projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| 6 | * provided that this notice is preserved and that due credit is given | |
| 7 | * to the University of California at Berkeley. The name of the University | |
| 8 | * may not be used to endorse or promote products derived from this | |
| 9 | * software without specific prior written permission. This software | |
| 10 | * is provided ``as is'' without express or implied warranty. | |
| 8ea4199d DF |
11 | */ |
| 12 | ||
| 2ce81398 | 13 | #if defined(LIBC_SCCS) && !defined(lint) |
| 6b2f9dd0 KB |
14 | static char sccsid[] = "@(#)getnetent.c 5.4 (Berkeley) %G%"; |
| 15 | #endif /* LIBC_SCCS and not lint */ | |
| b754e80b SL |
16 | |
| 17 | #include <stdio.h> | |
| 1a58f155 | 18 | #include <sys/types.h> |
| b754e80b SL |
19 | #include <sys/socket.h> |
| 20 | #include <netdb.h> | |
| 21 | #include <ctype.h> | |
| 22 | ||
| 23 | #define MAXALIASES 35 | |
| 24 | ||
| 62fc8b9c | 25 | static char NETDB[] = "/etc/networks"; |
| b754e80b SL |
26 | static FILE *netf = NULL; |
| 27 | static char line[BUFSIZ+1]; | |
| 28 | static struct netent net; | |
| 29 | static char *net_aliases[MAXALIASES]; | |
| 5442f2c7 | 30 | int _net_stayopen; |
| b754e80b SL |
31 | static char *any(); |
| 32 | ||
| 33 | setnetent(f) | |
| 34 | int f; | |
| 35 | { | |
| 36 | if (netf == NULL) | |
| 37 | netf = fopen(NETDB, "r" ); | |
| 38 | else | |
| 39 | rewind(netf); | |
| 5442f2c7 | 40 | _net_stayopen |= f; |
| b754e80b SL |
41 | } |
| 42 | ||
| 43 | endnetent() | |
| 44 | { | |
| 5442f2c7 | 45 | if (netf) { |
| b754e80b SL |
46 | fclose(netf); |
| 47 | netf = NULL; | |
| 48 | } | |
| 5442f2c7 | 49 | _net_stayopen = 0; |
| b754e80b SL |
50 | } |
| 51 | ||
| 52 | struct netent * | |
| 53 | getnetent() | |
| 54 | { | |
| 55 | char *p; | |
| 56 | register char *cp, **q; | |
| 57 | ||
| 58 | if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) | |
| 59 | return (NULL); | |
| 60 | again: | |
| 61 | p = fgets(line, BUFSIZ, netf); | |
| 62 | if (p == NULL) | |
| 63 | return (NULL); | |
| 64 | if (*p == '#') | |
| 65 | goto again; | |
| 66 | cp = any(p, "#\n"); | |
| 67 | if (cp == NULL) | |
| 68 | goto again; | |
| 69 | *cp = '\0'; | |
| 70 | net.n_name = p; | |
| 71 | cp = any(p, " \t"); | |
| 72 | if (cp == NULL) | |
| 73 | goto again; | |
| 74 | *cp++ = '\0'; | |
| 75 | while (*cp == ' ' || *cp == '\t') | |
| 76 | cp++; | |
| 77 | p = any(cp, " \t"); | |
| 78 | if (p != NULL) | |
| 79 | *p++ = '\0'; | |
| 047cb5c4 | 80 | net.n_net = inet_network(cp); |
| 86755108 | 81 | net.n_addrtype = AF_INET; |
| 9243aabf | 82 | q = net.n_aliases = net_aliases; |
| 463dee20 | 83 | if (p != NULL) |
| 9243aabf | 84 | cp = p; |
| 463dee20 SL |
85 | while (cp && *cp) { |
| 86 | if (*cp == ' ' || *cp == '\t') { | |
| 87 | cp++; | |
| 88 | continue; | |
| b754e80b | 89 | } |
| 463dee20 SL |
90 | if (q < &net_aliases[MAXALIASES - 1]) |
| 91 | *q++ = cp; | |
| 92 | cp = any(cp, " \t"); | |
| 93 | if (cp != NULL) | |
| 94 | *cp++ = '\0'; | |
| b754e80b SL |
95 | } |
| 96 | *q = NULL; | |
| 97 | return (&net); | |
| 98 | } | |
| 99 | ||
| b754e80b SL |
100 | static char * |
| 101 | any(cp, match) | |
| 102 | register char *cp; | |
| 103 | char *match; | |
| 104 | { | |
| 105 | register char *mp, c; | |
| 106 | ||
| 107 | while (c = *cp) { | |
| 108 | for (mp = match; *mp; mp++) | |
| 109 | if (*mp == c) | |
| 110 | return (cp); | |
| 111 | cp++; | |
| 112 | } | |
| 113 | return ((char *)0); | |
| 114 | } |