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gecko-dev/xpcom/io/nsLocalFileWin.cpp

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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/UniquePtrExtensions.h"
#include "mozilla/Utf8.h"
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "GeckoProfiler.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"
using namespace mozilla;
#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
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:
nsDriveEnumerator();
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;
};
//-----------------------------------------------------------------------------
// static helper functions
//-----------------------------------------------------------------------------
// |out| must be an allocated buffer of size MAX_PATH
static nsresult ResolveShellLink(const WCHAR* aIn, WCHAR* aOut) {
RefPtr<IPersistFile> persistFile;
RefPtr<IShellLinkW> shellLink;
// Get a pointer to the IPersistFile interface.
if (FAILED(CoCreateInstance(CLSID_ShellLink, nullptr, CLSCTX_INPROC_SERVER,
IID_IShellLinkW, getter_AddRefs(shellLink))) ||
FAILED(shellLink->QueryInterface(IID_IPersistFile,
getter_AddRefs(persistFile))) ||
FAILED(persistFile->Load(aIn, STGM_READ)) ||
FAILED(shellLink->Resolve(nullptr, SLR_NO_UI)) ||
FAILED(shellLink->GetPath(aOut, MAX_PATH, nullptr, SLGP_UNCPRIORITY))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
// certainly not all the error that can be
// encountered, but many of them common ones
static nsresult ConvertWinError(DWORD aWinErr) {
nsresult rv;
switch (aWinErr) {
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_INVALID_DRIVE:
case ERROR_NOT_READY:
rv = NS_ERROR_FILE_NOT_FOUND;
break;
case ERROR_ACCESS_DENIED:
case ERROR_NOT_SAME_DEVICE:
rv = NS_ERROR_FILE_ACCESS_DENIED;
break;
case ERROR_SHARING_VIOLATION: // CreateFile without sharing flags
case ERROR_LOCK_VIOLATION: // LockFile, LockFileEx
rv = NS_ERROR_FILE_IS_LOCKED;
break;
case ERROR_NOT_ENOUGH_MEMORY:
case ERROR_INVALID_BLOCK:
case ERROR_INVALID_HANDLE:
case ERROR_ARENA_TRASHED:
rv = NS_ERROR_OUT_OF_MEMORY;
break;
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:
rv = NS_ERROR_FILE_TOO_BIG;
break;
case ERROR_FILE_EXISTS:
case ERROR_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 0:
rv = NS_OK;
break;
default:
rv = NS_ERROR_FAILURE;
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;
}
static bool IsShortcutPath(const nsAString& aPath) {
// Under Windows, the shortcuts are just files with a ".lnk" extension.
// Note also that we don't resolve links in the middle of paths.
// i.e. "c:\foo.lnk\bar.txt" is invalid.
MOZ_ASSERT(!aPath.IsEmpty(), "don't pass an empty string");
int32_t len = aPath.Length();
return len >= 4 && (StringTail(aPath, 4).LowerCaseEqualsASCII(".lnk"));
}
//-----------------------------------------------------------------------------
// 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) {
WIN32_FILE_ATTRIBUTE_DATA fileData;
if (aName.IsEmpty() || aName.FindCharInSet(u"?*") != kNotFound) {
return NS_ERROR_INVALID_ARG;
}
if (!::GetFileAttributesExW(aName.get(), GetFileExInfoStandard, &fileData)) {
return ConvertWinError(GetLastError());
}
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;
if (aName.Length() + 3 >= MAX_PATH) {
return NS_ERROR_FILE_NAME_TOO_LONG;
}
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
if (NS_FAILED(CloseDir(mDir))) {
return NS_ERROR_FAILURE;
}
*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), mFollowSymlinks(false) {}
nsLocalFile::nsLocalFile(const nsAString& aFilePath) : mFollowSymlinks(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),
mFollowSymlinks(aOther.mFollowSymlinks),
mWorkingPath(aOther.mWorkingPath) {}
// Resolve the shortcut file from mWorkingPath and write the path
// it points to into mResolvedPath.
nsresult nsLocalFile::ResolveShortcut() {
mResolvedPath.SetLength(MAX_PATH);
if (mResolvedPath.Length() != MAX_PATH) {
return NS_ERROR_OUT_OF_MEMORY;
}
wchar_t* resolvedPath = mResolvedPath.get();
// resolve this shortcut
nsresult rv = ResolveShellLink(mWorkingPath.get(), resolvedPath);
size_t len = NS_FAILED(rv) ? 0 : wcslen(resolvedPath);
mResolvedPath.SetLength(len);
return rv;
}
// 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 this isn't a shortcut file or we aren't following symlinks then we're
// done
if (!mFollowSymlinks || mFileInfo64.type != PR_FILE_FILE ||
!IsShortcutPath(mWorkingPath)) {
mDirty = false;
mResolveDirty = false;
return NS_OK;
}
// we need to resolve this shortcut to what it points to, this will
// set mResolvedPath. Even if it fails we need to have the resolved
// path equal to working path for those functions that always use
// the resolved path.
rv = ResolveShortcut();
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);
// if this isn't a shortcut file or we aren't following symlinks then
// we're done.
if (!mFollowSymlinks || !IsShortcutPath(mWorkingPath)) {
mResolveDirty = false;
return NS_OK;
}
// we need to resolve this shortcut to what it points to, this will
// set mResolvedPath. Even if it fails we need to have the resolved
// path equal to working path for those functions that always use
// the resolved path.
nsresult rv = ResolveShortcut();
if (NS_FAILED(rv)) {
mResolvedPath.Assign(mWorkingPath);
return rv;
}
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;
}
}
mWorkingPath = aFilePath;
// kill any trailing '\'
if (mWorkingPath.Last() == L'\\') {
mWorkingPath.Truncate(mWorkingPath.Length() - 1);
}
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
NS_NAMED_LITERAL_STRING(rundllSegment, "rundll32.exe ");
NS_NAMED_LITERAL_STRING(rundllSegmentShort, "rundll32 ");
// 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) {
nsresult rv = Resolve();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND) {
return rv;
}
*aResult = _wfopen(mResolvedPath.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;
}
nsresult rv = Resolve();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND) {
return rv;
}
auto* createFunc = (aType == NORMAL_FILE_TYPE ? do_create : do_mkdir);
rv = createFunc(this, mResolvedPath, 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(mResolvedPath.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(mResolvedPath.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, mResolvedPath, 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.
NS_NAMED_LITERAL_STRING(doubleDot, "\\..");
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, NS_LITERAL_STRING("..\\"))) {
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);
return NS_OK;
}
nsresult nsLocalFile::OpenNSPRFileDescMaybeShareDelete(int32_t aFlags,
int32_t aMode,
bool aShareDelete,
PRFileDesc** aResult) {
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
return OpenFile(mResolvedPath, 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.
* _getdrives - http://msdn2.microsoft.com/en-us/library/xdhk0xd2.aspx
* uses a bitmask, bit 0 is 'a:'
* _chdrive - http://msdn2.microsoft.com/en-us/library/0d1409hb.aspx
* _getdcwd - http://msdn2.microsoft.com/en-us/library/7t2zk3s4.aspx
* 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 + NS_LITERAL_STRING("\\"));
}
}
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'\\');
if (offset) {
mWorkingPath.Truncate(offset + 1);
}
mWorkingPath.Append(aLeafName);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPath(nsAString& aResult) {
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 = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
rv = NS_ERROR_FAILURE;
const WCHAR* path =
mFollowSymlinks ? mResolvedPath.get() : mWorkingPath.get();
DWORD dummy;
DWORD size = ::GetFileVersionInfoSizeW(path, &dummy);
if (!size) {
return rv;
}
void* ver = moz_xcalloc(size, 1);
if (::GetFileVersionInfoW(path, 0, size, ver)) {
LANGANDCODEPAGE* translate = nullptr;
UINT pageCount;
BOOL queryResult = ::VerQueryValueW(ver, L"\\VarFileInfo\\Translation",
(void**)&translate, &pageCount);
if (queryResult && translate) {
for (int32_t i = 0; i < 2; ++i) {
wchar_t subBlock[MAX_PATH];
_snwprintf(subBlock, MAX_PATH, L"\\StringFileInfo\\%04x%04x\\%s",
(i == 0 ? translate[0].wLanguage : ::GetUserDefaultLangID()),
translate[0].wCodePage,
NS_ConvertASCIItoUTF16(nsDependentCString(aField)).get());
subBlock[MAX_PATH - 1] = 0;
LPVOID value = nullptr;
UINT size;
queryResult = ::VerQueryValueW(ver, subBlock, &value, &size);
if (queryResult && value) {
aResult.Assign(static_cast<char16_t*>(value));
if (!aResult.IsEmpty()) {
rv = NS_OK;
break;
}
}
}
}
}
free(ver);
return rv;
}
NS_IMETHODIMP
nsLocalFile::OpenNSPRFileDescShareDelete(int32_t aFlags, int32_t aMode,
PRFileDesc** aResult) {
nsresult rv = OpenNSPRFileDescMaybeShareDelete(aFlags, aMode, true, aResult);
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
/**
* Determines if the drive type for the specified file is rmeote or local.
*
* @param path The path of the file to check
* @param remote Out parameter, on function success holds true if the specified
* file path is remote, or false if the file path is local.
* @return true on success. The return value implies absolutely nothing about
* wether the file is local or remote.
*/
static bool IsRemoteFilePath(LPCWSTR aPath, bool& aRemote) {
// Obtain the parent directory path and make sure it ends with
// a trailing backslash.
WCHAR dirPath[MAX_PATH + 1] = {0};
wcsncpy(dirPath, aPath, MAX_PATH);
if (!PathRemoveFileSpecW(dirPath)) {
return false;
}
size_t len = wcslen(dirPath);
// In case the dirPath holds exaclty MAX_PATH and remains unchanged, we
// recheck the required length here since we need to terminate it with
// a backslash.
if (len >= MAX_PATH) {
return false;
}
dirPath[len] = L'\\';
dirPath[len + 1] = L'\0';
UINT driveType = GetDriveTypeW(dirPath);
aRemote = driveType == DRIVE_REMOTE;
return true;
}
nsresult nsLocalFile::CopySingleFile(nsIFile* aSourceFile, nsIFile* aDestParent,
const nsAString& aNewName,
uint32_t aOptions) {
nsresult rv = NS_OK;
nsAutoString filePath;
bool move = aOptions & (Move | Rename);
// get the path that we are going to copy to.
// Since windows does not know how to auto
// resolve shortcuts, we must work with the
// target.
nsAutoString destPath;
rv = aDestParent->GetTarget(destPath);
if (NS_FAILED(rv)) {
return rv;
}
destPath.Append('\\');
if (aNewName.IsEmpty()) {
nsAutoString aFileName;
aSourceFile->GetLeafName(aFileName);
destPath.Append(aFileName);
} else {
destPath.Append(aNewName);
}
if (aOptions & FollowSymlinks) {
rv = aSourceFile->GetTarget(filePath);
if (filePath.IsEmpty()) {
rv = aSourceFile->GetPath(filePath);
}
} else {
rv = aSourceFile->GetPath(filePath);
}
if (NS_FAILED(rv)) {
return rv;
}
if (FilePreferences::IsBlockedUNCPath(destPath)) {
return NS_ERROR_FILE_ACCESS_DENIED;
}
int copyOK = 0;
if (move) {
copyOK = ::MoveFileExW(filePath.get(), destPath.get(),
MOVEFILE_REPLACE_EXISTING);
}
// If we either failed to move the file, or this is a copy, try copying:
if (!copyOK && (!move || GetLastError() == ERROR_NOT_SAME_DEVICE)) {
// Failed renames here should just return access denied.
if (move && (aOptions & Rename)) {
return NS_ERROR_FILE_ACCESS_DENIED;
}
// Pass the flag COPY_FILE_NO_BUFFERING to CopyFileEx as we may be copying
// to a SMBV2 remote drive. Without this parameter subsequent append mode
// file writes can cause the resultant file to become corrupt. We only need
// to do this if the major version of Windows is > 5(Only Windows Vista and
// above can support SMBV2). With a 7200RPM hard drive: Copying a 1KB file
// with COPY_FILE_NO_BUFFERING takes about 30-60ms. Copying a 1KB file
// without COPY_FILE_NO_BUFFERING takes < 1ms. So we only use
// COPY_FILE_NO_BUFFERING when we have a remote drive.
DWORD dwCopyFlags = COPY_FILE_ALLOW_DECRYPTED_DESTINATION;
bool path1Remote, path2Remote;
if (!IsRemoteFilePath(filePath.get(), path1Remote) ||
!IsRemoteFilePath(destPath.get(), path2Remote) || path1Remote ||
path2Remote) {
dwCopyFlags |= COPY_FILE_NO_BUFFERING;
}
copyOK = ::CopyFileExW(filePath.get(), destPath.get(), nullptr, nullptr,
nullptr, dwCopyFlags);
if (move && copyOK) {
DeleteFileW(filePath.get());
}
}
if (!copyOK) { // CopyFileEx and MoveFileEx return zero at failure.
rv = ConvertWinError(GetLastError());
} else if (move && !(aOptions & SkipNtfsAclReset)) {
// Set security permissions to inherit from parent.
// Note: propagates to all children: slow for big file trees
PACL pOldDACL = nullptr;
PSECURITY_DESCRIPTOR pSD = nullptr;
::GetNamedSecurityInfoW((LPWSTR)destPath.get(), SE_FILE_OBJECT,
DACL_SECURITY_INFORMATION, nullptr, nullptr,
&pOldDACL, nullptr, &pSD);
if (pOldDACL)
::SetNamedSecurityInfoW(
(LPWSTR)destPath.get(), SE_FILE_OBJECT,
DACL_SECURITY_INFORMATION | UNPROTECTED_DACL_SECURITY_INFORMATION,
nullptr, nullptr, pOldDACL, nullptr);
if (pSD) {
LocalFree((HLOCAL)pSD);
}
}
return rv;
}
nsresult nsLocalFile::CopyMove(nsIFile* aParentDir, const nsAString& aNewName,
uint32_t aOptions) {
bool move = aOptions & (Move | Rename);
bool followSymlinks = aOptions & FollowSymlinks;
// If we're not provided with a new parent, we're copying or moving to
// another file in the same directory and can safely skip checking if the
// destination directory exists:
bool targetInSameDirectory = !aParentDir;
nsCOMPtr<nsIFile> newParentDir = aParentDir;
// check to see if this exists, otherwise return an error.
// we will check this by resolving. If the user wants us
// to follow links, then we are talking about the target,
// hence we can use the |FollowSymlinks| option.
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
if (!newParentDir) {
// no parent was specified. We must rename.
if (aNewName.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
rv = GetParent(getter_AddRefs(newParentDir));
if (NS_FAILED(rv)) {
return rv;
}
}
if (!newParentDir) {
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
}
if (!targetInSameDirectory) {
// make sure it exists and is a directory. Create it if not there.
bool exists = false;
rv = newParentDir->Exists(&exists);
if (NS_FAILED(rv)) {
return rv;
}
if (!exists) {
rv = newParentDir->Create(DIRECTORY_TYPE,
0644); // TODO, what permissions should we use
if (NS_FAILED(rv)) {
return rv;
}
} else {
bool isDir = false;
rv = newParentDir->IsDirectory(&isDir);
if (NS_FAILED(rv)) {
return rv;
}
if (!isDir) {
if (followSymlinks) {
bool isLink = false;
rv = newParentDir->IsSymlink(&isLink);
if (NS_FAILED(rv)) {
return rv;
}
if (isLink) {
nsAutoString target;
rv = newParentDir->GetTarget(target);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIFile> realDest = new nsLocalFile();
rv = realDest->InitWithPath(target);
if (NS_FAILED(rv)) {
return rv;
}
return CopyMove(realDest, aNewName, aOptions);
}
} else {
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
}
}
}
}
// Try different ways to move/copy files/directories
bool done = false;
bool isDir = false;
rv = IsDirectory(&isDir);
if (NS_FAILED(rv)) {
return rv;
}
bool isSymlink = false;
rv = IsSymlink(&isSymlink);
if (NS_FAILED(rv)) {
return rv;
}
// Try to move the file or directory, or try to copy a single file (or
// non-followed symlink)
if (move || !isDir || (isSymlink && !followSymlinks)) {
// Copy/Move single file, or move a directory
if (!aParentDir) {
aOptions |= SkipNtfsAclReset;
}
rv = CopySingleFile(this, newParentDir, aNewName, aOptions);
done = NS_SUCCEEDED(rv);
// If we are moving a directory and that fails, fallback on directory
// enumeration. See bug 231300 for details.
if (!done && !(move && isDir)) {
return rv;
}
}
// Not able to copy or move directly, so enumerate it
if (!done) {
// create a new target destination in the new parentDir;
nsCOMPtr<nsIFile> target;
rv = newParentDir->Clone(getter_AddRefs(target));
if (NS_FAILED(rv)) {
return rv;
}
nsAutoString allocatedNewName;
if (aNewName.IsEmpty()) {
bool isLink = false;
rv = IsSymlink(&isLink);
if (NS_FAILED(rv)) {
return rv;
}
if (isLink) {
nsAutoString temp;
rv = GetTarget(temp);
if (NS_FAILED(rv)) {
return rv;
}
int32_t offset = temp.RFindChar(L'\\');
if (offset == kNotFound) {
allocatedNewName = temp;
} else {
allocatedNewName = Substring(temp, offset + 1);
}
} else {
GetLeafName(allocatedNewName); // this should be the leaf name of the
}
} else {
allocatedNewName = aNewName;
}
rv = target->Append(allocatedNewName);
if (NS_FAILED(rv)) {
return rv;
}
allocatedNewName.Truncate();
bool exists = false;
// check if the destination directory already exists
rv = target->Exists(&exists);
if (NS_FAILED(rv)) {
return rv;
}
if (!exists) {
// if the destination directory cannot be created, return an error
rv = target->Create(DIRECTORY_TYPE,
0644); // TODO, what permissions should we use
if (NS_FAILED(rv)) {
return rv;
}
} else {
// check if the destination directory is writable and empty
bool isWritable = false;
rv = target->IsWritable(&isWritable);
if (NS_FAILED(rv)) {
return rv;
}
if (!isWritable) {
return NS_ERROR_FILE_ACCESS_DENIED;
}
nsCOMPtr<nsIDirectoryEnumerator> targetIterator;
rv = target->GetDirectoryEntries(getter_AddRefs(targetIterator));
if (NS_FAILED(rv)) {
return rv;
}
bool more;
targetIterator->HasMoreElements(&more);
// return error if target directory is not empty
if (more) {
return NS_ERROR_FILE_DIR_NOT_EMPTY;
}
}
RefPtr<nsDirEnumerator> dirEnum = new nsDirEnumerator();
rv = dirEnum->Init(this);
if (NS_FAILED(rv)) {
NS_WARNING("dirEnum initialization failed");
return rv;
}
nsCOMPtr<nsIFile> file;
while (NS_SUCCEEDED(dirEnum->GetNextFile(getter_AddRefs(file))) && file) {
bool isDir = false;
rv = file->IsDirectory(&isDir);
if (NS_FAILED(rv)) {
return rv;
}
bool isLink = false;
rv = file->IsSymlink(&isLink);
if (NS_FAILED(rv)) {
return rv;
}
if (move) {
if (followSymlinks) {
return NS_ERROR_FAILURE;
}
rv = file->MoveTo(target, EmptyString());
if (NS_FAILED(rv)) {
return rv;
}
} else {
if (followSymlinks) {
rv = file->CopyToFollowingLinks(target, EmptyString());
} else {
rv = file->CopyTo(target, EmptyString());
}
if (NS_FAILED(rv)) {
return rv;
}
}
}
// we've finished moving all the children of this directory
// in the new directory. so now delete the directory
// note, we don't need to do a recursive delete.
// MoveTo() is recursive. At this point,
// we've already moved the children of the current folder
// to the new location. nothing should be left in the folder.
if (move) {
rv = Remove(false /* recursive */);
if (NS_FAILED(rv)) {
return rv;
}
}
}
// If we moved, we want to adjust this.
if (move) {
MakeDirty();
nsAutoString newParentPath;
newParentDir->GetPath(newParentPath);
if (newParentPath.IsEmpty()) {
return NS_ERROR_FAILURE;
}
if (aNewName.IsEmpty()) {
nsAutoString aFileName;
GetLeafName(aFileName);
InitWithPath(newParentPath);
Append(aFileName);
} else {
InitWithPath(newParentPath);
Append(aNewName);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CopyTo(nsIFile* aNewParentDir, const nsAString& aNewName) {
return CopyMove(aNewParentDir, aNewName, 0);
}
NS_IMETHODIMP
nsLocalFile::CopyToFollowingLinks(nsIFile* aNewParentDir,
const nsAString& aNewName) {
return CopyMove(aNewParentDir, aNewName, FollowSymlinks);
}
NS_IMETHODIMP
nsLocalFile::MoveTo(nsIFile* aNewParentDir, const nsAString& aNewName) {
return CopyMove(aNewParentDir, aNewName, Move);
}
NS_IMETHODIMP
nsLocalFile::RenameTo(nsIFile* aNewParentDir, const nsAString& aNewName) {
// If we're not provided with a new parent, we're renaming inside one and
// the same directory and can safely skip checking if the destination
// directory exists:
bool targetInSameDirectory = !aNewParentDir;
nsCOMPtr<nsIFile> targetParentDir = aNewParentDir;
// check to see if this exists, otherwise return an error.
// we will check this by resolving. If the user wants us
// to follow links, then we are talking about the target,
// hence we can use the |followSymlinks| parameter.
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
if (!targetParentDir) {
// no parent was specified. We must rename.
if (aNewName.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
rv = GetParent(getter_AddRefs(targetParentDir));
if (NS_FAILED(rv)) {
return rv;
}
}
if (!targetParentDir) {
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
}
if (!targetInSameDirectory) {
// make sure it exists and is a directory. Create it if not there.
bool exists = false;
rv = targetParentDir->Exists(&exists);
if (NS_FAILED(rv)) {
return rv;
}
if (!exists) {
rv = targetParentDir->Create(DIRECTORY_TYPE, 0644);
if (NS_FAILED(rv)) {
return rv;
}
} else {
bool isDir = false;
rv = targetParentDir->IsDirectory(&isDir);
if (NS_FAILED(rv)) {
return rv;
}
if (!isDir) {
return NS_ERROR_FILE_DESTINATION_NOT_DIR;
}
}
}
uint32_t options = Rename;
if (!aNewParentDir) {
options |= SkipNtfsAclReset;
}
// Move single file, or move a directory
return CopySingleFile(this, targetParentDir, aNewName, options);
}
NS_IMETHODIMP
nsLocalFile::RenameToNative(nsIFile* aNewParentDir,
const nsACString& aNewName) {
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNewName, tmp);
if (NS_SUCCEEDED(rv)) {
return RenameTo(aNewParentDir, tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::Load(PRLibrary** aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
bool isFile;
nsresult rv = IsFile(&isFile);
if (NS_FAILED(rv)) {
return rv;
}
if (!isFile) {
return NS_ERROR_FILE_IS_DIRECTORY;
}
#ifdef NS_BUILD_REFCNT_LOGGING
nsTraceRefcnt::SetActivityIsLegal(false);
#endif
PRLibSpec libSpec;
libSpec.value.pathname_u = mResolvedPath.get();
libSpec.type = PR_LibSpec_PathnameU;
*aResult = PR_LoadLibraryWithFlags(libSpec, 0);
#ifdef NS_BUILD_REFCNT_LOGGING
nsTraceRefcnt::SetActivityIsLegal(true);
#endif
if (*aResult) {
return NS_OK;
}
return NS_ERROR_NULL_POINTER;
}
NS_IMETHODIMP
nsLocalFile::Remove(bool aRecursive) {
// NOTE:
//
// if the working path points to a shortcut, then we will only
// delete the shortcut itself. even if the shortcut points to
// a directory, we will not recurse into that directory or
// delete that directory itself. likewise, if the shortcut
// points to a normal file, we will not delete the real file.
// this is done to be consistent with the other platforms that
// behave this way. we do this even if the followLinks attribute
// is set to true. this helps protect against misuse that could
// lead to security bugs (e.g., bug 210588).
//
// Since shortcut files are no longer permitted to be used as unix-like
// symlinks interspersed in the path (e.g. "c:/file.lnk/foo/bar.txt")
// this processing is a lot simpler. Even if the shortcut file is
// pointing to a directory, only the mWorkingPath value is used and so
// only the shortcut file will be deleted.
// Check we are correctly initialized.
CHECK_mWorkingPath();
nsresult rv = NS_OK;
bool isLink = false;
rv = IsSymlink(&isLink);
if (NS_FAILED(rv)) {
return rv;
}
// only check to see if we have a directory if it isn't a link
bool isDir = false;
if (!isLink) {
rv = IsDirectory(&isDir);
if (NS_FAILED(rv)) {
return rv;
}
}
if (isDir) {
if (aRecursive) {
RefPtr<nsDirEnumerator> dirEnum = new nsDirEnumerator();
rv = dirEnum->Init(this);
if (NS_FAILED(rv)) {
return rv;
}
bool more = false;
while (NS_SUCCEEDED(dirEnum->HasMoreElements(&more)) && more) {
nsCOMPtr<nsISupports> item;
dirEnum->GetNext(getter_AddRefs(item));
nsCOMPtr<nsIFile> file = do_QueryInterface(item);
if (file) {
file->Remove(aRecursive);
}
}
}
if (RemoveDirectoryW(mWorkingPath.get()) == 0) {
return ConvertWinError(GetLastError());
}
} else {
if (DeleteFileW(mWorkingPath.get()) == 0) {
return ConvertWinError(GetLastError());
}
}
MakeDirty();
return rv;
}
NS_IMETHODIMP
nsLocalFile::GetLastModifiedTime(PRTime* aLastModifiedTime) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aLastModifiedTime)) {
return NS_ERROR_INVALID_ARG;
}
// get the modified time of the target as determined by mFollowSymlinks
// If true, then this will be for the target of the shortcut file,
// otherwise it will be for the shortcut file itself (i.e. the same
// results as GetLastModifiedTimeOfLink)
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
// microseconds -> milliseconds
*aLastModifiedTime = mFileInfo64.modifyTime / PR_USEC_PER_MSEC;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetLastModifiedTimeOfLink(PRTime* aLastModifiedTime) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aLastModifiedTime)) {
return NS_ERROR_INVALID_ARG;
}
// The caller is assumed to have already called IsSymlink
// and to have found that this file is a link.
PRFileInfo64 info;
nsresult rv = GetFileInfo(mWorkingPath, &info);
if (NS_FAILED(rv)) {
return rv;
}
// microseconds -> milliseconds
*aLastModifiedTime = info.modifyTime / PR_USEC_PER_MSEC;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetLastModifiedTime(PRTime aLastModifiedTime) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
// set the modified time of the target as determined by mFollowSymlinks
// If true, then this will be for the target of the shortcut file,
// otherwise it will be for the shortcut file itself (i.e. the same
// results as SetLastModifiedTimeOfLink)
rv = SetModDate(aLastModifiedTime, mResolvedPath.get());
if (NS_SUCCEEDED(rv)) {
MakeDirty();
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::SetLastModifiedTimeOfLink(PRTime aLastModifiedTime) {
// The caller is assumed to have already called IsSymlink
// and to have found that this file is a link.
nsresult rv = SetModDate(aLastModifiedTime, mWorkingPath.get());
if (NS_SUCCEEDED(rv)) {
MakeDirty();
}
return rv;
}
nsresult nsLocalFile::SetModDate(PRTime aLastModifiedTime,
const wchar_t* aFilePath) {
// The FILE_FLAG_BACKUP_SEMANTICS is required in order to change the
// modification time for directories.
HANDLE file = ::CreateFileW(aFilePath, // pointer to name of the file
GENERIC_WRITE, // access (write) mode
0, // share mode
nullptr, // pointer to security attributes
OPEN_EXISTING, // how to create
FILE_FLAG_BACKUP_SEMANTICS, // file attributes
nullptr);
if (file == INVALID_HANDLE_VALUE) {
return ConvertWinError(GetLastError());
}
FILETIME ft;
SYSTEMTIME st;
PRExplodedTime pret;
// PR_ExplodeTime expects usecs...
PR_ExplodeTime(aLastModifiedTime * PR_USEC_PER_MSEC, PR_GMTParameters, &pret);
st.wYear = pret.tm_year;
st.wMonth =
pret.tm_month + 1; // Convert start offset -- Win32: Jan=1; NSPR: Jan=0
st.wDayOfWeek = pret.tm_wday;
st.wDay = pret.tm_mday;
st.wHour = pret.tm_hour;
st.wMinute = pret.tm_min;
st.wSecond = pret.tm_sec;
st.wMilliseconds = pret.tm_usec / 1000;
nsresult rv = NS_OK;
// if at least one of these fails...
if (!(SystemTimeToFileTime(&st, &ft) != 0 &&
SetFileTime(file, nullptr, &ft, &ft) != 0)) {
rv = ConvertWinError(GetLastError());
}
CloseHandle(file);
return rv;
}
NS_IMETHODIMP
nsLocalFile::GetPermissions(uint32_t* aPermissions) {
if (NS_WARN_IF(!aPermissions)) {
return NS_ERROR_INVALID_ARG;
}
// get the permissions of the target as determined by mFollowSymlinks
// If true, then this will be for the target of the shortcut file,
// otherwise it will be for the shortcut file itself (i.e. the same
// results as GetPermissionsOfLink)
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
bool isWritable = false;
rv = IsWritable(&isWritable);
if (NS_FAILED(rv)) {
return rv;
}
bool isExecutable = false;
rv = IsExecutable(&isExecutable);
if (NS_FAILED(rv)) {
return rv;
}
*aPermissions = PR_IRUSR | PR_IRGRP | PR_IROTH; // all read
if (isWritable) {
*aPermissions |= PR_IWUSR | PR_IWGRP | PR_IWOTH; // all write
}
if (isExecutable) {
*aPermissions |= PR_IXUSR | PR_IXGRP | PR_IXOTH; // all execute
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPermissionsOfLink(uint32_t* aPermissions) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aPermissions)) {
return NS_ERROR_INVALID_ARG;
}
// The caller is assumed to have already called IsSymlink
// and to have found that this file is a link. It is not
// possible for a link file to be executable.
DWORD word = ::GetFileAttributesW(mWorkingPath.get());
if (word == INVALID_FILE_ATTRIBUTES) {
return NS_ERROR_FILE_INVALID_PATH;
}
bool isWritable = !(word & FILE_ATTRIBUTE_READONLY);
*aPermissions = PR_IRUSR | PR_IRGRP | PR_IROTH; // all read
if (isWritable) {
*aPermissions |= PR_IWUSR | PR_IWGRP | PR_IWOTH; // all write
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetPermissions(uint32_t aPermissions) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
// set the permissions of the target as determined by mFollowSymlinks
// If true, then this will be for the target of the shortcut file,
// otherwise it will be for the shortcut file itself (i.e. the same
// results as SetPermissionsOfLink)
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
// windows only knows about the following permissions
int mode = 0;
if (aPermissions & (PR_IRUSR | PR_IRGRP | PR_IROTH)) { // any read
mode |= _S_IREAD;
}
if (aPermissions & (PR_IWUSR | PR_IWGRP | PR_IWOTH)) { // any write
mode |= _S_IWRITE;
}
if (_wchmod(mResolvedPath.get(), mode) == -1) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetPermissionsOfLink(uint32_t aPermissions) {
// The caller is assumed to have already called IsSymlink
// and to have found that this file is a link.
// windows only knows about the following permissions
int mode = 0;
if (aPermissions & (PR_IRUSR | PR_IRGRP | PR_IROTH)) { // any read
mode |= _S_IREAD;
}
if (aPermissions & (PR_IWUSR | PR_IWGRP | PR_IWOTH)) { // any write
mode |= _S_IWRITE;
}
if (_wchmod(mWorkingPath.get(), mode) == -1) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetFileSize(int64_t* aFileSize) {
if (NS_WARN_IF(!aFileSize)) {
return NS_ERROR_INVALID_ARG;
}
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
*aFileSize = mFileInfo64.size;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetFileSizeOfLink(int64_t* aFileSize) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aFileSize)) {
return NS_ERROR_INVALID_ARG;
}
// The caller is assumed to have already called IsSymlink
// and to have found that this file is a link.
PRFileInfo64 info;
if (NS_FAILED(GetFileInfo(mWorkingPath, &info))) {
return NS_ERROR_FILE_INVALID_PATH;
}
*aFileSize = info.size;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFileSize(int64_t aFileSize) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
HANDLE hFile =
::CreateFileW(mResolvedPath.get(), // pointer to name of the file
GENERIC_WRITE, // access (write) mode
FILE_SHARE_READ, // share mode
nullptr, // pointer to security attributes
OPEN_EXISTING, // how to create
FILE_ATTRIBUTE_NORMAL, // file attributes
nullptr);
if (hFile == INVALID_HANDLE_VALUE) {
return ConvertWinError(GetLastError());
}
// seek the file pointer to the new, desired end of file
// and then truncate the file at that position
rv = NS_ERROR_FAILURE;
aFileSize = MyFileSeek64(hFile, aFileSize, FILE_BEGIN);
if (aFileSize != -1 && SetEndOfFile(hFile)) {
MakeDirty();
rv = NS_OK;
}
CloseHandle(hFile);
return rv;
}
NS_IMETHODIMP
nsLocalFile::GetDiskSpaceAvailable(int64_t* aDiskSpaceAvailable) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aDiskSpaceAvailable)) {
return NS_ERROR_INVALID_ARG;
}
ResolveAndStat();
if (mFileInfo64.type == PR_FILE_FILE) {
// Since GetDiskFreeSpaceExW works only on directories, use the parent.
nsCOMPtr<nsIFile> parent;
if (NS_SUCCEEDED(GetParent(getter_AddRefs(parent))) && parent) {
return parent->GetDiskSpaceAvailable(aDiskSpaceAvailable);
}
}
ULARGE_INTEGER liFreeBytesAvailableToCaller, liTotalNumberOfBytes;
if (::GetDiskFreeSpaceExW(mResolvedPath.get(), &liFreeBytesAvailableToCaller,
&liTotalNumberOfBytes, nullptr)) {
*aDiskSpaceAvailable = liFreeBytesAvailableToCaller.QuadPart;
return NS_OK;
}
*aDiskSpaceAvailable = 0;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetParent(nsIFile** aParent) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aParent)) {
return NS_ERROR_INVALID_ARG;
}
// A two-character path must be a drive such as C:, so it has no parent
if (mWorkingPath.Length() == 2) {
*aParent = nullptr;
return NS_OK;
}
int32_t offset = mWorkingPath.RFindChar(char16_t('\\'));
// adding this offset check that was removed in bug 241708 fixes mail
// directories that aren't relative to/underneath the profile dir.
// e.g., on a different drive. Before you remove them, please make
// sure local mail directories that aren't underneath the profile dir work.
if (offset == kNotFound) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
// A path of the form \\NAME is a top-level path and has no parent
if (offset == 1 && mWorkingPath[0] == L'\\') {
*aParent = nullptr;
return NS_OK;
}
nsAutoString parentPath(mWorkingPath);
if (offset > 0) {
parentPath.Truncate(offset);
} else {
parentPath.AssignLiteral("\\\\.");
}
nsCOMPtr<nsIFile> localFile;
nsresult rv =
NS_NewLocalFile(parentPath, mFollowSymlinks, getter_AddRefs(localFile));
if (NS_FAILED(rv)) {
return rv;
}
localFile.forget(aParent);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Exists(bool* aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
*aResult = false;
MakeDirty();
nsresult rv = ResolveAndStat();
*aResult = NS_SUCCEEDED(rv) || rv == NS_ERROR_FILE_IS_LOCKED;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsWritable(bool* aIsWritable) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
// The read-only attribute on a FAT directory only means that it can't
// be deleted. It is still possible to modify the contents of the directory.
nsresult rv = IsDirectory(aIsWritable);
if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
*aIsWritable = true;
return NS_OK;
} else if (rv == NS_ERROR_FILE_IS_LOCKED) {
// If the file is normally allowed write access
// we should still return that the file is writable.
} else if (NS_FAILED(rv)) {
return rv;
}
if (*aIsWritable) {
return NS_OK;
}
// writable if the file doesn't have the readonly attribute
rv = HasFileAttribute(FILE_ATTRIBUTE_READONLY, aIsWritable);
if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
*aIsWritable = false;
return NS_OK;
} else if (rv == NS_ERROR_FILE_IS_LOCKED) {
// If the file is normally allowed write access
// we should still return that the file is writable.
} else if (NS_FAILED(rv)) {
return rv;
}
*aIsWritable = !*aIsWritable;
// If the read only attribute is not set, check to make sure
// we can open the file with write access.
if (*aIsWritable) {
PRFileDesc* file;
rv = OpenFile(mResolvedPath, PR_WRONLY, 0, false, &file);
if (NS_SUCCEEDED(rv)) {
PR_Close(file);
} else if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
*aIsWritable = false;
} else if (rv == NS_ERROR_FILE_IS_LOCKED) {
// If it is locked and read only we would have
// gotten access denied
*aIsWritable = true;
} else {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsReadable(bool* aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
*aResult = false;
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
*aResult = true;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsExecutable(bool* aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
*aResult = false;
nsresult rv;
// only files can be executables
bool isFile;
rv = IsFile(&isFile);
if (NS_FAILED(rv)) {
return rv;
}
if (!isFile) {
return NS_OK;
}
// TODO: shouldn't we be checking mFollowSymlinks here?
bool symLink = false;
rv = IsSymlink(&symLink);
if (NS_FAILED(rv)) {
return rv;
}
nsAutoString path;
if (symLink) {
GetTarget(path);
} else {
GetPath(path);
}
// kill trailing dots and spaces.
int32_t filePathLen = path.Length() - 1;
while (filePathLen > 0 &&
(path[filePathLen] == L' ' || path[filePathLen] == L'.')) {
path.Truncate(filePathLen--);
}
// Get extension.
int32_t dotIdx = path.RFindChar(char16_t('.'));
if (dotIdx != kNotFound) {
// Convert extension to lower case.
char16_t* p = path.BeginWriting();
for (p += dotIdx + 1; *p; ++p) {
*p += (*p >= L'A' && *p <= L'Z') ? 'a' - 'A' : 0;
}
nsDependentSubstring ext = Substring(path, dotIdx);
for (size_t i = 0; i < ArrayLength(sExecutableExts); ++i) {
if (ext.EqualsASCII(sExecutableExts[i])) {
// Found a match. Set result and quit.
*aResult = true;
break;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsDirectory(bool* aResult) {
return HasFileAttribute(FILE_ATTRIBUTE_DIRECTORY, aResult);
}
NS_IMETHODIMP
nsLocalFile::IsFile(bool* aResult) {
nsresult rv = HasFileAttribute(FILE_ATTRIBUTE_DIRECTORY, aResult);
if (NS_SUCCEEDED(rv)) {
*aResult = !*aResult;
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::IsHidden(bool* aResult) {
return HasFileAttribute(FILE_ATTRIBUTE_HIDDEN, aResult);
}
nsresult nsLocalFile::HasFileAttribute(DWORD aFileAttrib, bool* aResult) {
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
DWORD attributes = GetFileAttributesW(mResolvedPath.get());
if (INVALID_FILE_ATTRIBUTES == attributes) {
return ConvertWinError(GetLastError());
}
*aResult = ((attributes & aFileAttrib) != 0);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsSymlink(bool* aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
// unless it is a valid shortcut path it's not a symlink
if (!IsShortcutPath(mWorkingPath)) {
*aResult = false;
return NS_OK;
}
// we need to know if this is a file or directory
nsresult rv = ResolveAndStat();
if (NS_FAILED(rv)) {
return rv;
}
// We should not check mFileInfo64.type here for PR_FILE_FILE because lnk
// files can point to directories or files. Important security checks
// depend on correctly identifying lnk files. mFileInfo64 now holds info
// about the target of the lnk file, not the actual lnk file!
*aResult = true;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::IsSpecial(bool* aResult) {
return HasFileAttribute(FILE_ATTRIBUTE_SYSTEM, aResult);
}
NS_IMETHODIMP
nsLocalFile::Equals(nsIFile* aInFile, bool* aResult) {
if (NS_WARN_IF(!aInFile)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
EnsureShortPath();
nsCOMPtr<nsILocalFileWin> lf(do_QueryInterface(aInFile));
if (!lf) {
*aResult = false;
return NS_OK;
}
nsAutoString inFilePath;
lf->GetCanonicalPath(inFilePath);
// Ok : Win9x
*aResult = _wcsicmp(mShortWorkingPath.get(), inFilePath.get()) == 0;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Contains(nsIFile* aInFile, bool* aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
*aResult = false;
nsAutoString myFilePath;
if (NS_FAILED(GetTarget(myFilePath))) {
GetPath(myFilePath);
}
uint32_t myFilePathLen = myFilePath.Length();
nsAutoString inFilePath;
if (NS_FAILED(aInFile->GetTarget(inFilePath))) {
aInFile->GetPath(inFilePath);
}
// make sure that the |aInFile|'s path has a trailing separator.
if (inFilePath.Length() >= myFilePathLen &&
inFilePath[myFilePathLen] == L'\\') {
if (_wcsnicmp(myFilePath.get(), inFilePath.get(), myFilePathLen) == 0) {
*aResult = true;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetTarget(nsAString& aResult) {
aResult.Truncate();
Resolve();
aResult = mResolvedPath;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetFollowLinks(bool* aFollowLinks) {
*aFollowLinks = mFollowSymlinks;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFollowLinks(bool aFollowLinks) {
MakeDirty();
mFollowSymlinks = aFollowLinks;
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetDirectoryEntriesImpl(nsIDirectoryEnumerator** aEntries) {
nsresult rv;
*aEntries = nullptr;
if (mWorkingPath.EqualsLiteral("\\\\.")) {
RefPtr<nsDriveEnumerator> drives = new nsDriveEnumerator;
rv = drives->Init();
if (NS_FAILED(rv)) {
return rv;
}
drives.forget(aEntries);
return NS_OK;
}
RefPtr<nsDirEnumerator> dirEnum = new nsDirEnumerator();
rv = dirEnum->Init(this);
if (NS_FAILED(rv)) {
return rv;
}
dirEnum.forget(aEntries);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::GetPersistentDescriptor(nsACString& aPersistentDescriptor) {
CopyUTF16toUTF8(mWorkingPath, aPersistentDescriptor);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetPersistentDescriptor(const nsACString& aPersistentDescriptor) {
if (IsUtf8(aPersistentDescriptor)) {
return InitWithPath(NS_ConvertUTF8toUTF16(aPersistentDescriptor));
} else {
return InitWithNativePath(aPersistentDescriptor);
}
}
NS_IMETHODIMP
nsLocalFile::GetFileAttributesWin(uint32_t* aAttribs) {
*aAttribs = 0;
DWORD dwAttrs = GetFileAttributesW(mWorkingPath.get());
if (dwAttrs == INVALID_FILE_ATTRIBUTES) {
return NS_ERROR_FILE_INVALID_PATH;
}
if (!(dwAttrs & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)) {
*aAttribs |= WFA_SEARCH_INDEXED;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetFileAttributesWin(uint32_t aAttribs) {
DWORD dwAttrs = GetFileAttributesW(mWorkingPath.get());
if (dwAttrs == INVALID_FILE_ATTRIBUTES) {
return NS_ERROR_FILE_INVALID_PATH;
}
if (aAttribs & WFA_SEARCH_INDEXED) {
dwAttrs &= ~FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
} else {
dwAttrs |= FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
}
if (aAttribs & WFA_READONLY) {
dwAttrs |= FILE_ATTRIBUTE_READONLY;
} else if ((aAttribs & WFA_READWRITE) &&
(dwAttrs & FILE_ATTRIBUTE_READONLY)) {
dwAttrs &= ~FILE_ATTRIBUTE_READONLY;
}
if (SetFileAttributesW(mWorkingPath.get(), dwAttrs) == 0) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::Reveal() {
// This API should be main thread only
MOZ_ASSERT(NS_IsMainThread());
// make sure mResolvedPath is set
nsresult rv = Resolve();
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND) {
return rv;
}
nsCOMPtr<nsIRunnable> task =
NS_NewRunnableFunction("nsLocalFile::Reveal", [path = mResolvedPath]() {
MOZ_ASSERT(!NS_IsMainThread(), "Don't run on the main thread");
bool doCoUninitialize = SUCCEEDED(CoInitializeEx(
nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE));
RevealFile(path);
if (doCoUninitialize) {
CoUninitialize();
}
});
return NS_DispatchBackgroundTask(task,
nsIEventTarget::DISPATCH_EVENT_MAY_BLOCK);
}
NS_IMETHODIMP
nsLocalFile::Launch() {
// This API should be main thread only
MOZ_ASSERT(NS_IsMainThread());
// make sure mResolvedPath is set
nsresult rv = Resolve();
if (NS_FAILED(rv)) {
return rv;
}
// use the app registry name to launch a shell execute....
_bstr_t execPath(mResolvedPath.get());
_variant_t args;
// Pass VT_ERROR/DISP_E_PARAMNOTFOUND to omit an optional RPC parameter
// to execute a file with the default verb.
_variant_t verbDefault(DISP_E_PARAMNOTFOUND, VT_ERROR);
_variant_t showCmd(SW_SHOWNORMAL);
// Use the directory of the file we're launching as the working
// directory. That way if we have a self extracting EXE it won't
// suggest to extract to the install directory.
wchar_t* workingDirectoryPtr = nullptr;
WCHAR workingDirectory[MAX_PATH + 1] = {L'\0'};
wcsncpy(workingDirectory, mResolvedPath.get(), MAX_PATH);
if (PathRemoveFileSpecW(workingDirectory)) {
workingDirectoryPtr = workingDirectory;
} else {
NS_WARNING("Could not set working directory for launched file.");
}
// Ask Explorer to ShellExecute on our behalf, as some applications such as
// Skype for Business do not start correctly when inheriting our process's
// migitation policies.
// It does not work in a special environment such as Citrix. In such a case
// we fall back to launching an application as a child process. We need to
// find a way to handle the combination of these interop issues.
mozilla::LauncherVoidResult shellExecuteOk = mozilla::ShellExecuteByExplorer(
execPath, args, verbDefault, workingDirectoryPtr, showCmd);
if (shellExecuteOk.isErr()) {
SHELLEXECUTEINFOW seinfo = {sizeof(SHELLEXECUTEINFOW)};
seinfo.fMask = SEE_MASK_ASYNCOK;
seinfo.hwnd = GetMostRecentNavigatorHWND();
seinfo.lpVerb = nullptr;
seinfo.lpFile = mResolvedPath.get();
seinfo.lpParameters = nullptr;
seinfo.lpDirectory = workingDirectoryPtr;
seinfo.nShow = SW_SHOWNORMAL;
if (!ShellExecuteExW(&seinfo)) {
return NS_ERROR_FILE_EXECUTION_FAILED;
}
}
return NS_OK;
}
nsresult NS_NewLocalFile(const nsAString& aPath, bool aFollowLinks,
nsIFile** aResult) {
RefPtr<nsLocalFile> file = new nsLocalFile();
file->SetFollowLinks(aFollowLinks);
if (!aPath.IsEmpty()) {
nsresult rv = file->InitWithPath(aPath);
if (NS_FAILED(rv)) {
return rv;
}
}
file.forget(aResult);
return NS_OK;
}
//-----------------------------------------------------------------------------
// Native (lossy) interface
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsLocalFile::InitWithNativePath(const nsACString& aFilePath) {
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aFilePath, tmp);
if (NS_SUCCEEDED(rv)) {
return InitWithPath(tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::AppendNative(const nsACString& aNode) {
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNode, tmp);
if (NS_SUCCEEDED(rv)) {
return Append(tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::AppendRelativeNativePath(const nsACString& aNode) {
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNode, tmp);
if (NS_SUCCEEDED(rv)) {
return AppendRelativePath(tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::GetNativeLeafName(nsACString& aLeafName) {
// NS_WARNING("This API is lossy. Use GetLeafName !");
nsAutoString tmp;
nsresult rv = GetLeafName(tmp);
if (NS_SUCCEEDED(rv)) {
rv = NS_CopyUnicodeToNative(tmp, aLeafName);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::SetNativeLeafName(const nsACString& aLeafName) {
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aLeafName, tmp);
if (NS_SUCCEEDED(rv)) {
return SetLeafName(tmp);
}
return rv;
}
nsString nsLocalFile::NativePath() { return mWorkingPath; }
nsCString nsIFile::HumanReadablePath() {
nsString path;
DebugOnly<nsresult> rv = GetPath(path);
MOZ_ASSERT(NS_SUCCEEDED(rv));
return NS_ConvertUTF16toUTF8(path);
}
NS_IMETHODIMP
nsLocalFile::GetNativeCanonicalPath(nsACString& aResult) {
NS_WARNING("This method is lossy. Use GetCanonicalPath !");
EnsureShortPath();
NS_CopyUnicodeToNative(mShortWorkingPath, aResult);
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::CopyToNative(nsIFile* aNewParentDir, const nsACString& aNewName) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (aNewName.IsEmpty()) {
return CopyTo(aNewParentDir, EmptyString());
}
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNewName, tmp);
if (NS_SUCCEEDED(rv)) {
return CopyTo(aNewParentDir, tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::CopyToFollowingLinksNative(nsIFile* aNewParentDir,
const nsACString& aNewName) {
if (aNewName.IsEmpty()) {
return CopyToFollowingLinks(aNewParentDir, EmptyString());
}
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNewName, tmp);
if (NS_SUCCEEDED(rv)) {
return CopyToFollowingLinks(aNewParentDir, tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::MoveToNative(nsIFile* aNewParentDir, const nsACString& aNewName) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
if (aNewName.IsEmpty()) {
return MoveTo(aNewParentDir, EmptyString());
}
nsAutoString tmp;
nsresult rv = NS_CopyNativeToUnicode(aNewName, tmp);
if (NS_SUCCEEDED(rv)) {
return MoveTo(aNewParentDir, tmp);
}
return rv;
}
NS_IMETHODIMP
nsLocalFile::GetNativeTarget(nsACString& aResult) {
// Check we are correctly initialized.
CHECK_mWorkingPath();
NS_WARNING("This API is lossy. Use GetTarget !");
nsAutoString tmp;
nsresult rv = GetTarget(tmp);
if (NS_SUCCEEDED(rv)) {
rv = NS_CopyUnicodeToNative(tmp, aResult);
}
return rv;
}
nsresult NS_NewNativeLocalFile(const nsACString& aPath, bool aFollowLinks,
nsIFile** aResult) {
nsAutoString buf;
nsresult rv = NS_CopyNativeToUnicode(aPath, buf);
if (NS_FAILED(rv)) {
*aResult = nullptr;
return rv;
}
return NS_NewLocalFile(buf, aFollowLinks, aResult);
}
void nsLocalFile::EnsureShortPath() {
if (!mShortWorkingPath.IsEmpty()) {
return;
}
WCHAR shortPath[MAX_PATH + 1];
DWORD lengthNeeded = ::GetShortPathNameW(mWorkingPath.get(), shortPath,
ArrayLength(shortPath));
// If an error occurred then lengthNeeded is set to 0 or the length of the
// needed buffer including null termination. If it succeeds the number of
// wide characters not including null termination is returned.
if (lengthNeeded != 0 && lengthNeeded < ArrayLength(shortPath)) {
mShortWorkingPath.Assign(shortPath);
} else {
mShortWorkingPath.Assign(mWorkingPath);
}
}
NS_IMPL_ISUPPORTS_INHERITED(nsDriveEnumerator, nsSimpleEnumerator,
nsIDirectoryEnumerator)
nsDriveEnumerator::nsDriveEnumerator() {}
nsDriveEnumerator::~nsDriveEnumerator() {}
nsresult nsDriveEnumerator::Init() {
/* If the length passed to GetLogicalDriveStrings is smaller
* than the length of the string it would return, it returns
* the length required for the string. */
DWORD length = GetLogicalDriveStringsW(0, 0);
/* The string is null terminated */
if (!mDrives.SetLength(length + 1, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (!GetLogicalDriveStringsW(length, mDrives.get())) {
return NS_ERROR_FAILURE;
}
mDrives.BeginReading(mStartOfCurrentDrive);
mDrives.EndReading(mEndOfDrivesString);
return NS_OK;
}
NS_IMETHODIMP
nsDriveEnumerator::HasMoreElements(bool* aHasMore) {
*aHasMore = *mStartOfCurrentDrive != L'\0';
return NS_OK;
}
NS_IMETHODIMP
nsDriveEnumerator::GetNext(nsISupports** aNext) {
/* GetLogicalDrives stored in mDrives is a concatenation
* of null terminated strings, followed by a null terminator.
* mStartOfCurrentDrive is an iterator pointing at the first
* character of the current drive. */
if (*mStartOfCurrentDrive == L'\0') {
*aNext = nullptr;
return NS_ERROR_FAILURE;
}
nsAString::const_iterator driveEnd = mStartOfCurrentDrive;
FindCharInReadable(L'\0', driveEnd, mEndOfDrivesString);
nsString drive(Substring(mStartOfCurrentDrive, driveEnd));
mStartOfCurrentDrive = ++driveEnd;
nsIFile* file;
nsresult rv = NS_NewLocalFile(drive, false, &file);
*aNext = file;
return rv;
}
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