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8ea4199d DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
6b2f9dd0 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
f4f66d2c KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
8ea4199d DF |
16 | */ |
17 | ||
2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
f4f66d2c | 19 | static char sccsid[] = "@(#)getnetent.c 5.5 (Berkeley) %G%"; |
6b2f9dd0 | 20 | #endif /* LIBC_SCCS and not lint */ |
b754e80b SL |
21 | |
22 | #include <stdio.h> | |
1a58f155 | 23 | #include <sys/types.h> |
b754e80b SL |
24 | #include <sys/socket.h> |
25 | #include <netdb.h> | |
26 | #include <ctype.h> | |
27 | ||
28 | #define MAXALIASES 35 | |
29 | ||
62fc8b9c | 30 | static char NETDB[] = "/etc/networks"; |
b754e80b SL |
31 | static FILE *netf = NULL; |
32 | static char line[BUFSIZ+1]; | |
33 | static struct netent net; | |
34 | static char *net_aliases[MAXALIASES]; | |
5442f2c7 | 35 | int _net_stayopen; |
b754e80b SL |
36 | static char *any(); |
37 | ||
38 | setnetent(f) | |
39 | int f; | |
40 | { | |
41 | if (netf == NULL) | |
42 | netf = fopen(NETDB, "r" ); | |
43 | else | |
44 | rewind(netf); | |
5442f2c7 | 45 | _net_stayopen |= f; |
b754e80b SL |
46 | } |
47 | ||
48 | endnetent() | |
49 | { | |
5442f2c7 | 50 | if (netf) { |
b754e80b SL |
51 | fclose(netf); |
52 | netf = NULL; | |
53 | } | |
5442f2c7 | 54 | _net_stayopen = 0; |
b754e80b SL |
55 | } |
56 | ||
57 | struct netent * | |
58 | getnetent() | |
59 | { | |
60 | char *p; | |
61 | register char *cp, **q; | |
62 | ||
63 | if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) | |
64 | return (NULL); | |
65 | again: | |
66 | p = fgets(line, BUFSIZ, netf); | |
67 | if (p == NULL) | |
68 | return (NULL); | |
69 | if (*p == '#') | |
70 | goto again; | |
71 | cp = any(p, "#\n"); | |
72 | if (cp == NULL) | |
73 | goto again; | |
74 | *cp = '\0'; | |
75 | net.n_name = p; | |
76 | cp = any(p, " \t"); | |
77 | if (cp == NULL) | |
78 | goto again; | |
79 | *cp++ = '\0'; | |
80 | while (*cp == ' ' || *cp == '\t') | |
81 | cp++; | |
82 | p = any(cp, " \t"); | |
83 | if (p != NULL) | |
84 | *p++ = '\0'; | |
047cb5c4 | 85 | net.n_net = inet_network(cp); |
86755108 | 86 | net.n_addrtype = AF_INET; |
9243aabf | 87 | q = net.n_aliases = net_aliases; |
463dee20 | 88 | if (p != NULL) |
9243aabf | 89 | cp = p; |
463dee20 SL |
90 | while (cp && *cp) { |
91 | if (*cp == ' ' || *cp == '\t') { | |
92 | cp++; | |
93 | continue; | |
b754e80b | 94 | } |
463dee20 SL |
95 | if (q < &net_aliases[MAXALIASES - 1]) |
96 | *q++ = cp; | |
97 | cp = any(cp, " \t"); | |
98 | if (cp != NULL) | |
99 | *cp++ = '\0'; | |
b754e80b SL |
100 | } |
101 | *q = NULL; | |
102 | return (&net); | |
103 | } | |
104 | ||
b754e80b SL |
105 | static char * |
106 | any(cp, match) | |
107 | register char *cp; | |
108 | char *match; | |
109 | { | |
110 | register char *mp, c; | |
111 | ||
112 | while (c = *cp) { | |
113 | for (mp = match; *mp; mp++) | |
114 | if (*mp == c) | |
115 | return (cp); | |
116 | cp++; | |
117 | } | |
118 | return ((char *)0); | |
119 | } |