open_rw - open a file for reading and writing

       open_rw  opens  the  file  filename for reading and writing use and returns the file handle.  If the file
       does not exist, it will be created with mode 0644.  If there was an error opening or creating  the  file,
       open_rw returns -1 and sets errno accordingly.

       open_rw - open a file for reading and writing

open(2)

                                                                                                      open_rw(3)

#include<libowfat/open.h>

       int open_rw(const char *filename);