67         { "protocols", "protocols.bynumber" },
  68         { "services", "services.byname" },
  69         { "aliases", "mail.aliases" },
  70         { "ethers", "ethers.byname" },
  71 };
  72
  73 static void
  74 usage()
  75 {
  76         fprintf(stderr, "%s\n%s\n",
  77                 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]",
  78                 "       ypwhich -x");
  79         exit(ERR_USAGE);
  80 }
  81
  82
  83 /*
  84  * Like yp_bind except can query a specific host
  85  */
  86 int
  87 bind_host(dom, sin)
  88 char *dom;
  89 struct sockaddr_in *sin;
  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(sin, 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                 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv);
 111         if (r != RPC_SUCCESS) {
 112                 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
 113                 clnt_destroy(client);
 114                 return (YPERR_YPBIND);
 115         } else {
 116                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 117                         warnx("can't yp_bind: reason: %s",
 118                                 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error));
 119                         clnt_destroy(client);
 120                         return (r);
 121                 }
 122         }
 123         clnt_destroy(client);
 124
 125         ss_addr = *(struct in_addr *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 126         /*printf("%08x\n", ss_addr);*/
 127         hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET);
 128         if (hent)
 129                 printf("%s\n", hent->h_name);
 130         else
 131                 printf("%s\n", inet_ntoa(ss_addr));
 132         return (0);
 133 }
 134
 135 int
 136 main(argc, argv)
 137 char **argv;
 138 {
 139         char *domainname = NULL, *master, *map = NULL;
 140         struct ypmaplist *ypml, *y;
 141         struct hostent *hent;
 142         struct sockaddr_in sin;
 143         int notrans, mode, getmap;
 144         int c, r, i;
 145
 146         getmap = notrans = mode = 0;
 147         while ((c = getopt(argc, argv, "xd:mt")) != -1)
 148                 switch (c) {
 149                 case 'x':
 150                         for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 151                                 printf("\"%s\" is an alias for \"%s\"\n",
 152                                         ypaliases[i].alias,
 153                                         ypaliases[i].name);
 154                         exit(0);
 155                 case 'd':
 156                         domainname = optarg;
 157                         break;
 158                 case 't':
 159                         notrans++;
 160                         break;
 161                 case 'm':
 162                         mode++;
 163                         break;
 164                 default:
 165                         usage();
 166                 }
 167
 168         if (!domainname)
 169                 yp_get_default_domain(&domainname);
 170
 171         if (mode == 0) {
 172                 switch (argc-optind) {
 173                 case 0:
 174                         bzero(&sin, sizeof sin);
 175                         sin.sin_family = AF_INET;
 176                         sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 177
 178                         if (bind_host(domainname, &sin))
 179                                 exit(ERR_NOBINDING);
 180                         break;
 181                 case 1:
 182                         bzero(&sin, sizeof sin);
 183                         sin.sin_family = AF_INET;
 184                         if ((sin.sin_addr.s_addr = inet_addr(argv[optind])) == -1) {
 185                                 hent = gethostbyname(argv[optind]);
 186                                 if (!hent)
 187                                         errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
 188                                 bcopy((char *)hent->h_addr_list[0],
 189                                         (char *)&sin.sin_addr, sizeof sin.sin_addr);
 190                         }
 191                         if (bind_host(domainname, &sin))
 192                                 exit(ERR_NOBINDING);
 193                         break;
 194                 default:
 195                         usage();
 196                 }
 197                 exit(0);
 198         }
 199
 200         if (argc-optind > 1)
 201                 usage();
 202
 203         if (argv[optind]) {
 204                 map = argv[optind];
 205                 for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 206                         if (strcmp(map, ypaliases[i].alias) == 0)
 207                                 map = ypaliases[i].name;
 208                 r = yp_master(domainname, map, &master);
 209                 switch (r) {
 210                 case 0:
 211                         printf("%s\n", master);
 212                         free(master);
 213                         break;
 214                 case YPERR_YPBIND:
 215                         errx(ERR_NOYPBIND, "not running ypbind");
 216                 default:
 217                         errx(ERR_NOMASTER, "can't find master for map %s. reason: %s",
 218                                 map, yperr_string(r));
 219                 }
 220                 exit(0);
 221         }
 222
 223         ypml = NULL;
 224         r = yp_maplist(domainname, &ypml);
 225         switch (r) {
 226         case 0:
 227                 for (y = ypml; y;) {
 228                         ypml = y;
 229                         r = yp_master(domainname, ypml->map, &master);
 230                         switch (r) {
 231                         case 0:
 232                                 printf("%s %s\n", ypml->map, master);
 233                                 free(master);
 234                                 break;
 235                         default:
 236                                 warnx("can't find the master of %s: reason: %s",
 237                                         ypml->map, yperr_string(r));
 238                                 break;
 239                         }
 240                         y = ypml->next;
 241                         free(ypml);
 242                 }
 243                 break;
 244         case YPERR_YPBIND:
 245                 errx(ERR_NOYPBIND, "not running ypbind");
 246         default:
 247                 errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s",
 248                         domainname, yperr_string(r));
 249         }
 250         exit(0);
 251 }