Call the operating-system open call
To open a file, the mi_file_open() function calls the open system call that your operating system supports.
On UNIX or Linux, the open() system call opens an operating-system file.
On Windows, the _open command opens an operating-system file.
The mi_file_open() function provides
the following information about the file to the appropriate system
call.
| Argument of mi_file_open() | Information provided |
|---|---|
| open_flags (second argument) | Access mode for the operating-system file |
| open_mode (third argument) | Open mode for the operating-system file. |
The function takes this information and passes it directly
to the underlying operating-system call. Therefore, mi_file_open() supports
the access modes and open modes that your operating-system open call
supports.
Tip: For more information about the open flags
and open mode, see the documentation for your operating-system open call.