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 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <sys/socket.h> 42 43 #include <arpa/inet.h> 44 #include <netinet/in.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 <time.h> 53 #include <unistd.h> 54 55 #include <rpc/rpc.h> 56 #include <rpc/xdr.h> 57 #include <rpcsvc/yp_prot.h> 58 #include <rpcsvc/ypclnt.h> 59 60 static void 61 usage(void) 62 { 63 fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n"); 64 exit(1); 65 } 66 67 static int 68 get_remote_info(char *indomain, char *inmap, char *server, int *outorder, 69 char **outname) 70 { 71 struct ypresp_order ypro; 72 struct ypresp_master yprm; 73 struct ypreq_nokey yprnk; 74 struct timeval tv; 75 struct sockaddr_in rsrv_sin; 76 int rsrv_sock; 77 CLIENT *client; 78 struct hostent *h; 79 int r; 80 81 bzero((char *)&rsrv_sin, sizeof rsrv_sin); 82 rsrv_sin.sin_len = sizeof rsrv_sin; 83 rsrv_sin.sin_family = AF_INET; 84 rsrv_sock = RPC_ANYSOCK; 85 86 h = gethostbyname(server); 87 if (h == NULL) { 88 if (inet_aton(server, &rsrv_sin.sin_addr) == 0) 89 errx(1, "unknown host %s.", server); 90 } else 91 rsrv_sin.sin_addr.s_addr = *(u_int32_t *)h->h_addr; 92 93 tv.tv_sec = 10; 94 tv.tv_usec = 0; 95 96 client = clntudp_create(&rsrv_sin, YPPROG, YPVERS, tv, &rsrv_sock); 97 if (client == NULL) 98 errx(1, "clntudp_create: no contact with host %s.", server); 99 100 yprnk.domain = indomain; 101 yprnk.map = inmap; 102 103 bzero((char *)(char *)&ypro, sizeof ypro); 104 105 r = clnt_call(client, YPPROC_ORDER, (xdrproc_t)xdr_ypreq_nokey, &yprnk, 106 (xdrproc_t)xdr_ypresp_order, &ypro, tv); 107 if (r != RPC_SUCCESS) 108 clnt_perror(client, "yp_order: clnt_call"); 109 110 *outorder = ypro.ordernum; 111 xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro); 112 113 r = ypprot_err(ypro.status); 114 if (r == RPC_SUCCESS) { 115 bzero((char *)&yprm, sizeof yprm); 116 117 r = clnt_call(client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey, 118 &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv); 119 if (r != RPC_SUCCESS) 120 clnt_perror(client, "yp_master: clnt_call"); 121 r = ypprot_err(yprm.status); 122 if (r == 0) 123 *outname = (char *)strdup(yprm.master); 124 xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm); 125 } 126 clnt_destroy(client); 127 return (r); 128 } 129 130 int 131 main(int argc, char *argv[]) 132 { 133 char *domainname, *hostname = NULL, *inmap, *master; 134 int order, c, r; 135 time_t torder; 136 137 yp_get_default_domain(&domainname); 138 139 while ((c = getopt(argc, argv, "h:d:")) != -1) 140 switch (c) { 141 case 'd': 142 domainname = optarg; 143 break; 144 case 'h': 145 hostname = optarg; 146 break; 147 default: 148 usage(); 149 /*NOTREACHED*/ 150 } 151 152 if (optind + 1 != argc) 153 usage(); 154 inmap = argv[optind]; 155 156 if (hostname != NULL) { 157 r = get_remote_info(domainname, inmap, hostname, 158 &order, &master); 159 } else { 160 r = yp_order(domainname, inmap, &order); 161 if (r == 0) 162 r = yp_master(domainname, inmap, &master); 163 } 164 165 if (r != 0) 166 errx(1, "no such map %s: reason: %s", 167 inmap, yperr_string(r)); 168 169 torder = order; 170 printf("Map %s has order number %lld. %s", inmap, 171 (long long)order, ctime(&torder)); 172 printf("The master server is %s.\n", master); 173 174 exit(0); 175 } 176