1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#define __FORCE_GLIBC
#include <features.h>
#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
# define LOCK __pthread_mutex_lock(&mylock)
# define UNLOCK __pthread_mutex_unlock(&mylock);
#else
# define LOCK
# define UNLOCK
#endif
#define MAXALIASES 35
static const char NETDB[] = _PATH_NETWORKS;
static FILE *netf = NULL;
static char *line = NULL;
static struct netent net;
static char *net_aliases[MAXALIASES];
int _net_stayopen;
void setnetent(int f)
{
LOCK;
if (netf == NULL)
netf = fopen(NETDB, "r" );
else
rewind(netf);
_net_stayopen |= f;
UNLOCK;
return;
}
void endnetent(void)
{
LOCK;
if (netf) {
fclose(netf);
netf = NULL;
}
_net_stayopen = 0;
UNLOCK;
}
static char * any(register char *cp, char *match)
{
register char *mp, c;
while ((c = *cp)) {
for (mp = match; *mp; mp++)
if (*mp == c)
return (cp);
cp++;
}
return ((char *)0);
}
struct netent * getnetent(void)
{
char *p;
register char *cp, **q;
LOCK;
if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) {
UNLOCK;
return (NULL);
}
again:
if (!line) {
line = malloc(BUFSIZ + 1);
if (!line)
abort();
}
p = fgets(line, BUFSIZ, netf);
if (p == NULL) {
UNLOCK;
return (NULL);
}
if (*p == '#')
goto again;
cp = any(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
net.n_name = p;
cp = any(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
while (*cp == ' ' || *cp == '\t')
cp++;
p = any(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 = any(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
UNLOCK;
return (&net);
}
|
