gettable.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 1989 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 */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <netdb.h>
#define OUTFILE "hosts.txt" /* default output file */
#define VERFILE "hosts.ver" /* default version file */
#define QUERY "ALL\r\n" /* query to hostname server */
#define VERSION "VERSION\r\n" /* get version number */
#define equaln(s1, s2, n) (!strncmp(s1, s2, n))
#ifdef SYSV
#define bcopy(a,b,c) memcpy(b,a,c)
#endif
struct sockaddr_in sin;
struct sockaddr_in sintmp;
char buf[BUFSIZ];
char *outfile = OUTFILE;
main(argc, argv)
int argc;
char *argv[];
{
int s;
register len;
register FILE *sfi, *sfo, *hf;
char *host;
register struct hostent *hp;
struct servent *sp;
int version = 0;
int beginseen = 0;
int endseen = 0;
argv++, argc--;
if (argc > 0 && **argv == '-') {
if (argv[0][1] != 'v')
fprintf(stderr, "unknown option %s ignored\n", *argv);
else
version++, outfile = VERFILE;
argv++, argc--;
}
if (argc < 1 || argc > 2) {
fprintf(stderr, "usage: gettable [-v] host [ file ]\n");
exit(1);
}
sp = getservbyname("hostnames", "tcp");
if (sp == NULL) {
fprintf(stderr, "gettable: hostnames/tcp: unknown service\n");
exit(3);
}
host = *argv;
argv++, argc--;
sintmp.sin_addr.s_addr = inet_addr(host);
if (sintmp.sin_addr.s_addr != -1 && sintmp.sin_addr.s_addr != 0) {
sin.sin_family = AF_INET;
} else {
hp = gethostbyname(host);
if (hp == NULL) {
fprintf(stderr, "gettable: %s: host unknown\n", host);
exit(2);
} else {
sin.sin_family = hp->h_addrtype;
host = hp->h_name;
}
}
if (argc > 0)
outfile = *argv;
s = socket(sin.sin_family, SOCK_STREAM, 0);
if (s < 0) {
perror("gettable: socket");
exit(4);
}
if (bind(s, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
perror("gettable: bind");
exit(5);
}
if (sintmp.sin_addr.s_addr != -1 && sintmp.sin_addr.s_addr != 0)
bcopy((char *)&sintmp.sin_addr, (char *)&sin.sin_addr,
sizeof(sintmp.sin_addr));
else
bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
sin.sin_port = sp->s_port;
if (connect(s, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
perror("gettable: connect");
exit(6);
}
fprintf(stderr, "Connection to %s opened.\n", host);
sfi = fdopen(s, "r");
sfo = fdopen(s, "w");
if (sfi == NULL || sfo == NULL) {
perror("gettable: fdopen");
close(s);
exit(1);
}
hf = fopen(outfile, "w");
if (hf == NULL) {
fprintf(stderr, "gettable: "); perror(outfile);
close(s);
exit(1);
}
fprintf(sfo, version ? VERSION : QUERY);
fflush(sfo);
while (fgets(buf, sizeof(buf), sfi) != NULL) {
len = strlen(buf);
buf[len-2] = '\0';
if (!version && equaln(buf, "BEGIN", 5)) {
if (beginseen || endseen) {
fprintf(stderr,
"gettable: BEGIN sequence error\n");
exit(90);
}
beginseen++;
continue;
}
if (!version && equaln(buf, "END", 3)) {
if (!beginseen || endseen) {
fprintf(stderr,
"gettable: END sequence error\n");
exit(91);
}
endseen++;
continue;
}
if (equaln(buf, "ERR", 3)) {
fprintf(stderr,
"gettable: hostname service error: %s", buf);
exit(92);
}
fprintf(hf, "%s\n", buf);
}
fclose(hf);
if (!version) {
if (!beginseen) {
fprintf(stderr, "gettable: no BEGIN seen\n");
exit(93);
}
if (!endseen) {
fprintf(stderr, "gettable: no END seen\n");
exit(94);
}
fprintf(stderr, "Host table received.\n");
} else
fprintf(stderr, "Version number received.\n");
close(s);
fprintf(stderr, "Connection to %s closed\n", host);
exit(0);
/* NOTREACHED */
}