minix/lib/libc/yp/yp_first.c

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/* $NetBSD: yp_first.c,v 1.16 2012/06/25 22:32:46 abs Exp $ */
/*
* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: yp_first.c,v 1.16 2012/06/25 22:32:46 abs Exp $");
#endif
#include "namespace.h"
#include <stdlib.h>
#include <string.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include "local.h"
extern struct timeval _yplib_timeout;
extern int _yplib_nerrs;
extern int _yplib_bindtries;
#ifdef __weak_alias
__weak_alias(yp_first,_yp_first)
__weak_alias(yp_next,_yp_next)
#endif
int
yp_first(const char *indomain, const char *inmap, char **outkey,
int *outkeylen, char **outval, int *outvallen)
{
struct ypresp_key_val yprkv;
struct ypreq_nokey yprnk;
struct dom_binding *ysd;
int r, nerrs = 0;
if (outkey == NULL || outkeylen == NULL || \
outval == NULL || outvallen == NULL)
return YPERR_BADARGS;
*outkey = *outval = NULL;
*outkeylen = *outvallen = 0;
if (_yp_invalid_domain(indomain))
return YPERR_BADARGS;
if (inmap == NULL || *inmap == '\0'
|| strlen(inmap) > YPMAXMAP)
return YPERR_BADARGS;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
yprnk.domain = indomain;
yprnk.map = inmap;
(void)memset(&yprkv, 0, sizeof yprkv);
r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_FIRST,
(xdrproc_t)xdr_ypreq_nokey,
&yprnk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, _yplib_timeout);
if (r != RPC_SUCCESS) {
if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) {
clnt_perror(ysd->dom_client, "yp_first: clnt_call");
nerrs = 0;
} else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries)
return YPERR_YPSERV;
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprkv.status))) {
*outkeylen = yprkv.keydat.dsize;
if ((*outkey = malloc((size_t)(*outkeylen + 1))) == NULL)
r = YPERR_RESRC;
else {
(void)memcpy(*outkey, yprkv.keydat.dptr,
(size_t)*outkeylen);
(*outkey)[*outkeylen] = '\0';
}
*outvallen = yprkv.valdat.dsize;
if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL)
r = YPERR_RESRC;
else {
(void)memcpy(*outval, yprkv.valdat.dptr,
(size_t)*outvallen);
(*outval)[*outvallen] = '\0';
}
}
xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)(void *)&yprkv);
__yp_unbind(ysd);
if (r != 0) {
if (*outkey) {
free(*outkey);
*outkey = NULL;
}
if (*outval) {
free(*outval);
*outval = NULL;
}
}
return r;
}
int
yp_next(const char *indomain, const char *inmap, const char *inkey,
int inkeylen, char **outkey, int *outkeylen, char **outval, int *outvallen)
{
struct ypresp_key_val yprkv;
struct ypreq_key yprk;
struct dom_binding *ysd;
int r, nerrs = 0;
if (outkey == NULL || outkeylen == NULL || \
outval == NULL || outvallen == NULL || \
inkey == NULL)
return YPERR_BADARGS;
*outkey = *outval = NULL;
*outkeylen = *outvallen = 0;
if (_yp_invalid_domain(indomain))
return YPERR_BADARGS;
if (inmap == NULL || *inmap == '\0'
|| strlen(inmap) > YPMAXMAP)
return YPERR_BADARGS;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
yprk.domain = indomain;
yprk.map = inmap;
yprk.keydat.dptr = inkey;
yprk.keydat.dsize = inkeylen;
(void)memset(&yprkv, 0, sizeof yprkv);
r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_NEXT,
(xdrproc_t)xdr_ypreq_key,
&yprk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, _yplib_timeout);
if (r != RPC_SUCCESS) {
if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) {
clnt_perror(ysd->dom_client, "yp_next: clnt_call");
nerrs = 0;
} else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries)
return YPERR_YPSERV;
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprkv.status))) {
*outkeylen = yprkv.keydat.dsize;
if ((*outkey = malloc((size_t)(*outkeylen + 1))) == NULL)
r = YPERR_RESRC;
else {
(void)memcpy(*outkey, yprkv.keydat.dptr,
(size_t)*outkeylen);
(*outkey)[*outkeylen] = '\0';
}
*outvallen = yprkv.valdat.dsize;
if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL)
r = YPERR_RESRC;
else {
(void)memcpy(*outval, yprkv.valdat.dptr,
(size_t)*outvallen);
(*outval)[*outvallen] = '\0';
}
}
xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)(void *)&yprkv);
__yp_unbind(ysd);
if (r != 0) {
if (*outkey) {
free(*outkey);
*outkey = NULL;
}
if (*outval) {
free(*outval);
*outval = NULL;
}
}
return r;
}