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280 lines
6.4 KiB
C
280 lines
6.4 KiB
C
/* $OpenBSD: ypwhich.c,v 1.23 2015/02/08 23:40:35 deraadt Exp $ */
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/* $NetBSD: ypwhich.c,v 1.6 1996/05/13 02:43:48 thorpej Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include <rpc/xdr.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "yplib_host.h"
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static const struct ypalias {
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char *alias, *name;
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} ypaliases[] = {
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{ "passwd", "passwd.byname" },
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{ "master.passwd", "master.passwd.byname" },
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{ "shadow", "shadow.byname" },
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{ "group", "group.byname" },
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{ "networks", "networks.byaddr" },
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{ "hosts", "hosts.byaddr" },
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{ "protocols", "protocols.bynumber" },
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{ "services", "services.byname" },
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{ "aliases", "mail.aliases" },
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{ "ethers", "ethers.byname" },
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};
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: ypwhich [-t] [-d domain] [[-h] host]\n"
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" ypwhich [-t] [-d domain] [-h host] -m [mname]\n"
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" ypwhich -x\n");
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exit(1);
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}
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/*
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* Like yp_bind except can query a specific host
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*/
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static int
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bind_host(char *dom, struct sockaddr_in *sin)
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{
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struct hostent *hent = NULL;
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struct ypbind_resp ypbr;
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struct in_addr ss_addr;
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struct timeval tv;
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CLIENT *client;
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int sock, r;
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sock = RPC_ANYSOCK;
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tv.tv_sec = 15;
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tv.tv_usec = 0;
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client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
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if (client == NULL) {
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warnx("host is not bound to a ypmaster");
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return (YPERR_YPBIND);
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}
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tv.tv_sec = 5;
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tv.tv_usec = 0;
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r = clnt_call(client, YPBINDPROC_DOMAIN,
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(xdrproc_t)xdr_domainname, &dom,
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(xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
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if (r != RPC_SUCCESS) {
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warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND));
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clnt_destroy(client);
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return (YPERR_YPBIND);
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} else {
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if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
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warnx("can't yp_bind: reason: %s",
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yperr_string(ypbr.ypbind_status));
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clnt_destroy(client);
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return (r);
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}
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}
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clnt_destroy(client);
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memmove(&ss_addr.s_addr, &ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
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sizeof (ss_addr));
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hent = gethostbyaddr((char *)&ss_addr.s_addr, sizeof(ss_addr.s_addr),
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AF_INET);
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if (hent != NULL)
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printf("%s\n", hent->h_name);
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else
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printf("%s\n", inet_ntoa(ss_addr));
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return (0);
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}
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int
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main(int argc, char *argv[])
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{
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char *domain, *master, *map = NULL, *host = NULL;
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int notrans = 0, mode = 0, c, r, i;
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struct ypmaplist *ypml, *y;
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struct sockaddr_in sin;
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struct hostent *hent;
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CLIENT *client = NULL;
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yp_get_default_domain(&domain);
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if (domain == NULL)
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errx(1, "YP domain name not set");
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while ((c = getopt(argc, argv, "xd:h:mt")) != -1)
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switch (c) {
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case 'x':
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for (i = 0; i < nitems(ypaliases); i++)
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printf("\"%s\" is an alias for \"%s\"\n",
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ypaliases[i].alias,
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ypaliases[i].name);
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exit(0);
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case 'h':
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host = optarg;
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break;
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case 'd':
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domain = optarg;
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break;
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case 't':
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notrans = 1;
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break;
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case 'm':
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mode = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (mode == 0) {
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switch (argc) {
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case 0:
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memset(&sin, 0, sizeof sin);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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if (bind_host(domain, &sin))
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exit(1);
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break;
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case 1:
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bzero(&sin, sizeof sin);
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sin.sin_family = AF_INET;
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if (inet_aton(argv[0], &sin.sin_addr) == 0) {
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hent = gethostbyname(argv[0]);
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if (!hent) {
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errx(1, "host %s unknown",
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argv[0]);
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}
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}
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if (bind_host(domain, &sin))
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exit(1);
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break;
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default:
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usage();
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}
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exit(0);
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}
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if (argc > 1)
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usage();
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if (host != NULL)
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client = yp_bind_host(host, YPPROG, YPVERS, 0, 1);
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if (argv[0]) {
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map = argv[0];
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if (notrans == 0) {
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for (i = 0; i < nitems(ypaliases); i++)
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if (strcmp(map, ypaliases[i].alias) == 0)
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map = ypaliases[i].name;
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}
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if (host != NULL)
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r = yp_master_host(client, domain, map, &master);
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else
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r = yp_master(domain, map, &master);
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switch (r) {
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case 0:
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printf("%s\n", master);
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free(master);
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break;
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case YPERR_YPBIND:
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errx(1, "not running ypbind");
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default:
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errx(1, "can't find master for map %s: reason: %s",
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map, yperr_string(r));
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}
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exit(0);
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}
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ypml = NULL;
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if (host != NULL)
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r = yp_maplist_host(client, domain, &ypml);
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else
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r = yp_maplist(domain, &ypml);
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r = 0;
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switch (r) {
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case 0:
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for (y = ypml; y; ) {
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ypml = y;
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if (host != NULL) {
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r = yp_master_host(client,
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domain, ypml->map, &master);
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} else {
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r = yp_master(domain, ypml->map, &master);
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}
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switch (r) {
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case 0:
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printf("%s %s\n", ypml->map, master);
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free(master);
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break;
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default:
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warnx("can't find the master of %s: reason: %s",
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ypml->map, yperr_string(r));
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break;
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}
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y = ypml->next;
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free(ypml);
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}
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break;
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case YPERR_YPBIND:
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errx(1, "not running ypbind");
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default:
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errx(1, "can't get map list for domain %s: reason: %s",
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domain, yperr_string(r));
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}
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exit(0);
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}
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