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