projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 5e649950 | 1 | /* getnetent.c 4.2 82/10/05 */ |
| 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 | ||
| 10 | static char *NETDB = "/usr/lib/networks"; | |
| 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'; | |
| 5e649950 | 64 | net.n_net = inet_addr(cp); |
| b754e80b SL |
65 | net.n_aliases = net_aliases; |
| 66 | q = net_aliases, cp = p; | |
| 67 | while (*cp) { | |
| 68 | if (*cp == ' ' || *cp == '\t') { | |
| 69 | cp++; | |
| 70 | continue; | |
| 71 | } | |
| 72 | if (q < &net_aliases[MAXALIASES - 1]) | |
| 73 | *q++ = cp; | |
| 74 | cp = any(cp, " \t"); | |
| 75 | if (*cp != NULL) | |
| 76 | *cp++ = '\0'; | |
| 77 | } | |
| 78 | *q = NULL; | |
| 79 | return (&net); | |
| 80 | } | |
| 81 | ||
| b754e80b SL |
82 | static char * |
| 83 | any(cp, match) | |
| 84 | register char *cp; | |
| 85 | char *match; | |
| 86 | { | |
| 87 | register char *mp, c; | |
| 88 | ||
| 89 | while (c = *cp) { | |
| 90 | for (mp = match; *mp; mp++) | |
| 91 | if (*mp == c) | |
| 92 | return (cp); | |
| 93 | cp++; | |
| 94 | } | |
| 95 | return ((char *)0); | |
| 96 | } |