#include <sys/tapes.h>
#include <sys/stat.h>
#include <fcntl.h>

int open(const char* pathname, int flags);
int open(const char* pathname, int flags, mode_t mode);	

#include <sys/types.h>
#include <unistd.h>

ssize_t read(int fd, void *buf, size_t count);
ssize_t write(int fd, cosnt void *buf, size_t count);
off_t lseek(int fildes, off_t offset, int whence);

SEEK_SET
SEEK_CUR
SEEK_END

#include <unistd.h>
int dup(int oldfd);
int dup2(int oldfd, int newfd);

STDIN_FILENO
STDOUT_FILENO
STDERR_FILENO

To be done: