Commit | Line | Data |
---|---|---|
463dee20 | 1 | /* getnetent.c 4.7 83/01/02 */ |
b754e80b SL |
2 | |
3 | #include <stdio.h> | |
4 | #include <sys/socket.h> | |
5 | #include <netdb.h> | |
6 | #include <ctype.h> | |
7 | ||
8 | #define MAXALIASES 35 | |
9 | ||
62fc8b9c | 10 | static char NETDB[] = "/etc/networks"; |
b754e80b SL |
11 | static FILE *netf = NULL; |
12 | static char line[BUFSIZ+1]; | |
13 | static struct netent net; | |
14 | static char *net_aliases[MAXALIASES]; | |
15 | static int stayopen = 0; | |
b754e80b SL |
16 | static char *any(); |
17 | ||
18 | setnetent(f) | |
19 | int f; | |
20 | { | |
21 | if (netf == NULL) | |
22 | netf = fopen(NETDB, "r" ); | |
23 | else | |
24 | rewind(netf); | |
25 | stayopen |= f; | |
26 | } | |
27 | ||
28 | endnetent() | |
29 | { | |
30 | if (netf && !stayopen) { | |
31 | fclose(netf); | |
32 | netf = NULL; | |
33 | } | |
34 | } | |
35 | ||
36 | struct netent * | |
37 | getnetent() | |
38 | { | |
39 | char *p; | |
40 | register char *cp, **q; | |
41 | ||
42 | if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) | |
43 | return (NULL); | |
44 | again: | |
45 | p = fgets(line, BUFSIZ, netf); | |
46 | if (p == NULL) | |
47 | return (NULL); | |
48 | if (*p == '#') | |
49 | goto again; | |
50 | cp = any(p, "#\n"); | |
51 | if (cp == NULL) | |
52 | goto again; | |
53 | *cp = '\0'; | |
54 | net.n_name = p; | |
55 | cp = any(p, " \t"); | |
56 | if (cp == NULL) | |
57 | goto again; | |
58 | *cp++ = '\0'; | |
59 | while (*cp == ' ' || *cp == '\t') | |
60 | cp++; | |
61 | p = any(cp, " \t"); | |
62 | if (p != NULL) | |
63 | *p++ = '\0'; | |
047cb5c4 | 64 | net.n_net = inet_network(cp); |
86755108 | 65 | net.n_addrtype = AF_INET; |
9243aabf | 66 | q = net.n_aliases = net_aliases; |
463dee20 | 67 | if (p != NULL) |
9243aabf | 68 | cp = p; |
463dee20 SL |
69 | while (cp && *cp) { |
70 | if (*cp == ' ' || *cp == '\t') { | |
71 | cp++; | |
72 | continue; | |
b754e80b | 73 | } |
463dee20 SL |
74 | if (q < &net_aliases[MAXALIASES - 1]) |
75 | *q++ = cp; | |
76 | cp = any(cp, " \t"); | |
77 | if (cp != NULL) | |
78 | *cp++ = '\0'; | |
b754e80b SL |
79 | } |
80 | *q = NULL; | |
81 | return (&net); | |
82 | } | |
83 | ||
b754e80b SL |
84 | static char * |
85 | any(cp, match) | |
86 | register char *cp; | |
87 | char *match; | |
88 | { | |
89 | register char *mp, c; | |
90 | ||
91 | while (c = *cp) { | |
92 | for (mp = match; *mp; mp++) | |
93 | if (*mp == c) | |
94 | return (cp); | |
95 | cp++; | |
96 | } | |
97 | return ((char *)0); | |
98 | } |