source: trunk/third/whois/whois.c @ 9079

/*      $NetBSD: whois.c,v 1.5 1994/11/14 05:13:25 jtc Exp $    */

/*
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)whois.c     8.1 (Berkeley) 6/6/93";
#endif
static char rcsid[] = "$NetBSD: whois.c,v 1.5 1994/11/14 05:13:25 jtc Exp $";
#endif /* not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define NICHOST "whois.internic.net"

static void usage();

int
main(argc, argv)
        int argc;
        char **argv;
{
        extern char *optarg;
        extern int optind;
        register FILE *sfi, *sfo;
        register int ch;
        struct sockaddr_in sin;
        struct hostent *hp;
        struct servent *sp;
        int s;
        char *host;

        host = NICHOST;
        while ((ch = getopt(argc, argv, "h:")) != EOF)
                switch((char)ch) {
                case 'h':
                        host = optarg;
                        break;
                case '?':
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        if (!argc)
                usage();

        hp = gethostbyname(host);
        if (hp == NULL) {
                (void)fprintf(stderr, "whois: %s: ", host);
                herror((char *)NULL);
                exit(1);
        }
        host = hp->h_name;
        s = socket(hp->h_addrtype, SOCK_STREAM, 0);
        if (s < 0) {
                perror("whois: socket");
                exit(1);
        }
        bzero((caddr_t)&sin, sizeof (sin));
        sin.sin_family = hp->h_addrtype;
        if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
                perror("whois: bind");
                exit(1);
        }
        bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
        sp = getservbyname("whois", "tcp");
        if (sp == NULL) {
                (void)fprintf(stderr, "whois: whois/tcp: unknown service\n");
                exit(1);
        }
        sin.sin_port = sp->s_port;
        if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
                perror("whois: connect");
                exit(1);
        }
        sfi = fdopen(s, "r");
        sfo = fdopen(s, "w");
        if (sfi == NULL || sfo == NULL) {
                perror("whois: fdopen");
                (void)close(s);
                exit(1);
        }
        while (argc-- > 1)
                (void)fprintf(sfo, "%s ", *argv++);
        (void)fprintf(sfo, "%s\r\n", *argv);
        (void)fflush(sfo);
        while ((ch = getc(sfi)) != EOF)
                putchar(ch);
        exit(0);
}

static void
usage()
{
        (void)fprintf(stderr, "usage: whois [-h hostname] name ...\n");
        exit(1);
}