1 /* $OpenBSD: yppoll.c,v 1.15 2015/01/16 06:40:22 deraadt Exp $ */ 2 /* $NetBSD: yppoll.c,v 1.5 1996/05/13 02:46:36 thorpej Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@openbsd.org> 8 * Copyright (c) 1992, 1993 John Brezak 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 24 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 27 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 41 #include <arpa/inet.h> 42 #include <netinet/in.h> 43 44 #include <ctype.h> 45 #include <err.h> 46 #include <netdb.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <time.h> 51 #include <unistd.h> 52 53 #include <rpc/rpc.h> 54 #include <rpc/xdr.h> 55 #include <rpcsvc/yp_prot.h> 56 #include <rpcsvc/ypclnt.h> 57 58 static void 59 usage(void) 60 { 61 fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n"); 62 exit(1); 63 } 64 65 static int 66 get_remote_info(char *indomain, char *inmap, char *server, int *outorder, 67 char **outname) 68 { 69 struct ypresp_order ypro; 70 struct ypresp_master yprm; 71 struct ypreq_nokey yprnk; 72 struct timeval tv; 73 struct sockaddr_in rsrv_sin; 74 int rsrv_sock; 75 CLIENT *client; 76 struct hostent *h; 77 int r; 78 79 bzero((char *)&rsrv_sin, sizeof rsrv_sin); 80 rsrv_sin.sin_len = sizeof rsrv_sin; 81 rsrv_sin.sin_family = AF_INET; 82 rsrv_sock = RPC_ANYSOCK; 83 84 h = gethostbyname(server); 85 if (h == NULL) { 86 if (inet_aton(server, &rsrv_sin.sin_addr) == 0) 87 errx(1, "unknown host %s.", server); 88 } else 89 rsrv_sin.sin_addr.s_addr = *(u_int32_t *)h->h_addr; 90 91 tv.tv_sec = 10; 92 tv.tv_usec = 0; 93 94 client = clntudp_create(&rsrv_sin, YPPROG, YPVERS, tv, &rsrv_sock); 95 if (client == NULL) 96 errx(1, "clntudp_create: no contact with host %s.", server); 97 98 yprnk.domain = indomain; 99 yprnk.map = inmap; 100 101 bzero((char *)(char *)&ypro, sizeof ypro); 102 103 r = clnt_call(client, YPPROC_ORDER, (xdrproc_t)xdr_ypreq_nokey, &yprnk, 104 (xdrproc_t)xdr_ypresp_order, &ypro, tv); 105 if (r != RPC_SUCCESS) 106 clnt_perror(client, "yp_order: clnt_call"); 107 108 *outorder = ypro.ordernum; 109 xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro); 110 111 r = ypprot_err(ypro.status); 112 if (r == RPC_SUCCESS) { 113 bzero((char *)&yprm, sizeof yprm); 114 115 r = clnt_call(client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey, 116 &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv); 117 if (r != RPC_SUCCESS) 118 clnt_perror(client, "yp_master: clnt_call"); 119 r = ypprot_err(yprm.status); 120 if (r == 0) 121 *outname = (char *)strdup(yprm.master); 122 xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm); 123 } 124 clnt_destroy(client); 125 return (r); 126 } 127 128 int 129 main(int argc, char *argv[]) 130 { 131 char *domainname, *hostname = NULL, *inmap, *master; 132 int order, c, r; 133 time_t torder; 134 135 yp_get_default_domain(&domainname); 136 137 while ((c = getopt(argc, argv, "h:d:")) != -1) 138 switch (c) { 139 case 'd': 140 domainname = optarg; 141 break; 142 case 'h': 143 hostname = optarg; 144 break; 145 default: 146 usage(); 147 /*NOTREACHED*/ 148 } 149 150 if (optind + 1 != argc) 151 usage(); 152 inmap = argv[optind]; 153 154 if (hostname != NULL) { 155 r = get_remote_info(domainname, inmap, hostname, 156 &order, &master); 157 } else { 158 r = yp_order(domainname, inmap, &order); 159 if (r == 0) 160 r = yp_master(domainname, inmap, &master); 161 } 162 163 if (r != 0) 164 errx(1, "no such map %s: reason: %s", 165 inmap, yperr_string(r)); 166 167 torder = order; 168 printf("Map %s has order number %lld. %s", inmap, 169 (long long)order, ctime(&torder)); 170 printf("The master server is %s.\n", master); 171 172 exit(0); 173 } 174