/* Here is a program to convert your hosts.net to domain.txt */
#include <stdio.h>
#include <ctype.h>
#include <string.h>

#define LINELEN 256
/* copyright 1989 - John D. Hays, KD7UW */
main(int argc,char *argv[])
{

	FILE *fi,*fo;
	char string[LINELEN-1];
	char addr[20],hname1[80],hname2[80];
	char *x,*y,*z;
	int cnt;

	fprintf(stderr,"COPYRIGHT 1989 - John D. Hays, KD7UW\n");
	if (argc != 3) 
	{
	fprintf(stderr,"Usage: %s input-hosts.net output-domain.txt\n\007",
		argv[0]);
	exit(0);
	}

	if ((fi=fopen(argv[1],"r")) != NULL)
	{
		fo = fopen(argv[2],"w");
		while (fgets(string,LINELEN,fi) != NULL)
		{
			
			y = strchr(string,'\n');
			*y = '\0';
			addr[0] = '\0';
			hname1[0] = '\0';
			hname2[0] = '\0';

			if ((string[0] == '#') || (strlen(string) < 3))
			{
			fprintf(fo,"%s\n",string);
			goto foo;
			}
			y = strchr(string,'#');
			if (y != NULL) 
			{
			fprintf(fo,"#%s\n",y);
			*y = '\0';
			}
			sscanf(string,"%s%s%s",addr,hname1,hname2);
			if (strchr(hname1,'.'))
			{
			x = hname1;
			z = hname2;
			}
			else
			{
			x = hname2;
			z = hname1;
			}
			if ((*x == '\0') || (*z == '\0'))
			{
			fprintf(fo,"%s.\tIN\tA\t%s\n",hname1,addr);
			}
			else
			{
			fprintf(fo,"%s.\tIN\tA\t%s\n",x,addr);
			fprintf(fo,"%s.\tIN\tCNAME\t%s.\n",z,x);
			}
foo:      		fprintf(stderr,"%s\n",string);
		}
	}
}