/*     Watchdog fuer JENDATA ISA-Watchdog V0.0.2       */
/* 2001 Uwe Manzei - JENDATA Computersysteme GmbH Jena */

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char **argv)
{
	u_char a;
	int ch;
	int fd;
	optarg = NULL;
	/* get parameters: v - version; h - help; u - unload */
	while((ch=getopt(argc,argv,"huv"))!=-1)
	{
	        switch(ch)
	        {
		         case 'v':      printf("watchdog v 0.0.2\n");
	                                exit(0);
	                                break;
	                 case 'h':      printf("watchdog [-v][-h][-u]\n");
	                                exit(0);
	                                break;
	                 case 'u':	killit();
	                 		exit(0); 
	                 		break;
	         }
	}
	/* set timer to 220s */
	fd=open("/dev/port",O_WRONLY);
	if(fd==-1) 
	{
		perror("port");
		exit(1);
	}
	lseek(fd,0x443,SEEK_SET);
	a=220;
	write(fd,&a,1);
	close(fd);
	/* loop */
	fd=open("/dev/port",O_RDONLY);
	if(fd==-1) 
	{
		perror("port");
		exit(1);
	}	
	while(1)
	{
		lseek(fd,0x443,SEEK_SET);
		read(fd,&a,1);
		sleep(90);
	}
	exit(0);
}
	
/* disable timer */
killit()
{
	int fd;
	u_char a;
	fd=open("/dev/port",O_RDONLY);
	if(fd==-1) 
	{
		perror("port");
		exit(1);
	}
	lseek(fd,0x843,SEEK_SET);
	read(fd,&a,1);
	return(0);
}