/*Detect idle time and blank screen
(sivann@sofltab.ece.ntua.gr sioan@mykonos.esd.ece.ntua.gr)*/

# include <sys/types.h>
# include <sundev/kbio.h>
# include <fcntl.h>
# include <sun/fbio.h>
# include <stdio.h>
# include <sys/stat.h>
# include <string.h>
# define TTYPATH "/dev"

main (argc,argv)
int argc;
char *argv[];
{
	char device[20];
	struct stat stats,stats_mouse,stats_kbd;
	time_t access_time,idle_time;
	time_t current_time;
	time_t kbd_access,kbd_idle;
	char tty[20];
	int     i,ip,fd;

	if (argc!=3) {
		fprintf(stderr,"Screen saver, Spiros Ioannou 1995\n");
		fprintf(stderr,"Usage: %s [tty] [delay]\n",argv[0]);
		exit(2);
	}

	if((fd = open("/dev/fb", O_RDWR)) == -1) {
		fprintf(stderr, "Cant open device\n");
		exit(1);
	}

	strcpy(tty,argv[1]);


	for (;;) {
		current_time = time ((time_t *)0);
		sprintf (device, "%s/%s", TTYPATH, tty);

		if (lstat (device, &stats) == -1
		    || (stats.st_mode & S_IFMT) == S_IFLNK)
			access_time=time(NULL);
		else
			access_time = stats.st_atime;
		idle_time=current_time - access_time;



		if (lstat ("/dev/kbd", &stats_kbd) == -1
		    || (stats_kbd.st_mode & S_IFMT) == S_IFLNK)
			kbd_access=time(NULL);
		else
			kbd_access = stats_kbd.st_atime;
		kbd_idle=current_time - kbd_access;

		if(idle_time>atol(argv[2]))  i=0;
		else i=1;
		if (ip!=i)ioctl(fd, FBIOSVIDEO, &i);
		ip=i;
		/*
     printf("Idle Terminal     :%d sec\n",idle_time );
     printf("Idle Keyboard or Mouse devices:%d sec\n",kbd_idle);
*/
		sleep(1);
	}
}