142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/* $NetBSD: whois.c,v 1.8 1998/11/24 01:33:47 kim Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: whois.c,v 1.8 1998/11/24 01:33:47 kim Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define NICHOST "whois.internic.net"
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int main __P((int, char **));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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extern char *optarg;
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extern int optind;
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FILE *sfi, *sfo;
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int ch;
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struct sockaddr_in sin;
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struct hostent *hp;
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struct servent *sp;
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int s;
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char *host;
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int port = 0;
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char *p;
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host = NICHOST;
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while ((ch = getopt(argc, argv, "h:")) != -1)
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switch((char)ch) {
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case 'h':
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host = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (!argc)
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usage();
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if ((p = strrchr(host, ':')) != NULL) {
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*p++ = '\0';
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port = atoi(p);
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}
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hp = gethostbyname(host);
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if (hp == NULL)
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errx(1, "%s: %s", host, hstrerror(h_errno));
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host = hp->h_name;
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s = socket(hp->h_addrtype, SOCK_STREAM, 0);
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if (s < 0)
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err(1, "socket");
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memset((caddr_t)&sin, 0, sizeof (sin));
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sin.sin_family = hp->h_addrtype;
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if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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err(1, "bind");
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memmove((char *)&sin.sin_addr, hp->h_addr, hp->h_length);
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if (port == 0) {
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sp = getservbyname("whois", "tcp");
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if (sp == NULL)
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errx(1, "whois/tcp: unknown service");
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sin.sin_port = sp->s_port;
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} else
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sin.sin_port = htons(port);
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if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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err(1, "connect");
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sfi = fdopen(s, "r");
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sfo = fdopen(s, "w");
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if (sfi == NULL || sfo == NULL)
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err(1, "fdopen");
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while (argc-- > 1)
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(void)fprintf(sfo, "%s ", *argv++);
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(void)fprintf(sfo, "%s\r\n", *argv);
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(void)fflush(sfo);
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while ((ch = getc(sfi)) != EOF)
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putchar(ch);
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exit(0);
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}
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static void
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usage()
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{
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(void)fprintf(stderr, "usage: whois [-h hostname] name ...\n");
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exit(1);
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}
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