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using System;
using System.IO;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
namespace IPA.Injector
{
// https://stackoverflow.com/a/48864902/3117125
internal static class WinConsole
{
public static void Initialize(bool alwaysCreateNewConsole = true)
{
bool consoleAttached = true;
if (alwaysCreateNewConsole
|| (AttachConsole(AttachParent) == 0
&& Marshal.GetLastWin32Error() != ErrorAccessDenied))
{
consoleAttached = AllocConsole() != 0;
}
if (consoleAttached)
{
InitializeStreams();
}
}
public static void InitializeStreams()
{
InitializeOutStream();
InitializeInStream();
}
private static void InitializeOutStream()
{
var fs = CreateFileStream("CONOUT$", GenericWrite, FileShareWrite, FileAccess.Write);
if (fs != null)
{
var writer = new StreamWriter(fs) { AutoFlush = true };
Console.SetOut(writer);
Console.SetError(writer);
}
}
private static void InitializeInStream()
{
var fs = CreateFileStream("CONIN$", GenericRead, FileShareRead, FileAccess.Read);
if (fs != null)
{
Console.SetIn(new StreamReader(fs));
}
}
private static FileStream CreateFileStream(string name, uint win32DesiredAccess, uint win32ShareMode,
FileAccess dotNetFileAccess)
{
var file = new SafeFileHandle(CreateFileW(name, win32DesiredAccess, win32ShareMode, IntPtr.Zero, OpenExisting, FileAttributeNormal, IntPtr.Zero), true);
if (!file.IsInvalid)
{
var fs = new FileStream(file, dotNetFileAccess);
return fs;
}
return null;
}
#region Win API Functions and Constants
[DllImport("kernel32.dll",
EntryPoint = "AllocConsole",
SetLastError = true,
CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
private static extern int AllocConsole();
[DllImport("kernel32.dll",
EntryPoint = "AttachConsole",
SetLastError = true,
CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
private static extern uint AttachConsole(uint dwProcessId);
[DllImport("kernel32.dll",
EntryPoint = "CreateFileW",
SetLastError = true,
CharSet = CharSet.Unicode,
CallingConvention = CallingConvention.StdCall)]
private static extern IntPtr CreateFileW(
string lpFileName,
uint dwDesiredAccess,
uint dwShareMode,
IntPtr lpSecurityAttributes,
uint dwCreationDisposition,
uint dwFlagsAndAttributes,
IntPtr hTemplateFile
);
private const uint GenericWrite = 0x40000000;
private const uint GenericRead = 0x80000000;
private const uint FileShareRead = 0x00000001;
private const uint FileShareWrite = 0x00000002;
private const uint OpenExisting = 0x00000003;
private const uint FileAttributeNormal = 0x80;
private const uint ErrorAccessDenied = 5;
private const uint AttachParent = 0xFFFFFFFF;
#endregion
}
}