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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/ArrayUtils.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/TextUtils.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/Utf8.h"
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "nsLocalFile.h"
#include "nsLocalFileCommon.h"
#include "nsIDirectoryEnumerator.h"
#include "nsNativeCharsetUtils.h"
#include "nsSimpleEnumerator.h"
#include "prio.h"
#include "private/pprio.h" // To get PR_ImportFile
#include "nsHashKeys.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include <direct.h>
#include <windows.h>
#include <shlwapi.h>
#include <aclapi.h>
#include "shellapi.h"
#include "shlguid.h"
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <mbstring.h>
#include "prproces.h"
#include "prlink.h"
#include "mozilla/FilePreferences.h"
#include "mozilla/Mutex.h"
#include "SpecialSystemDirectory.h"
#include "nsTraceRefcnt.h"
#include "nsXPCOMCIDInternal.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "nsIWindowMediator.h"
#include "mozIDOMWindow.h"
#include "nsPIDOMWindow.h"
#include "nsIWidget.h"
#include "mozilla/ShellHeaderOnlyUtils.h"
#include "mozilla/WidgetUtils.h"
#include "WinUtils.h"
using namespace mozilla;
using mozilla::FilePreferences::kDevicePathSpecifier;
using mozilla::FilePreferences::kPathSeparator;
#define CHECK_mWorkingPath() \
do { \
if (mWorkingPath.IsEmpty()) return NS_ERROR_NOT_INITIALIZED; \
} while (0)
// CopyFileEx only supports unbuffered I/O in Windows Vista and above
#ifndef COPY_FILE_NO_BUFFERING
# define COPY_FILE_NO_BUFFERING 0x00001000
#endif
#ifndef FILE_ATTRIBUTE_NOT_CONTENT_INDEXED
# define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED 0x00002000
#endif
#ifndef DRIVE_REMOTE
# define DRIVE_REMOTE 4
#endif
// MinGW does not know about this error, ensure we do.
#ifndef ERROR_DEVICE_HARDWARE_ERROR
# define ERROR_DEVICE_HARDWARE_ERROR 483L
#endif
namespace {
nsresult NewLocalFile(const nsAString& aPath, bool aUseDOSDevicePathSyntax,
nsIFile** aResult) {
RefPtr<nsLocalFile> file = new nsLocalFile();
file->SetUseDOSDevicePathSyntax(aUseDOSDevicePathSyntax);
if (!aPath.IsEmpty()) {
nsresult rv = file->InitWithPath(aPath);
if (NS_FAILED(rv)) {
return rv;
}
}
file.forget(aResult);
return NS_OK;
}
} // anonymous namespace
static HWND GetMostRecentNavigatorHWND() {
nsresult rv;
nsCOMPtr<nsIWindowMediator> winMediator(
do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv));
if (NS_FAILED(rv)) {
return nullptr;
}
nsCOMPtr<mozIDOMWindowProxy> navWin;
rv = winMediator->GetMostRecentWindow(u"navigator:browser",
getter_AddRefs(navWin));
if (NS_FAILED(rv) || !navWin) {
return nullptr;
}
nsPIDOMWindowOuter* win = nsPIDOMWindowOuter::From(navWin);
nsCOMPtr<nsIWidget> widget = widget::WidgetUtils::DOMWindowToWidget(win);
if (!widget) {
return nullptr;
}
return reinterpret_cast<HWND>(widget->GetNativeData(NS_NATIVE_WINDOW));
}
nsresult nsLocalFile::RevealFile(const nsString& aResolvedPath) {
MOZ_ASSERT(!NS_IsMainThread(), "Don't run on the main thread");
DWORD attributes = GetFileAttributesW(aResolvedPath.get());
if (INVALID_FILE_ATTRIBUTES == attributes) {
return NS_ERROR_FILE_INVALID_PATH;
}
HRESULT hr;
if (attributes & FILE_ATTRIBUTE_DIRECTORY) {
// We have a directory so we should open the directory itself.
LPITEMIDLIST dir = ILCreateFromPathW(aResolvedPath.get());
if (!dir) {
return NS_ERROR_FAILURE;
}
LPCITEMIDLIST selection[] = {dir};
UINT count = ArrayLength(selection);
// Perform the open of the directory.
hr = SHOpenFolderAndSelectItems(dir, count, selection, 0);
CoTaskMemFree(dir);
} else {
int32_t len = aResolvedPath.Length();
// We don't currently handle UNC long paths of the form \\?\ anywhere so
// this should be fine.
if (len > MAX_PATH) {
return NS_ERROR_FILE_INVALID_PATH;
}
WCHAR parentDirectoryPath[MAX_PATH + 1] = {0};
wcsncpy(parentDirectoryPath, aResolvedPath.get(), MAX_PATH);
PathRemoveFileSpecW(parentDirectoryPath);
// We have a file so we should open the parent directory.
LPITEMIDLIST dir = ILCreateFromPathW(parentDirectoryPath);
if (!dir) {
return NS_ERROR_FAILURE;
}
// Set the item in the directory to select to the file we want to reveal.
LPITEMIDLIST item = ILCreateFromPathW(aResolvedPath.get());
if (!item) {
CoTaskMemFree(dir);
return NS_ERROR_FAILURE;
}
LPCITEMIDLIST selection[] = {item};
UINT count = ArrayLength(selection);
// Perform the selection of the file.
hr = SHOpenFolderAndSelectItems(dir, count, selection, 0);
CoTaskMemFree(dir);
CoTaskMemFree(item);
}
return SUCCEEDED(hr) ? NS_OK : NS_ERROR_FAILURE;
}
class nsDriveEnumerator : public nsSimpleEnumerator,
public nsIDirectoryEnumerator {
public:
explicit nsDriveEnumerator(bool aUseDOSDevicePathSyntax);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSISIMPLEENUMERATOR
NS_FORWARD_NSISIMPLEENUMERATORBASE(nsSimpleEnumerator::)
nsresult Init();
const nsID& DefaultInterface() override { return NS_GET_IID(nsIFile); }
NS_IMETHOD GetNextFile(nsIFile** aResult) override {
bool hasMore = false;
nsresult rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv) || !hasMore) {
return rv;
}
nsCOMPtr<nsISupports> next;
rv = GetNext(getter_AddRefs(next));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> result = do_QueryInterface(next);
result.forget(aResult);
return NS_OK;
}
NS_IMETHOD Close() override { return NS_OK; }
private:
virtual ~nsDriveEnumerator();
/* mDrives stores the null-separated drive names.
* Init sets them.
* HasMoreElements checks mStartOfCurrentDrive.
* GetNext advances mStartOfCurrentDrive.
*/
nsString mDrives;
nsAString::const_iterator mStartOfCurrentDrive;
nsAString::const_iterator mEndOfDrivesString;
const bool mUseDOSDevicePathSyntax;
};
//-----------------------------------------------------------------------------
// static helper functions
//-----------------------------------------------------------------------------
/**
* While not comprehensive, this will map many common Windows error codes to a
* corresponding nsresult. If an unmapped error is encountered, the hex error
* code will be logged to stderr. Error codes, names, and descriptions can be
* found at the following MSDN page:
*
* \note When adding more mappings here, it must be checked if there's code that
* depends on the current generic NS_ERROR_MODULE_WIN32 mapping for such error
* codes.
*/
static nsresult ConvertWinError(DWORD aWinErr) {
nsresult rv;
switch (aWinErr) {
case ERROR_FILE_NOT_FOUND:
[[fallthrough]]; // to NS_ERROR_FILE_NOT_FOUND
case ERROR_PATH_NOT_FOUND:
[[fallthrough]]; // to NS_ERROR_FILE_NOT_FOUND
case ERROR_INVALID_DRIVE:
[[fallthrough]]; // to NS_ERROR_FILE_NOT_FOUND
case ERROR_NOT_READY:
rv = NS_ERROR_FILE_NOT_FOUND;
break;
case ERROR_ACCESS_DENIED:
[[fallthrough]]; // to NS_ERROR_FILE_ACCESS_DENIED
case ERROR_NOT_SAME_DEVICE:
rv = NS_ERROR_FILE_ACCESS_DENIED;
break;
case ERROR_SHARING_VIOLATION: // CreateFile without sharing flags
[[fallthrough]]; // to NS_ERROR_FILE_IS_LOCKED
case ERROR_LOCK_VIOLATION: // LockFile, LockFileEx
rv = NS_ERROR_FILE_IS_LOCKED;
break;
case ERROR_NOT_ENOUGH_MEMORY:
[[fallthrough]]; // to NS_ERROR_OUT_OF_MEMORY
case ERROR_INVALID_BLOCK:
[[fallthrough]]; // to NS_ERROR_OUT_OF_MEMORY
case ERROR_INVALID_HANDLE:
[[fallthrough]]; // to NS_ERROR_OUT_OF_MEMORY
case ERROR_ARENA_TRASHED:
rv = NS_ERROR_OUT_OF_MEMORY;
break;
case ERROR_DIR_NOT_EMPTY:
[[fallthrough]]; // to NS_ERROR_FILE_DIR_NOT_EMPTY
case ERROR_CURRENT_DIRECTORY:
rv = NS_ERROR_FILE_DIR_NOT_EMPTY;
break;
case ERROR_WRITE_PROTECT:
rv = NS_ERROR_FILE_READ_ONLY;
break;
case ERROR_HANDLE_DISK_FULL:
[[fallthrough]]; // to NS_ERROR_FILE_NO_DEVICE_SPACE
case ERROR_DISK_FULL:
rv = NS_ERROR_FILE_NO_DEVICE_SPACE;
break;
case ERROR_FILE_EXISTS:
[[fallthrough]]; // to NS_ERROR_FILE_ALREADY_EXISTS
case ERROR_ALREADY_EXISTS:
[[fallthrough]]; // to NS_ERROR_FILE_ALREADY_EXISTS
case ERROR_CANNOT_MAKE:
rv = NS_ERROR_FILE_ALREADY_EXISTS;
break;
case ERROR_FILENAME_EXCED_RANGE:
rv = NS_ERROR_FILE_NAME_TOO_LONG;
break;
case ERROR_DIRECTORY:
rv = NS_ERROR_FILE_NOT_DIRECTORY;
break;
case ERROR_FILE_CORRUPT:
rv = NS_ERROR_FILE_FS_CORRUPTED;
break;
case ERROR_DEVICE_HARDWARE_ERROR:
[[fallthrough]]; // to NS_ERROR_FILE_DEVICE_FAILURE
case ERROR_DEVICE_NOT_CONNECTED:
[[fallthrough]]; // to NS_ERROR_FILE_DEVICE_FAILURE
case ERROR_IO_DEVICE:
rv = NS_ERROR_FILE_DEVICE_FAILURE;
break;
case 0:
rv = NS_OK;
break;
default:
printf_stderr(
"ConvertWinError received an unrecognized WinError: 0x%" PRIx32 "\n",
static_cast<uint32_t>(aWinErr));
MOZ_ASSERT((aWinErr & 0xFFFF) == aWinErr);
rv = NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_WIN32, aWinErr & 0xFFFF);
break;
}
return rv;
}
// as suggested in the MSDN documentation on SetFilePointer
static __int64 MyFileSeek64(HANDLE aHandle, __int64 aDistance,
DWORD aMoveMethod) {
LARGE_INTEGER li;
li.QuadPart = aDistance;
li.LowPart = SetFilePointer(aHandle, li.LowPart, &li.HighPart, aMoveMethod);
if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
li.QuadPart = -1;
}
return li.QuadPart;
}
// Check whether a path is a volume root. Expects paths to be \-terminated.
static bool IsRootPath(const nsAString& aPath) {
// Easy cases first:
if (aPath.Last() != L'\\') {
return false;
}
if (StringEndsWith(aPath, u":\\"_ns)) {
return true;
}
nsAString::const_iterator begin, end;
aPath.BeginReading(begin);
aPath.EndReading(end);
// We know we've got a trailing slash, skip that:
end--;
// Find the next last slash:
if (RFindInReadable(u"\\"_ns, begin, end)) {
// Reset iterator:
aPath.EndReading(end);
end--;
auto lastSegment = Substring(++begin, end);
if (lastSegment.IsEmpty()) {
return false;
}
// Check if we end with e.g. "c$", a drive letter in UNC or network shares
if (lastSegment.Last() == L'$' && lastSegment.Length() == 2 &&
IsAsciiAlpha(lastSegment.First())) {
return true;
}
// Volume GUID paths:
if (StringBeginsWith(lastSegment, u"Volume{"_ns) &&
lastSegment.Last() == L'}') {
return true;
}
}
return false;
}
static auto kSpecialNTFSFilesInRoot = {
u"$MFT"_ns, u"$MFTMirr"_ns, u"$LogFile"_ns, u"$Volume"_ns,
u"$AttrDef"_ns, u"$Bitmap"_ns, u"$Boot"_ns, u"$BadClus"_ns,
u"$Secure"_ns, u"$UpCase"_ns, u"$Extend"_ns};
static bool IsSpecialNTFSPath(const nsAString& aFilePath) {
nsAString::const_iterator begin, end;
aFilePath.BeginReading(begin);
aFilePath.EndReading(end);
auto iter = begin;
// Early exit if there's no '$' (common case)
if (!FindCharInReadable(L'$', iter, end)) {
return false;
}
iter = begin;
// Any use of ':$' is illegal in filenames anyway; while we support some
// ADS stuff (ie ":Zone.Identifier"), none of them use the ':$' syntax:
if (FindInReadable(u":$"_ns, iter, end)) {
return true;
}
auto normalized = mozilla::MakeUniqueFallible<wchar_t[]>(MAX_PATH);
if (!normalized) {
return true;
}
auto flatPath = PromiseFlatString(aFilePath);
auto fullPathRV =
GetFullPathNameW(flatPath.get(), MAX_PATH - 1, normalized.get(), nullptr);
if (fullPathRV == 0 || fullPathRV > MAX_PATH - 1) {
return false;
}
nsString normalizedPath(normalized.get());
normalizedPath.BeginReading(begin);
normalizedPath.EndReading(end);
iter = begin;
auto kDelimiters = u"\\:"_ns;
while (iter != end && FindCharInReadable(L'$', iter, end)) {
for (auto str : kSpecialNTFSFilesInRoot) {
if (StringBeginsWith(Substring(iter, end), str,
nsCaseInsensitiveStringComparator)) {
// If we're enclosed by separators or the beginning/end of the string,
// this is one of the special files. Check if we're on a volume root.
auto iterCopy = iter;
iterCopy.advance(str.Length());
// We check for both \ and : here because the filename could be
// followd by a colon and a stream name/type, which shouldn't affect
// our check:
if (iterCopy == end || kDelimiters.Contains(*iterCopy)) {
iterCopy = iter;
// At the start of this path component, we don't need to care about
// colons: we would have caught those in the check for `:$` above.
if (iterCopy == begin || *(--iterCopy) == L'\\') {
return IsRootPath(Substring(begin, iter));
}
}
}
}
iter++;
}
return false;
}
//-----------------------------------------------------------------------------
// We need the following three definitions to make |OpenFile| convert a file
// handle to an NSPR file descriptor correctly when |O_APPEND| flag is
// specified. It is defined in a private header of NSPR (primpl.h) we can't
// include. As a temporary workaround until we decide how to extend
// |PR_ImportFile|, we define it here. Currently, |_PR_HAVE_PEEK_BUFFER|
// and |PR_STRICT_ADDR_LEN| are not defined for the 'w95'-dependent portion
// of NSPR so that fields of |PRFilePrivate| #ifdef'd by them are not copied.
// Similarly, |_MDFileDesc| is taken from nsprpub/pr/include/md/_win95.h.
// In an unlikely case we switch to 'NT'-dependent NSPR AND this temporary
// workaround last beyond the switch, |PRFilePrivate| and |_MDFileDesc|
// need to be changed to match the definitions for WinNT.
//-----------------------------------------------------------------------------
typedef enum {
_PR_TRI_TRUE = 1,
_PR_TRI_FALSE = 0,
_PR_TRI_UNKNOWN = -1
} _PRTriStateBool;
struct _MDFileDesc {
PROsfd osfd;
};
struct PRFilePrivate {
int32_t state;
bool nonblocking;
_PRTriStateBool inheritable;
PRFileDesc* next;
int lockCount; /* 0: not locked
* -1: a native lockfile call is in progress
* > 0: # times the file is locked */
bool appendMode;
_MDFileDesc md;
};
//-----------------------------------------------------------------------------
// Six static methods defined below (OpenFile, FileTimeToPRTime, GetFileInfo,
// OpenDir, CloseDir, ReadDir) should go away once the corresponding
// UTF-16 APIs are implemented on all the supported platforms (or at least
// Windows 9x/ME) in NSPR. Currently, they're only implemented on
// Windows NT4 or later. (bug 330665)
//-----------------------------------------------------------------------------
// copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} :
// PR_Open and _PR_MD_OPEN
nsresult OpenFile(const nsString& aName, int aOsflags, int aMode,
bool aShareDelete, PRFileDesc** aFd) {
int32_t access = 0;
int32_t shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
int32_t disposition = 0;
int32_t attributes = 0;
if (aShareDelete) {
shareMode |= FILE_SHARE_DELETE;
}
if (aOsflags & PR_SYNC) {
attributes = FILE_FLAG_WRITE_THROUGH;
}
if (aOsflags & PR_RDONLY || aOsflags & PR_RDWR) {
access |= GENERIC_READ;
}
if (aOsflags & PR_WRONLY || aOsflags & PR_RDWR) {
access |= GENERIC_WRITE;
}
if (aOsflags & PR_CREATE_FILE && aOsflags & PR_EXCL) {
disposition = CREATE_NEW;
} else if (aOsflags & PR_CREATE_FILE) {
if (aOsflags & PR_TRUNCATE) {
disposition = CREATE_ALWAYS;
} else {
disposition = OPEN_ALWAYS;
}
} else {
if (aOsflags & PR_TRUNCATE) {
disposition = TRUNCATE_EXISTING;
} else {
disposition = OPEN_EXISTING;
}
}
if (aOsflags & nsIFile::DELETE_ON_CLOSE) {
attributes |= FILE_FLAG_DELETE_ON_CLOSE;
}
if (aOsflags & nsIFile::OS_READAHEAD) {
attributes |= FILE_FLAG_SEQUENTIAL_SCAN;
}
// If no write permissions are requested, and if we are possibly creating
// the file, then set the new file as read only.
// The flag has no effect if we happen to open the file.
if (!(aMode & (PR_IWUSR | PR_IWGRP | PR_IWOTH)) &&
disposition != OPEN_EXISTING) {
attributes |= FILE_ATTRIBUTE_READONLY;
}
HANDLE file = ::CreateFileW(aName.get(), access, shareMode, nullptr,
disposition, attributes, nullptr);
if (file == INVALID_HANDLE_VALUE) {
*aFd = nullptr;
return ConvertWinError(GetLastError());
}
*aFd = PR_ImportFile((PROsfd)file);
if (*aFd) {
// On Windows, _PR_HAVE_O_APPEND is not defined so that we have to
// add it manually. (see |PR_Open| in nsprpub/pr/src/io/prfile.c)
(*aFd)->secret->appendMode = (PR_APPEND & aOsflags) ? true : false;
return NS_OK;
}
nsresult rv = NS_ErrorAccordingToNSPR();
CloseHandle(file);
return rv;
}
// copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} :
// PR_FileTimeToPRTime and _PR_FileTimeToPRTime
static void FileTimeToPRTime(const FILETIME* aFiletime, PRTime* aPrtm) {
#ifdef __GNUC__
const PRTime _pr_filetime_offset = 116444736000000000LL;
#else
const PRTime _pr_filetime_offset = 116444736000000000i64;
#endif
MOZ_ASSERT(sizeof(FILETIME) == sizeof(PRTime));
::CopyMemory(aPrtm, aFiletime, sizeof(PRTime));
#ifdef __GNUC__
*aPrtm = (*aPrtm - _pr_filetime_offset) / 10LL;
#else
*aPrtm = (*aPrtm - _pr_filetime_offset) / 10i64;
#endif
}
// copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} with some
// changes : PR_GetFileInfo64, _PR_MD_GETFILEINFO64
static nsresult GetFileInfo(const nsString& aName, PRFileInfo64* aInfo) {
if (aName.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
// Checking u"?*" for the file path excluding the kDevicePathSpecifier.
// ToDo: Check if checking "?" for the file path is still needed.
const int32_t offset = StringBeginsWith(aName, kDevicePathSpecifier)
? kDevicePathSpecifier.Length()
: 0;
if (aName.FindCharInSet(u"?*", offset) != kNotFound) {
return NS_ERROR_INVALID_ARG;
}
WIN32_FILE_ATTRIBUTE_DATA fileData;
if (!::GetFileAttributesExW(aName.get(), GetFileExInfoStandard, &fileData)) {
return ConvertWinError(GetLastError());
}
if (fileData.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
aInfo->type = PR_FILE_OTHER;
} else if (fileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
aInfo->type = PR_FILE_DIRECTORY;
} else {
aInfo->type = PR_FILE_FILE;
}
aInfo->size = fileData.nFileSizeHigh;
aInfo->size = (aInfo->size << 32) + fileData.nFileSizeLow;
FileTimeToPRTime(&fileData.ftLastWriteTime, &aInfo->modifyTime);
if (0 == fileData.ftCreationTime.dwLowDateTime &&
0 == fileData.ftCreationTime.dwHighDateTime) {
aInfo->creationTime = aInfo->modifyTime;
} else {
FileTimeToPRTime(&fileData.ftCreationTime, &aInfo->creationTime);
}
return NS_OK;
}
struct nsDir {
HANDLE handle;
WIN32_FIND_DATAW data;
bool firstEntry;
};
static nsresult OpenDir(const nsString& aName, nsDir** aDir) {
if (NS_WARN_IF(!aDir)) {
return NS_ERROR_INVALID_ARG;
}
*aDir = nullptr;
nsDir* d = new nsDir();
nsAutoString filename(aName);
// If |aName| ends in a slash or backslash, do not append another backslash.
if (filename.Last() == L'/' || filename.Last() == L'\\') {
filename.Append('*');
} else {
filename.AppendLiteral("\\*");
}
filename.ReplaceChar(L'/', L'\\');
// FindFirstFileW Will have a last error of ERROR_DIRECTORY if
// <file_path>\* is passed in. If <unknown_path>\* is passed in then
// ERROR_PATH_NOT_FOUND will be the last error.
d->handle = ::FindFirstFileW(filename.get(), &(d->data));
if (d->handle == INVALID_HANDLE_VALUE) {
delete d;
return ConvertWinError(GetLastError());
}
d->firstEntry = true;
*aDir = d;
return NS_OK;
}
static nsresult ReadDir(nsDir* aDir, PRDirFlags aFlags, nsString& aName) {
aName.Truncate();
if (NS_WARN_IF(!aDir)) {
return NS_ERROR_INVALID_ARG;
}
while (1) {
BOOL rv;
if (aDir->firstEntry) {
aDir->firstEntry = false;
rv = 1;
} else {
rv = ::FindNextFileW(aDir->handle, &(aDir->data));
}
if (rv == 0) {
break;
}
const wchar_t* fileName;
fileName = (aDir)->data.cFileName;
if ((aFlags & PR_SKIP_DOT) && (fileName[0] == L'.') &&
(fileName[1] == L'\0')) {
continue;
}
if ((aFlags & PR_SKIP_DOT_DOT) && (fileName[0] == L'.') &&
(fileName[1] == L'.') && (fileName[2] == L'\0')) {
continue;
}
DWORD attrib = aDir->data.dwFileAttributes;
if ((aFlags & PR_SKIP_HIDDEN) && (attrib & FILE_ATTRIBUTE_HIDDEN)) {
continue;
}
aName = fileName;
return NS_OK;
}
DWORD err = GetLastError();
return err == ERROR_NO_MORE_FILES ? NS_OK : ConvertWinError(err);
}
static nsresult CloseDir(nsDir*& aDir) {
if (NS_WARN_IF(!aDir)) {
return NS_ERROR_INVALID_ARG;
}
BOOL isOk = FindClose(aDir->handle);
delete aDir;
aDir = nullptr;
return isOk ? NS_OK : ConvertWinError(GetLastError());
}
//-----------------------------------------------------------------------------
// nsDirEnumerator
//-----------------------------------------------------------------------------
class nsDirEnumerator final : public nsSimpleEnumerator,
public nsIDirectoryEnumerator {
private:
~nsDirEnumerator() { Close(); }
public:
NS_DECL_ISUPPORTS_INHERITED
NS_FORWARD_NSISIMPLEENUMERATORBASE(nsSimpleEnumerator::)
nsDirEnumerator() : mDir(nullptr) {}
const nsID& DefaultInterface() override { return NS_GET_IID(nsIFile); }
nsresult Init(nsIFile* aParent) {
nsAutoString filepath;
aParent->GetTarget(filepath);
if (filepath.IsEmpty()) {
aParent->GetPath(filepath);
}
if (filepath.IsEmpty()) {
return NS_ERROR_UNEXPECTED;
}
// IsDirectory is not needed here because OpenDir will return
// NS_ERROR_FILE_NOT_DIRECTORY if the passed in path is a file.
nsresult rv = OpenDir(filepath, &mDir);
if (NS_FAILED(rv)) {
return rv;
}
mParent = aParent;
return NS_OK;
}
NS_IMETHOD HasMoreElements(bool* aResult) override {
nsresult rv;
if (!mNext && mDir) {
nsString name;
rv = ReadDir(mDir, PR_SKIP_BOTH, name);
if (NS_FAILED(rv)) {
return rv;
}
if (name.IsEmpty()) {
// end of dir entries
rv = CloseDir(mDir);
if (NS_FAILED(rv)) {
return rv;
}
*aResult = false;
return NS_OK;
}
nsCOMPtr<nsIFile> file;
rv = mParent->Clone(getter_AddRefs(file));
if (NS_FAILED(rv)) {
return rv;
}
rv = file->Append(name);
if (NS_FAILED(rv)) {
return rv;
}
mNext = file.forget();
}
*aResult = mNext != nullptr;
if (!*aResult) {
Close();
}
return NS_OK;
}
NS_IMETHOD GetNext(nsISupports** aResult) override {
nsresult rv;
bool hasMore;
rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv)) {
return rv;
}
if (!hasMore) {
return NS_ERROR_FAILURE;
}
mNext.forget(aResult);
return NS_OK;
}
NS_IMETHOD GetNextFile(nsIFile** aResult) override {
*aResult = nullptr;
bool hasMore = false;
nsresult rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv) || !hasMore) {
return rv;
}
mNext.forget(aResult);
return NS_OK;
}
NS_IMETHOD Close() override {
if (mDir) {
nsresult rv = CloseDir(mDir);
NS_ASSERTION(NS_SUCCEEDED(rv), "close failed");
if (NS_FAILED(rv)) {
return NS_ERROR_FAILURE;
}
}
return NS_OK;
}
protected:
nsDir* mDir;
nsCOMPtr<nsIFile> mParent;
nsCOMPtr<nsIFile> mNext;
};
NS_IMPL_ISUPPORTS_INHERITED(nsDirEnumerator, nsSimpleEnumerator,
nsIDirectoryEnumerator)
//-----------------------------------------------------------------------------
// nsLocalFile <public>
//-----------------------------------------------------------------------------
nsLocalFile::nsLocalFile()
: mDirty(true), mResolveDirty(true), mUseDOSDevicePathSyntax(false) {}
nsLocalFile::nsLocalFile(const nsAString& aFilePath)
: mUseDOSDevicePathSyntax(false) {
InitWithPath(aFilePath);
}
nsresult nsLocalFile::nsLocalFileConstructor(nsISupports* aOuter,
const nsIID& aIID,
void** aInstancePtr) {
if (NS_WARN_IF(!aInstancePtr)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(aOuter)) {
return NS_ERROR_NO_AGGREGATION;
}
nsLocalFile* inst = new nsLocalFile();
nsresult rv = inst->QueryInterface(aIID, aInstancePtr);
if (NS_FAILED(rv)) {
delete inst;
return rv;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsLocalFile::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(nsLocalFile, nsIFile, nsILocalFileWin)
//-----------------------------------------------------------------------------
// nsLocalFile <private>
//-----------------------------------------------------------------------------
nsLocalFile::nsLocalFile(const nsLocalFile& aOther)
: mDirty(true),
mResolveDirty(true),
mUseDOSDevicePathSyntax(aOther.mUseDOSDevicePathSyntax),
mWorkingPath(aOther.mWorkingPath) {}
nsresult nsLocalFile::ResolveSymlink() {
std::wstring workingPath(mWorkingPath.Data());
if (!widget::WinUtils::ResolveJunctionPointsAndSymLinks(workingPath)) {
return NS_ERROR_FAILURE;
}
mResolvedPath.Assign(workingPath.c_str(), workingPath.length());
return NS_OK;
}
// Resolve any shortcuts and stat the resolved path. After a successful return
// the path is guaranteed valid and the members of mFileInfo64 can be used.
nsresult nsLocalFile::ResolveAndStat() {
// if we aren't dirty then we are already done
if (!mDirty) {
return NS_OK;
}
AUTO_PROFILER_LABEL("nsLocalFile::ResolveAndStat", OTHER);
// we can't resolve/stat anything that isn't a valid NSPR addressable path
if (mWorkingPath.IsEmpty()) {
return NS_ERROR_FILE_INVALID_PATH;
}
// this is usually correct
mResolvedPath.Assign(mWorkingPath);
// Make sure root paths have a trailing slash.
nsAutoString nsprPath(mWorkingPath);
if (mWorkingPath.Length() == 2 && mWorkingPath.CharAt(1) == u':') {
nsprPath.Append('\\');
}
// first we will see if the working path exists. If it doesn't then
// there is nothing more that can be done
nsresult rv = GetFileInfo(nsprPath, &mFileInfo64);
if (NS_FAILED(rv)) {
return rv;
}
if (mFileInfo64.type != PR_FILE_OTHER) {
mResolveDirty = false;
mDirty = false;
return NS_OK;
}
// OTHER from GetFileInfo currently means a symlink
rv = ResolveSymlink();
// Even if it fails we need to have the resolved path equal to working path
// for those functions that always use the resolved path.
if (NS_FAILED(rv)) {
mResolvedPath.Assign(mWorkingPath);
return rv;
}
mResolveDirty = false;
// get the details of the resolved path
rv = GetFileInfo(mResolvedPath, &mFileInfo64);
if (NS_FAILED(rv)) {
return rv;
}
mDirty = false;
return NS_OK;
}
/**
* Fills the mResolvedPath member variable with the file or symlink target
* if follow symlinks is on. This is a copy of the Resolve parts from
* ResolveAndStat. ResolveAndStat is much slower though because of the stat.
*
* @return NS_OK on success.
*/
nsresult nsLocalFile::Resolve() {
// if we aren't dirty then we are already done
if (!mResolveDirty) {
return NS_OK;
}
// we can't resolve/stat anything that isn't a valid NSPR addressable path
if (mWorkingPath.IsEmpty()) {
return NS_ERROR_FILE_INVALID_PATH;
}
// this is usually correct
mResolvedPath.Assign(mWorkingPath);
// TODO: Implement symlink support
mResolveDirty = false;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsLocalFile::nsIFile
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsLocalFile::Clone(nsIFile** aFile) {
// Just copy-construct ourselves
RefPtr<nsLocalFile> file = new nsLocalFile(*this);
file.forget(aFile);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::InitWithFile(nsIFile* aFile) {
if (NS_WARN_IF(!aFile)) {
return NS_ERROR_INVALID_ARG;
}
nsAutoString path;
aFile->GetPath(path);
if (path.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
return InitWithPath(path);
}
NS_IMETHODIMP
nsLocalFile::InitWithPath(const nsAString& aFilePath) {
MakeDirty();
nsAString::const_iterator begin, end;
aFilePath.BeginReading(begin);
aFilePath.EndReading(end);
// input string must not be empty
if (begin == end) {
return NS_ERROR_FAILURE;
}
char16_t firstChar = *begin;
char16_t secondChar = *(++begin);
// just do a sanity check. if it has any forward slashes, it is not a Native
// path on windows. Also, it must have a colon at after the first char.
if (FindCharInReadable(L'/', begin, end)) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
if (FilePreferences::IsBlockedUNCPath(aFilePath)) {
return NS_ERROR_FILE_ACCESS_DENIED;
}
if (secondChar != L':' && (secondChar != L'\\' || firstChar != L'\\')) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
if (secondChar == L':') {
// Make sure we have a valid drive, later code assumes the drive letter
// is a single char a-z or A-Z.
if (PathGetDriveNumberW(aFilePath.Data()) == -1) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
}
if (IsSpecialNTFSPath(aFilePath)) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
mWorkingPath = aFilePath;
// kill any trailing '\'
if (mWorkingPath.Last() == L'\\') {
mWorkingPath.Truncate(mWorkingPath.Length() - 1);
}
// Bug 1626514: make sure that we don't end up with multiple prefixes.
// Prepend the "\\?\" prefix if the useDOSDevicePathSyntax is set and the path
// starts with a disk designator and backslash.
if (mUseDOSDevicePathSyntax &&
FilePreferences::StartsWithDiskDesignatorAndBackslash(mWorkingPath)) {
mWorkingPath = kDevicePathSpecifier + mWorkingPath;
}
return NS_OK;
}
// Strip a handler command string of its quotes and parameters.
static void CleanupHandlerPath(nsString& aPath) {
// Example command strings passed into this routine:
// 1) C:\Program Files\Company\some.exe -foo -bar
// 2) C:\Program Files\Company\some.dll
// 3) C:\Windows\some.dll,-foo -bar
// 4) C:\Windows\some.cpl,-foo -bar
int32_t lastCommaPos = aPath.RFindChar(',');
if (lastCommaPos != kNotFound) aPath.Truncate(lastCommaPos);
aPath.Append(' ');
// case insensitive
int32_t index = aPath.Find(".exe ", true);
if (index == kNotFound) index = aPath.Find(".dll ", true);
if (index == kNotFound) index = aPath.Find(".cpl ", true);
if (index != kNotFound) aPath.Truncate(index + 4);
aPath.Trim(" ", true, true);
}
// Strip the windows host process bootstrap executable rundll32.exe
// from a handler's command string if it exists.
static void StripRundll32(nsString& aCommandString) {
// Example rundll formats:
// C:\Windows\System32\rundll32.exe "path to dll"
// rundll32.exe "path to dll"
// C:\Windows\System32\rundll32.exe "path to dll", var var
// rundll32.exe "path to dll", var var
constexpr auto rundllSegment = u"rundll32.exe "_ns;
constexpr auto rundllSegmentShort = u"rundll32 "_ns;
// case insensitive
int32_t strLen = rundllSegment.Length();
int32_t index = aCommandString.Find(rundllSegment, true);
if (index == kNotFound) {
strLen = rundllSegmentShort.Length();
index = aCommandString.Find(rundllSegmentShort, true);
}
if (index != kNotFound) {
uint32_t rundllSegmentLength = index + strLen;
aCommandString.Cut(0, rundllSegmentLength);
}
}
// Returns the fully qualified path to an application handler based on
// a parameterized command string. Note this routine should not be used
// to launch the associated application as it strips parameters and
// rundll.exe from the string. Designed for retrieving display information
// on a particular handler.
/* static */
bool nsLocalFile::CleanupCmdHandlerPath(nsAString& aCommandHandler) {
nsAutoString handlerCommand(aCommandHandler);
// Straight command path:
//
// %SystemRoot%\system32\NOTEPAD.EXE var
// "C:\Program Files\iTunes\iTunes.exe" var var
// C:\Program Files\iTunes\iTunes.exe var var
//
// Example rundll handlers:
//
// rundll32.exe "%ProgramFiles%\Win...ery\PhotoViewer.dll", var var
// rundll32.exe "%ProgramFiles%\Windows Photo Gallery\PhotoViewer.dll"
// C:\Windows\System32\rundll32.exe "path to dll", var var
// %SystemRoot%\System32\rundll32.exe "%ProgramFiles%\Win...ery\Photo
// Viewer.dll", var var
// Expand environment variables so we have full path strings.
uint32_t bufLength =
::ExpandEnvironmentStringsW(handlerCommand.get(), nullptr, 0);
if (bufLength == 0) // Error
return false;
auto destination = mozilla::MakeUniqueFallible<wchar_t[]>(bufLength);
if (!destination) return false;
if (!::ExpandEnvironmentStringsW(handlerCommand.get(), destination.get(),
bufLength))
return false;
handlerCommand.Assign(destination.get());
// Remove quotes around paths
handlerCommand.StripChars("\"");
// Strip windows host process bootstrap so we can get to the actual
// handler.
StripRundll32(handlerCommand);
// Trim any command parameters so that we have a native path we can
// initialize a local file with.
CleanupHandlerPath(handlerCommand);
aCommandHandler.Assign(handlerCommand);
return true;
}
NS_IMETHODIMP
nsLocalFile::InitWithCommandLine(const nsAString& aCommandLine) {
nsAutoString commandLine(aCommandLine);
if (!CleanupCmdHandlerPath(commandLine)) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
return InitWithPath(commandLine);
}
NS_IMETHODIMP
nsLocalFile::OpenNSPRFileDesc(int32_t aFlags, int32_t aMode,
PRFileDesc** aResult) {
nsresult rv = OpenNSPRFileDescMaybeShareDelete(aFlags, aMode, false, aResult);
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::OpenANSIFileDesc(const char* aMode, FILE** aResult) {
*aResult = _wfopen(mWorkingPath.get(), NS_ConvertASCIItoUTF16(aMode).get());
if (*aResult) {
return NS_OK;
}
return NS_ERROR_FAILURE;
}
static nsresult do_create(nsIFile* aFile, const nsString& aPath,
uint32_t aAttributes) {
PRFileDesc* file;
nsresult rv =
OpenFile(aPath, PR_RDONLY | PR_CREATE_FILE | PR_APPEND | PR_EXCL,
aAttributes, false, &file);
if (file) {
PR_Close(file);
}
if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
// need to return already-exists for directories (bug 452217)
bool isdir;
if (NS_SUCCEEDED(aFile->IsDirectory(&isdir)) && isdir) {
rv = NS_ERROR_FILE_ALREADY_EXISTS;
}
}
return rv;
}
static nsresult do_mkdir(nsIFile*, const nsString& aPath, uint32_t) {
if (!::CreateDirectoryW(aPath.get(), nullptr)) {
return ConvertWinError(GetLastError());
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Create(uint32_t aType, uint32_t aAttributes) {
if (aType != NORMAL_FILE_TYPE && aType != DIRECTORY_TYPE) {
return NS_ERROR_FILE_UNKNOWN_TYPE;
}
auto* createFunc = (aType == NORMAL_FILE_TYPE ? do_create : do_mkdir);
nsresult rv = createFunc(this, mWorkingPath, aAttributes);
if (NS_SUCCEEDED(rv) || NS_ERROR_FILE_ALREADY_EXISTS == rv) {
return rv;
}
// create directories to target
//
// A given local file can be either one of these forms:
//
// - normal: X:\some\path\on\this\drive
// ^--- start here
//
// - UNC path: \\machine\volume\some\path\on\this\drive
// ^--- start here
//
// Skip the first 'X:\' for the first form, and skip the first full
// '\\machine\volume\' segment for the second form.
wchar_t* path = char16ptr_t(mWorkingPath.BeginWriting());
if (path[0] == L'\\' && path[1] == L'\\') {
// dealing with a UNC path here; skip past '\\machine\'
path = wcschr(path + 2, L'\\');
if (!path) {
return NS_ERROR_FILE_INVALID_PATH;
}
++path;
}
// search for first slash after the drive (or volume) name
wchar_t* slash = wcschr(path, L'\\');
nsresult directoryCreateError = NS_OK;
if (slash) {
// skip the first '\\'
++slash;
slash = wcschr(slash, L'\\');
while (slash) {
*slash = L'\0';
if (!::CreateDirectoryW(mWorkingPath.get(), nullptr)) {
rv = ConvertWinError(GetLastError());
if (NS_ERROR_FILE_NOT_FOUND == rv &&
NS_ERROR_FILE_ACCESS_DENIED == directoryCreateError) {
// If a previous CreateDirectory failed due to access, return that.
return NS_ERROR_FILE_ACCESS_DENIED;
}
// perhaps the base path already exists, or perhaps we don't have
// permissions to create the directory. NOTE: access denied could
// occur on a parent directory even though it exists.
else if (rv != NS_ERROR_FILE_ALREADY_EXISTS &&
rv != NS_ERROR_FILE_ACCESS_DENIED) {
return rv;
}
directoryCreateError = rv;
}
*slash = L'\\';
++slash;
slash = wcschr(slash, L'\\');
}
}
// If our last CreateDirectory failed due to access, return that.
if (NS_ERROR_FILE_ACCESS_DENIED == directoryCreateError) {
return directoryCreateError;
}
return createFunc(this, mWorkingPath, aAttributes);
}
NS_IMETHODIMP
nsLocalFile::Append(const nsAString& aNode) {
// append this path, multiple components are not permitted
return AppendInternal(PromiseFlatString(aNode), false);
}
NS_IMETHODIMP
nsLocalFile::AppendRelativePath(const nsAString& aNode) {
// append this path, multiple components are permitted
return AppendInternal(PromiseFlatString(aNode), true);
}
nsresult nsLocalFile::AppendInternal(const nsString& aNode,
bool aMultipleComponents) {
if (aNode.IsEmpty()) {
return NS_OK;
}
// check the relative path for validity
if (aNode.First() == L'\\' || // can't start with an '\'
aNode.Contains(L'/') || // can't contain /
aNode.EqualsASCII("..")) { // can't be ..
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
if (aMultipleComponents) {
// can't contain .. as a path component. Ensure that the valid components
// "foo..foo", "..foo", and "foo.." are not falsely detected,
// but the invalid paths "..\", "foo\..", "foo\..\foo",
// "..\foo", etc are.
constexpr auto doubleDot = u"\\.."_ns;
nsAString::const_iterator start, end, offset;
aNode.BeginReading(start);
aNode.EndReading(end);
offset = end;
while (FindInReadable(doubleDot, start, offset)) {
if (offset == end || *offset == L'\\') {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
start = offset;
offset = end;
}
// catches the remaining cases of prefixes
if (StringBeginsWith(aNode, u"..\\"_ns)) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
}
// single components can't contain '\'
else if (aNode.Contains(L'\\')) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
MakeDirty();
mWorkingPath.Append('\\');
mWorkingPath.Append(aNode);
if (IsSpecialNTFSPath(mWorkingPath)) {
// Revert changes to mWorkingPath:
mWorkingPath.SetLength(mWorkingPath.Length() - aNode.Length() - 1);
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
return NS_OK;
}
nsresult nsLocalFile::OpenNSPRFileDescMaybeShareDelete(int32_t aFlags,
int32_t aMode,
bool aShareDelete,
PRFileDesc** aResult) {
return OpenFile(mWorkingPath, aFlags, aMode, aShareDelete, aResult);
}
#define TOUPPER(u) (((u) >= L'a' && (u) <= L'z') ? (u) - (L'a' - L'A') : (u))
NS_IMETHODIMP
nsLocalFile::Normalize() {
// XXX See bug 187957 comment 18 for possible problems with this
// implementation.
if (mWorkingPath.IsEmpty()) {
return NS_OK;
}
nsAutoString path(mWorkingPath);
// find the index of the root backslash for the path. Everything before
// this is considered fully normalized and cannot be ascended beyond
// using ".." For a local drive this is the first slash (e.g. "c:\").
// For a UNC path it is the slash following the share name
// (e.g. "\\server\share\").
int32_t rootIdx = 2; // default to local drive
if (path.First() == L'\\') { // if a share then calculate the rootIdx
rootIdx = path.FindChar(L'\\', 2); // skip \\ in front of the server
if (rootIdx == kNotFound) {
return NS_OK; // already normalized
}
rootIdx = path.FindChar(L'\\', rootIdx + 1);
if (rootIdx == kNotFound) {
return NS_OK; // already normalized
}
} else if (path.CharAt(rootIdx) != L'\\') {
// The path has been specified relative to the current working directory
// for that drive. To normalize it, the current working directory for
// that drive needs to be inserted before the supplied relative path
// which will provide an absolute path (and the rootIdx will still be 2).
WCHAR cwd[MAX_PATH];
WCHAR* pcwd = cwd;
int drive = TOUPPER(path.First()) - 'A' + 1;
/* We need to worry about IPH, for details read bug 419326.
* uses a bitmask, bit 0 is 'a:'
* take an int, 1 is 'a:'.
*
* Because of this, we need to do some math. Subtract 1 to convert from
* _chdrive/_getdcwd format to _getdrives drive numbering.
* Shift left x bits to convert from integer indexing to bitfield indexing.
* And of course, we need to find out if the drive is in the bitmask.
*
* If we're really unlucky, we can still lose, but only if the user
* manages to eject the drive between our call to _getdrives() and
* our *calls* to _wgetdcwd.
*/
if (!((1 << (drive - 1)) & _getdrives())) {
return NS_ERROR_FILE_INVALID_PATH;
}
if (!_wgetdcwd(drive, pcwd, MAX_PATH)) {
pcwd = _wgetdcwd(drive, 0, 0);
}
if (!pcwd) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsAutoString currentDir(pcwd);
if (pcwd != cwd) {
free(pcwd);
}
if (currentDir.Last() == '\\') {
path.Replace(0, 2, currentDir);
} else {
path.Replace(0, 2, currentDir + u"\\"_ns);
}
}
MOZ_ASSERT(0 < rootIdx && rootIdx < (int32_t)path.Length(),
"rootIdx is invalid");
MOZ_ASSERT(path.CharAt(rootIdx) == '\\', "rootIdx is invalid");
// if there is nothing following the root path then it is already normalized
if (rootIdx + 1 == (int32_t)path.Length()) {
return NS_OK;
}
// assign the root
const char16_t* pathBuffer = path.get(); // simplify access to the buffer
mWorkingPath.SetCapacity(path.Length()); // it won't ever grow longer
mWorkingPath.Assign(pathBuffer, rootIdx);
// Normalize the path components. The actions taken are:
//
// "\\" condense to single backslash
// "." remove from path
// ".." up a directory
// "..." remove from path (any number of dots > 2)
//
// The last form is something that Windows 95 and 98 supported and
// is a shortcut for changing up multiple directories. Windows XP
// and ilk ignore it in a path, as is done here.
int32_t len, begin, end = rootIdx;
while (end < (int32_t)path.Length()) {
// find the current segment (text between the backslashes) to
// be examined, this will set the following variables:
// begin == index of first char in segment
// end == index 1 char after last char in segment
// len == length of segment
begin = end + 1;
end = path.FindChar('\\', begin);
if (end == kNotFound) {
end = path.Length();
}
len = end - begin;
// ignore double backslashes
if (len == 0) {
continue;
}
// len != 0, and interesting paths always begin with a dot
if (pathBuffer[begin] == '.') {
// ignore single dots
if (len == 1) {
continue;
}
// handle multiple dots
if (len >= 2 && pathBuffer[begin + 1] == L'.') {
// back up a path component on double dot
if (len == 2) {
int32_t prev = mWorkingPath.RFindChar('\\');
if (prev >= rootIdx) {
mWorkingPath.Truncate(prev);
}
continue;
}
// length is > 2 and the first two characters are dots.
// if the rest of the string is dots, then ignore it.
int idx = len - 1;
for (; idx >= 2; --idx) {
if (pathBuffer[begin + idx] != L'.') {
break;
}
}
// this is true if the loop above didn't break
// and all characters in this segment are dots.
if (idx < 2) {
continue;
}
}
}
// add the current component to the path, including the preceding backslash
mWorkingPath.Append(pathBuffer + begin - 1, len + 1);
}
// kill trailing dots and spaces.
int32_t filePathLen = mWorkingPath.Length() - 1;
while (filePathLen > 0 && (mWorkingPath[filePathLen] == L' ' ||
mWorkingPath[filePathLen] == L'.')) {
mWorkingPath.Truncate(filePathLen--);
}
MakeDirty();
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetLeafName(nsAString& aLeafName) {
aLeafName.Truncate();
if (mWorkingPath.IsEmpty()) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
int32_t offset = mWorkingPath.RFindChar(L'\\');
// if the working path is just a node without any lashes.
if (offset == kNotFound) {
aLeafName = mWorkingPath;
} else {
aLeafName = Substring(mWorkingPath, offset + 1);
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetLeafName(const nsAString& aLeafName) {
MakeDirty();
if (mWorkingPath.IsEmpty()) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
// cannot use nsCString::RFindChar() due to 0x5c problem
int32_t offset = mWorkingPath.RFindChar(L'\\');
nsString newDir;
if (offset) {
newDir = Substring(mWorkingPath, 0, offset + 1) + aLeafName;
} else {
newDir = mWorkingPath + aLeafName;
}
if (IsSpecialNTFSPath(newDir)) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
mWorkingPath.Assign(newDir);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPath(nsAString& aResult) {
MOZ_ASSERT_IF(
mUseDOSDevicePathSyntax,
!FilePreferences::StartsWithDiskDesignatorAndBackslash(mWorkingPath));
aResult = mWorkingPath;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetCanonicalPath(nsAString& aResult) {
EnsureShortPath();
aResult.Assign(mShortWorkingPath);
return NS_OK;
}
typedef struct {
WORD wLanguage;
WORD wCodePage;
} LANGANDCODEPAGE;
NS_IMETHODIMP
nsLocalFile::GetVersionInfoField(const char* aField, nsAString& aResult) {
nsresult rv = NS_ERROR_FAILURE;
const WCHAR* path = mWorkingPath.get();
DWORD dummy;
DWORD size = ::GetFileVersionInfoSizeW(path, &dummy);
if (!size) {
return rv;