source: trunk/minix/lib/ip/getnetent.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 3.3 KB
Line 
1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37
38#include <sys/types.h>
39#include <stdio.h>
40#include <string.h>
41#include <net/gen/in.h>
42#include <net/gen/netdb.h>
43#include <net/gen/inet.h>
44#include <net/gen/socket.h>
45
46#define MAXALIASES 35
47
48static FILE *netf;
49static char line[BUFSIZ+1];
50static struct netent net;
51static char *net_aliases[MAXALIASES];
52int _net_stayopen;
53
54void
55setnetent(f)
56 int f;
57{
58 if (netf == NULL)
59 netf = fopen(_PATH_NETWORKS, "r" );
60 else
61 rewind(netf);
62 _net_stayopen |= f;
63}
64
65void
66endnetent()
67{
68 if (netf) {
69 fclose(netf);
70 netf = NULL;
71 }
72 _net_stayopen = 0;
73}
74
75struct netent *
76getnetent()
77{
78 char *p;
79 register char *cp, **q;
80
81 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
82 return (NULL);
83again:
84 p = fgets(line, BUFSIZ, netf);
85 if (p == NULL)
86 return (NULL);
87 if (*p == '#')
88 goto again;
89 cp = strpbrk(p, "#\n");
90 if (cp == NULL)
91 goto again;
92 *cp = '\0';
93 net.n_name = p;
94 cp = strpbrk(p, " \t");
95 if (cp == NULL)
96 goto again;
97 *cp++ = '\0';
98 while (*cp == ' ' || *cp == '\t')
99 cp++;
100 p = strpbrk(cp, " \t");
101 if (p != NULL)
102 *p++ = '\0';
103 net.n_net = inet_network(cp);
104 net.n_addrtype = AF_INET;
105 q = net.n_aliases = net_aliases;
106 if (p != NULL)
107 cp = p;
108 while (cp && *cp) {
109 if (*cp == ' ' || *cp == '\t') {
110 cp++;
111 continue;
112 }
113 if (q < &net_aliases[MAXALIASES - 1])
114 *q++ = cp;
115 cp = strpbrk(cp, " \t");
116 if (cp != NULL)
117 *cp++ = '\0';
118 }
119 *q = NULL;
120 return (&net);
121}
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