// kompilacia: gcc -o priklad5 priklad5.c

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

int wait_for_input_2s () {
	fd_set set;
	struct timeval timeout;

	FD_ZERO(&set);
	FD_SET(0, &set); // 0 - stdin

	timeout.tv_sec = 2;
	timeout.tv_usec = 0;

	return select(FD_SETSIZE, &set, NULL, NULL, &timeout);
}

int main (int argc, char ** argv) {
	while (1) {
		printf("napis nieco a stlac ENTER: ");
		fflush(stdout);
		if (wait_for_input_2s() > 0) {
			char * str;
			scanf("%as", &str);
			printf("\nvyborne, vies aj pisat (%s)\n\n", str);
			break;
		} else {
			printf("\nnic si nenapisal, este raz,\n");
		}
	}

	exit(EXIT_SUCCESS);
}