mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 18:15:11 +00:00
18acf79551
Promote localization of cmd.exe. JIRA issue: CORE-19680 Add some resource strings. Use them instead of raw strings.
341 lines
10 KiB
C
341 lines
10 KiB
C
/*
|
|
* CTTY.C - ctty (Change TTY) command.
|
|
*
|
|
* This command redirects the first three standard handles
|
|
* stdin, stdout, stderr to another terminal.
|
|
*
|
|
*
|
|
* History:
|
|
*
|
|
* 14 Aug 1998 (John P Price)
|
|
* - Created dummy command.
|
|
*
|
|
* 2000/01/14 ska
|
|
* + Added to change the first three handles to the given device name
|
|
* + Supports only redirection of stdin and stdout, e.g.:
|
|
* C:\> CTTY COM1 >file
|
|
* -or-
|
|
* C:\> echo Hallo | CTTY COM1 | echo du
|
|
* The CTTY command effects the commands on the _next_ line.
|
|
*
|
|
* 20 Oct 2016 (Hermes Belusca-Maito)
|
|
* Port it to NT.
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
#if defined(INCLUDE_CMD_CTTY) && defined(FEATURE_REDIRECTION)
|
|
|
|
static WORD
|
|
CheckTerminalDeviceType(IN LPCTSTR pszName)
|
|
{
|
|
/* Console reserved "file" names */
|
|
static const LPCWSTR DosLPTDevice = L"LPT";
|
|
static const LPCWSTR DosCOMDevice = L"COM";
|
|
static const LPCWSTR DosPRNDevice = L"PRN";
|
|
static const LPCWSTR DosAUXDevice = L"AUX";
|
|
static const LPCWSTR DosCONDevice = L"CON";
|
|
static const LPCWSTR DosNULDevice = L"NUL";
|
|
|
|
LPCWSTR DeviceName;
|
|
ULONG DeviceNameInfo;
|
|
WORD DeviceType = 0; // 0: Unknown; 1: CON; 2: COM etc...
|
|
|
|
#ifndef _UNICODE // UNICODE means that TCHAR == WCHAR == UTF-16
|
|
/* Convert from the current process/thread's codepage to UTF-16 */
|
|
DWORD len = strlen(pszName) + 1;
|
|
WCHAR *buffer = cmd_alloc(len * sizeof(WCHAR));
|
|
if (!buffer)
|
|
{
|
|
// SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
|
return FALSE;
|
|
}
|
|
len = (DWORD)MultiByteToWideChar(CP_THREAD_ACP, // CP_ACP, CP_OEMCP
|
|
0, pszName, (INT)len, buffer, (INT)len);
|
|
DeviceName = buffer;
|
|
#else
|
|
DeviceName = pszName;
|
|
#endif
|
|
|
|
/*
|
|
* Check whether we deal with a DOS device, and if so,
|
|
* strip the path till the file name.
|
|
* Therefore, things like \\.\CON or C:\some_path\COM1
|
|
* are transformed into CON or COM1, for example.
|
|
*/
|
|
DeviceNameInfo = RtlIsDosDeviceName_U(DeviceName);
|
|
if (DeviceNameInfo != 0)
|
|
{
|
|
DeviceName = (LPCWSTR)((ULONG_PTR)DeviceName + ((DeviceNameInfo >> 16) & 0xFFFF));
|
|
|
|
if (_wcsnicmp(DeviceName, DosCONDevice, 3) == 0)
|
|
{
|
|
DeviceType = 1;
|
|
}
|
|
else
|
|
if ( _wcsnicmp(DeviceName, DosLPTDevice, 3) == 0 ||
|
|
_wcsnicmp(DeviceName, DosCOMDevice, 3) == 0 ||
|
|
_wcsnicmp(DeviceName, DosPRNDevice, 3) == 0 ||
|
|
_wcsnicmp(DeviceName, DosAUXDevice, 3) == 0 ||
|
|
_wcsnicmp(DeviceName, DosNULDevice, 3) == 0 )
|
|
{
|
|
DeviceType = 2;
|
|
}
|
|
// else DeviceType = 0;
|
|
}
|
|
|
|
#ifndef _UNICODE
|
|
cmd_free(buffer);
|
|
#endif
|
|
|
|
return DeviceType;
|
|
}
|
|
|
|
/*
|
|
* See also redir.c!PerformRedirection().
|
|
*
|
|
* The CTTY command allows only the usage of CON, COM, AUX, LPT, PRN and NUL
|
|
* DOS devices as valid terminal devices. Everything else is forbidden.
|
|
*
|
|
* CTTY does not set ERRORLEVEL on error.
|
|
*/
|
|
INT cmd_ctty(LPTSTR param)
|
|
{
|
|
static SECURITY_ATTRIBUTES SecAttr = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
|
|
|
|
BOOL Success;
|
|
WORD DeviceType;
|
|
HANDLE hDevice, hStdHandles[3]; // hStdIn, hStdOut, hStdErr;
|
|
|
|
/* The user asked for help */
|
|
if (_tcsncmp(param, _T("/?"), 2) == 0)
|
|
{
|
|
ConOutResPaging(TRUE, STRING_CTTY_HELP);
|
|
return 0;
|
|
}
|
|
|
|
if (!*param)
|
|
{
|
|
error_req_param_missing();
|
|
return 1;
|
|
}
|
|
|
|
/* Check whether this is a valid terminal device name */
|
|
DeviceType = CheckTerminalDeviceType(param);
|
|
if (DeviceType == 1)
|
|
{
|
|
/*
|
|
* Special case for CON device.
|
|
*
|
|
* We do not open CON with GENERIC_READ or GENERIC_WRITE as is,
|
|
* but instead we separately open CONIN$ and CONOUT$ with both
|
|
* GENERIC_READ | GENERIC_WRITE access.
|
|
* We do so because otherwise, opening in particular CON with GENERIC_WRITE
|
|
* only would open CONOUT$ with an handle not passing the IsConsoleHandle()
|
|
* test, meaning that we could not use the full console functionalities.
|
|
*/
|
|
BOOL bRetry = FALSE;
|
|
|
|
RetryOpenConsole:
|
|
/*
|
|
* If we previously failed in opening handles to the console,
|
|
* this means the existing console is almost destroyed.
|
|
* Close the existing console and allocate and open a new one.
|
|
*/
|
|
if (bRetry)
|
|
{
|
|
FreeConsole();
|
|
if (!AllocConsole())
|
|
return 1;
|
|
}
|
|
|
|
/* Attempt to retrieve a handle for standard input */
|
|
hStdHandles[0] = CreateFile(_T("CONIN$"),
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
&SecAttr,
|
|
OPEN_EXISTING,
|
|
0,
|
|
NULL);
|
|
if (hStdHandles[0] == INVALID_HANDLE_VALUE)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
|
|
if (bRetry)
|
|
return 1;
|
|
bRetry = TRUE;
|
|
goto RetryOpenConsole;
|
|
}
|
|
|
|
/* Attempt to retrieve a handle for standard output.
|
|
* Note that GENERIC_READ is needed for IsConsoleHandle() to succeed afterwards. */
|
|
hStdHandles[1] = CreateFile(_T("CONOUT$"),
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
&SecAttr,
|
|
OPEN_EXISTING,
|
|
0,
|
|
NULL);
|
|
if (hStdHandles[1] == INVALID_HANDLE_VALUE)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
|
|
CloseHandle(hStdHandles[0]);
|
|
|
|
if (bRetry)
|
|
return 1;
|
|
bRetry = TRUE;
|
|
goto RetryOpenConsole;
|
|
}
|
|
|
|
/* Duplicate a handle for standard error */
|
|
Success = DuplicateHandle(GetCurrentProcess(),
|
|
hStdHandles[1],
|
|
GetCurrentProcess(),
|
|
&hStdHandles[2],
|
|
0, // GENERIC_WRITE,
|
|
TRUE,
|
|
DUPLICATE_SAME_ACCESS /* 0 */);
|
|
if (!Success)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
CloseHandle(hStdHandles[1]);
|
|
CloseHandle(hStdHandles[0]);
|
|
return 1;
|
|
}
|
|
}
|
|
else if (DeviceType == 2)
|
|
{
|
|
/*
|
|
* COM and the other devices can only be opened once.
|
|
* Since we need different handles, we need to duplicate them.
|
|
*/
|
|
|
|
/* Attempt to retrieve a handle to the device for read/write access */
|
|
hDevice = CreateFile(param,
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
&SecAttr,
|
|
OPEN_EXISTING,
|
|
0, // FILE_FLAG_OVERLAPPED, // 0,
|
|
NULL);
|
|
if (hDevice == INVALID_HANDLE_VALUE)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
return 1;
|
|
}
|
|
|
|
/* Duplicate a handle for standard input */
|
|
Success = DuplicateHandle(GetCurrentProcess(),
|
|
hDevice,
|
|
GetCurrentProcess(),
|
|
&hStdHandles[0],
|
|
GENERIC_READ,
|
|
TRUE,
|
|
0);
|
|
if (!Success)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
CloseHandle(hDevice);
|
|
return 1;
|
|
}
|
|
|
|
/* Duplicate a handle for standard output */
|
|
Success = DuplicateHandle(GetCurrentProcess(),
|
|
hDevice,
|
|
GetCurrentProcess(),
|
|
&hStdHandles[1],
|
|
GENERIC_WRITE,
|
|
TRUE,
|
|
0);
|
|
if (!Success)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
CloseHandle(hStdHandles[0]);
|
|
CloseHandle(hDevice);
|
|
return 1;
|
|
}
|
|
|
|
/* Duplicate a handle for standard error */
|
|
Success = DuplicateHandle(GetCurrentProcess(),
|
|
hDevice,
|
|
GetCurrentProcess(),
|
|
&hStdHandles[2],
|
|
GENERIC_WRITE,
|
|
TRUE,
|
|
0);
|
|
if (!Success)
|
|
{
|
|
// TODO: Error
|
|
// error_no_rw_device(param);
|
|
CloseHandle(hStdHandles[1]);
|
|
CloseHandle(hStdHandles[0]);
|
|
CloseHandle(hDevice);
|
|
return 1;
|
|
}
|
|
|
|
/* Now get rid of the main device handle */
|
|
CloseHandle(hDevice);
|
|
}
|
|
else
|
|
{
|
|
ConOutResPrintf(STRING_ERROR_INVALID_DEVICE, param);
|
|
return 1;
|
|
}
|
|
|
|
#if 0
|
|
/* Now change the file descriptors:
|
|
0 := rdonly
|
|
1,2 := wronly
|
|
|
|
if CTTY is called within a pipe or its I/O is redirected,
|
|
oldinfd or oldoutfd is not equal to -1. In such case the
|
|
old*fd is modified in order to effect the file descriptor
|
|
after the redirections are restored. Otherwise a pipe or
|
|
redirection would left CTTY in a half-made status.
|
|
*/
|
|
// int failed;
|
|
failed = dup2(f, 2); /* no redirection support */
|
|
if(oldinfd != -1)
|
|
dos_close(oldinfd);
|
|
oldinfd = f;
|
|
if(oldoutfd != -1)
|
|
dos_close(oldoutfd);
|
|
if((oldoutfd = dup(f)) == -1)
|
|
failed = 1;
|
|
|
|
if(failed)
|
|
error_ctty_dup(param);
|
|
|
|
return failed;
|
|
#endif
|
|
|
|
/* Now set the standard handles */
|
|
|
|
hDevice = GetHandle(0);
|
|
if (hDevice != INVALID_HANDLE_VALUE)
|
|
CloseHandle(hDevice);
|
|
SetHandle(0, hStdHandles[0]);
|
|
|
|
hDevice = GetHandle(1);
|
|
if (hDevice != INVALID_HANDLE_VALUE)
|
|
CloseHandle(hDevice);
|
|
SetHandle(1, hStdHandles[1]);
|
|
|
|
hDevice = GetHandle(2);
|
|
if (hDevice != INVALID_HANDLE_VALUE)
|
|
CloseHandle(hDevice);
|
|
SetHandle(2, hStdHandles[2]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* INCLUDE_CMD_CTTY && FEATURE_REDIRECTION */
|
|
|
|
/* EOF */
|