1 /*
2 * Copyright (c) 1983 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
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.
16 */
17
18 #if defined(LIBC_SCCS) && !defined(lint)
19 static char sccsid[] = "@(#)getnetent.c 5.5 (Berkeley) 6/27/88";
20 #endif /* LIBC_SCCS and not lint */
21
22 #include "inetprivate.h"
23
24 #define MAXALIASES 35
25
26 static char NETDB[] = _PATH_NETWORKS;
27 static FILE *netf = NULL;
28 static char line[BUFSIZ+1];
29 static struct netent net;
30 static char *net_aliases[MAXALIASES];
31 static char *any(char *, char *);
32
33 int _net_stayopen;
34 extern u_int32_t inet_network(const char *cp);
35
36 void
setnetent(f)37 setnetent(f)
38 int f;
39 {
40 if (netf == NULL)
41 netf = fopen(NETDB, "r" );
42 else
43 rewind(netf);
44 _net_stayopen |= f;
45 }
46
47 void
endnetent()48 endnetent()
49 {
50 if (netf) {
51 fclose(netf);
52 netf = NULL;
53 }
54 _net_stayopen = 0;
55 }
56
57 struct netent *
getnetent()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';
85 net.n_net = inet_network(cp);
86 net.n_addrtype = AF_INET;
87 q = net.n_aliases = net_aliases;
88 if (p != NULL)
89 cp = p;
90 while (cp && *cp) {
91 if (*cp == ' ' || *cp == '\t') {
92 cp++;
93 continue;
94 }
95 if (q < &net_aliases[MAXALIASES - 1])
96 *q++ = cp;
97 cp = any(cp, " \t");
98 if (cp != NULL)
99 *cp++ = '\0';
100 }
101 *q = NULL;
102 return (&net);
103 }
104
105 static char *
any(cp,match)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 }
120