cmd-inet/usr.bin/whois.c

	whois.c revision f098c48b1ff9ac959b8b54071230d693c7814047
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>

#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#define NICHOST "whois.internic.net"

int
main(int argc, char *argv[])
{
    int s, rv;
    register FILE *sfi, *sfo;
    register int c;
    char *host = NICHOST;
    struct addrinfo *ai_head, *ai;
    struct addrinfo hints;

    argc--, argv++;
    if (argc > 2 && strcmp(*argv, "-h") == 0) {
        argv++, argc--;
        host = *argv++;
        argc--;
    }
    if (argc != 1) {
        fprintf(stderr, "usage: whois [ -h host ] name\n");
        exit(1);
    }

    memset(&hints, 0, sizeof (hints));
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    hints.ai_flags = AI_ADDRCONFIG;
    rv = getaddrinfo(host, "whois", &hints, &ai_head);
    if (rv != 0) {
        fprintf(stderr, "whois: %s: %s\n", host, gai_strerror(rv));
        freeaddrinfo(ai_head);
        exit(1);
    }

    for (ai = ai_head; ai != NULL; ai = ai->ai_next) {
        s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
        if (s >= 0) {
            rv = connect(s, ai->ai_addr, ai->ai_addrlen);
            if (rv < 0)
                close(s);
            else
                break;
        }
    }
    freeaddrinfo(ai_head);

    if (s < 0) {
        perror("whois: socket");
        exit(2);
    } else if (rv < 0) {
        perror("whois: connect");
        exit(5);
    }

    sfi = fdopen(s, "r");
    sfo = fdopen(s, "w");
    if (sfi == NULL || sfo == NULL) {
        perror("fdopen");
        close(s);
        exit(1);
    }
    fprintf(sfo, "%s\r\n", *argv);
    fflush(sfo);
    while ((c = getc(sfi)) != EOF)
        putchar(c);
    return (0);
}