#include <sys/types.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>

int main()
{
	int fd = open("win2k.iso", O_RDONLY);

	if (fd == -1) {
		printf("Failed to open file: %s\n", strerror(errno));
		return 0;
	}

	for (int i = 0; i < 100000000; ++i) {
#if 1
		int pos = lseek(fd, 0, SEEK_CUR);
		if (pos == -1) {
			printf("Failed to seek (pos): %s\n", strerror(errno));
			return 0;
		}

		int length = lseek(fd, 0, SEEK_END);
		if (length == -1) {
			printf("Failed to seek (length): %s\n", strerror(errno));
			return 0;
		}

		if (lseek(fd, pos, SEEK_SET) == -1) {
			printf("Failed to seek (return): %s\n", strerror(errno));
			return 0;
		}
#else
		struct stat buf;
		if (fstat(fd, &buf) == -1) {
			printf("Failed to stat: %s\n", strerror(errno));
			return 0;
		}
#endif
	}
};