Can't open console device file `CONOUT$` on windows

CONOUT$ is similar to /dev/tty. You need to access it if you want to write to the terminal when the standard streams are redirected.

However, with GHC on Windows openFile "CONOUT$" WriteMode throws an exception (does not exist).

From what I understand, the issue stems from using getDevicePath at https://gitlab.haskell.org/ghc/ghc/-/blob/626652f7c172f307bd87afaee59c7f0e2825c55d/libraries/base/GHC/IO/Windows/Handle.hsc#L858, which maps the device name to "\\\\?\\UNC\\.\\CONOUT$"

Using e.g. System.Win32.File.createFile "CONOUT$" 0 0 Nothing oPEN_EXISTING 0 Nothing directly seems to work.

I haven't tried, but I assume other console related device files are affected in the same way.

I lack the Window expertise to be in a position to suggest a fix for this issue.

https://learn.microsoft.com/en-us/windows/console/console-handles

Steps to reproduce

ghci> import System.IO
ghci> openFile "CONOUT$" WriteMode

Expected behavior

A file handle is returned.

Environment

• GHC version used: 9.6.1

Optional:

• Operating System: Windows 10
• System Architecture: x64