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/* $OpenBSD: getservbyport.c,v 1.8 2015/09/14 07:38:38 guenther Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 <netdb.h>
#include <stdio.h>
#include <string.h>
int
getservbyport_r(int port, const char *proto, struct servent *se,
struct servent_data *sd)
{
int error;
setservent_r(sd->stayopen, sd);
while ((error = getservent_r(se, sd)) == 0) {
if (se->s_port != port)
continue;
if (proto == 0 || strcmp(se->s_proto, proto) == 0)
break;
}
if (!sd->stayopen && sd->fp != NULL) {
fclose(sd->fp);
sd->fp = NULL;
}
return (error);
}
DEF_WEAK(getservbyport_r);
struct servent *
getservbyport(int port, const char *proto)
{
extern struct servent_data _servent_data;
static struct servent serv;
if (getservbyport_r(port, proto, &serv, &_servent_data) != 0)
return (NULL);
return (&serv);
}
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