/*
* tclWinFile.c --
*
* This file contains temporary wrappers around UNIX file handling
* functions. These wrappers map the UNIX functions to Win32 HANDLE-style
* files, which can be manipulated through the Win32 console redirection
* interfaces.
*
* Copyright © 1995-1998 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclWinInt.h"
#include "tclFileSystem.h"
#include <winioctl.h>
#include <shlobj.h>
#include <lm.h> /* For TclpGetUserHome(). */
#include <userenv.h> /* For TclpGetUserHome(). */
#include <aclapi.h> /* For GetNamedSecurityInfo */
#ifdef _MSC_VER
# pragma comment(lib, "userenv.lib")
#endif
/*
* The number of 100-ns intervals between the Windows system epoch (1601-01-01
* on the proleptic Gregorian calendar) and the Posix epoch (1970-01-01).
*/
#define POSIX_EPOCH_AS_FILETIME \
((long long) 116444736 * (long long) 1000000000)
/*
* Declarations for 'link' related information. This information should come
* with VC++ 6.0, but is not in some older SDKs. In any case it is not well
* documented.
*/
#ifndef IO_REPARSE_TAG_RESERVED_ONE
# define IO_REPARSE_TAG_RESERVED_ONE 0x000000001
#endif
#ifndef IO_REPARSE_TAG_RESERVED_RANGE
# define IO_REPARSE_TAG_RESERVED_RANGE 0x000000001
#endif
#ifndef IO_REPARSE_TAG_VALID_VALUES
# define IO_REPARSE_TAG_VALID_VALUES 0x0E000FFFF
#endif
#ifndef IO_REPARSE_TAG_HSM
# define IO_REPARSE_TAG_HSM 0x0C0000004
#endif
#ifndef IO_REPARSE_TAG_NSS
# define IO_REPARSE_TAG_NSS 0x080000005
#endif
#ifndef IO_REPARSE_TAG_NSSRECOVER
# define IO_REPARSE_TAG_NSSRECOVER 0x080000006
#endif
#ifndef IO_REPARSE_TAG_SIS
# define IO_REPARSE_TAG_SIS 0x080000007
#endif
#ifndef IO_REPARSE_TAG_DFS
# define IO_REPARSE_TAG_DFS 0x080000008
#endif
#ifndef IO_REPARSE_TAG_RESERVED_ZERO
# define IO_REPARSE_TAG_RESERVED_ZERO 0x00000000
#endif
#ifndef FILE_FLAG_OPEN_REPARSE_POINT
# define FILE_FLAG_OPEN_REPARSE_POINT 0x00200000
#endif
#ifndef IO_REPARSE_TAG_MOUNT_POINT
# define IO_REPARSE_TAG_MOUNT_POINT 0xA0000003
#endif
#ifndef IsReparseTagValid
# define IsReparseTagValid(x) \
(!((x)&~IO_REPARSE_TAG_VALID_VALUES)&&((x)>IO_REPARSE_TAG_RESERVED_RANGE))
#endif
#ifndef IO_REPARSE_TAG_SYMBOLIC_LINK
# define IO_REPARSE_TAG_SYMBOLIC_LINK IO_REPARSE_TAG_RESERVED_ZERO
#endif
#ifndef FILE_SPECIAL_ACCESS
# define FILE_SPECIAL_ACCESS (FILE_ANY_ACCESS)
#endif
#ifndef FSCTL_SET_REPARSE_POINT
# define FSCTL_SET_REPARSE_POINT \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 41, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
# define FSCTL_GET_REPARSE_POINT \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
# define FSCTL_DELETE_REPARSE_POINT \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 43, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
#endif
#ifndef INVALID_FILE_ATTRIBUTES
#define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
#endif
/*
* Maximum reparse buffer info size. The max user defined reparse data is
* 16KB, plus there's a header.
*/
#define MAX_REPARSE_SIZE 17000
/*
* Undocumented REPARSE_MOUNTPOINT_HEADER_SIZE structure definition. This is
* found in winnt.h.
*
* IMPORTANT: caution when using this structure, since the actual structures
* used will want to store a full path in the 'PathBuffer' field, but there
* isn't room (there's only a single WCHAR!). Therefore one must artificially
* create a larger space of memory and then cast it to this type. We use the
* 'DUMMY_REPARSE_BUFFER' struct just below to deal with this problem.
*/
#define REPARSE_MOUNTPOINT_HEADER_SIZE 8
#ifndef REPARSE_DATA_BUFFER_HEADER_SIZE
typedef struct _REPARSE_DATA_BUFFER {
DWORD ReparseTag;
WORD ReparseDataLength;
WORD Reserved;
union {
struct {
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
ULONG Flags;
WCHAR PathBuffer[1];
} SymbolicLinkReparseBuffer;
struct {
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
WCHAR PathBuffer[1];
} MountPointReparseBuffer;
struct {
BYTE DataBuffer[1];
} GenericReparseBuffer;
};
} REPARSE_DATA_BUFFER;
#endif
typedef struct {
REPARSE_DATA_BUFFER dummy;
WCHAR dummyBuf[MAX_PATH * 3];
} DUMMY_REPARSE_BUFFER;
/*
* Other typedefs required by this code.
*/
static __time64_t ToCTime(FILETIME fileTime);
static void FromCTime(__time64_t posixTime, FILETIME *fileTime);
/*
* Declarations for local functions defined in this file:
*/
static int NativeAccess(const WCHAR *path, int mode);
static int NativeDev(const WCHAR *path);
static int NativeStat(const WCHAR *path, Tcl_StatBuf *statPtr,
int checkLinks);
static unsigned short NativeStatMode(DWORD attr, int checkLinks,
int isExec);
static int NativeIsExec(const WCHAR *path);
static int NativeReadReparse(const WCHAR *LinkDirectory,
REPARSE_DATA_BUFFER *buffer, DWORD desiredAccess);
static int NativeWriteReparse(const WCHAR *LinkDirectory,
REPARSE_DATA_BUFFER *buffer);
static int NativeMatchType(int isDrive, DWORD attr,
const WCHAR *nativeName, Tcl_GlobTypeData *types);
static int WinIsDrive(const char *name, size_t nameLen);
static size_t WinIsReserved(const char *path);
static Tcl_Obj * WinReadLink(const WCHAR *LinkSource);
static Tcl_Obj * WinReadLinkDirectory(const WCHAR *LinkDirectory);
static int WinLink(const WCHAR *LinkSource,
const WCHAR *LinkTarget, int linkAction);
static int WinSymLinkDirectory(const WCHAR *LinkDirectory,
const WCHAR *LinkTarget);
MODULE_SCOPE void tclWinDebugPanic(const char *format, ...);
/*
*--------------------------------------------------------------------
*
* WinLink --
*
* Make a link from source to target.
*
*--------------------------------------------------------------------
*/
static int
WinLink(
const WCHAR *linkSourcePath,
const WCHAR *linkTargetPath,
int linkAction)
{
WCHAR tempFileName[MAX_PATH];
WCHAR *tempFilePart;
DWORD attr;
/*
* Get the full path referenced by the target.
*/
if (!GetFullPathNameW(linkTargetPath, MAX_PATH, tempFileName,
&tempFilePart)) {
/*
* Invalid file.
*/
Tcl_WinConvertError(GetLastError());
return -1;
}
/*
* Make sure source file doesn't exist.
*/
attr = GetFileAttributesW(linkSourcePath);
if (attr != INVALID_FILE_ATTRIBUTES) {
Tcl_SetErrno(EEXIST);
return -1;
}
/*
* Get the full path referenced by the source file/directory.
*/
if (!GetFullPathNameW(linkSourcePath, MAX_PATH, tempFileName,
&tempFilePart)) {
/*
* Invalid file.
*/
Tcl_WinConvertError(GetLastError());
return -1;
}
/*
* Check the target.
*/
attr = GetFileAttributesW(linkTargetPath);
if (attr == INVALID_FILE_ATTRIBUTES) {
/*
* The target doesn't exist.
*/
Tcl_WinConvertError(GetLastError());
} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
/*
* It is a file.
*/
if (linkAction & TCL_CREATE_HARD_LINK) {
if (CreateHardLinkW(linkSourcePath, linkTargetPath, NULL)) {
/*
* Success!
*/
return 0;
}
Tcl_WinConvertError(GetLastError());
} else if (linkAction & TCL_CREATE_SYMBOLIC_LINK) {
if (CreateSymbolicLinkW(linkSourcePath, linkTargetPath,
0x2 /* SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE */)) {
/*
* Success!
*/
return 0;
} else {
Tcl_WinConvertError(GetLastError());
}
} else {
Tcl_SetErrno(ENODEV);
}
} else {
/*
* We've got a directory. Now check whether what we're trying to do is
* reasonable.
*/
if (linkAction & TCL_CREATE_SYMBOLIC_LINK) {
return WinSymLinkDirectory(linkSourcePath, linkTargetPath);
} else if (linkAction & TCL_CREATE_HARD_LINK) {
/*
* Can't hard link directories.
*/
Tcl_SetErrno(EISDIR);
} else {
Tcl_SetErrno(ENODEV);
}
}
return -1;
}
/*
*--------------------------------------------------------------------
*
* WinReadLink --
*
* What does 'LinkSource' point to?
*
*--------------------------------------------------------------------
*/
static Tcl_Obj *
WinReadLink(
const WCHAR *linkSourcePath)
{
WCHAR tempFileName[MAX_PATH];
WCHAR *tempFilePart;
DWORD attr;
/*
* Get the full path referenced by the target.
*/
if (!GetFullPathNameW(linkSourcePath, MAX_PATH, tempFileName,
&tempFilePart)) {
/*
* Invalid file.
*/
Tcl_WinConvertError(GetLastError());
return NULL;
}
/*
* Make sure source file does exist.
*/
attr = GetFileAttributesW(linkSourcePath);
if (attr == INVALID_FILE_ATTRIBUTES) {
/*
* The source doesn't exist.
*/
Tcl_WinConvertError(GetLastError());
return NULL;
} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
/*
* It is a file - this is not yet supported.
*/
Tcl_SetErrno(ENOTDIR);
return NULL;
}
return WinReadLinkDirectory(linkSourcePath);
}
/*
*--------------------------------------------------------------------
*
* WinSymLinkDirectory --
*
* This routine creates a NTFS junction, using the undocumented
* FSCTL_SET_REPARSE_POINT structure Win2K uses for mount points and
* junctions.
*
* Assumption that linkTargetPath is a valid, existing directory.
*
* Returns:
* Zero on success.
*
*--------------------------------------------------------------------
*/
static int
WinSymLinkDirectory(
const WCHAR *linkDirPath,
const WCHAR *linkTargetPath)
{
DUMMY_REPARSE_BUFFER dummy;
REPARSE_DATA_BUFFER *reparseBuffer = (REPARSE_DATA_BUFFER *) &dummy;
int len;
WCHAR nativeTarget[MAX_PATH];
WCHAR *loop;
/*
* Make the native target name.
*/
memcpy(nativeTarget, L"\\??\\", 4 * sizeof(WCHAR));
memcpy(nativeTarget + 4, linkTargetPath,
sizeof(WCHAR) * (1+wcslen((WCHAR *) linkTargetPath)));
len = wcslen(nativeTarget);
/*
* We must have backslashes only. This is VERY IMPORTANT. If we have any
* forward slashes everything appears to work, but the resulting symlink
* is useless!
*/
for (loop = nativeTarget; *loop != 0; loop++) {
if (*loop == '/') {
*loop = '\\';
}
}
if ((nativeTarget[len-1] == '\\') && (nativeTarget[len-2] != ':')) {
nativeTarget[len-1] = 0;
}
/*
* Build the reparse info.
*/
memset(reparseBuffer, 0, sizeof(DUMMY_REPARSE_BUFFER));
reparseBuffer->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
reparseBuffer->MountPointReparseBuffer.SubstituteNameLength =
wcslen(nativeTarget) * sizeof(WCHAR);
reparseBuffer->Reserved = 0;
reparseBuffer->MountPointReparseBuffer.PrintNameLength = 0;
reparseBuffer->MountPointReparseBuffer.PrintNameOffset =
reparseBuffer->MountPointReparseBuffer.SubstituteNameLength
+ sizeof(WCHAR);
memcpy(reparseBuffer->MountPointReparseBuffer.PathBuffer, nativeTarget,
sizeof(WCHAR)
+ reparseBuffer->MountPointReparseBuffer.SubstituteNameLength);
reparseBuffer->ReparseDataLength =
reparseBuffer->MountPointReparseBuffer.SubstituteNameLength+12;
return NativeWriteReparse(linkDirPath, reparseBuffer);
}
/*
*--------------------------------------------------------------------
*
* TclWinSymLinkCopyDirectory --
*
* Copy a Windows NTFS junction. This function assumes that LinkOriginal
* exists and is a valid junction point, and that LinkCopy does not
* exist.
*
* Returns:
* Zero on success.
*
*--------------------------------------------------------------------
*/
int
TclWinSymLinkCopyDirectory(
const WCHAR *linkOrigPath, /* Existing junction - reparse point */
const WCHAR *linkCopyPath) /* Will become a duplicate junction */
{
DUMMY_REPARSE_BUFFER dummy;
REPARSE_DATA_BUFFER *reparseBuffer = (REPARSE_DATA_BUFFER *) &dummy;
if (NativeReadReparse(linkOrigPath, reparseBuffer, GENERIC_READ)) {
return -1;
}
return NativeWriteReparse(linkCopyPath, reparseBuffer);
}
/*
*--------------------------------------------------------------------
*
* TclWinSymLinkDelete --
*
* Delete a Windows NTFS junction. Once the junction information is
* deleted, the filesystem object becomes an ordinary directory. Unless
* 'linkOnly' is given, that directory is also removed.
*
* Assumption that LinkOriginal is a valid, existing junction.
*
* Returns:
* Zero on success.
*
*--------------------------------------------------------------------
*/
int
TclWinSymLinkDelete(
const WCHAR *linkOrigPath,
int linkOnly)
{
/*
* It is a symbolic link - remove it.
*/
DUMMY_REPARSE_BUFFER dummy;
REPARSE_DATA_BUFFER *reparseBuffer = (REPARSE_DATA_BUFFER *) &dummy;
HANDLE hFile;
DWORD returnedLength;
memset(reparseBuffer, 0, sizeof(DUMMY_REPARSE_BUFFER));
reparseBuffer->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
hFile = CreateFileW(linkOrigPath, GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hFile != INVALID_HANDLE_VALUE) {
if (!DeviceIoControl(hFile, FSCTL_DELETE_REPARSE_POINT, reparseBuffer,
REPARSE_MOUNTPOINT_HEADER_SIZE,NULL,0,&returnedLength,NULL)) {
/*
* Error setting junction.
*/
Tcl_WinConvertError(GetLastError());
CloseHandle(hFile);
} else {
CloseHandle(hFile);
if (!linkOnly) {
RemoveDirectoryW(linkOrigPath);
}
return 0;
}
}
return -1;
}
/*
*--------------------------------------------------------------------
*
* WinReadLinkDirectory --
*
* This routine reads a NTFS junction, using the undocumented
* FSCTL_GET_REPARSE_POINT structure Win2K uses for mount points and
* junctions.
*
* Assumption that LinkDirectory is a valid, existing directory.
*
* Returns:
* A Tcl_Obj with refCount of 1 (i.e. owned by the caller), or NULL if
* anything went wrong.
*
* In the future we should enhance this to return a path object rather
* than a string.
*
*--------------------------------------------------------------------
*/
#if defined (__clang__) || ((__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#endif
static Tcl_Obj *
WinReadLinkDirectory(
const WCHAR *linkDirPath)
{
int attr, len, offset;
DUMMY_REPARSE_BUFFER dummy;
REPARSE_DATA_BUFFER *reparseBuffer = (REPARSE_DATA_BUFFER *) &dummy;
Tcl_Obj *retVal;
Tcl_DString ds;
const char *copy;
attr = GetFileAttributesW(linkDirPath);
if (!(attr & FILE_ATTRIBUTE_REPARSE_POINT)) {
goto invalidError;
}
if (NativeReadReparse(linkDirPath, reparseBuffer, 0)) {
return NULL;
}
switch (reparseBuffer->ReparseTag) {
case 0x80000000|IO_REPARSE_TAG_SYMBOLIC_LINK:
case IO_REPARSE_TAG_SYMBOLIC_LINK:
case IO_REPARSE_TAG_MOUNT_POINT:
/*
* Certain native path representations on Windows have a special
* prefix to indicate that they are to be treated specially. For
* example extremely long paths, or symlinks, or volumes mounted
* inside directories.
*
* There is an assumption in this code that 'wide' interfaces are
* being used (see tclWin32Dll.c), which is true for the only systems
* which support reparse tags at present. If that changes in the
* future, this code will have to be generalised.
*/
offset = 0;
if (reparseBuffer->MountPointReparseBuffer.PathBuffer[0] == '\\') {
/*
* Check whether this is a mounted volume.
*/
if (wcsncmp(reparseBuffer->MountPointReparseBuffer.PathBuffer,
L"\\??\\Volume{",11) == 0) {
char drive;
/*
* There is some confusion between \??\ and \\?\ which we have
* to fix here. It doesn't seem very well documented.
*/
reparseBuffer->MountPointReparseBuffer.PathBuffer[1] = '\\';
/*
* Check if a corresponding drive letter exists, and use that
* if it is found
*/
drive = TclWinDriveLetterForVolMountPoint(
reparseBuffer->MountPointReparseBuffer.PathBuffer);
if (drive != -1) {
char driveSpec[3] = {
'\0', ':', '\0'
};
driveSpec[0] = drive;
retVal = Tcl_NewStringObj(driveSpec,2);
Tcl_IncrRefCount(retVal);
return retVal;
}
/*
* This is actually a mounted drive, which doesn't exists as a
* DOS drive letter. This means the path isn't actually a
* link, although we partially treat it like one ('file type'
* will return 'link'), but then the link will actually just
* be treated like an ordinary directory. I don't believe any
* serious inconsistency will arise from this, but it is
* something to be aware of.
*/
goto invalidError;
} else if (wcsncmp(reparseBuffer->MountPointReparseBuffer
.PathBuffer, L"\\\\?\\",4) == 0) {
/*
* Strip off the prefix.
*/
offset = 4;
} else if (wcsncmp(reparseBuffer->MountPointReparseBuffer
.PathBuffer, L"\\??\\",4) == 0) {
/*
* Strip off the prefix.
*/
offset = 4;
}
}
Tcl_DStringInit(&ds);
Tcl_WCharToUtfDString(
reparseBuffer->MountPointReparseBuffer.PathBuffer,
reparseBuffer->MountPointReparseBuffer
.SubstituteNameLength>>1, &ds);
copy = Tcl_DStringValue(&ds)+offset;
len = Tcl_DStringLength(&ds)-offset;
retVal = Tcl_NewStringObj(copy,len);
Tcl_IncrRefCount(retVal);
Tcl_DStringFree(&ds);
return retVal;
}
invalidError:
Tcl_SetErrno(EINVAL);
return NULL;
}
#if defined (__clang__) || ((__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
#pragma GCC diagnostic pop
#endif
/*
*--------------------------------------------------------------------
*
* NativeReadReparse --
*
* Read the junction/reparse information from a given NTFS directory.
*
* Assumption that linkDirPath is a valid, existing directory.
*
* Returns:
* Zero on success.
*
*--------------------------------------------------------------------
*/
static int
NativeReadReparse(
const WCHAR *linkDirPath, /* The junction to read */
REPARSE_DATA_BUFFER *buffer,/* Pointer to buffer. Cannot be NULL */
DWORD desiredAccess)
{
HANDLE hFile;
DWORD returnedLength;
hFile = CreateFileW(linkDirPath, desiredAccess, FILE_SHARE_READ, NULL,
OPEN_EXISTING,
FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
/*
* Error creating directory.
*/
Tcl_WinConvertError(GetLastError());
return -1;
}
/*
* Get the link.
*/
if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT, NULL, 0, buffer,
sizeof(DUMMY_REPARSE_BUFFER), &returnedLength, NULL)) {
/*
* Error setting junction.
*/
Tcl_WinConvertError(GetLastError());
CloseHandle(hFile);
return -1;
}
CloseHandle(hFile);
if (!IsReparseTagValid(buffer->ReparseTag)) {
Tcl_SetErrno(EINVAL);
return -1;
}
return 0;
}
/*
*--------------------------------------------------------------------
*
* NativeWriteReparse --
*
* Write the reparse information for a given directory.
*
* Assumption that LinkDirectory does not exist.
*
*--------------------------------------------------------------------
*/
static int
NativeWriteReparse(
const WCHAR *linkDirPath,
REPARSE_DATA_BUFFER *buffer)
{
HANDLE hFile;
DWORD returnedLength;
/*
* Create the directory - it must not already exist.
*/
if (CreateDirectoryW(linkDirPath, NULL) == 0) {
/*
* Error creating directory.
*/
Tcl_WinConvertError(GetLastError());
return -1;
}
hFile = CreateFileW(linkDirPath, GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT
| FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
/*
* Error creating directory.
*/
Tcl_WinConvertError(GetLastError());
return -1;
}
/*
* Set the link.
*/
if (!DeviceIoControl(hFile, FSCTL_SET_REPARSE_POINT, buffer,
(DWORD) buffer->ReparseDataLength + REPARSE_MOUNTPOINT_HEADER_SIZE,
NULL, 0, &returnedLength, NULL)) {
/*
* Error setting junction.
*/
Tcl_WinConvertError(GetLastError());
CloseHandle(hFile);
RemoveDirectoryW(linkDirPath);
return -1;
}
CloseHandle(hFile);
/*
* We succeeded.
*/
return 0;
}
/*
*----------------------------------------------------------------------
*
* tclWinDebugPanic --
*
* Display a message. If a debugger is present, present it directly to
* the debugger, otherwise use a MessageBox.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
tclWinDebugPanic(
const char *format, ...)
{
#define TCL_MAX_WARN_LEN 1024
va_list argList;
char buf[TCL_MAX_WARN_LEN * 3];
WCHAR msgString[TCL_MAX_WARN_LEN];
va_start(argList, format);
vsnprintf(buf, sizeof(buf), format, argList);
msgString[TCL_MAX_WARN_LEN-1] = '\0';
MultiByteToWideChar(CP_UTF8, 0, buf, -1, msgString, TCL_MAX_WARN_LEN);
/*
* Truncate MessageBox string if it is too long to not overflow the screen
* and cause possible oversized window error.
*/
if (msgString[TCL_MAX_WARN_LEN-1] != '\0') {
memcpy(msgString + (TCL_MAX_WARN_LEN - 5), L" ...", 5 * sizeof(WCHAR));
}
if (IsDebuggerPresent()) {
OutputDebugStringW(msgString);
} else {
MessageBeep(MB_ICONEXCLAMATION);
MessageBoxW(NULL, msgString, L"Fatal Error",
MB_ICONSTOP | MB_OK | MB_TASKMODAL | MB_SETFOREGROUND);
}
}
/*
*---------------------------------------------------------------------------
*
* TclpFindExecutable --
*
* This function computes the absolute path name of the current
* application.
*
* Results:
* None.
*
* Side effects:
* The computed path is stored.
*
*---------------------------------------------------------------------------
*/
void
TclpFindExecutable(
const char *argv0) /* If NULL, install PanicMessageBox, otherwise
* ignore. */
{
WCHAR wName[MAX_PATH];
char name[MAX_PATH * 3];
(void)argv0;
GetModuleFileNameW(NULL, wName, sizeof(wName)/sizeof(WCHAR));
WideCharToMultiByte(CP_UTF8, 0, wName, -1, name, sizeof(name), NULL, NULL);
TclWinNoBackslash(name);
TclSetObjNameOfExecutable(Tcl_NewStringObj(name, TCL_INDEX_NONE), NULL);
}
/*
*----------------------------------------------------------------------
*
* TclpMatchInDirectory --
*
* This routine is used by the globbing code to search a directory for
* all files which match a given pattern.
*
* Results:
* The return value is a standard Tcl result indicating whether an error
* occurred in globbing. Errors are left in interp, good results are
* lappended to resultPtr (which must be a valid object).
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclpMatchInDirectory(
Tcl_Interp *interp, /* Interpreter to receive errors. */
Tcl_Obj *resultPtr, /* List object to lappend results. */
Tcl_Obj *pathPtr, /* Contains path to directory to search. */
const char *pattern, /* Pattern to match against. */
Tcl_GlobTypeData *types) /* Object containing list of acceptable types.
* May be NULL. In particular the directory
* flag is very important. */
{
const WCHAR *native;
if (types != NULL && types->type == TCL_GLOB_TYPE_MOUNT) {
/*
* The native filesystem never adds mounts.
*/
return TCL_OK;
}
if (pattern == NULL || (*pattern == '\0')) {
Tcl_Obj *norm = Tcl_FSGetNormalizedPath(NULL, pathPtr);
if (norm != NULL) {
/*
* Match a single file directly.
*/
DWORD attr;
WIN32_FILE_ATTRIBUTE_DATA data;
Tcl_Size len = 0;
const char *str = TclGetStringFromObj(norm, &len);
native = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
if (GetFileAttributesExW(native,
GetFileExInfoStandard, &data) != TRUE) {
return TCL_OK;
}
attr = data.dwFileAttributes;
if (NativeMatchType(WinIsDrive(str, len), attr, native, types)) {
Tcl_ListObjAppendElement(interp, resultPtr, pathPtr);
}
}
return TCL_OK;
} else {
DWORD attr;
HANDLE handle;
WIN32_FIND_DATAW data;
const char *dirName; /* UTF-8 dir name, later with pattern
* appended. */
Tcl_Size dirLength;
int matchSpecialDots;
Tcl_DString ds; /* Native encoding of dir, also used
* temporarily for other things. */
Tcl_DString dsOrig; /* UTF-8 encoding of dir. */
Tcl_Obj *fileNamePtr;
char lastChar;
/*
* Get the normalized path representation (the main thing is we dont
* want any '~' sequences).
*/
fileNamePtr = Tcl_FSGetNormalizedPath(interp, pathPtr);
if (fileNamePtr == NULL) {
return TCL_ERROR;
}
/*
* Verify that the specified path exists and is actually a directory.
*/
native = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
if (native == NULL) {
return TCL_OK;
}
attr = GetFileAttributesW(native);
if ((attr == INVALID_FILE_ATTRIBUTES)
|| ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0)) {
return TCL_OK;
}
/*
* Build up the directory name for searching, including a trailing
* directory separator.
*/
Tcl_DStringInit(&dsOrig);
dirName = TclGetStringFromObj(fileNamePtr, &dirLength);
Tcl_DStringAppend(&dsOrig, dirName, dirLength);
lastChar = dirName[dirLength -1];
if ((lastChar != '\\') && (lastChar != '/') && (lastChar != ':')) {
TclDStringAppendLiteral(&dsOrig, "/");
dirLength++;
}
dirName = Tcl_DStringValue(&dsOrig);
/*
* We need to check all files in the directory, so we append '*.*' to
* the path, unless the pattern we've been given is rather simple,
* when we can use that instead.
*/
if (strpbrk(pattern, "[]\\") == NULL) {
/*
* The pattern is a simple one containing just '*' and/or '?'.
* This means we can get the OS to help us, by passing it the
* pattern.
*/
dirName = Tcl_DStringAppend(&dsOrig, pattern, TCL_INDEX_NONE);
} else {
dirName = TclDStringAppendLiteral(&dsOrig, "*.*");
}
Tcl_DStringInit(&ds);
native = Tcl_UtfToWCharDString(dirName, TCL_INDEX_NONE, &ds);
if ((types == NULL) || (types->type != TCL_GLOB_TYPE_DIR)) {
handle = FindFirstFileW(native, &data);
} else {
/*
* We can be more efficient, for pure directory requests.
*/
handle = FindFirstFileExW(native,
FindExInfoStandard, &data,
FindExSearchLimitToDirectories, NULL, 0);
}
if (handle == INVALID_HANDLE_VALUE) {
DWORD err = GetLastError();
Tcl_DStringFree(&ds);
if (err == ERROR_FILE_NOT_FOUND) {
/*
* We used our 'pattern' above, and matched nothing. This
* means we just return TCL_OK, indicating no results found.
*/
Tcl_DStringFree(&dsOrig);
return TCL_OK;
}
Tcl_WinConvertError(err);
if (interp != NULL) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"couldn't read directory \"%s\": %s",
Tcl_DStringValue(&dsOrig), Tcl_PosixError(interp)));
}
Tcl_DStringFree(&dsOrig);
return TCL_ERROR;
}
Tcl_DStringFree(&ds);
/*
* We may use this later, so we must restore it to its length
* including the directory delimiter.
*/
Tcl_DStringSetLength(&dsOrig, dirLength);
/*
* Check to see if the pattern should match the special . and
* .. names, referring to the current directory, or the directory
* above. We need a special check for this because paths beginning
* with a dot are not considered hidden on Windows, and so otherwise a
* relative glob like 'glob -join * *' will actually return
* './. ../..' etc.
*/
if ((pattern[0] == '.')
|| ((pattern[0] == '\\') && (pattern[1] == '.'))) {
matchSpecialDots = 1;
} else {
matchSpecialDots = 0;
}
/*
* Now iterate over all of the files in the directory, starting with
* the first one we found.
*/
do {
const char *utfname;
int checkDrive = 0, isDrive;
native = data.cFileName;
attr = data.dwFileAttributes;
Tcl_DStringInit(&ds);
utfname = Tcl_WCharToUtfDString(native, TCL_INDEX_NONE, &ds);
if (!matchSpecialDots) {
/*
* If it is exactly '.' or '..' then we ignore it.
*/
if ((utfname[0] == '.') && (utfname[1] == '\0'
|| (utfname[1] == '.' && utfname[2] == '\0'))) {
Tcl_DStringFree(&ds);
continue;
}
} else if (utfname[0] == '.' && utfname[1] == '.'
&& utfname[2] == '\0') {
/*
* Have to check if this is a drive below, so we can correctly
* match 'hidden' and not hidden files.
*/
checkDrive = 1;
}
/*
* Check to see if the file matches the pattern. Note that we are
* ignoring the case sensitivity flag because Windows doesn't
* honor case even if the volume is case sensitive. If the volume
* also doesn't preserve case, then we previously returned the
* lower case form of the name. This didn't seem quite right since
* there are non-case-preserving volumes that actually return
* mixed case. So now we are returning exactly what we get from
* the system.
*/
if (Tcl_StringCaseMatch(utfname, pattern, 1)) {
/*
* If the file matches, then we need to process the remainder
* of the path.
*/
if (checkDrive) {
const char *fullname = Tcl_DStringAppend(&dsOrig, utfname,
Tcl_DStringLength(&ds));
isDrive = WinIsDrive(fullname, Tcl_DStringLength(&dsOrig));
Tcl_DStringSetLength(&dsOrig, dirLength);
} else {
isDrive = 0;
}
if (NativeMatchType(isDrive, attr, native, types)) {
Tcl_ListObjAppendElement(interp, resultPtr,
TclNewFSPathObj(pathPtr, utfname,
Tcl_DStringLength(&ds)));
}
}
/*
* Free ds here to ensure that native is valid above.
*/
Tcl_DStringFree(&ds);
} while (FindNextFileW(handle, &data) == TRUE);
FindClose(handle);
Tcl_DStringFree(&dsOrig);
return TCL_OK;
}
}
/*
* Does the given path represent a root volume? We need this special case
* because for NTFS root volumes, the getFileAttributesProc returns a 'hidden'
* attribute when it should not.
*/
static int
WinIsDrive(
const char *name, /* Name (UTF-8) */
size_t len) /* Length of name */
{
int remove = 0;
while (len > 4) {
if ((name[len-1] != '.' || name[len-2] != '.')
|| (name[len-3] != '/' && name[len-3] != '\\')) {
/*
* We don't have '/..' at the end.
*/
if (remove == 0) {
break;
}
remove--;
while (len > 0) {
len--;
if (name[len] == '/' || name[len] == '\\') {
break;
}
}
if (len < 4) {
len++;
break;
}
} else {
/*
* We do have '/..'
*/
len -= 3;
remove++;
}
}
if (len < 4) {
if (len == 0) {
/*
* Not sure if this is possible, but we pass it on anyway.
*/
} else if (len == 1 && (name[0] == '/' || name[0] == '\\')) {
/*
* Path is pointing to the root volume.
*/
return 1;
} else if ((name[1] == ':')
&& (len == 2 || (name[2] == '/' || name[2] == '\\'))) {
/*
* Path is of the form 'x:' or 'x:/' or 'x:\'
*/
return 1;
}
}
return 0;
}
/*
* Does the given path represent a reserved window path name? If not return 0,
* if true, return the number of characters of the path that we actually want
* (not any trailing :).
*/
static size_t
WinIsReserved(
const char *path) /* Path in UTF-8 */
{
if ((path[0] == 'c' || path[0] == 'C')
&& (path[1] == 'o' || path[1] == 'O')) {
if ((path[2] == 'm' || path[2] == 'M')
&& path[3] >= '1' && path[3] <= '9') {
/*
* May have match for 'com[1-9]:?', which is a serial port.
*/
if (path[4] == '\0') {
return 4;
} else if (path[4] == ':' && path[5] == '\0') {
return 4;
}
} else if ((path[2] == 'n' || path[2] == 'N') && path[3] == '\0') {
/*
* Have match for 'con'
*/
return 3;
}
} else if ((path[0] == 'l' || path[0] == 'L')
&& (path[1] == 'p' || path[1] == 'P')
&& (path[2] == 't' || path[2] == 'T')) {
if (path[3] >= '1' && path[3] <= '9') {
/*
* May have match for 'lpt[1-9]:?'
*/
if (path[4] == '\0') {
return 4;
} else if (path[4] == ':' && path[5] == '\0') {
return 4;
}
}
} else if (!strcasecmp(path, "prn") || !strcasecmp(path, "nul")
|| !strcasecmp(path, "aux")) {
/*
* Have match for 'prn', 'nul' or 'aux'.
*/
return 3;
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* NativeMatchType --
*
* This function needs a special case for a path which is a root volume,
* because for NTFS root volumes, the getFileAttributesProc returns a
* 'hidden' attribute when it should not.
*
* We never make any calls to a 'get attributes' routine here, since we
* have arranged things so that our caller already knows such
* information.
*
* Results:
* 0 = file doesn't match
* 1 = file matches
*
*----------------------------------------------------------------------
*/
static int
NativeMatchType(
int isDrive, /* Is this a drive. */
DWORD attr, /* We already know the attributes for the
* file. */
const WCHAR *nativeName, /* Native path to check. */
Tcl_GlobTypeData *types) /* Type description to match against. */
{
/*
* 'attr' represents the attributes of the file, but we only want to
* retrieve this info if it is absolutely necessary because it is an
* expensive call. Unfortunately, to deal with hidden files properly, we
* must always retrieve it.
*/
if (types == NULL) {
/*
* If invisible, don't return the file.
*/
return !(attr & FILE_ATTRIBUTE_HIDDEN && !isDrive);
}
if (attr & FILE_ATTRIBUTE_HIDDEN && !isDrive) {
/*
* If invisible.
*/
if ((types->perm == 0) || !(types->perm & TCL_GLOB_PERM_HIDDEN)) {
return 0;
}
} else {
/*
* Visible.
*/
if (types->perm & TCL_GLOB_PERM_HIDDEN) {
return 0;
}
}
if (types->perm != 0) {
if (((types->perm & TCL_GLOB_PERM_RONLY) &&
!(attr & FILE_ATTRIBUTE_READONLY)) ||
((types->perm & TCL_GLOB_PERM_R) &&
(0 /* File exists => R_OK on Windows */)) ||
((types->perm & TCL_GLOB_PERM_W) &&
(attr & FILE_ATTRIBUTE_READONLY)) ||
((types->perm & TCL_GLOB_PERM_X) &&
(!(attr & FILE_ATTRIBUTE_DIRECTORY)
&& !NativeIsExec(nativeName)))) {
return 0;
}
}
if ((types->type & TCL_GLOB_TYPE_DIR)
&& (attr & FILE_ATTRIBUTE_DIRECTORY)) {
/*
* Quicker test for directory, which is a common case.
*/
return 1;
} else if (types->type != 0) {
unsigned short st_mode;
int isExec = NativeIsExec(nativeName);
st_mode = NativeStatMode(attr, 0, isExec);
/*
* In order bcdpfls as in 'find -t'
*/
if (((types->type&TCL_GLOB_TYPE_BLOCK) && S_ISBLK(st_mode)) ||
((types->type&TCL_GLOB_TYPE_CHAR) && S_ISCHR(st_mode)) ||
((types->type&TCL_GLOB_TYPE_DIR) && S_ISDIR(st_mode)) ||
((types->type&TCL_GLOB_TYPE_PIPE) && S_ISFIFO(st_mode)) ||
#ifdef S_ISSOCK
((types->type&TCL_GLOB_TYPE_SOCK) && S_ISSOCK(st_mode)) ||
#endif
((types->type&TCL_GLOB_TYPE_FILE) && S_ISREG(st_mode))) {
/*
* Do nothing - this file is ok.
*/
} else {
#ifdef S_ISLNK
if (types->type & TCL_GLOB_TYPE_LINK) {
st_mode = NativeStatMode(attr, 1, isExec);
if (S_ISLNK(st_mode)) {
return 1;
}
}
#endif /* S_ISLNK */
return 0;
}
}
return 1;
}
/*
*----------------------------------------------------------------------
*
* TclpGetUserHome --
*
* This function takes the passed in user name and finds the
* corresponding home directory specified in the password file.
*
* Results:
* The result is a pointer to a string specifying the user's home
* directory, or NULL if the user's home directory could not be
* determined. Storage for the result string is allocated in bufferPtr;
* the caller must call Tcl_DStringFree() when the result is no longer
* needed.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
const char *
TclpGetUserHome(
const char *name, /* User name for desired home directory. */
Tcl_DString *bufferPtr) /* Uninitialized or free DString filled with
* name of user's home directory. */
{
char *result = NULL;
USER_INFO_1 *uiPtr;
Tcl_DString ds;
int nameLen = -1;
int rc = 0;
const char *domain;
WCHAR *wName, *wHomeDir, *wDomain;
Tcl_DStringInit(bufferPtr);
wDomain = NULL;
domain = Tcl_UtfFindFirst(name, '@');
if (domain == NULL) {
const char *ptr;
/*
* Treat the current user as a special case because the general case
* below does not properly retrieve the path. The NetUserGetInfo
* call returns an empty path and the code defaults to the user's
* name in the profiles directory. On modern Windows systems, this
* is generally wrong as when the account is a Microsoft account,
* for example [email protected], the directory name is
* abcde and not abcdefghi.
*
* Note we could have just used env(USERPROFILE) here but
* the intent is to retrieve (as on Unix) the system's view
* of the home irrespective of environment settings of HOME
* and USERPROFILE.
*
* Fixing this for the general user needs more investigating but
* at least for the current user we can use a direct call.
*/
ptr = TclpGetUserName(&ds);
if (ptr != NULL && strcasecmp(name, ptr) == 0) {
HANDLE hProcess;
WCHAR buf[MAX_PATH];
DWORD nChars = sizeof(buf) / sizeof(buf[0]);
/* Sadly GetCurrentProcessToken not in Win 7 so slightly longer */
hProcess = GetCurrentProcess(); /* Need not be closed */
if (hProcess) {
HANDLE hToken;
if (OpenProcessToken(hProcess, TOKEN_QUERY, &hToken)) {
if (GetUserProfileDirectoryW(hToken, buf, &nChars)) {
result = Tcl_WCharToUtfDString(buf, nChars-1, (bufferPtr));
rc = 1;
}
CloseHandle(hToken);
}
}
}
Tcl_DStringFree(&ds);
} else {
Tcl_DStringInit(&ds);
wName = Tcl_UtfToWCharDString(domain + 1, TCL_INDEX_NONE, &ds);
rc = NetGetDCName(NULL, wName, (LPBYTE *) &wDomain);
Tcl_DStringFree(&ds);
nameLen = domain - name;
}
if (rc == 0) {
Tcl_DStringInit(&ds);
wName = Tcl_UtfToWCharDString(name, nameLen, &ds);
while (NetUserGetInfo(wDomain, wName, 1, (LPBYTE *) &uiPtr) != 0) {
/*
* User does not exist; if domain was not specified, try again
* using current domain.
*/
rc = 1;
if (domain != NULL) {
break;
}
/*
* Get current domain
*/
rc = NetGetDCName(NULL, NULL, (LPBYTE *) &wDomain);
if (rc != 0) {
break;
}
domain = (const char *)INT2PTR(-1); /* repeat once */
}
if (rc == 0) {
DWORD i, size = MAX_PATH;
wHomeDir = uiPtr->usri1_home_dir;
if ((wHomeDir != NULL) && (wHomeDir[0] != '\0')) {
size = lstrlenW(wHomeDir);
Tcl_WCharToUtfDString(wHomeDir, size, bufferPtr);
} else {
WCHAR buf[MAX_PATH];
/*
* User exists but has no home dir. Return
* "{GetProfilesDirectory}/<user>".
*/
GetProfilesDirectoryW(buf, &size);
Tcl_WCharToUtfDString(buf, size-1, bufferPtr);
Tcl_DStringAppend(bufferPtr, "/", 1);
Tcl_DStringAppend(bufferPtr, name, nameLen);
}
result = Tcl_DStringValue(bufferPtr);
/*
* Be sure we return normalized path
*/
for (i = 0; i < size; ++i) {
if (result[i] == '\\') {
result[i] = '/';
}
}
NetApiBufferFree((void *)uiPtr);
}
Tcl_DStringFree(&ds);
}
if (wDomain != NULL) {
NetApiBufferFree((void *)wDomain);
}
return result;
}
/*
*---------------------------------------------------------------------------
*
* NativeAccess --
*
* This function replaces the library version of access(), fixing the
* following bugs:
*
* 1. access() returns that all files have execute permission.
*
* Results:
* See access documentation.
*
* Side effects:
* See access documentation.
*
*---------------------------------------------------------------------------
*/
static int
NativeAccess(
const WCHAR *nativePath, /* Path of file to access, native encoding. */
int mode) /* Permission setting. */
{
DWORD attr;
attr = GetFileAttributesW(nativePath);
if (attr == INVALID_FILE_ATTRIBUTES) {
/*
* File might not exist.
*/
DWORD lasterror = GetLastError();
if (lasterror != ERROR_SHARING_VIOLATION) {
Tcl_WinConvertError(lasterror);
return -1;
}
}
if (mode == F_OK) {
/*
* File exists, nothing else to check.
*/
return 0;
}
/*
* If it's not a directory (assume file), do several fast checks:
*/
if (!(attr & FILE_ATTRIBUTE_DIRECTORY)) {
/*
* If the attributes say this is not writable at all. The file is a
* regular file (i.e., not a directory), then the file is not
* writable, full stop. For directories, the read-only bit is
* (mostly) ignored by Windows, so we can't ascertain anything about
* directory access from the attrib data. However, if we have the
* advanced 'getFileSecurityProc', then more robust ACL checks will be
* done below.
*/
if ((mode & W_OK) && (attr & FILE_ATTRIBUTE_READONLY)) {
Tcl_SetErrno(EACCES);
return -1;
}
/*
* If doesn't have the correct extension, it can't be executable
*/
if ((mode & X_OK) && !NativeIsExec(nativePath)) {
Tcl_SetErrno(EACCES);
return -1;
}
/*
* Special case for read/write/executable check on file
*/
if ((mode & (R_OK|W_OK|X_OK)) && !(mode & ~(R_OK|W_OK|X_OK))) {
DWORD mask = 0;
HANDLE hFile;
if (mode & R_OK) {
mask |= GENERIC_READ;
}
if (mode & W_OK) {
mask |= GENERIC_WRITE;
}
if (mode & X_OK) {
mask |= GENERIC_EXECUTE;
}
hFile = CreateFileW(nativePath, mask,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, FILE_FLAG_NO_BUFFERING, NULL);
if (hFile != INVALID_HANDLE_VALUE) {
CloseHandle(hFile);
return 0;
}
/*
* Fast exit if access was denied
*/
if (GetLastError() == ERROR_ACCESS_DENIED) {
Tcl_SetErrno(EACCES);
return -1;
}
}
/*
* We cannot verify the access fast, check it below using security
* info.
*/
}
/*
* It looks as if the permissions are ok, but if we are on NT, 2000 or XP,
* we have a more complex permissions structure so we try to check that.
* The code below is remarkably complex for such a simple thing as finding
* what permissions the OS has set for a file.
*/
{
SECURITY_DESCRIPTOR *sdPtr = NULL;
unsigned long size;
PSID pSid = 0;
BOOL SidDefaulted;
SID_IDENTIFIER_AUTHORITY samba_unmapped = {{0, 0, 0, 0, 0, 22}};
GENERIC_MAPPING genMap;
HANDLE hToken = NULL;
DWORD desiredAccess = 0, grantedAccess = 0;
BOOL accessYesNo = FALSE;
PRIVILEGE_SET privSet;
DWORD privSetSize = sizeof(PRIVILEGE_SET);
int error;
/*
* First find out how big the buffer needs to be.
*/
size = 0;
GetFileSecurityW(nativePath,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION
| DACL_SECURITY_INFORMATION | LABEL_SECURITY_INFORMATION,
0, 0, &size);
/*
* Should have failed with ERROR_INSUFFICIENT_BUFFER
*/
error = GetLastError();
if (error != ERROR_INSUFFICIENT_BUFFER) {
/*
* Most likely case is ERROR_ACCESS_DENIED, which we will convert
* to EACCES - just what we want!
*/
Tcl_WinConvertError((DWORD) error);
return -1;
}
/*
* Now size contains the size of buffer needed.
*/
sdPtr = (SECURITY_DESCRIPTOR *) HeapAlloc(GetProcessHeap(), 0, size);
if (sdPtr == NULL) {
goto accessError;
}
/*
* Call GetFileSecurityW() for real.
*/
if (!GetFileSecurityW(nativePath,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION
| DACL_SECURITY_INFORMATION | LABEL_SECURITY_INFORMATION,
sdPtr, size, &size)) {
/*
* Error getting owner SD
*/
goto accessError;
}
/*
* As of Samba 3.0.23 (10-Jul-2006), unmapped users and groups are
* assigned to SID domains S-1-22-1 and S-1-22-2, where "22" is the
* top-level authority. If the file owner and group is unmapped then
* the ACL access check below will only test against world access,
* which is likely to be more restrictive than the actual access
* restrictions. Since the ACL tests are more likely wrong than
* right, skip them. Moreover, the unix owner access permissions are
* usually mapped to the Windows attributes, so if the user is the
* file owner then the attrib checks above are correct (as far as they
* go).
*/
if(!GetSecurityDescriptorOwner(sdPtr,&pSid,&SidDefaulted) ||
memcmp(GetSidIdentifierAuthority(pSid),&samba_unmapped,
sizeof(SID_IDENTIFIER_AUTHORITY))==0) {
HeapFree(GetProcessHeap(), 0, sdPtr);
return 0; /* Attrib tests say access allowed. */
}
/*
* Perform security impersonation of the user and open the resulting
* thread token.
*/
if (!ImpersonateSelf(SecurityImpersonation)) {
/*
* Unable to perform security impersonation.
*/
goto accessError;
}
if (!OpenThreadToken(GetCurrentThread(),
TOKEN_DUPLICATE | TOKEN_QUERY, FALSE, &hToken)) {
/*
* Unable to get current thread's token.
*/
goto accessError;
}
RevertToSelf();
/*
* Setup desiredAccess according to the access privileges we are
* checking.
*/
if (mode & R_OK) {
desiredAccess |= FILE_GENERIC_READ;
}
if (mode & W_OK) {
desiredAccess |= FILE_GENERIC_WRITE;
}
if (mode & X_OK) {
desiredAccess |= FILE_GENERIC_EXECUTE;
}
memset(&genMap, 0x0, sizeof(GENERIC_MAPPING));
genMap.GenericRead = FILE_GENERIC_READ;
genMap.GenericWrite = FILE_GENERIC_WRITE;
genMap.GenericExecute = FILE_GENERIC_EXECUTE;
genMap.GenericAll = FILE_ALL_ACCESS;
/*
* Perform access check using the token.
*/
if (!AccessCheck(sdPtr, hToken, desiredAccess,
&genMap, &privSet, &privSetSize, &grantedAccess,
&accessYesNo)) {
/*
* Unable to perform access check.
*/
accessError:
Tcl_WinConvertError(GetLastError());
if (sdPtr != NULL) {
HeapFree(GetProcessHeap(), 0, sdPtr);
}
if (hToken != NULL) {
CloseHandle(hToken);
}
return -1;
}
/*
* Clean up.
*/
HeapFree(GetProcessHeap(), 0, sdPtr);
CloseHandle(hToken);
if (!accessYesNo) {
Tcl_SetErrno(EACCES);
return -1;
}
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* NativeIsExec --
*
* Determines if a path is executable. On windows this is simply defined
* by whether the path ends in a standard executable extension.
*
* Results:
* 1 = executable, 0 = not.
*
*----------------------------------------------------------------------
*/
static int
NativeIsExec(
const WCHAR *path)
{
int len = wcslen(path);
if (len < 5) {
return 0;
}
if (path[len-4] != '.') {
return 0;
}
path += len-3;
if ((_wcsicmp(path, L"exe") == 0)
|| (_wcsicmp(path, L"com") == 0)
|| (_wcsicmp(path, L"cmd") == 0)
|| (_wcsicmp(path, L"bat") == 0)) {
return 1;
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* TclpObjChdir --
*
* This function replaces the library version of chdir().
*
* Results:
* See chdir() documentation.
*
* Side effects:
* See chdir() documentation.
*
*----------------------------------------------------------------------
*/
int
TclpObjChdir(
Tcl_Obj *pathPtr) /* Path to new working directory. */
{
int result;
const WCHAR *nativePath;
nativePath = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
if (!nativePath) {
return -1;
}
result = SetCurrentDirectoryW(nativePath);
if (result == 0) {
Tcl_WinConvertError(GetLastError());
return -1;
}
return 0;
}
/*
*----------------------------------------------------------------------
*
* TclpGetCwd --
*
* This function replaces the library version of getcwd(). (Obsolete
* function, only retained for old extensions which may call it
* directly).
*
* Results:
* The result is a pointer to a string specifying the current directory,
* or NULL if the current directory could not be determined. If NULL is
* returned, an error message is left in the interp's result. Storage for
* the result string is allocated in bufferPtr; the caller must call
* Tcl_DStringFree() when the result is no longer needed.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
const char *
TclpGetCwd(
Tcl_Interp *interp, /* If non-NULL, used for error reporting. */
Tcl_DString *bufferPtr) /* Uninitialized or free DString filled with
* name of current directory. */
{
WCHAR buffer[MAX_PATH];
char *p;
WCHAR *native;
if (GetCurrentDirectoryW(MAX_PATH, buffer) == 0) {
Tcl_WinConvertError(GetLastError());
if (interp != NULL) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"error getting working directory name: %s",
Tcl_PosixError(interp)));
}
return NULL;
}
/*
* Watch for the weird Windows c:\\UNC syntax.
*/
native = (WCHAR *) buffer;
if ((native[0] != '\0') && (native[1] == ':')
&& (native[2] == '\\') && (native[3] == '\\')) {
native += 2;
}
Tcl_DStringInit(bufferPtr);
Tcl_WCharToUtfDString(native, TCL_INDEX_NONE, bufferPtr);
/*
* Convert to forward slashes for easier use in scripts.
*/
for (p = Tcl_DStringValue(bufferPtr); *p != '\0'; p++) {
if (*p == '\\') {
*p = '/';
}
}
return Tcl_DStringValue(bufferPtr);
}
int
TclpObjStat(
Tcl_Obj *pathPtr, /* Path of file to stat. */
Tcl_StatBuf *statPtr) /* Filled with results of stat call. */
{
/*
* Ensure correct file sizes by forcing the OS to write any pending data
* to disk. This is done only for channels which are dirty, i.e. have been
* written to since the last flush here.
*/
TclWinFlushDirtyChannels();
return NativeStat((const WCHAR *)Tcl_FSGetNativePath(pathPtr), statPtr, 0);
}
/*
*----------------------------------------------------------------------
*
* NativeStat --
*
* This function replaces the library version of stat(), fixing the
* following bugs:
*
* 1. stat("c:") returns an error.
* 2. Borland stat() return time in GMT instead of localtime.
* 3. stat("\\server\mount") would return error.
* 4. Accepts slashes or backslashes.
* 5. st_dev and st_rdev were wrong for UNC paths.
*
* Results:
* See stat documentation.
*
* Side effects:
* See stat documentation.
*
*----------------------------------------------------------------------
*/
static int
NativeStat(
const WCHAR *nativePath, /* Path of file to stat */
Tcl_StatBuf *statPtr, /* Filled with results of stat call. */
int checkLinks) /* If non-zero, behave like 'lstat' */
{
DWORD attr;
int dev, nlink = 1;
unsigned short mode;
unsigned int inode = 0;
HANDLE fileHandle;
DWORD fileType = FILE_TYPE_UNKNOWN;
/*
* If we can use 'createFile' on this, then we can use the resulting
* fileHandle to read more information (nlink, ino) than we can get from
* other attributes reading APIs. If not, then we try to fall back on the
* 'getFileAttributesExProc', and if that isn't available, then on even
* simpler routines.
*
* Special consideration must be given to Windows hard-coded names like
* CON, NULL, COM1, LPT1 etc. For these, we still need to do the
* CreateFile as some may not exist (e.g. there is no CON in wish by
* default). However the subsequent GetFileInformationByHandle will
* fail. We do a WinIsReserved to see if it is one of the special names,
* and if successful, mock up a BY_HANDLE_FILE_INFORMATION structure.
*/
fileHandle = CreateFileW(nativePath, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
if (fileHandle != INVALID_HANDLE_VALUE) {
BY_HANDLE_FILE_INFORMATION data;
if (GetFileInformationByHandle(fileHandle,&data) != TRUE) {
fileType = GetFileType(fileHandle);
CloseHandle(fileHandle);
if (fileType != FILE_TYPE_CHAR && fileType != FILE_TYPE_DISK) {
Tcl_SetErrno(ENOENT);
return -1;
}
/*
* Mock up the expected structure
*/
memset(&data, 0, sizeof(data));
statPtr->st_atime = 0;
statPtr->st_mtime = 0;
statPtr->st_ctime = 0;
} else {
CloseHandle(fileHandle);
statPtr->st_atime = ToCTime(data.ftLastAccessTime);
statPtr->st_mtime = ToCTime(data.ftLastWriteTime);
statPtr->st_ctime = ToCTime(data.ftCreationTime);
}
attr = data.dwFileAttributes;
statPtr->st_size = ((long long) data.nFileSizeLow) |
(((long long) data.nFileSizeHigh) << 32);
/*
* On Unix, for directories, nlink apparently depends on the number of
* files in the directory. We could calculate that, but it would be a
* bit of a performance penalty, I think. Hence we just use what
* Windows gives us, which is the same as Unix for files, at least.
*/
nlink = data.nNumberOfLinks;
/*
* Unfortunately our stat definition's inode field (unsigned short)
* will throw away most of the precision we have here, which means we
* can't rely on inode as a unique identifier of a file. We'd really
* like to do something like how we handle 'st_size'.
*/
inode = data.nFileIndexHigh | data.nFileIndexLow;
} else {
/*
* Fall back on the less capable routines. This means no nlink or ino.
*/
WIN32_FILE_ATTRIBUTE_DATA data;
if (GetFileAttributesExW(nativePath,
GetFileExInfoStandard, &data) != TRUE) {
HANDLE hFind;
WIN32_FIND_DATAW ffd;
DWORD lasterror = GetLastError();
if (lasterror != ERROR_SHARING_VIOLATION) {
Tcl_WinConvertError(lasterror);
return -1;
}
hFind = FindFirstFileW(nativePath, &ffd);
if (hFind == INVALID_HANDLE_VALUE) {
Tcl_WinConvertError(GetLastError());
return -1;
}
memcpy(&data, &ffd, sizeof(data));
FindClose(hFind);
}
attr = data.dwFileAttributes;
statPtr->st_size = ((long long) data.nFileSizeLow) |
(((long long) data.nFileSizeHigh) << 32);
statPtr->st_atime = ToCTime(data.ftLastAccessTime);
statPtr->st_mtime = ToCTime(data.ftLastWriteTime);
statPtr->st_ctime = ToCTime(data.ftCreationTime);
}
dev = NativeDev(nativePath);
mode = NativeStatMode(attr, checkLinks, NativeIsExec(nativePath));
if (fileType == FILE_TYPE_CHAR) {
mode &= ~S_IFMT;
mode |= S_IFCHR;
} else if (fileType == FILE_TYPE_DISK) {
mode &= ~S_IFMT;
mode |= S_IFBLK;
}
statPtr->st_dev = (dev_t) dev;
statPtr->st_ino = inode;
statPtr->st_mode = mode;
statPtr->st_nlink = nlink;
statPtr->st_uid = 0;
statPtr->st_gid = 0;
statPtr->st_rdev = (dev_t) dev;
return 0;
}
/*
*----------------------------------------------------------------------
*
* NativeDev --
*
* Calculate just the 'st_dev' field of a 'stat' structure.
*
*----------------------------------------------------------------------
*/
static int
NativeDev(
const WCHAR *nativePath) /* Full path of file to stat */
{
int dev;
Tcl_DString ds;
WCHAR nativeFullPath[MAX_PATH];
WCHAR *nativePart;
const char *fullPath;
GetFullPathNameW(nativePath, MAX_PATH, nativeFullPath, &nativePart);
Tcl_DStringInit(&ds);
fullPath = Tcl_WCharToUtfDString(nativeFullPath, TCL_INDEX_NONE, &ds);
if ((fullPath[0] == '\\') && (fullPath[1] == '\\')) {
const char *p;
DWORD dw;
const WCHAR *nativeVol;
Tcl_DString volString;
p = strchr(fullPath + 2, '\\');
p = strchr(p + 1, '\\');
if (p == NULL) {
/*
* Add terminating backslash to fullpath or GetVolumeInformationW()
* won't work.
*/
fullPath = TclDStringAppendLiteral(&ds, "\\");
p = fullPath + Tcl_DStringLength(&ds);
} else {
p++;
}
Tcl_DStringInit(&volString);
nativeVol = Tcl_UtfToWCharDString(fullPath, p - fullPath, &volString);
dw = (DWORD) -1;
GetVolumeInformationW(nativeVol, NULL, 0, &dw, NULL, NULL, NULL, 0);
/*
* GetFullPathNameW() turns special devices like "NUL" into "\\.\NUL",
* but GetVolumeInformationW() returns failure for "\\.\NUL". This will
* cause "NUL" to get a drive number of -1, which makes about as much
* sense as anything since the special devices don't live on any
* drive.
*/
dev = dw;
Tcl_DStringFree(&volString);
} else if ((fullPath[0] != '\0') && (fullPath[1] == ':')) {
dev = Tcl_UniCharToLower(fullPath[0]) - 'a';
} else {
dev = -1;
}
Tcl_DStringFree(&ds);
return dev;
}
/*
*----------------------------------------------------------------------
*
* NativeStatMode --
*
* Calculate just the 'st_mode' field of a 'stat' structure.
*
* In many places we don't need the full stat structure, and it's much
* faster just to calculate these pieces, if that's all we need.
*
*----------------------------------------------------------------------
*/
static unsigned short
NativeStatMode(
DWORD attr,
int checkLinks,
int isExec)
{
int mode;
if (checkLinks && (attr & FILE_ATTRIBUTE_REPARSE_POINT)) {
/*
* It is a link.
*/
mode = S_IFLNK;
} else {
mode = (attr & FILE_ATTRIBUTE_DIRECTORY) ? S_IFDIR|S_IEXEC : S_IFREG;
}
mode |= (attr & FILE_ATTRIBUTE_READONLY) ? S_IREAD : S_IREAD|S_IWRITE;
if (isExec) {
mode |= S_IEXEC;
}
/*
* Propagate the S_IREAD, S_IWRITE, S_IEXEC bits to the group and other
* positions.
*/
mode |= (mode & (S_IREAD|S_IWRITE|S_IEXEC)) >> 3;
mode |= (mode & (S_IREAD|S_IWRITE|S_IEXEC)) >> 6;
return (unsigned short) mode;
}
/*
*------------------------------------------------------------------------
*
* ToCTime --
*
* Converts a Windows FILETIME to a __time64_t in UTC.
*
* Results:
* Returns the count of seconds from the Posix epoch.
*
*------------------------------------------------------------------------
*/
static __time64_t
ToCTime(
FILETIME fileTime) /* UTC time */
{
LARGE_INTEGER convertedTime;
convertedTime.LowPart = fileTime.dwLowDateTime;
convertedTime.HighPart = (LONG) fileTime.dwHighDateTime;
return (__time64_t) ((convertedTime.QuadPart -
(long long) POSIX_EPOCH_AS_FILETIME) / (long long) 10000000);
}
/*
*------------------------------------------------------------------------
*
* FromCTime --
*
* Converts a __time64_t to a Windows FILETIME
*
* Results:
* Returns the count of 100-ns ticks seconds from the Windows epoch.
*
*------------------------------------------------------------------------
*/
static void
FromCTime(
__time64_t posixTime,
FILETIME *fileTime) /* UTC Time */
{
LARGE_INTEGER convertedTime;
convertedTime.QuadPart = ((LONGLONG) posixTime) * 10000000
+ POSIX_EPOCH_AS_FILETIME;
fileTime->dwLowDateTime = convertedTime.LowPart;
fileTime->dwHighDateTime = convertedTime.HighPart;
}
/*
*---------------------------------------------------------------------------
*
* TclpGetNativeCwd --
*
* This function replaces the library version of getcwd().
*
* Results:
* The input and output are filesystem paths in native form. The result
* is either the given clientData, if the working directory hasn't
* changed, or a new clientData (owned by our caller), giving the new
* native path, or NULL if the current directory could not be determined.
* If NULL is returned, the caller can examine the standard Posix error
* codes to determine the cause of the problem.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void *
TclpGetNativeCwd(
void *clientData)
{
WCHAR buffer[MAX_PATH];
if (GetCurrentDirectoryW(MAX_PATH, buffer) == 0) {
Tcl_WinConvertError(GetLastError());
return NULL;
}
if (clientData != NULL) {
if (wcscmp((const WCHAR *) clientData, buffer) == 0) {
return clientData;
}
}
return TclNativeDupInternalRep(buffer);
}
int
TclpObjAccess(
Tcl_Obj *pathPtr,
int mode)
{
return NativeAccess((const WCHAR *)Tcl_FSGetNativePath(pathPtr), mode);
}
int
TclpObjLstat(
Tcl_Obj *pathPtr,
Tcl_StatBuf *statPtr)
{
/*
* Ensure correct file sizes by forcing the OS to write any pending data
* to disk. This is done only for channels which are dirty, i.e. have been
* written to since the last flush here.
*/
TclWinFlushDirtyChannels();
return NativeStat((const WCHAR *)Tcl_FSGetNativePath(pathPtr), statPtr, 1);
}
#ifdef S_IFLNK
Tcl_Obj *
TclpObjLink(
Tcl_Obj *pathPtr,
Tcl_Obj *toPtr,
int linkAction)
{
if (toPtr != NULL) {
int res;
const WCHAR *LinkTarget;
const WCHAR *LinkSource = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
Tcl_Obj *normalizedToPtr = Tcl_FSGetNormalizedPath(NULL, toPtr);
if (normalizedToPtr == NULL) {
return NULL;
}
LinkTarget = (const WCHAR *)Tcl_FSGetNativePath(normalizedToPtr);
if (LinkSource == NULL || LinkTarget == NULL) {
return NULL;
}
res = WinLink(LinkSource, LinkTarget, linkAction);
if (res == 0) {
return toPtr;
} else {
return NULL;
}
} else {
const WCHAR *LinkSource = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
if (LinkSource == NULL) {
return NULL;
}
return WinReadLink(LinkSource);
}
}
#endif /* S_IFLNK */
/*
*---------------------------------------------------------------------------
*
* TclpFilesystemPathType --
*
* This function is part of the native filesystem support, and returns
* the path type of the given path. Returns NTFS or FAT or whatever is
* returned by the 'volume information' proc.
*
* Results:
* NULL at present.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
Tcl_Obj *
TclpFilesystemPathType(
Tcl_Obj *pathPtr)
{
#define VOL_BUF_SIZE 32
int found;
WCHAR volType[VOL_BUF_SIZE];
char *firstSeparator;
const char *path;
Tcl_Obj *normPath = Tcl_FSGetNormalizedPath(NULL, pathPtr);
if (normPath == NULL) {
return NULL;
}
path = TclGetString(normPath);
if (path == NULL) {
return NULL;
}
firstSeparator = strchr((char *)path, '/');
if (firstSeparator == NULL) {
found = GetVolumeInformationW((const WCHAR *)Tcl_FSGetNativePath(pathPtr),
NULL, 0, NULL, NULL, NULL, volType, VOL_BUF_SIZE);
} else {
Tcl_Obj *driveName = Tcl_NewStringObj(path, firstSeparator - path+1);
Tcl_IncrRefCount(driveName);
found = GetVolumeInformationW((const WCHAR *)Tcl_FSGetNativePath(driveName),
NULL, 0, NULL, NULL, NULL, volType, VOL_BUF_SIZE);
Tcl_DecrRefCount(driveName);
}
if (found == 0) {
return NULL;
} else {
Tcl_DString ds;
Tcl_DStringInit(&ds);
Tcl_WCharToUtfDString(volType, TCL_INDEX_NONE, &ds);
return Tcl_DStringToObj(&ds);
}
#undef VOL_BUF_SIZE
}
/*
* This define can be turned on to experiment with a different way of
* normalizing paths (using a different Windows API). Unfortunately the new
* path seems to take almost exactly the same amount of time as the old path!
* The primary time taken by normalization is in
* GetFileAttributesEx/FindFirstFile or GetFileAttributesEx/GetLongPathName.
* Conversion to/from native is not a significant factor at all.
*
* Also, since we have to check for symbolic links (reparse points) then we
* have to call GetFileAttributes on each path segment anyway, so there's no
* benefit to doing anything clever there.
*/
/* #define TclNORM_LONG_PATH */
/*
*---------------------------------------------------------------------------
*
* TclpObjNormalizePath --
*
* This function scans through a path specification and replaces it, in
* place, with a normalized version. This means using the 'longname', and
* expanding any symbolic links contained within the path.
*
* Results:
* The new 'nextCheckpoint' value, giving as far as we could understand
* in the path.
*
* Side effects:
* The pathPtr string, which must contain a valid path, is possibly
* modified in place.
*
*---------------------------------------------------------------------------
*/
int
TclpObjNormalizePath(
TCL_UNUSED(Tcl_Interp *),
Tcl_Obj *pathPtr, /* An unshared object containing the path to
* normalize */
int nextCheckpoint) /* offset to start at in pathPtr */
{
char *lastValidPathEnd = NULL;
Tcl_DString dsNorm; /* This will hold the normalized string. */
char *path, *currentPathEndPosition;
Tcl_Obj *temp = NULL;
int isDrive = 1;
Tcl_DString ds; /* Some workspace. */
Tcl_DStringInit(&dsNorm);
path = TclGetString(pathPtr);
currentPathEndPosition = path + nextCheckpoint;
if (*currentPathEndPosition == '/') {
currentPathEndPosition++;
}
while (1) {
char cur = *currentPathEndPosition;
if ((cur=='/' || cur==0) && (path != currentPathEndPosition)) {
/*
* Reached directory separator, or end of string.
*/
WIN32_FILE_ATTRIBUTE_DATA data;
const WCHAR *nativePath;
Tcl_DStringInit(&ds);
nativePath = Tcl_UtfToWCharDString(path,
currentPathEndPosition - path, &ds);
if (GetFileAttributesExW(nativePath,
GetFileExInfoStandard, &data) != TRUE) {
/*
* File doesn't exist.
*/
if (isDrive) {
size_t len = WinIsReserved(path);
if (len > 0) {
/*
* Actually it does exist - COM1, etc.
*/
size_t i;
for (i=0 ; i<len ; i++) {
WCHAR wc = ((WCHAR *)nativePath)[i];
if (wc >= 'a') {
wc -= ('a' - 'A');
((WCHAR *) nativePath)[i] = wc;
}
}
Tcl_DStringAppend(&dsNorm,
(const char *)nativePath,
sizeof(WCHAR) * len);
lastValidPathEnd = currentPathEndPosition;
} else if (nextCheckpoint == 0) {
/*
* Path starts with a drive designation that's not
* actually on the system. We still must normalize up
* past the first separator. [Bug 3603434]
*/
currentPathEndPosition++;
}
}
Tcl_DStringFree(&ds);
break;
}
/*
* File 'nativePath' does exist if we get here. We now want to
* check if it is a symlink and otherwise continue with the
* rest of the path.
*/
/*
* Check for symlinks, except at last component of path (we don't
* follow final symlinks). Also a drive (C:/) for example, may
* sometimes have the reparse flag set for some reason I don't
* understand. We therefore don't perform this check for drives.
*/
if (cur != 0 && !isDrive &&
data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT){
Tcl_Obj *to = WinReadLinkDirectory(nativePath);
if (to != NULL) {
/*
* Read the reparse point ok. Now, reparse points need not
* be normalized, otherwise we could use:
*
* Tcl_GetStringFromObj(to, &pathLen);
* nextCheckpoint = pathLen;
*
* So, instead we have to start from the beginning.
*/
nextCheckpoint = 0;
Tcl_AppendToObj(to, currentPathEndPosition, TCL_INDEX_NONE);
/*
* Convert link to forward slashes.
*/
for (path = TclGetString(to); *path != 0; path++) {
if (*path == '\\') {
*path = '/';
}
}
path = TclGetString(to);
currentPathEndPosition = path + nextCheckpoint;
if (temp != NULL) {
Tcl_DecrRefCount(temp);
}
temp = to;
/*
* Reset variables so we can restart normalization.
*/
isDrive = 1;
Tcl_DStringFree(&dsNorm);
Tcl_DStringFree(&ds);
continue;
}
}
#ifndef TclNORM_LONG_PATH
/*
* Now we convert the tail of the current path to its 'long form',
* and append it to 'dsNorm' which holds the current normalized
* path
*/
if (isDrive) {
WCHAR drive = ((WCHAR *) nativePath)[0];
if (drive >= 'a') {
drive -= ('a' - 'A');
((WCHAR *) nativePath)[0] = drive;
}
Tcl_DStringAppend(&dsNorm, (const char *)nativePath,
Tcl_DStringLength(&ds));
} else {
char *checkDots = NULL;
if (lastValidPathEnd[1] == '.') {
checkDots = lastValidPathEnd + 1;
while (checkDots < currentPathEndPosition) {
if (*checkDots != '.') {
checkDots = NULL;
break;
}
checkDots++;
}
}
if (checkDots != NULL) {
int dotLen = currentPathEndPosition-lastValidPathEnd;
/*
* Path is just dots. We shouldn't really ever see a path
* like that. However, to be nice we at least don't mangle
* the path - we just add the dots as a path segment and
* continue.
*/
Tcl_DStringAppend(&dsNorm, ((const char *)nativePath)
+ Tcl_DStringLength(&ds)
- (dotLen * sizeof(WCHAR)),
dotLen * sizeof(WCHAR));
} else {
/*
* Normal path.
*/
WIN32_FIND_DATAW fData;
HANDLE handle;
handle = FindFirstFileW((WCHAR *) nativePath, &fData);
if (handle == INVALID_HANDLE_VALUE) {
/*
* This is usually the '/' in 'c:/' at end of string.
*/
Tcl_DStringAppend(&dsNorm, (const char *) L"/",
sizeof(WCHAR));
} else {
WCHAR *nativeName;
if (fData.cFileName[0] != '\0') {
nativeName = fData.cFileName;
} else {
nativeName = fData.cAlternateFileName;
}
FindClose(handle);
Tcl_DStringAppend(&dsNorm, (const char *) L"/",
sizeof(WCHAR));
Tcl_DStringAppend(&dsNorm,
(const char *) nativeName,
wcslen(nativeName)*sizeof(WCHAR));
}
}
}
#endif /* !TclNORM_LONG_PATH */
Tcl_DStringFree(&ds);
lastValidPathEnd = currentPathEndPosition;
if (cur == 0) {
break;
}
/*
* If we get here, we've got past one directory delimiter, so we
* know it is no longer a drive.
*/
isDrive = 0;
}
currentPathEndPosition++;
#ifdef TclNORM_LONG_PATH
/*
* Convert the entire known path to long form.
*/
WCHAR wpath[MAX_PATH];
const WCHAR *nativePath;
DWORD wpathlen;
Tcl_DStringInit(&ds);
nativePath =
Tcl_UtfToWCharDString(path, lastValidPathEnd - path, &ds);
wpathlen = GetLongPathNameProc(nativePath,
(WCHAR *) wpath, MAX_PATH);
/*
* We have to make the drive letter uppercase.
*/
if (wpath[0] >= 'a') {
wpath[0] -= ('a' - 'A');
}
Tcl_DStringAppend(&dsNorm, (const char *) wpath,
wpathlen * sizeof(WCHAR));
Tcl_DStringFree(&ds);
#endif /* TclNORM_LONG_PATH */
}
/*
* Common code path for all Windows platforms.
*/
nextCheckpoint = currentPathEndPosition - path;
if (lastValidPathEnd != NULL) {
/*
* Concatenate the normalized string in dsNorm with the tail of the
* path which we didn't recognise. The string in dsNorm is in the
* native encoding, so we have to convert it to Utf.
*/
Tcl_DStringInit(&ds);
Tcl_WCharToUtfDString((const WCHAR *) Tcl_DStringValue(&dsNorm),
Tcl_DStringLength(&dsNorm)>>1, &ds);
nextCheckpoint = Tcl_DStringLength(&ds);
if (*lastValidPathEnd != 0) {
/*
* Not the end of the string.
*/
Tcl_Obj *tmpPathPtr;
Tcl_Size len;
tmpPathPtr = Tcl_NewStringObj(Tcl_DStringValue(&ds),
nextCheckpoint);
Tcl_AppendToObj(tmpPathPtr, lastValidPathEnd, TCL_INDEX_NONE);
path = TclGetStringFromObj(tmpPathPtr, &len);
Tcl_SetStringObj(pathPtr, path, len);
Tcl_DecrRefCount(tmpPathPtr);
} else {
/*
* End of string was reached above.
*/
Tcl_SetStringObj(pathPtr, Tcl_DStringValue(&ds), nextCheckpoint);
}
Tcl_DStringFree(&ds);
}
Tcl_DStringFree(&dsNorm);
/*
* This must be done after we are totally finished with 'path' as we are
* sharing the same underlying string.
*/
if (temp != NULL) {
Tcl_DecrRefCount(temp);
}
return nextCheckpoint;
}
/*
*---------------------------------------------------------------------------
*
* TclWinVolumeRelativeNormalize --
*
* Only Windows has volume-relative paths. These paths are rather rare,
* but it is nice if Tcl can handle them. It is much better if we can
* handle them here, rather than in the native fs code, because we really
* need to have a real absolute path just below.
*
* We do not let this block compile on non-Windows platforms because the
* test suite's manual forcing of tclPlatform can otherwise cause this
* code path to be executed, causing various errors because
* volume-relative paths really do not exist.
*
* Results:
* A valid normalized path.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
Tcl_Obj *
TclWinVolumeRelativeNormalize(
Tcl_Interp *interp,
const char *path,
Tcl_Obj **useThisCwdPtr)
{
Tcl_Obj *absolutePath, *useThisCwd;
useThisCwd = Tcl_FSGetCwd(interp);
if (useThisCwd == NULL) {
return NULL;
}
if (path[0] == '/') {
/*
* Path of form /foo/bar which is a path in the root directory of the
* current volume.
*/
const char *drive = TclGetString(useThisCwd);
absolutePath = Tcl_NewStringObj(drive,2);
Tcl_AppendToObj(absolutePath, path, TCL_INDEX_NONE);
Tcl_IncrRefCount(absolutePath);
/*
* We have a refCount on the cwd.
*/
} else {
/*
* Path of form C:foo/bar, but this only makes sense if the cwd is
* also on drive C.
*/
Tcl_Size cwdLen;
const char *drive = TclGetStringFromObj(useThisCwd, &cwdLen);
char drive_cur = path[0];
if (drive_cur >= 'a') {
drive_cur -= ('a' - 'A');
}
if (drive[0] == drive_cur) {
absolutePath = Tcl_DuplicateObj(useThisCwd);
/*
* We have a refCount on the cwd, which we will release later.
*/
if (drive[cwdLen-1] != '/' && (path[2] != '\0')) {
/*
* Only add a trailing '/' if needed, which is if there isn't
* one already, and if we are going to be adding some more
* characters.
*/
Tcl_AppendToObj(absolutePath, "/", 1);
}
} else {
Tcl_DecrRefCount(useThisCwd);
useThisCwd = NULL;
/*
* The path is not in the current drive, but is volume-relative.
* The way Tcl 8.3 handles this is that it treats such a path as
* relative to the root of the drive. We therefore behave the same
* here. This behaviour is, however, different to that of the
* windows command-line. If we want to fix this at some point in
* the future (at the expense of a behaviour change to Tcl), we
* could use the '_dgetdcwd' Win32 API to get the drive's cwd.
*/
absolutePath = Tcl_NewStringObj(path, 2);
Tcl_AppendToObj(absolutePath, "/", 1);
}
Tcl_IncrRefCount(absolutePath);
Tcl_AppendToObj(absolutePath, path+2, TCL_INDEX_NONE);
}
*useThisCwdPtr = useThisCwd;
return absolutePath;
}
/*
*---------------------------------------------------------------------------
*
* TclpNativeToNormalized --
*
* Convert native format to a normalized path object, with refCount of
* zero.
*
* Currently assumes all native paths are actually normalized already, so
* if the path given is not normalized this will actually just convert to
* a valid string path, but not necessarily a normalized one.
*
* Results:
* A valid normalized path.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
Tcl_Obj *
TclpNativeToNormalized(
void *clientData)
{
Tcl_DString ds;
Tcl_Obj *objPtr;
size_t len;
char *copy, *p;
Tcl_DStringInit(&ds);
Tcl_WCharToUtfDString((const WCHAR *) clientData, TCL_INDEX_NONE, &ds);
copy = Tcl_DStringValue(&ds);
len = Tcl_DStringLength(&ds);
/*
* Certain native path representations on Windows have this special prefix
* to indicate that they are to be treated specially. For example
* extremely long paths, or symlinks.
*/
if (*copy == '\\') {
if (0 == strncmp(copy,"\\??\\",4)) {
copy += 4;
len -= 4;
} else if (0 == strncmp(copy,"\\\\?\\",4)) {
copy += 4;
len -= 4;
}
}
/*
* Ensure we are using forward slashes only.
*/
for (p = copy; *p != '\0'; p++) {
if (*p == '\\') {
*p = '/';
}
}
objPtr = Tcl_NewStringObj(copy,len);
Tcl_DStringFree(&ds);
return objPtr;
}
/*
*---------------------------------------------------------------------------
*
* TclNativeCreateNativeRep --
*
* Create a native representation for the given path.
*
* Results:
* The nativePath representation.
*
* Side effects:
* Memory will be allocated. The path might be normalized.
*
*---------------------------------------------------------------------------
*/
void *
TclNativeCreateNativeRep(
Tcl_Obj *pathPtr)
{
WCHAR *nativePathPtr = NULL;
const char *str;
Tcl_Obj *validPathPtr;
Tcl_Size len;
WCHAR *wp;
if (TclFSCwdIsNative()) {
/*
* The cwd is native, which means we can use the translated path
* without worrying about normalization (this will also usually be
* shorter so the utf-to-external conversion will be somewhat faster).
*/
validPathPtr = Tcl_FSGetTranslatedPath(NULL, pathPtr);
if (validPathPtr == NULL) {
return NULL;
}
/*
* refCount of validPathPtr was already incremented in
* Tcl_FSGetTranslatedPath
*/
} else {
/*
* Make sure the normalized path is set.
*/
validPathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
if (validPathPtr == NULL) {
return NULL;
}
/*
* validPathPtr returned from Tcl_FSGetNormalizedPath is owned by Tcl,
* so incr refCount here
*/
Tcl_IncrRefCount(validPathPtr);
}
str = TclGetStringFromObj(validPathPtr, &len);
if (strlen(str) != (size_t)len) {
/*
* String contains NUL-bytes. This is invalid.
*/
goto done;
}
/*
* For a reserved device, strip a possible postfix ':'
*/
len = WinIsReserved(str);
if (len == 0) {
/*
* Let MultiByteToWideChar check for other invalid sequences, like
* 0xC0 0x80 (== overlong NUL). See bug [3118489]: NUL in filenames
*/
len = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str, -1, 0, 0);
if (len==0) {
goto done;
}
}
/*
* Overallocate 6 chars, making some room for extended paths
*/
wp = nativePathPtr = (WCHAR *)Tcl_Alloc((len + 6) * sizeof(WCHAR));
if (nativePathPtr==0) {
goto done;
}
MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str, -1, nativePathPtr,
len + 2);
nativePathPtr[len] = 0;
/*
* If path starts with "//?/" or "\\?\" (extended path), translate any
* slashes to backslashes but leave the '?' intact
*/
if ((str[0] == '\\' || str[0] == '/') && (str[1] == '\\' || str[1] == '/')
&& str[2] == '?' && (str[3] == '\\' || str[3] == '/')) {
wp[0] = wp[1] = wp[3] = '\\';
str += 4;
wp += 4;
}
/*
* If there is no "\\?\" prefix but there is a drive or UNC path prefix
* and the path is larger than MAX_PATH chars, no Win32 API function can
* handle that unless it is prefixed with the extended path prefix. See:
* <https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#maxpath>
*/
if (((str[0] >= 'A' && str[0] <= 'Z') || (str[0] >= 'a' && str[0] <= 'z'))
&& str[1] == ':') {
if (wp == nativePathPtr && len > MAX_PATH
&& (str[2] == '\\' || str[2] == '/')) {
memmove(wp + 4, wp, len * sizeof(WCHAR));
memcpy(wp, L"\\\\?\\", 4 * sizeof(WCHAR));
wp += 4;
}
/*
* If (remainder of) path starts with "<drive>:", leave the ':'
* intact.
*/
wp += 2;
} else if (wp == nativePathPtr && len > MAX_PATH
&& (str[0] == '\\' || str[0] == '/')
&& (str[1] == '\\' || str[1] == '/') && str[2] != '?') {
memmove(wp + 6, wp, len * sizeof(WCHAR));
memcpy(wp, L"\\\\?\\UNC", 7 * sizeof(WCHAR));
wp += 7;
}
/*
* In the remainder of the path, translate invalid characters to
* characters in the Unicode private use area.
*/
while (*wp != '\0') {
if ((*wp < ' ') || wcschr(L"\"*:<>?|", *wp)) {
*wp |= 0xF000;
} else if (*wp == '/') {
*wp = '\\';
}
++wp;
}
done:
TclDecrRefCount(validPathPtr);
return nativePathPtr;
}
/*
*---------------------------------------------------------------------------
*
* TclNativeDupInternalRep --
*
* Duplicate the native representation.
*
* Results:
* The copied native representation, or NULL if it is not possible to
* copy the representation.
*
* Side effects:
* Memory allocation for the copy.
*
*---------------------------------------------------------------------------
*/
void *
TclNativeDupInternalRep(
void *clientData)
{
char *copy;
size_t len;
if (clientData == NULL) {
return NULL;
}
len = sizeof(WCHAR) * (wcslen((const WCHAR *) clientData) + 1);
copy = (char *)Tcl_Alloc(len);
memcpy(copy, clientData, len);
return copy;
}
/*
*---------------------------------------------------------------------------
*
* TclpUtime --
*
* Set the modification date for a file.
*
* Results:
* 0 on success, -1 on error.
*
* Side effects:
* Sets errno to a representation of any Windows problem that's observed
* in the process.
*
*---------------------------------------------------------------------------
*/
int
TclpUtime(
Tcl_Obj *pathPtr, /* File to modify */
struct utimbuf *tval) /* New modification date structure */
{
int res = 0;
HANDLE fileHandle;
const WCHAR *native;
DWORD attr = 0;
DWORD flags = FILE_ATTRIBUTE_NORMAL;
FILETIME lastAccessTime, lastModTime;
FromCTime(tval->actime, &lastAccessTime);
FromCTime(tval->modtime, &lastModTime);
native = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
attr = GetFileAttributesW(native);
if (attr != INVALID_FILE_ATTRIBUTES && attr & FILE_ATTRIBUTE_DIRECTORY) {
flags = FILE_FLAG_BACKUP_SEMANTICS;
}
/*
* We use the native APIs (not 'utime') because there are some daylight
* savings complications that utime gets wrong.
*/
fileHandle = CreateFileW(native, FILE_WRITE_ATTRIBUTES, 0, NULL,
OPEN_EXISTING, flags, NULL);
if (fileHandle == INVALID_HANDLE_VALUE ||
!SetFileTime(fileHandle, NULL, &lastAccessTime, &lastModTime)) {
Tcl_WinConvertError(GetLastError());
res = -1;
}
if (fileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(fileHandle);
}
return res;
}
/*
*---------------------------------------------------------------------------
*
* TclWinFileOwned --
*
* Returns 1 if the specified file exists and is owned by the current
* user and 0 otherwise. Like the Unix case, the check is made using
* the real process SID, not the effective (impersonation) one.
*
*---------------------------------------------------------------------------
*/
int
TclWinFileOwned(
Tcl_Obj *pathPtr) /* File whose ownership is to be checked */
{
const WCHAR *native;
PSID ownerSid = NULL;
PSECURITY_DESCRIPTOR secd = NULL;
HANDLE token;
LPBYTE buf = NULL;
DWORD bufsz;
int owned = 0;
native = (const WCHAR *)Tcl_FSGetNativePath(pathPtr);
if (GetNamedSecurityInfoW((LPWSTR) native, SE_FILE_OBJECT,
OWNER_SECURITY_INFORMATION, &ownerSid, NULL, NULL, NULL,
&secd) != ERROR_SUCCESS) {
/*
* Either not a file, or we do not have access to it in which case we
* are in all likelihood not the owner.
*/
return 0;
}
/*
* Getting the current process SID is a multi-step process. We make the
* assumption that if a call fails, this process is so underprivileged it
* could not possibly own anything. Normally a process can *always* look
* up its own token.
*/
if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token)) {
/*
* Find out how big the buffer needs to be.
*/
bufsz = 0;
GetTokenInformation(token, TokenUser, NULL, 0, &bufsz);
if (bufsz) {
buf = (LPBYTE)Tcl_Alloc(bufsz);
if (GetTokenInformation(token, TokenUser, buf, bufsz, &bufsz)) {
owned = EqualSid(ownerSid, ((PTOKEN_USER) buf)->User.Sid);
}
}
CloseHandle(token);
}
/*
* Free allocations and be done.
*/
if (secd) {
LocalFree(secd); /* Also frees ownerSid */
}
if (buf) {
Tcl_Free(buf);
}
return (owned != 0); /* Convert non-0 to 1 */
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
Home
Timeline
Branches
Tags
Tickets
Download
Wiki