#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <termios.h>
#include <unistd.h>

int
main(void)
{
	struct termios	told, tnew;

	if (tcgetattr(STDIN_FILENO, &told) == -1)
		err(errno, "tcgetattr");
	tnew = told;
	tnew.c_lflag &= ~(ECHO | ECHONL | ICANON);
	if (tcsetattr(STDIN_FILENO, TCSADRAIN, &tnew) == -1)
		err(errno, "tcsetattr");

	for (;;) {
		uint8_t	c;

		if (read(STDIN_FILENO, &c, 1) < 1)
			break;
		(void) fprintf(stdout, "%d, ", c);
		(void) fflush(stdout);
		if (c == 27)
			break;
	}

	if (tcsetattr(STDIN_FILENO, TCSADRAIN, &told) == -1)
		err(errno, "tcsetattr");
	exit(EXIT_SUCCESS);
}