1 /* $NetBSD: yp_master.c,v 1.15 2012/06/25 22:32:46 abs Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #if defined(LIBC_SCCS) && !defined(lint) 31 __RCSID("$NetBSD: yp_master.c,v 1.15 2012/06/25 22:32:46 abs Exp $"); 32 #endif 33 34 #include "namespace.h" 35 #include <string.h> 36 #include <stdlib.h> 37 #include <rpc/rpc.h> 38 #include <rpcsvc/yp_prot.h> 39 #include <rpcsvc/ypclnt.h> 40 #include "local.h" 41 42 extern struct timeval _yplib_timeout; 43 extern int _yplib_nerrs; 44 extern int _yplib_bindtries; 45 46 #ifdef __weak_alias 47 __weak_alias(yp_master,_yp_master) 48 #endif 49 50 int 51 yp_master(const char *indomain, const char *inmap, char **outname) 52 { 53 struct dom_binding *ysd; 54 struct ypresp_master yprm; 55 struct ypreq_nokey yprnk; 56 int r, nerrs = 0; 57 58 if (outname == NULL) 59 return YPERR_BADARGS; 60 *outname = NULL; 61 62 if (_yp_invalid_domain(indomain)) 63 return YPERR_BADARGS; 64 if (inmap == NULL || *inmap == '\0' 65 || strlen(inmap) > YPMAXMAP) 66 return YPERR_BADARGS; 67 68 again: 69 if (_yp_dobind(indomain, &ysd) != 0) 70 return YPERR_DOMAIN; 71 72 yprnk.domain = indomain; 73 yprnk.map = inmap; 74 75 (void)memset(&yprm, 0, sizeof yprm); 76 77 r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_MASTER, 78 (xdrproc_t)xdr_ypreq_nokey, &yprnk, 79 (xdrproc_t)xdr_ypresp_master, &yprm, _yplib_timeout); 80 if (r != RPC_SUCCESS) { 81 if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) { 82 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 83 nerrs = 0; 84 } else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries) 85 return YPERR_YPSERV; 86 ysd->dom_vers = -1; 87 goto again; 88 } 89 if (!(r = ypprot_err(yprm.status))) { 90 if ((*outname = strdup(yprm.master)) == NULL) 91 r = YPERR_RESRC; 92 } 93 xdr_free((xdrproc_t)xdr_ypresp_master, (char *)(void *)&yprm); 94 __yp_unbind(ysd); 95 if (r != 0) { 96 if (*outname) { 97 free(*outname); 98 *outname = NULL; 99 } 100 } 101 return r; 102 } 103