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/**
* @file win32/fs.cpp
* @brief Win32 filesystem/directory access/notification
*
* (c) 2013 by Mega Limited, Auckland, New Zealand
*
* This file is part of the MEGA SDK - Client Access Engine.
*
* Applications using the MEGA API must present a valid application key
* and comply with the the rules set forth in the Terms of Service.
*
* The MEGA SDK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* @copyright Simplified (2-clause) BSD License.
*
* You should have received a copy of the license along with this
* program.
*/
#include "mega.h"
#include <wow64apiset.h>
namespace mega {
std::string gWindowsSeparator((const char*)(const wchar_t*)L"\\", 2);
WinFileAccess::WinFileAccess(Waiter *w) : FileAccess(w)
{
hFile = INVALID_HANDLE_VALUE;
hFind = INVALID_HANDLE_VALUE;
fsidvalid = false;
}
WinFileAccess::~WinFileAccess()
{
if (hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(hFile);
assert(hFind == INVALID_HANDLE_VALUE);
}
else if (hFind != INVALID_HANDLE_VALUE)
{
FindClose(hFind);
}
}
bool WinFileAccess::sysread(byte* dst, unsigned len, m_off_t pos)
{
DWORD dwRead;
assert(hFile != INVALID_HANDLE_VALUE);
if (!SetFilePointerEx(hFile, *(LARGE_INTEGER*)&pos, NULL, FILE_BEGIN))
{
DWORD e = GetLastError();
retry = WinFileSystemAccess::istransient(e);
LOG_err << "SetFilePointerEx failed for reading. Error: " << e;
return false;
}
if (!ReadFile(hFile, (LPVOID)dst, (DWORD)len, &dwRead, NULL))
{
DWORD e = GetLastError();
retry = WinFileSystemAccess::istransient(e);
LOG_err << "ReadFile failed. Error: " << e;
return false;
}
if (dwRead != len)
{
retry = false;
LOG_err << "ReadFile failed (dwRead) " << dwRead << " - " << len;
return false;
}
return true;
}
bool WinFileAccess::fwrite(const byte* data, unsigned len, m_off_t pos)
{
DWORD dwWritten;
if (!SetFilePointerEx(hFile, *(LARGE_INTEGER*)&pos, NULL, FILE_BEGIN))
{
DWORD e = GetLastError();
retry = WinFileSystemAccess::istransient(e);
LOG_err << "SetFilePointerEx failed for writing. Error: " << e;
return false;
}
if (!WriteFile(hFile, (LPCVOID)data, (DWORD)len, &dwWritten, NULL))
{
DWORD e = GetLastError();
retry = WinFileSystemAccess::istransient(e);
LOG_err << "WriteFile failed. Error: " << e;
return false;
}
if (dwWritten != len)
{
retry = false;
LOG_err << "WriteFile failed (dwWritten) " << dwWritten << " - " << len;
return false;
}
if (!FlushFileBuffers(hFile))
{
DWORD e = GetLastError();
retry = WinFileSystemAccess::istransient(e);
LOG_err << "FlushFileBuffers failed. Error: " << e;
return false;
}
return true;
}
m_time_t FileTime_to_POSIX(FILETIME* ft)
{
LARGE_INTEGER date;
date.HighPart = ft->dwHighDateTime;
date.LowPart = ft->dwLowDateTime;
// remove the diff between 1970 and 1601 and convert back from 100-nanoseconds to seconds
int64_t t = date.QuadPart - 11644473600000 * 10000;
// clamp
if (t < 0) return 0;
t /= 10000000;
FileSystemAccess::captimestamp(&t);
return t;
}
bool WinFileAccess::sysstat(m_time_t* mtime, m_off_t* size)
{
assert(!nonblocking_localname.empty());
WIN32_FILE_ATTRIBUTE_DATA fad;
type = TYPE_UNKNOWN;
if (!GetFileAttributesExW((LPCWSTR)nonblocking_localname.editStringDirect()->data(), GetFileExInfoStandard, (LPVOID)&fad))
{
DWORD e = GetLastError();
errorcode = e;
retry = WinFileSystemAccess::istransient(e);
return false;
}
errorcode = 0;
if (SimpleLogger::logCurrentLevel >= logDebug && skipattributes(fad.dwFileAttributes))
{
WinFileSystemAccess wfsa;
LOG_debug << "Incompatible attributes (" << fad.dwFileAttributes << ") for file " << nonblocking_localname.toPath(wfsa);
}
if (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
type = FOLDERNODE;
retry = false;
return false;
}
retry = false;
type = FILENODE;
*mtime = FileTime_to_POSIX(&fad.ftLastWriteTime);
*size = ((m_off_t)fad.nFileSizeHigh << 32) + (m_off_t)fad.nFileSizeLow;
return true;
}
bool WinFileAccess::sysopen(bool async)
{
assert(hFile == INVALID_HANDLE_VALUE);
assert(!nonblocking_localname.empty());
if (hFile != INVALID_HANDLE_VALUE)
{
sysclose();
}
#ifdef WINDOWS_PHONE
hFile = CreateFile2((LPCWSTR)localname.data(), GENERIC_READ,
FILE_SHARE_WRITE | FILE_SHARE_READ,
OPEN_EXISTING, NULL);
#else
hFile = CreateFileW((LPCWSTR)nonblocking_localname.editStringDirect()->data(), GENERIC_READ,
FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, OPEN_EXISTING, async ? FILE_FLAG_OVERLAPPED : 0, NULL);
#endif
if (hFile == INVALID_HANDLE_VALUE)
{
DWORD e = GetLastError();
LOG_debug << "Unable to open file (sysopen). Error code: " << e;
retry = WinFileSystemAccess::istransient(e);
return false;
}
return true;
}
void WinFileAccess::sysclose()
{
assert(!nonblocking_localname.empty());
assert(hFile != INVALID_HANDLE_VALUE);
if (hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(hFile);
hFile = INVALID_HANDLE_VALUE;
}
}
#ifndef WINDOWS_PHONE
WinAsyncIOContext::WinAsyncIOContext() : AsyncIOContext()
{
overlapped = NULL;
}
WinAsyncIOContext::~WinAsyncIOContext()
{
LOG_verbose << "Deleting WinAsyncIOContext";
finish();
}
void WinAsyncIOContext::finish()
{
if (overlapped)
{
if (!finished)
{
LOG_debug << "Synchronously waiting for async operation";
AsyncIOContext::finish();
}
delete overlapped;
overlapped = NULL;
}
assert(finished);
}
AsyncIOContext *WinFileAccess::newasynccontext()
{
return new WinAsyncIOContext();
}
VOID WinFileAccess::asyncopfinished(DWORD dwErrorCode, DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped)
{
WinAsyncIOContext *context = (WinAsyncIOContext *)(lpOverlapped->hEvent);
context->failed = dwErrorCode || dwNumberOfBytesTransfered != context->len;
if (!context->failed)
{
if (context->op == AsyncIOContext::READ)
{
memset((void *)(((char *)(context->buffer)) + context->len), 0, context->pad);
LOG_verbose << "Async read finished OK";
}
else
{
LOG_verbose << "Async write finished OK";
}
}
else
{
LOG_warn << "Async operation finished with error: " << dwErrorCode;
}
context->retry = WinFileSystemAccess::istransient(dwErrorCode);
context->finished = true;
if (context->userCallback)
{
context->userCallback(context->userData);
}
}
#endif
bool WinFileAccess::asyncavailable()
{
#ifdef WINDOWS_PHONE
return false;
#endif
return true;
}
void WinFileAccess::asyncsysopen(AsyncIOContext *context)
{
#ifndef WINDOWS_PHONE
auto path = LocalPath::fromLocalname(string((char *)context->buffer, context->len));
bool read = context->access & AsyncIOContext::ACCESS_READ;
bool write = context->access & AsyncIOContext::ACCESS_WRITE;
context->failed = !fopen_impl(path, read, write, true, nullptr, false);
context->retry = retry;
context->finished = true;
if (context->userCallback)
{
context->userCallback(context->userData);
}
#endif
}
void WinFileAccess::asyncsysread(AsyncIOContext *context)
{
#ifndef WINDOWS_PHONE
if (!context)
{
return;
}
WinAsyncIOContext *winContext = dynamic_cast<WinAsyncIOContext*>(context);
if (!winContext)
{
context->failed = true;
context->retry = false;
context->finished = true;
if (context->userCallback)
{
context->userCallback(context->userData);
}
return;
}
OVERLAPPED *overlapped = new OVERLAPPED;
memset(overlapped, 0, sizeof (OVERLAPPED));
overlapped->Offset = winContext->pos & 0xFFFFFFFF;
overlapped->OffsetHigh = (winContext->pos >> 32) & 0xFFFFFFFF;
overlapped->hEvent = winContext;
winContext->overlapped = overlapped;
if (!ReadFileEx(hFile, (LPVOID)winContext->buffer, (DWORD)winContext->len,
overlapped, asyncopfinished))
{
DWORD e = GetLastError();
winContext->retry = WinFileSystemAccess::istransient(e);
winContext->failed = true;
winContext->finished = true;
winContext->overlapped = NULL;
delete overlapped;
LOG_warn << "Async read failed at startup: " << e;
if (winContext->userCallback)
{
winContext->userCallback(winContext->userData);
}
}
#endif
}
void WinFileAccess::asyncsyswrite(AsyncIOContext *context)
{
#ifndef WINDOWS_PHONE
if (!context)
{
return;
}
WinAsyncIOContext *winContext = dynamic_cast<WinAsyncIOContext*>(context);
if (!winContext)
{
context->failed = true;
context->retry = false;
context->finished = true;
if (context->userCallback)
{
context->userCallback(context->userData);
}
return;
}
OVERLAPPED *overlapped = new OVERLAPPED;
memset(overlapped, 0, sizeof (OVERLAPPED));
overlapped->Offset = winContext->pos & 0xFFFFFFFF;
overlapped->OffsetHigh = (winContext->pos >> 32) & 0xFFFFFFFF;
overlapped->hEvent = winContext;
winContext->overlapped = overlapped;
if (!WriteFileEx(hFile, (LPVOID)winContext->buffer, (DWORD)winContext->len,
overlapped, asyncopfinished))
{
DWORD e = GetLastError();
winContext->retry = WinFileSystemAccess::istransient(e);
winContext->failed = true;
winContext->finished = true;
winContext->overlapped = NULL;
delete overlapped;
LOG_warn << "Async write failed at startup: " << e;
if (winContext->userCallback)
{
winContext->userCallback(winContext->userData);
}
}
#endif
}
// update local name
void WinFileAccess::updatelocalname(LocalPath& name)
{
if (!nonblocking_localname.empty())
{
nonblocking_localname = name;
WinFileSystemAccess::sanitizedriveletter(nonblocking_localname);
nonblocking_localname.editStringDirect()->append("", 1);
}
}
// true if attribute set should not be considered for syncing
// (SYSTEM files are only synced if they are not HIDDEN)
bool WinFileAccess::skipattributes(DWORD dwAttributes)
{
return (dwAttributes & (FILE_ATTRIBUTE_REPARSE_POINT
| FILE_ATTRIBUTE_OFFLINE))
|| (dwAttributes & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN))
== (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN);
}
// emulates Linux open-directory-as-file semantics
// FIXME #1: How to open files and directories with a single atomic
// CreateFile() operation without first looking at the attributes?
// FIXME #2: How to convert a CreateFile()-opened directory directly to a hFind
// without doing a FindFirstFile()?
bool WinFileAccess::fopen(LocalPath& name, bool read, bool write, DirAccess* iteratingDir, bool ignoreAttributes)
{
return fopen_impl(name, read, write, false, iteratingDir, ignoreAttributes);
}
bool WinFileAccess::fopen_impl(LocalPath& namePath, bool read, bool write, bool async, DirAccess* iteratingDir, bool ignoreAttributes)
{
WIN32_FIND_DATA fad = { 0 };
assert(hFile == INVALID_HANDLE_VALUE);
#ifdef WINDOWS_PHONE
FILE_ID_INFO bhfi = { 0 };
#else
BY_HANDLE_FILE_INFORMATION bhfi = { 0 };
#endif
bool skipcasecheck = false;
int added = WinFileSystemAccess::sanitizedriveletter(namePath);
string* name = namePath.editStringDirect();
name->append("", 1);
if (write)
{
type = FILENODE;
}
else
{
// fill in the `fad` file attribute data in the most efficient way available for its case
if (iteratingDir)
{
fad = static_cast<WinDirAccess*>(iteratingDir)->currentItemAttributes;
}
else
{
HANDLE h = name->size() > sizeof(wchar_t)
? FindFirstFileExW((LPCWSTR)name->data(), FindExInfoStandard, &fad,
FindExSearchNameMatch, NULL, 0)
: INVALID_HANDLE_VALUE;
if (h != INVALID_HANDLE_VALUE)
{
// success so `fad` is set
FindClose(h);
}
else
{
WIN32_FILE_ATTRIBUTE_DATA fatd;
if (!GetFileAttributesExW((LPCWSTR)name->data(), GetFileExInfoStandard, (LPVOID)&fatd))
{
DWORD e = GetLastError();
// this is an expected case so no need to log. the FindFirstFileEx did not find the file,
// GetFileAttributesEx is only expected to find it if it's a network share point
// LOG_debug << "Unable to get the attributes of the file. Error code: " << e;
retry = WinFileSystemAccess::istransient(e);
name->resize(name->size() - added - 1);
return false;
}
else
{
LOG_debug << "Possible root of network share";
skipcasecheck = true;
fad.dwFileAttributes = fatd.dwFileAttributes;
fad.ftCreationTime = fatd.ftCreationTime;
fad.ftLastAccessTime = fatd.ftLastAccessTime;
fad.ftLastWriteTime = fatd.ftLastWriteTime;
fad.nFileSizeHigh = fatd.nFileSizeHigh;
fad.nFileSizeLow = fatd.nFileSizeLow;
}
}
}
if (!skipcasecheck)
{
const char *filename = name->data() + name->size() - 1;
int filenamesize = 0;
bool separatorfound = false;
do {
filename -= sizeof(wchar_t);
filenamesize += sizeof(wchar_t);
separatorfound = !memcmp(L"\\", filename, sizeof(wchar_t)) || !memcmp(L"/", filename, sizeof(wchar_t)) || !memcmp(L":", filename, sizeof(wchar_t));
} while (filename > name->data() && !separatorfound);
if (filenamesize > sizeof(wchar_t) || !separatorfound)
{
if (separatorfound)
{
filename += sizeof(wchar_t);
}
else
{
filenamesize += sizeof(wchar_t);
}
if (memcmp(filename, fad.cFileName, filenamesize < sizeof(fad.cFileName) ? filenamesize : sizeof(fad.cFileName))
&& (filenamesize > sizeof(fad.cAlternateFileName) || memcmp(filename, fad.cAlternateFileName, filenamesize))
&& !((filenamesize == 4 && !memcmp(filename, L".", 4))
|| (filenamesize == 6 && !memcmp(filename, L"..", 6))))
{
LOG_warn << "fopen failed due to invalid case";
retry = false;
name->resize(name->size() - added - 1);
return false;
}
}
}
// ignore symlinks - they would otherwise be treated as moves
// also, ignore some other obscure filesystem object categories
if (!ignoreAttributes && skipattributes(fad.dwFileAttributes))
{
name->resize(name->size() - 1);
if (SimpleLogger::logCurrentLevel >= logDebug)
{
string excluded;
excluded.resize((name->size() + 1) * 4 / sizeof(wchar_t));
excluded.resize(WideCharToMultiByte(CP_UTF8, 0, (wchar_t*)name->data(),
int(name->size() / sizeof(wchar_t)),
(char*)excluded.data(),
int(excluded.size() + 1),
NULL, NULL));
LOG_debug << "Excluded: " << excluded << " Attributes: " << fad.dwFileAttributes;
}
retry = false;
return false;
}
type = (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? FOLDERNODE : FILENODE;
}
// (race condition between GetFileAttributesEx()/FindFirstFile() possible -
// fixable with the current Win32 API?)
#ifdef WINDOWS_PHONE
CREATEFILE2_EXTENDED_PARAMETERS ex = { 0 };
ex.dwSize = sizeof(ex);
if (type == FOLDERNODE)
{
ex.dwFileFlags = FILE_FLAG_BACKUP_SEMANTICS;
}
else if (async)
{
ex.dwFileFlags = FILE_FLAG_OVERLAPPED;
}
hFile = CreateFile2((LPCWSTR)name->data(),
read ? GENERIC_READ : (write ? GENERIC_WRITE : 0),
FILE_SHARE_WRITE | FILE_SHARE_READ,
!write ? OPEN_EXISTING : OPEN_ALWAYS,
&ex);
#else
hFile = CreateFileW((LPCWSTR)name->data(),
read ? GENERIC_READ : (write ? GENERIC_WRITE : 0),
FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL,
!write ? OPEN_EXISTING : OPEN_ALWAYS,
(type == FOLDERNODE) ? FILE_FLAG_BACKUP_SEMANTICS
: (async ? FILE_FLAG_OVERLAPPED : 0),
NULL);
#endif
name->resize(name->size() - added - 1);
// FIXME: verify that keeping the directory opened quashes the possibility
// of a race condition between CreateFile() and FindFirstFile()
if (hFile == INVALID_HANDLE_VALUE)
{
DWORD e = GetLastError();
LOG_debug << "Unable to open file. Error code: " << e;
retry = WinFileSystemAccess::istransient(e);
return false;
}
mtime = FileTime_to_POSIX(&fad.ftLastWriteTime);
#ifdef WINDOWS_PHONE
if (!write && (fsidvalid = !!GetFileInformationByHandleEx(hFile, FileIdInfo, &bhfi, sizeof(bhfi))))
{
fsid = *(handle*)&bhfi.FileId;
}
#else
if (!write && (fsidvalid = !!GetFileInformationByHandle(hFile, &bhfi)))
{
fsid = ((handle)bhfi.nFileIndexHigh << 32) | (handle)bhfi.nFileIndexLow;
}
#endif
if (type == FOLDERNODE)
{
ScopedLengthRestore undoStar(namePath);
namePath.appendWithSeparator(LocalPath::fromLocalname(std::string((const char*)(const wchar_t*)L"*", 2)), true, gWindowsSeparator);
string* searchName = namePath.editStringDirect();
searchName->append("", 1);
#ifdef WINDOWS_PHONE
hFind = FindFirstFileExW((LPCWSTR)searchName->data(), FindExInfoBasic, &ffd, FindExSearchNameMatch, NULL, 0);
#else
hFind = FindFirstFileW((LPCWSTR)searchName->data(), &ffd);
#endif
if (hFind == INVALID_HANDLE_VALUE)
{
DWORD e = GetLastError();
LOG_debug << "Unable to open folder. Error code: " << e;
retry = WinFileSystemAccess::istransient(e);
return false;
}
CloseHandle(hFile);
hFile = INVALID_HANDLE_VALUE;
retry = false;
return true;
}
if (!write)
{
size = ((m_off_t)fad.nFileSizeHigh << 32) + (m_off_t)fad.nFileSizeLow;
if (!size)
{
LOG_debug << "Zero-byte file. mtime: " << mtime << " ctime: " << FileTime_to_POSIX(&fad.ftCreationTime)
<< " attrs: " << fad.dwFileAttributes << " access: " << FileTime_to_POSIX(&fad.ftLastAccessTime);
}
}
return true;
}
WinFileSystemAccess::WinFileSystemAccess()
{
notifyerr = false;
notifyfailed = false;
localseparator.assign((const char*)(const wchar_t*)L"\\", sizeof(wchar_t));
}
WinFileSystemAccess::~WinFileSystemAccess()
{
assert(!dirnotifys.size());
}
// append \ to bare Windows drive letter paths
int WinFileSystemAccess::sanitizedriveletter(LocalPath& localpath)
{
if (localpath.editStringDirect()->size() > sizeof(wchar_t) && !memcmp(localpath.editStringDirect()->data() + localpath.editStringDirect()->size() - sizeof(wchar_t), (const char*)(const wchar_t*)L":", sizeof(wchar_t)))
{
localpath.editStringDirect()->append((const char*)(const wchar_t*)L"\\", sizeof(wchar_t));
return sizeof(wchar_t);
}
return 0;
}
bool WinFileSystemAccess::istransient(DWORD e)
{
return e == ERROR_ACCESS_DENIED
|| e == ERROR_TOO_MANY_OPEN_FILES
|| e == ERROR_NOT_ENOUGH_MEMORY
|| e == ERROR_OUTOFMEMORY
|| e == ERROR_WRITE_PROTECT
|| e == ERROR_LOCK_VIOLATION
|| e == ERROR_SHARING_VIOLATION;
}
bool WinFileSystemAccess::istransientorexists(DWORD e)
{
target_exists = e == ERROR_FILE_EXISTS || e == ERROR_ALREADY_EXISTS;
return istransient(e);
}
void WinFileSystemAccess::addevents(Waiter* w, int)
{
}
// generate unique local filename in the same fs as relatedpath
void WinFileSystemAccess::tmpnamelocal(LocalPath& localname) const
{
static unsigned tmpindex;
char buf[128];
sprintf(buf, ".getxfer.%lu.%u.mega", GetCurrentProcessId(), tmpindex++);
localname = LocalPath::fromName(buf, *this, FS_UNKNOWN);
}
// convert UTF-8 to Windows Unicode
void WinFileSystemAccess::path2local(const string* path, string* local) const
{
// make space for the worst case
local->resize((path->size() + 1) * sizeof(wchar_t));
int len = MultiByteToWideChar(CP_UTF8, 0,
path->c_str(),
-1,
(wchar_t*)local->data(),
int(local->size() / sizeof(wchar_t) + 1));
if (len)
{
// resize to actual result
local->resize(sizeof(wchar_t) * (len - 1));
}
else
{
local->clear();
}
}
// convert Windows Unicode to UTF-8
void WinFileSystemAccess::local2path(const string* local, string* path) const
{
path->resize((local->size() + 1) * 4 / sizeof(wchar_t));
path->resize(WideCharToMultiByte(CP_UTF8, 0, (wchar_t*)local->data(),
int(local->size() / sizeof(wchar_t)),
(char*)path->data(),
int(path->size() + 1),
NULL, NULL));
normalize(path);
}
// write short name of the last path component to sname
bool WinFileSystemAccess::getsname(LocalPath& namePath, LocalPath& snamePath) const
{
#ifdef WINDOWS_PHONE
return false;
#else
int r, rr;
string* name = namePath.editStringDirect();
string* sname = snamePath.editStringDirect();
name->append("", 1);
r = int(name->size() / sizeof(wchar_t) + 1);
sname->resize(r * sizeof(wchar_t));
rr = GetShortPathNameW((LPCWSTR)name->data(), (LPWSTR)sname->data(), r);
sname->resize(rr * sizeof(wchar_t));
if (rr >= r)
{
rr = GetShortPathNameW((LPCWSTR)name->data(), (LPWSTR)sname->data(), rr);
sname->resize(rr * sizeof(wchar_t));
}
name->resize(name->size() - 1);
if (!rr)
{
sname->clear();
return false;
}
// we are only interested in the path's last component
wchar_t* ptr;
if ((ptr = wcsrchr((wchar_t*)sname->data(), '\\')) || (ptr = wcsrchr((wchar_t*)sname->data(), ':')))
{
sname->erase(0, (char*)ptr - sname->data() + sizeof(wchar_t));
}
return sname->size();
#endif
}
// FIXME: if a folder rename fails because the target exists, do a top-down
// recursive copy/delete
bool WinFileSystemAccess::renamelocal(LocalPath& oldnamePath, LocalPath& newnamePath, bool replace)
{
string* oldname = oldnamePath.editStringDirect();
string* newname = newnamePath.editStringDirect();
oldname->append("", 1);
newname->append("", 1);
bool r = !!MoveFileExW((LPCWSTR)oldname->data(), (LPCWSTR)newname->data(), replace ? MOVEFILE_REPLACE_EXISTING : 0);
newname->resize(newname->size() - 1);
oldname->resize(oldname->size() - 1);
if (!r)
{
DWORD e = GetLastError();
if (SimpleLogger::logCurrentLevel >= logWarning && !skip_errorreport)
{
string utf8oldname;
client->fsaccess->local2path(oldname, &utf8oldname);
string utf8newname;
client->fsaccess->local2path(newname, &utf8newname);
LOG_warn << "Unable to move file: " << utf8oldname.c_str() << " to " << utf8newname.c_str() << ". Error code: " << e;
}
transient_error = istransientorexists(e);
}
return r;
}
bool WinFileSystemAccess::copylocal(LocalPath& oldnamePath, LocalPath& newnamePath, m_time_t)
{
string* oldname = oldnamePath.editStringDirect();
string* newname = newnamePath.editStringDirect();
oldname->append("", 1);
newname->append("", 1);
#ifdef WINDOWS_PHONE
bool r = SUCCEEDED(CopyFile2((LPCWSTR)oldname->data(), (LPCWSTR)newname->data(), NULL));
#else
bool r = !!CopyFileW((LPCWSTR)oldname->data(), (LPCWSTR)newname->data(), FALSE);
#endif
newname->resize(newname->size() - 1);
oldname->resize(oldname->size() - 1);
if (!r)
{
DWORD e = GetLastError();
LOG_debug << "Unable to copy file. Error code: " << e;
transient_error = istransientorexists(e);
}
return r;
}
bool WinFileSystemAccess::rmdirlocal(LocalPath& namePath)
{
string* name = namePath.editStringDirect();
name->append("", 1);
bool r = !!RemoveDirectoryW((LPCWSTR)name->data());
name->resize(name->size() - 1);
if (!r)
{
DWORD e = GetLastError();
LOG_debug << "Unable to delete folder. Error code: " << e;
transient_error = istransient(e);
}
return r;
}
bool WinFileSystemAccess::unlinklocal(LocalPath& namePath)
{
string* name = namePath.editStringDirect();
name->append("", 1);
bool r = !!DeleteFileW((LPCWSTR)name->data());
name->resize(name->size() - 1);
if (!r)
{
DWORD e = GetLastError();
LOG_debug << "Unable to delete file. Error code: " << e;
transient_error = istransient(e);
}
return r;
}
// delete all files and folders contained in the specified folder
// (does not recurse into mounted devices)
void WinFileSystemAccess::emptydirlocal(LocalPath& namePath, dev_t basedev)
{
HANDLE hDirectory, hFind;
dev_t currentdev;
int added = WinFileSystemAccess::sanitizedriveletter(namePath);
string* name = namePath.editStringDirect();
name->append("", 1);
WIN32_FILE_ATTRIBUTE_DATA fad;
if (!GetFileAttributesExW((LPCWSTR)name->data(), GetFileExInfoStandard, (LPVOID)&fad)
|| !(fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|| fad.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
{
// discard files and resparse points (links, etc.)
name->resize(name->size() - added - 1);
return;
}
#ifdef WINDOWS_PHONE
CREATEFILE2_EXTENDED_PARAMETERS ex = { 0 };
ex.dwSize = sizeof(ex);
ex.dwFileFlags = FILE_FLAG_BACKUP_SEMANTICS;
hDirectory = CreateFile2((LPCWSTR)name->data(), GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ,
OPEN_EXISTING, &ex);
#else
hDirectory = CreateFileW((LPCWSTR)name->data(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
#endif
name->resize(name->size() - added - 1);
if (hDirectory == INVALID_HANDLE_VALUE)
{
// discard not accessible folders
return;
}
#ifdef WINDOWS_PHONE
FILE_ID_INFO fi = { 0 };
if(!GetFileInformationByHandleEx(hDirectory, FileIdInfo, &fi, sizeof(fi)))
#else
BY_HANDLE_FILE_INFORMATION fi;
if (!GetFileInformationByHandle(hDirectory, &fi))
#endif
{
currentdev = 0;
}
else
{
#ifdef WINDOWS_PHONE
currentdev = fi.VolumeSerialNumber + 1;
#else
currentdev = fi.dwVolumeSerialNumber + 1;
#endif
}
CloseHandle(hDirectory);
if (basedev && currentdev != basedev)
{
// discard folders on different devices
return;
}
bool removed;
for (;;)
{
// iterate over children and delete
removed = false;
name->append((const char*)(const wchar_t*)L"\\*", 5);
WIN32_FIND_DATAW ffd;
#ifdef WINDOWS_PHONE
hFind = FindFirstFileExW((LPCWSTR)name->data(), FindExInfoBasic, &ffd, FindExSearchNameMatch, NULL, 0);
#else
hFind = FindFirstFileW((LPCWSTR)name->data(), &ffd);
#endif
name->resize(name->size() - 5);
if (hFind == INVALID_HANDLE_VALUE)
{
break;
}
bool morefiles = true;
while (morefiles)
{
if (!(ffd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
&& (!(ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|| *ffd.cFileName != '.'
|| (ffd.cFileName[1] && ((ffd.cFileName[1] != '.')
|| ffd.cFileName[2]))))
{
auto childname = LocalPath::fromLocalname(*name);
childname.appendWithSeparator(LocalPath::fromLocalname(std::string((char*)ffd.cFileName, sizeof(wchar_t) * wcslen(ffd.cFileName))), true, gWindowsSeparator);
if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
emptydirlocal(childname, currentdev);
childname.editStringDirect()->append("", 1);
removed |= !!RemoveDirectoryW((LPCWSTR)childname.editStringDirect()->data());
}
else
{
childname.editStringDirect()->append("", 1);
removed |= !!DeleteFileW((LPCWSTR)childname.editStringDirect()->data());
}
}
morefiles = FindNextFileW(hFind, &ffd);
}
FindClose(hFind);
if (!removed)
{
break;
}