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8ea4199d DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
6b2f9dd0 KB |
3 | * All rights reserved. |
4 | * | |
269a7923 | 5 | * %sccs.include.redist.c% |
8ea4199d DF |
6 | */ |
7 | ||
2ce81398 | 8 | #if defined(LIBC_SCCS) && !defined(lint) |
24fac7d8 | 9 | static char sccsid[] = "@(#)getprotoent.c 5.8 (Berkeley) %G%"; |
6b2f9dd0 | 10 | #endif /* LIBC_SCCS and not lint */ |
eef09c7b | 11 | |
1a58f155 | 12 | #include <sys/types.h> |
eef09c7b SL |
13 | #include <sys/socket.h> |
14 | #include <netdb.h> | |
24fac7d8 KB |
15 | #include <stdio.h> |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
eef09c7b SL |
18 | |
19 | #define MAXALIASES 35 | |
20 | ||
eef09c7b SL |
21 | static FILE *protof = NULL; |
22 | static char line[BUFSIZ+1]; | |
23 | static struct protoent proto; | |
24 | static char *proto_aliases[MAXALIASES]; | |
5442f2c7 | 25 | int _proto_stayopen; |
eef09c7b | 26 | |
24fac7d8 | 27 | void |
eef09c7b SL |
28 | setprotoent(f) |
29 | int f; | |
30 | { | |
31 | if (protof == NULL) | |
29eb0a7d | 32 | protof = fopen(_PATH_PROTOCOLS, "r" ); |
eef09c7b SL |
33 | else |
34 | rewind(protof); | |
5442f2c7 | 35 | _proto_stayopen |= f; |
eef09c7b SL |
36 | } |
37 | ||
24fac7d8 | 38 | void |
eef09c7b SL |
39 | endprotoent() |
40 | { | |
5442f2c7 | 41 | if (protof) { |
eef09c7b SL |
42 | fclose(protof); |
43 | protof = NULL; | |
44 | } | |
5442f2c7 | 45 | _proto_stayopen = 0; |
eef09c7b SL |
46 | } |
47 | ||
48 | struct protoent * | |
49 | getprotoent() | |
50 | { | |
51 | char *p; | |
52 | register char *cp, **q; | |
53 | ||
29eb0a7d | 54 | if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) |
eef09c7b SL |
55 | return (NULL); |
56 | again: | |
57 | if ((p = fgets(line, BUFSIZ, protof)) == NULL) | |
58 | return (NULL); | |
59 | if (*p == '#') | |
60 | goto again; | |
24fac7d8 | 61 | cp = strpbrk(p, "#\n"); |
eef09c7b SL |
62 | if (cp == NULL) |
63 | goto again; | |
64 | *cp = '\0'; | |
65 | proto.p_name = p; | |
24fac7d8 | 66 | cp = strpbrk(p, " \t"); |
eef09c7b SL |
67 | if (cp == NULL) |
68 | goto again; | |
69 | *cp++ = '\0'; | |
70 | while (*cp == ' ' || *cp == '\t') | |
71 | cp++; | |
24fac7d8 | 72 | p = strpbrk(cp, " \t"); |
eef09c7b SL |
73 | if (p != NULL) |
74 | *p++ = '\0'; | |
75 | proto.p_proto = atoi(cp); | |
9243aabf SL |
76 | q = proto.p_aliases = proto_aliases; |
77 | if (p != NULL) { | |
78 | cp = p; | |
463dee20 | 79 | while (cp && *cp) { |
9243aabf SL |
80 | if (*cp == ' ' || *cp == '\t') { |
81 | cp++; | |
82 | continue; | |
83 | } | |
84 | if (q < &proto_aliases[MAXALIASES - 1]) | |
85 | *q++ = cp; | |
24fac7d8 | 86 | cp = strpbrk(cp, " \t"); |
463dee20 | 87 | if (cp != NULL) |
9243aabf | 88 | *cp++ = '\0'; |
eef09c7b | 89 | } |
eef09c7b SL |
90 | } |
91 | *q = NULL; | |
92 | return (&proto); | |
93 | } |