PInvoking stdin, stdout and stderr to unmanaged dll

I have a C header file that contains something like this:

void init(FILE* in, FILE* out, FILE* err);

I'm guessing this equates to the following PInvoke signature:

[DllImportAttribute("mylib", EntryPoint = "init")]
public static extern void init(IntPtr @in, IntPtr @out, IntPtr err);

Incidentally, I want to invoke this method. Can I get the IntPtr from Console.In, Console.Out, Console.Error somehow?

It should work on Linux and Windows, and not Windows exclusively.

Solution

You can use GetStdHandle to obtain handles to the standart input(STD_INPUT_HANDLE), output(STD_OUTPUT_HANDLE) and error(STD_ERROR_HANDLE) file.

You can then write and read from those files using WriteFile, ReadFile functions.

After that, if you still need a FILE structure, follow these steps to create one.