Since we now have write support, we can add O_WRONLY and O_RDWR to fcntl.h :)
read() and close() are in unistd.h, but open() in fnctl.h. I thought only the definitions for O_SOMETHING were in fnctl.h, but it is as it is. Don't know why, but let's not anger the Unix gods. The FILE* C API is pending as well.
