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RaftWin32.cpp
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RaftWin32.cpp
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/*
* Includes
*/
#include "stdafx.h"
/*
* Defines
*/
// Uncomment to enable extra debug print statements
//#define DEBUG
#ifdef DEBUG
#define DEBUG_PRINT(x) wprintf(L"[DEBUG] %s\n", x)
#else
#define DEBUG_PRINT(x)
#endif
#define WSL_EXEC L"wsl.exe"
#define OUTBUF_SIZE 4096
/*
* Global Vars
*/
//static HANDLE parent_stdin = GetStdHandle(STD_INPUT_HANDLE);
//static HANDLE stdi_thread;
//static bool stdithread_open;
static HANDLE stdo_thread;
static HANDLE handle_out;
static HANDLE handle_in;
static HANDLE wrapper_stdout;
static HANDLE wrapper_stdin;
static HANDLE conpty_stdout;
static HANDLE conpty_stdin;
static HANDLE parent_stdout = GetStdHandle(STD_OUTPUT_HANDLE);
static bool conpty_open;
static bool stdothread_open;
static HPCON wsl_conpty;
static STARTUPINFOEXW startup_info_ex;
static PROCESS_INFORMATION process_info;
/*
* Function Decs
*/
//static void __cdecl _ProcessConPTYStdi(LPVOID context);
static void __cdecl _ProcessConPTYStdo(LPVOID context);
static void _EnableConsoleVTProcessing(void);
static COORD _GetConPTYDimen(void);
static void _InitConPTYAndPipes(void);
static void _InitConPTYStartupInfo(void);
static void _WslExec(std::wstring* command_str);
static void _CloseHandles(void);
static void _ExitError(const WCHAR* errorstr);
/*
* Function Defs
*/
int wmain(const int argc, const WCHAR** argv)
{
// Initial check
if (argc <= 1) _ExitError(L"No arguments supplied");
// Function variables
int i;
std::wstring command_str = std::wstring(WSL_EXEC);
// Convert supplied arguments to string for use in _WslExec
for (i = 1; i < argc; ++i) {
command_str.append(L" ");
command_str.append(argv[i]);
}
DEBUG_PRINT(command_str.c_str());
// Setup and create pseudo console
_EnableConsoleVTProcessing();
_InitConPTYAndPipes();
_InitConPTYStartupInfo();
// Execute command and handle stdio via ConPTY!
_WslExec(&command_str);
return EXIT_SUCCESS;
}
static void _EnableConsoleVTProcessing(void)
{
DEBUG_PRINT(L"Getting console mode and enabling VT processing");
DWORD console_mode;
// Enable console VT processing
if (!GetConsoleMode(parent_stdout, &console_mode))
_ExitError(L"Unable to get console stdout mode");
if (!SetConsoleMode(parent_stdout, console_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING))
_ExitError(L"Unable to set console stdin mode");
//if (!GetConsoleMode(parent_stdin, &console_mode))
// _ExitError(L"Unable to get console stdin mode");
//if (!SetConsoleMode(parent_stdin, console_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING))
// _ExitError(L"Unable to set console stdin mode");
}
static COORD _GetConPTYDimen(void)
{
COORD con_size;
CONSOLE_SCREEN_BUFFER_INFO con_buf_info;
DEBUG_PRINT(L"Getting console screen buffer info...");
if (!GetConsoleScreenBufferInfo(parent_stdout, &con_buf_info))
_ExitError(L"Unable to get console screen buffer info");
con_size.X = con_buf_info.srWindow.Right - con_buf_info.srWindow.Left + 1;
con_size.Y = con_buf_info.srWindow.Bottom - con_buf_info.srWindow.Top + 1;
#ifdef DEBUG
WCHAR debug_str[16];
swprintf_s(debug_str, L"X=%i, Y=%i", con_size.X, con_size.Y);
DEBUG_PRINT(debug_str);
#endif
return con_size;
}
static void _InitConPTYAndPipes(void)
{
// Create the in/out pipes
DEBUG_PRINT(L"Creating pipes...");
conpty_stdin = INVALID_HANDLE_VALUE;
conpty_stdout = INVALID_HANDLE_VALUE;
if (!CreatePipe(&conpty_stdin, &wrapper_stdout, NULL, 0) ||
!CreatePipe(&wrapper_stdin, &conpty_stdout, NULL, 0)
) _ExitError(L"Unable to create pipes");
// Create ConPTY using pipes
DEBUG_PRINT(L"Creating ConPTY...");
if (CreatePseudoConsole(
_GetConPTYDimen(), // Initial dimensions
conpty_stdin,
conpty_stdout,
0,
&wsl_conpty
) != S_OK) _ExitError(L"Unable to create ConPTY");
conpty_open = TRUE;
// Can close handles to PTY end of pipes here as handles dupe'd into
// ConHost and released after ConPTY destroyed
if (conpty_stdin == INVALID_HANDLE_VALUE ||
conpty_stdout == INVALID_HANDLE_VALUE)
_ExitError(L"ConPTY pipe handle(s) invalid");
else {
CloseHandle(conpty_stdin);
CloseHandle(conpty_stdout);
}
}
static void _InitConPTYStartupInfo(void)
{
DEBUG_PRINT(L"Initializing ConPTY STARTUPINFO");
SIZE_T size = 0;
startup_info_ex.StartupInfo.cb = sizeof(STARTUPINFOEX);
// Create appropriate size thread attr list
InitializeProcThreadAttributeList(NULL, 1, 0, &size);
startup_info_ex.lpAttributeList = reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(malloc(size));
// Set STARTUPINFO attr list & init
if (startup_info_ex.lpAttributeList == NULL ||
!InitializeProcThreadAttributeList(
startup_info_ex.lpAttributeList,
1,
0,
(PSIZE_T) &size
)) _ExitError(L"Unable to initialize STARTUPINFOEX attribute list");
// Set thread attr list's ConPTY to the specified ConPTY
if (startup_info_ex.lpAttributeList != 0 &&
!UpdateProcThreadAttribute(
startup_info_ex.lpAttributeList,
0,
PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE,
wsl_conpty,
sizeof(HPCON),
NULL,
NULL
)) _ExitError(L"Unable to set STARTUPINFOEX attribute list to specified ConPTY");
return;
}
static void _WslExec(std::wstring* command_str)
{
// Create stdio processing threads
DEBUG_PRINT(L"Creating ConPTY stdio processing threads...");
stdo_thread = INVALID_HANDLE_VALUE;
//stdi_thread = INVALID_HANDLE_VALUE;
stdo_thread = reinterpret_cast<HANDLE>(_beginthread(_ProcessConPTYStdo, 0, wrapper_stdin));
//stdi_thread = reinterpret_cast<HANDLE>(_beginthread(_ProcessConPTYStdi, 0, wrapper_stdout));
if (stdo_thread == INVALID_HANDLE_VALUE /* ||
stdi_thread == INVALID_HANDLE_VALUE */) {
_ExitError(L"Unable to create ConPTY stdio processing threads");
}
stdothread_open = TRUE;
//stdithread_open = TRUE;
// Create process
DEBUG_PRINT(L"Creating wsl.exe process...");
if (!CreateProcessW(
NULL, // No module name, use commandline
LPWSTR(command_str->c_str()), // Passed command (incl. arguments)
NULL, // Process handle not inheritable
NULL, // Thread handle not inheritable
FALSE, // Handle inheritance
EXTENDED_STARTUPINFO_PRESENT, // No creation flags
NULL, // Use parent's environment block
NULL, // Use parent's directory block
&startup_info_ex.StartupInfo, // Ptr to STARTUPINFO block
&process_info // Ptr to PROCESSINFO block
)) _ExitError(L"Unable to create wsl.exe process");
// Read stdout pipe in our read thread, then stop when wsl.exe finished
WaitForSingleObject(process_info.hProcess, INFINITE);
Sleep(500);
// Close handles and exit
_CloseHandles();
ExitProcess(EXIT_SUCCESS);
}
static void __cdecl _ProcessConPTYStdo(LPVOID context)
{
DWORD byte_read;
DWORD byte_written;
CHAR char_buffer[OUTBUF_SIZE];
for (;;) {
if (!ReadFile(wrapper_stdin, char_buffer, OUTBUF_SIZE, &byte_read, NULL)
|| byte_read == 0)
break;
WriteFile(parent_stdout, char_buffer, byte_read, &byte_written, NULL);
}
}
static void _CloseHandles(void)
{
DEBUG_PRINT(L"Closing handles");
// Close read/write thread
if (stdothread_open) {
DEBUG_PRINT(L"Closing stdo threads");
CloseHandle(stdo_thread);
}
// if (stdithread_open) {
// DEBUG_PRINT(L"Closing stdi thread");
// CloseHandle(stdi_thread);
// }
// Close ConPTY
if (conpty_open) {
DEBUG_PRINT(L"Closing ConPTY, ConHost and attached clients");
ClosePseudoConsole(wsl_conpty);
}
}
static void _ExitError(const WCHAR* errorstr)
{
DWORD dword = GetLastError();
if (dword != 0) {
LPVOID lp_mesg_buf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dword,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)& lp_mesg_buf,
0,
NULL
);
wprintf(L"\n[ERROR] %s: %s\n", errorstr, (LPWSTR) lp_mesg_buf);
LocalFree(lp_mesg_buf);
}
else {
wprintf(L"[ERROR] %s\n", errorstr);
}
_CloseHandles();
ExitProcess(EXIT_FAILURE);
}
//static void __cdecl _ProcessConPTYStdi(LPVOID context)
//{
// DWORD byte_read;
// DWORD byte_written;
// CHAR char_buffer[OUTBUF_SIZE];
//
// for (;;) {
// if (!ReadFile(parent_stdin, char_buffer, OUTBUF_SIZE, &byte_read, NULL)
// || byte_read == 0)
// break;
//
// WriteFile(wrapper_stdin, char_buffer, byte_read, &byte_written, NULL);
// }
//}