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