gistfile1.txt

#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <termios.h>


int
main(void)
{
	struct termios t;
	char foo[10];
	char pre[] = {27,91,49};
	char post[] = {126};
	int i=0;
	int f=0;

	tcgetattr(0,&t);
	t.c_lflag = t.c_lflag & ~(ICANON|ECHO);
	tcsetattr(0,TCSANOW,&t);
	while (1) {
		read(0,foo,1);
		if (i==5)
			i=0;
		if (i < 3 && pre[i] == foo[0]) {
			i++;
		} else if (i == 3) {
			f = *foo - 48;
			i++;
		} else if (i == 4 && post[0] == foo[0]) {
			i=5;
		} else if (i>0) {
			i=0;
			f=0;
		}
		if(*foo == '.')
			printf("period\n");
		if(*foo == 27)
			printf("esc\n");
		if(f && i==5)
			printf("f-key: %d\n",f);

		printf("foo: %d\n",*foo);
	}

	exit(EXIT_SUCCESS);
}