freebsd-dev/usr.bin/whois/whois.c
1998-06-12 12:55:46 +00:00

157 lines
4.2 KiB
C

/*
* 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 const 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 const char rcsid[] =
"$Id: whois.c,v 1.5 1998/02/19 19:07:50 wollman Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#define NICHOST "whois.internic.net"
#define DNICHOST "nic.ddn.mil"
#define ANICHOST "whois.arin.net"
#define RNICHOST "whois.ripe.net"
#define PNICHOST "whois.apnic.net"
#define WHOIS_PORT 43
static void usage __P((void));
int
main(argc, argv)
int argc;
char **argv;
{
register FILE *sfi, *sfo;
register int ch;
struct sockaddr_in sin;
struct hostent *hp;
struct servent *sp;
int s;
char *host;
#ifdef SOCKS
SOCKSinit(argv[0]);
#endif
host = NICHOST;
while ((ch = getopt(argc, argv, "adh:pr")) != -1)
switch((char)ch) {
case 'a':
host = ANICHOST;
break;
case 'd':
host = DNICHOST;
break;
case 'h':
host = optarg;
break;
case 'p':
host = PNICHOST;
break;
case 'r':
host = RNICHOST;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (!argc)
usage();
s = socket(PF_INET, SOCK_STREAM, 0);
if (s < 0)
err(EX_OSERR, "socket");
memset(&sin, 0, sizeof sin);
sin.sin_len = sizeof sin;
sin.sin_family = AF_INET;
if (inet_aton(host, &sin.sin_addr) == 0) {
hp = gethostbyname2(host, AF_INET);
if (hp == NULL)
errx(EX_NOHOST, "%s: %s", host, hstrerror(h_errno));
host = hp->h_name;
sin.sin_addr = *(struct in_addr *)hp->h_addr_list[0];
}
sp = getservbyname("whois", "tcp");
if (sp == NULL)
sin.sin_port = htons(WHOIS_PORT);
else
sin.sin_port = sp->s_port;
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
err(EX_OSERR, "connect");
sfi = fdopen(s, "r");
sfo = fdopen(s, "w");
if (sfi == NULL || sfo == NULL)
err(EX_OSERR, "fdopen");
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 [-adpr] [-h hostname] name ...\n");
exit(EX_USAGE);
}