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 1.3 2003/10/04 20:36:55 hmp 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(void)
  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(char *dom, struct sockaddr_in *sin)
  88 {
  89         struct hostent *hent = NULL;
  90         struct ypbind_resp ypbr;
  91         struct timeval tv;
  92         CLIENT *client;
  93         int sock, r;
  94         struct in_addr ss_addr;
  95
  96         sock = RPC_ANYSOCK;
  97         tv.tv_sec = 15;
  98         tv.tv_usec = 0;
  99         client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
 100         if (client == NULL) {
 101                 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND));
 102                 return (YPERR_YPBIND);
 103         }
 104
 105         tv.tv_sec = 5;
 106         tv.tv_usec = 0;
 107         r = clnt_call(client, YPBINDPROC_DOMAIN,
 108                 xdr_domainname, &dom, xdr_ypbind_resp, &ypbr, tv);
 109         if (r != RPC_SUCCESS) {
 110                 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
 111                 clnt_destroy(client);
 112                 return (YPERR_YPBIND);
 113         } else {
 114                 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 115                         warnx("can't yp_bind: reason: %s",
 116                                 ypbinderr_string(ypbr.ypbind_resp_u.ypbind_error));
 117                         clnt_destroy(client);
 118                         return (r);
 119                 }
 120         }
 121         clnt_destroy(client);
 122
 123         ss_addr = *(struct in_addr *)ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 124         /*printf("%08x\n", ss_addr);*/
 125         hent = gethostbyaddr((char *)&ss_addr, sizeof(ss_addr), AF_INET);
 126         if (hent)
 127                 printf("%s\n", hent->h_name);
 128         else
 129                 printf("%s\n", inet_ntoa(ss_addr));
 130         return (0);
 131 }
 132
 133 int
 134 main(int argc, char **argv)
 135 {
 136         char *domainname = NULL, *master, *map = NULL;
 137         struct ypmaplist *ypml, *y;
 138         struct hostent *hent;
 139         struct sockaddr_in sin;
 140         int notrans, mode, getmap;
 141         int c, r, i;
 142
 143         getmap = notrans = mode = 0;
 144         while ((c = getopt(argc, argv, "xd:mt")) != -1)
 145                 switch (c) {
 146                 case 'x':
 147                         for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 148                                 printf("\"%s\" is an alias for \"%s\"\n",
 149                                         ypaliases[i].alias,
 150                                         ypaliases[i].name);
 151                         exit(0);
 152                 case 'd':
 153                         domainname = optarg;
 154                         break;
 155                 case 't':
 156                         notrans++;
 157                         break;
 158                 case 'm':
 159                         mode++;
 160                         break;
 161                 default:
 162                         usage();
 163                 }
 164
 165         if (!domainname)
 166                 yp_get_default_domain(&domainname);
 167
 168         if (mode == 0) {
 169                 switch (argc-optind) {
 170                 case 0:
 171                         bzero(&sin, sizeof sin);
 172                         sin.sin_family = AF_INET;
 173                         sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 174
 175                         if (bind_host(domainname, &sin))
 176                                 exit(ERR_NOBINDING);
 177                         break;
 178                 case 1:
 179                         bzero(&sin, sizeof sin);
 180                         sin.sin_family = AF_INET;
 181                         if ((sin.sin_addr.s_addr = inet_addr(argv[optind])) == -1) {
 182                                 hent = gethostbyname(argv[optind]);
 183                                 if (!hent)
 184                                         errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]);
 185                                 bcopy((char *)hent->h_addr_list[0],
 186                                         (char *)&sin.sin_addr, sizeof sin.sin_addr);
 187                         }
 188                         if (bind_host(domainname, &sin))
 189                                 exit(ERR_NOBINDING);
 190                         break;
 191                 default:
 192                         usage();
 193                 }
 194                 exit(0);
 195         }
 196
 197         if (argc-optind > 1)
 198                 usage();
 199
 200         if (argv[optind]) {
 201                 map = argv[optind];
 202                 for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++)
 203                         if (strcmp(map, ypaliases[i].alias) == 0)
 204                                 map = ypaliases[i].name;
 205                 r = yp_master(domainname, map, &master);
 206                 switch (r) {
 207                 case 0:
 208                         printf("%s\n", master);
 209                         free(master);
 210                         break;
 211                 case YPERR_YPBIND:
 212                         errx(ERR_NOYPBIND, "not running ypbind");
 213                 default:
 214                         errx(ERR_NOMASTER, "can't find master for map %s. reason: %s",
 215                                 map, yperr_string(r));
 216                 }
 217                 exit(0);
 218         }
 219
 220         ypml = NULL;
 221         r = yp_maplist(domainname, &ypml);
 222         switch (r) {
 223         case 0:
 224                 for (y = ypml; y;) {
 225                         ypml = y;
 226                         r = yp_master(domainname, ypml->map, &master);
 227                         switch (r) {
 228                         case 0:
 229                                 printf("%s %s\n", ypml->map, master);
 230                                 free(master);
 231                                 break;
 232                         default:
 233                                 warnx("can't find the master of %s: reason: %s",
 234                                         ypml->map, yperr_string(r));
 235                                 break;
 236                         }
 237                         y = ypml->next;
 238                         free(ypml);
 239                 }
 240                 break;
 241         case YPERR_YPBIND:
 242                 errx(ERR_NOYPBIND, "not running ypbind");
 243         default:
 244                 errx(ERR_NOMASTER, "can't get map list for domain %s. reason: %s",
 245                         domainname, yperr_string(r));
 246         }
 247         exit(0);
 248 }