/* sample unix system 5 set and reset raw mode with zero read delay */

#include <termio.h>
#define SGTTY struct termio
#include <term.h>
struct termio ttyold, ttynew;

setraw ()
{
	iocttl (0, TCGETA, &ttyold); /* get termio structure for terminal */
	ttynew = ttyold; /* copy termio structure for modification */
	ttynew.c_oflag = ttynew.c_lflag = 0; /* raw mode */
	/* omit "| IXON | IXOFF" on next line for full raw mode */
	ttynew.c_iflag = IGNBRK | IGNPAR | IXON | IXOFF; /* with xon/xoff */
	ttynew.c_cc[VTIME] = 0; /* max time to wait for a char ( in 0.1 sec) */
	ttynew.c_cc[VMIN] = 0; /* number of chaaracters in shortest message */
	ioctl (0, TCSETA, &ttynew); /* set termi structure for terminal */
}

resetraw ()
{
	ioctl (0, TCSETA, &ttyold); /* reset termi structure for terminal */
}

main()
{
	setraw(); /* set terminal into raw mode, zero read delay */
	/* in a statement of the following form:
	cur_bytes = read (0, buffer, max_bytes);
		cur_bytes will indicate the number of bytes
		(from 0 to max_bytes) transferred to buffer. */
	resetraw(); /* if terminal is not reset, it will remain in raw mode */
}