Direct IO Functions
 
Table of Contents
- dio_close — Closes the file descriptor given by fd
 - dio_fcntl — Performs a c library fcntl on fd
 - dio_open — Opens a new filename with specified permissions of flags and
   creation permissions of mode
 - dio_read — Reads bytes from a file descriptor
 - dio_seek — Seeks to pos on fd from whence
 - dio_stat — Gets stat information about the file descriptor fd
 - dio_tcsetattr — Sets terminal attributes and baud rate for a serial port
 - dio_truncate — Truncates file descriptor fd to offset bytes
 - dio_write — Writes data to fd with optional truncation at length