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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
     27 /*	  All Rights Reserved  	*/
     28 
     29 /*
     30  * University Copyright- Copyright (c) 1982, 1986, 1988
     31  * The Regents of the University of California
     32  * All Rights Reserved
     33  *
     34  * University Acknowledgment- Portions of this document are derived from
     35  * software developed by the University of California, Berkeley, and its
     36  * contributors.
     37  */
     38 
     39 #include <sys/types.h>
     40 #include <sys/socket.h>
     41 
     42 #include <netinet/in.h>
     43 
     44 #include <stdio.h>
     45 #include <netdb.h>
     46 #include <string.h>
     47 #include <stdlib.h>
     48 #include <unistd.h>
     49 
     50 #define	NICHOST	"whois.internic.net"
     51 
     52 int
     53 main(int argc, char *argv[])
     54 {
     55 	int s, rv;
     56 	register FILE *sfi, *sfo;
     57 	register int c;
     58 	char *host = NICHOST;
     59 	struct addrinfo *ai_head, *ai;
     60 	struct addrinfo hints;
     61 
     62 	argc--, argv++;
     63 	if (argc > 2 && strcmp(*argv, "-h") == 0) {
     64 		argv++, argc--;
     65 		host = *argv++;
     66 		argc--;
     67 	}
     68 	if (argc != 1) {
     69 		fprintf(stderr, "usage: whois [ -h host ] name\n");
     70 		exit(1);
     71 	}
     72 
     73 	memset(&hints, 0, sizeof (hints));
     74 	hints.ai_socktype = SOCK_STREAM;
     75 	hints.ai_protocol = IPPROTO_TCP;
     76 	hints.ai_flags = AI_ADDRCONFIG;
     77 	rv = getaddrinfo(host, "whois", &hints, &ai_head);
     78 	if (rv != 0) {
     79 		fprintf(stderr, "whois: %s: %s\n", host, gai_strerror(rv));
     80 		freeaddrinfo(ai_head);
     81 		exit(1);
     82 	}
     83 
     84 	for (ai = ai_head; ai != NULL; ai = ai->ai_next) {
     85 		s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
     86 		if (s >= 0) {
     87 			rv = connect(s, ai->ai_addr, ai->ai_addrlen);
     88 			if (rv < 0)
     89 				close(s);
     90 			else
     91 				break;
     92 		}
     93 	}
     94 	freeaddrinfo(ai_head);
     95 
     96 	if (s < 0) {
     97 		perror("whois: socket");
     98 		exit(2);
     99 	} else if (rv < 0) {
    100 		perror("whois: connect");
    101 		exit(5);
    102 	}
    103 
    104 	sfi = fdopen(s, "r");
    105 	sfo = fdopen(s, "w");
    106 	if (sfi == NULL || sfo == NULL) {
    107 		perror("fdopen");
    108 		close(s);
    109 		exit(1);
    110 	}
    111 	fprintf(sfo, "%s\r\n", *argv);
    112 	fflush(sfo);
    113 	while ((c = getc(sfi)) != EOF)
    114 		putchar(c);
    115 	return (0);
    116 }
    117