minix/lib/libc/net/getnetent.c

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/* $NetBSD: getnetent.c,v 1.21 2012/03/20 17:44:18 matt 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.
*
* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
* Dep. Matematica Universidade de Coimbra, Portugal, Europe
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* from getnetent.c 1.1 (Coimbra) 93/06/02
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp ";
#else
__RCSID("$NetBSD: getnetent.c,v 1.21 2012/03/20 17:44:18 matt Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#ifdef __weak_alias
__weak_alias(endnetent,_endnetent)
__weak_alias(getnetent,_getnetent)
__weak_alias(setnetent,_setnetent)
#endif
#define MAXALIASES 35
static FILE *netf;
static char line[BUFSIZ+1];
static struct netent net;
static char *net_aliases[MAXALIASES];
int _net_stayopen;
static void __setnetent(int);
static void __endnetent(void);
void
setnetent(int stayopen)
{
sethostent(stayopen);
__setnetent(stayopen);
}
void
endnetent(void)
{
endhostent();
__endnetent();
}
static void
__setnetent(int f)
{
if (netf == NULL)
netf = fopen(_PATH_NETWORKS, "re");
else
rewind(netf);
_net_stayopen |= f;
}
static void
__endnetent(void)
{
if (netf) {
fclose(netf);
netf = NULL;
}
_net_stayopen = 0;
}
struct netent *
getnetent(void)
{
char *p;
register char *cp, **q;
if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "re")) == NULL)
return (NULL);
#if (defined(__sparc__) && defined(_LP64)) || \
defined(__alpha__) || \
(defined(__i386__) && defined(_LP64)) || \
(defined(__sh__) && defined(_LP64))
net.__n_pad0 = 0;
#endif
again:
p = fgets(line, (int)sizeof line, netf);
if (p == NULL)
return (NULL);
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
net.n_name = p;
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
while (*cp == ' ' || *cp == '\t')
cp++;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
net.n_net = inet_network(cp);
net.n_addrtype = AF_INET;
q = net.n_aliases = net_aliases;
if (p != NULL) {
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &net_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
}
*q = NULL;
return (&net);
}