| 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 | |
| 13 | #ifndef lint |
| 14 | static char sccsid[] = "@(#)whois.c 5.2 (Berkeley) %G%"; |
| 15 | #endif not lint |
| 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 | |
| 25 | #define NICHOST "sri-nic.arpa" |
| 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++; |
| 40 | if (argc > 2 && strcmp(*argv, "-h") == 0) { |
| 41 | argv++, argc--; |
| 42 | host = *argv++; |
| 43 | argc--; |
| 44 | } |
| 45 | if (argc != 1) { |
| 46 | fprintf(stderr, "usage: whois [ -h host ] name\n"); |
| 47 | exit(1); |
| 48 | } |
| 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 | } |