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f42904bc DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
09908f00 | 13 | #ifndef lint |
5d891393 | 14 | static char sccsid[] = "@(#)whois.c 5.2 (Berkeley) %G%"; |
f42904bc | 15 | #endif not lint |
09908f00 SL |
16 | |
17 | #include <sys/types.h> | |
18 | #include <sys/socket.h> | |
19 | ||
20 | #include <netinet/in.h> | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <netdb.h> | |
24 | ||
5d891393 | 25 | #define NICHOST "sri-nic.arpa" |
09908f00 SL |
26 | |
27 | main(argc, argv) | |
28 | int argc; | |
29 | char *argv[]; | |
30 | { | |
31 | int s; | |
32 | register FILE *sfi, *sfo; | |
33 | register char c; | |
34 | char *host = NICHOST; | |
35 | struct sockaddr_in sin; | |
36 | struct hostent *hp; | |
37 | struct servent *sp; | |
38 | ||
39 | argc--, argv++; | |
5aa2f89a | 40 | if (argc > 2 && strcmp(*argv, "-h") == 0) { |
09908f00 SL |
41 | argv++, argc--; |
42 | host = *argv++; | |
43 | argc--; | |
44 | } | |
5aa2f89a RC |
45 | if (argc != 1) { |
46 | fprintf(stderr, "usage: whois [ -h host ] name\n"); | |
47 | exit(1); | |
48 | } | |
09908f00 SL |
49 | hp = gethostbyname(host); |
50 | if (hp == NULL) { | |
51 | fprintf(stderr, "whois: %s: host unknown\n", host); | |
52 | exit(1); | |
53 | } | |
54 | host = hp->h_name; | |
55 | s = socket(hp->h_addrtype, SOCK_STREAM, 0, 0); | |
56 | if (s < 0) { | |
57 | perror("whois: socket"); | |
58 | exit(2); | |
59 | } | |
60 | sin.sin_family = hp->h_addrtype; | |
61 | if (bind(s, &sin, sizeof (sin), 0) < 0) { | |
62 | perror("whois: bind"); | |
63 | exit(3); | |
64 | } | |
65 | bcopy(hp->h_addr, &sin.sin_addr, hp->h_length); | |
66 | sp = getservbyname("whois", "tcp"); | |
67 | if (sp == NULL) { | |
68 | fprintf(stderr, "whois: whois/tcp: unknown service\n"); | |
69 | exit(4); | |
70 | } | |
71 | sin.sin_port = sp->s_port; | |
72 | if (connect(s, &sin, sizeof (sin), 0) < 0) { | |
73 | perror("whois: connect"); | |
74 | exit(5); | |
75 | } | |
76 | sfi = fdopen(s, "r"); | |
77 | sfo = fdopen(s, "w"); | |
78 | if (sfi == NULL || sfo == NULL) { | |
79 | perror("fdopen"); | |
80 | close(s); | |
81 | exit(1); | |
82 | } | |
83 | fprintf(sfo, "%s\r\n", *argv); | |
84 | fflush(sfo); | |
85 | while ((c = getc(sfi)) != EOF) | |
86 | putchar(c); | |
87 | } |