getnetent.c revision 1.9 
1/*	$NetBSD: getnetent.c,v 1.9 1997/07/13 19:57:36 christos Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  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 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
36 *    Dep. Matematica Universidade de Coimbra, Portugal, Europe
37 *
38 * Permission to use, copy, modify, and distribute this software for any
39 * purpose with or without fee is hereby granted, provided that the above
40 * copyright notice and this permission notice appear in all copies.
41 *
42 * from getnetent.c   1.1 (Coimbra) 93/06/02
43 */
44
45#include <sys/cdefs.h>
46#if defined(LIBC_SCCS) && !defined(lint)
47#if 0
48static char sccsid[] = "@(#)getnetent.c	8.1 (Berkeley) 6/4/93";
49static char rcsid[] = "Id: getnetent.c,v 8.3 1996/08/05 08:31:35 vixie Exp";
50#else
51__RCSID("$NetBSD: getnetent.c,v 1.9 1997/07/13 19:57:36 christos Exp $");
52#endif
53#endif /* LIBC_SCCS and not lint */
54
55#include <sys/types.h>
56#include <sys/socket.h>
57#include <netinet/in.h>
58#include <arpa/inet.h>
59#include <netdb.h>
60#include <stdio.h>
61#include <string.h>
62
63#define	MAXALIASES	35
64
65static FILE *netf;
66static char line[BUFSIZ+1];
67static struct netent net;
68static char *net_aliases[MAXALIASES];
69int _net_stayopen;
70
71void _setnetent __P((int));
72void _endnetent __P((void));
73
74void
75setnetent(stayopen)
76	int stayopen;
77{
78
79	sethostent(stayopen);
80	_setnetent(stayopen);
81}
82
83void
84endnetent()
85{
86
87	endhostent();
88	_endnetent();
89}
90
91void
92_setnetent(f)
93	int f;
94{
95
96	if (netf == NULL)
97		netf = fopen(_PATH_NETWORKS, "r" );
98	else
99		rewind(netf);
100	_net_stayopen |= f;
101}
102
103void
104_endnetent()
105{
106
107	if (netf) {
108		fclose(netf);
109		netf = NULL;
110	}
111	_net_stayopen = 0;
112}
113
114struct netent *
115getnetent()
116{
117	char *p;
118	register char *cp, **q;
119
120	if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
121		return (NULL);
122again:
123	p = fgets(line, BUFSIZ, netf);
124	if (p == NULL)
125		return (NULL);
126	if (*p == '#')
127		goto again;
128	cp = strpbrk(p, "#\n");
129	if (cp == NULL)
130		goto again;
131	*cp = '\0';
132	net.n_name = p;
133	cp = strpbrk(p, " \t");
134	if (cp == NULL)
135		goto again;
136	*cp++ = '\0';
137	while (*cp == ' ' || *cp == '\t')
138		cp++;
139	p = strpbrk(cp, " \t");
140	if (p != NULL)
141		*p++ = '\0';
142	net.n_net = inet_network(cp);
143	net.n_addrtype = AF_INET;
144	q = net.n_aliases = net_aliases;
145	if (p != NULL)  {
146		cp = p;
147		while (cp && *cp) {
148			if (*cp == ' ' || *cp == '\t') {
149				cp++;
150				continue;
151			}
152			if (q < &net_aliases[MAXALIASES - 1])
153				*q++ = cp;
154			cp = strpbrk(cp, " \t");
155			if (cp != NULL)
156				*cp++ = '\0';
157		}
158	}
159	*q = NULL;
160	return (&net);
161}
162