private Task <IPtyConnection> StartPseudoConsoleAsync(
PtyOptions options,
TraceSource trace,
CancellationToken cancellationToken)
{
// Create the in/out pipes
if (!CreatePipe(out SafePipeHandle inPipePseudoConsoleSide, out SafePipeHandle inPipeOurSide, null, 0))
{
throw new InvalidOperationException("Could not create an anonymous pipe", new Win32Exception());
}
if (!CreatePipe(out SafePipeHandle outPipeOurSide, out SafePipeHandle outPipePseudoConsoleSide, null, 0))
{
throw new InvalidOperationException("Could not create an anonymous pipe", new Win32Exception());
}
var coord = new Coord(options.Cols, options.Rows);
var pseudoConsoleHandle = new SafePseudoConsoleHandle();
int hr;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
// Run CreatePseudoConsole* in a CER to make sure we don't leak handles.
// MSDN suggest to put all CER code in a finally block
// See http://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.runtimehelpers.prepareconstrainedregions(v=vs.110).aspx
}
finally
{
// Create the Pseudo Console, using the pipes
hr = CreatePseudoConsole(coord, inPipePseudoConsoleSide.Handle, outPipePseudoConsoleSide.Handle, 0, out IntPtr hPC);
// Remember the handle inside the CER to prevent leakage
if (hPC != IntPtr.Zero && hPC != INVALID_HANDLE_VALUE)
{
pseudoConsoleHandle.InitialSetHandle(hPC);
}
}
if (hr != S_OK)
{
Marshal.ThrowExceptionForHR(hr);
}
// Prepare the StartupInfoEx structure attached to the ConPTY.
var startupInfo = default(STARTUPINFOEX);
startupInfo.InitAttributeListAttachedToConPTY(pseudoConsoleHandle);
IntPtr lpEnvironment = Marshal.StringToHGlobalUni(GetEnvironmentString(options.Environment));
try
{
string app = GetAppOnPath(options.App, options.Cwd, options.Environment);
string arguments = options.VerbatimCommandLine ?
WindowsArguments.FormatVerbatim(options.CommandLine) :
WindowsArguments.Format(options.CommandLine);
var commandLine = new StringBuilder(app.Length + arguments.Length + 4);
bool quoteApp = app.Contains(" ") && !app.StartsWith("\"") && !app.EndsWith("\"");
if (quoteApp)
{
commandLine.Append('"').Append(app).Append('"');
}
else
{
commandLine.Append(app);
}
if (!string.IsNullOrWhiteSpace(arguments))
{
commandLine.Append(' ');
commandLine.Append(arguments);
}
bool success;
int errorCode = 0;
var processInfo = default(PROCESS_INFORMATION);
var processHandle = new SafeProcessHandle();
var mainThreadHandle = new SafeThreadHandle();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
// Run CreateProcess* in a CER to make sure we don't leak handles.
}
finally
{
success = CreateProcess(
null, // lpApplicationName
commandLine.ToString(),
null, // lpProcessAttributes
null, // lpThreadAttributes
false, // bInheritHandles VERY IMPORTANT that this is false
EXTENDED_STARTUPINFO_PRESENT | CREATE_UNICODE_ENVIRONMENT, // dwCreationFlags
lpEnvironment,
options.Cwd,
ref startupInfo,
out processInfo);
if (!success)
{
errorCode = Marshal.GetLastWin32Error();
}
// Remember the handles inside the CER to prevent leakage
if (processInfo.hProcess != IntPtr.Zero && processInfo.hProcess != INVALID_HANDLE_VALUE)
{
processHandle.InitialSetHandle(processInfo.hProcess);
}
if (processInfo.hThread != IntPtr.Zero && processInfo.hThread != INVALID_HANDLE_VALUE)
{
mainThreadHandle.InitialSetHandle(processInfo.hThread);
}
}
if (!success)
{
var exception = new Win32Exception(errorCode);
throw new InvalidOperationException($"Could not start terminal process {commandLine.ToString()}: {exception.Message}", exception);
}
var connectionOptions = new PseudoConsoleConnection.PseudoConsoleConnectionHandles(
inPipePseudoConsoleSide,
outPipePseudoConsoleSide,
inPipeOurSide,
outPipeOurSide,
pseudoConsoleHandle,
processHandle,
processInfo.dwProcessId,
mainThreadHandle);
var result = new PseudoConsoleConnection(connectionOptions);
return(Task.FromResult <IPtyConnection>(result));
}
finally
{
startupInfo.FreeAttributeList();
if (lpEnvironment != IntPtr.Zero)
{
Marshal.FreeHGlobal(lpEnvironment);
}
}
}
private async Task <IPtyConnection> StartWinPtyTerminalAsync(
PtyOptions options,
TraceSource trace,
CancellationToken cancellationToken)
{
IntPtr error;
IntPtr config = winpty_config_new(WINPTY_FLAG_COLOR_ESCAPES, out error);
ThrowIfErrorOrNull("Error creating WinPTY config", error, config);
winpty_config_set_initial_size(config, options.Cols, options.Rows);
IntPtr handle = winpty_open(config, out error);
winpty_config_free(config);
ThrowIfErrorOrNull("Error launching WinPTY agent", error, handle);
string commandLine = options.VerbatimCommandLine ?
WindowsArguments.FormatVerbatim(options.CommandLine) :
WindowsArguments.Format(options.CommandLine);
string env = GetEnvironmentString(options.Environment);
string app = GetAppOnPath(options.App, options.Cwd, options.Environment);
trace.TraceInformation($"Starting terminal process '{app}' with command line {commandLine}");
IntPtr spawnConfig = winpty_spawn_config_new(
WINPTY_SPAWN_FLAG_AUTO_SHUTDOWN,
app,
commandLine,
options.Cwd,
env,
out error);
ThrowIfErrorOrNull("Error creating WinPTY spawn config", error, spawnConfig);
bool spawnSuccess = winpty_spawn(handle, spawnConfig, out SafeProcessHandle hProcess, out IntPtr thread, out int procError, out error);
winpty_spawn_config_free(spawnConfig);
if (!spawnSuccess)
{
if (procError != 0)
{
if (error != IntPtr.Zero)
{
winpty_error_free(error);
}
throw new InvalidOperationException($"Unable to start WinPTY terminal '{app}': {new Win32Exception(procError).Message} ({procError})");
}
ThrowIfError("Unable to start WinPTY terminal process", error, alwaysThrow: true);
}
Stream?writeToStream = null;
Stream?readFromStream = null;
try
{
writeToStream = await CreatePipeAsync(winpty_conin_name(handle), PipeDirection.Out, cancellationToken);
readFromStream = await CreatePipeAsync(winpty_conout_name(handle), PipeDirection.In, cancellationToken);
}
catch
{
writeToStream?.Dispose();
hProcess.Close();
winpty_free(handle);
throw;
}
return(new WinPtyConnection(readFromStream, writeToStream, handle, hProcess));
}