* Copyright (c) 1986 Regents of the University of California
* All Rights Reserved
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
/*
* Actually, this program is from Rutgers University, however it is
* based on nslookup and other pieces of named tools, so it needs
* that copyright notice.
*
* To compile on a Sun, use the resolv library:
* cc -O -o host host.c -lresolv
*/
#include <stdio.h>
#include <sys/types.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <resolv.h>
#include <sys/param.h>
#include <strings.h>
#include <ctype.h>
extern int h_errno;
#define NUMMX 50
#define SUCCESS 0
#define TIME_OUT -1
#define NO_INFO -2
#define ERROR -3
#define NONAUTH -4
#define NAME_LEN 256
#ifndef T_TXT
#define T_TXT 16
#endif
#ifndef NO_DATA
#define NO_DATA NO_ADDRESS
#endif
#ifndef C_HS
#define C_HS 4
#endif
int sockFD;
FILE *filePtr;
char *DecodeError();
struct state orig;
extern struct state _res;
static char *cname = NULL;
extern char *inet_ntoa();
extern char *sprintf();
extern u_long inet_addr();
int getclass = C_IN;
int gettype;
int verbose = 0;
int list = 0;
int server_specified = 0;
char *pr_class();
char *pr_rr();
char *pr_cdname();
char *pr_type();
main(c, v)
char **v;
{
unsigned addr;
register struct hostent *hp;
register char *s;
register inverse = 0;
register waitmode = 0;
char *oldcname;
int ncnames;
res_init();
_res.retrans = 5;
if (c < 2) {
fprintf(stderr, "Usage: host [-w] [-v] [-r] [-d] [-t querytype] [-c class] [-a] host [server]\n -w to wait forever until reply\n -v for verbose output\n -r to disable recursive processing\n -d to turn on debugging output\n -t querytype to look for
a specific type of information\n -c class to look for non-Internet data\n -a is equivalent to '-v -t *'\n");
exit(1);
}
while (c > 2 && v[1][0] == '-') {
if (strcmp (v[1], "-w") == 0) {
_res.retry = 1;
_res.retrans = 15;
waitmode = 1;
v++;
c--;
}
else if (strcmp (v[1], "-r") == 0) {
_res.options &= ~RES_RECURSE;
v++;
c--;
}
else if (strcmp (v[1], "-d") == 0) {
_res.options |= RES_DEBUG;
v++;
c--;
}
else if (strcmp (v[1], "-v") == 0) {
verbose = 1;
v++;
c--;
}
else if (strcmp (v[1], "-l") == 0) {
list = 1;
v++;
c--;
}
else if (strncmp (v[1], "-t", 2) == 0) {
v++;
c--;
gettype = parsetype(v[1]);
v++;
c--;
}
else if (strncmp (v[1], "-c", 2) == 0) {
v++;
c--;
getclass = parseclass(v[1]);
v++;
c--;
}
else if (strcmp (v[1], "-a") == 0) {
verbose = 1;
gettype = T_ANY;
v++;
c--;
}
}
if (c > 2) {
s = v[2];
server_specified++;
addr = inet_addr(s);
if (addr == -1) {
hp = gethostbyname(s);
if (hp == NULL) {
fprintf(stderr,"Error in looking up server name:\n");
