Windows isn't unusual for the CRLF translation part. Unix based operating systems, such as Linux, MacOS and the BSDs, do something similar. When writing to a

Windows isn't unusual for the CRLF translation part. Unix based operating systems, such as Linux, MacOS and the BSDs, do something similar. When writing to a terminal device, which can be a console device, the terminal driver performs CRLF conversions and other special character handling depending on the terminal settings. If an application wants to disable these character operations on a terminal device it has to explicitly turn them off, which is a bit like using _O_BINARY on Windows. CRLF conversions aren't done in the application's stdio code, but the effect is similar to a Windows console fd.