#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>

int
main(void)
{
	int status;
	struct stat st;

	if ((status = fstat(STDIN_FILENO, &st)) != -1)
		printf("Before: %d\n", fstat(STDIN_FILENO, &st));
	else
		perror("fstat");

	sleep(5);

	if ((status = fstat(STDIN_FILENO, &st)) != -1)
		printf("After: %d\n", fstat(STDIN_FILENO, &st));
	else
		perror("fstat");

	return 0;
}