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40 ****************************************************************************/
41
42 #define _POSIX_
43 #include "qplatformdefs.h"
44 #include "qabstractfileengine.h"
45 #include "private/qfsfileengine_p.h"
46 #include "qfilesystemengine_p.h"
47 #include <qdebug.h>
48
49 #include "qfile.h"
50 #include "qdir.h"
51 #include "private/qmutexpool_p.h"
52 #include "qvarlengtharray.h"
53 #include "qdatetime.h"
54 #include "qt_windows.h"
55
56 #if !defined(Q_OS_WINCE)
57 # include <sys/types.h>
58 # include <direct.h>
59 # include <winioctl.h>
60 #else
61 # include <types.h>
62 #endif
63 #include <objbase.h>
64 #include <shlobj.h>
65 #include <initguid.h>
66 #include <accctrl.h>
67 #include <ctype.h>
68 #include <limits.h>
69 #define SECURITY_WIN32
70 #include <security.h>
71
72 #ifndef PATH_MAX
73 #define PATH_MAX FILENAME_MAX
74 #endif
75
76 QT_BEGIN_NAMESPACE
77
78 #if !defined(Q_OS_WINCE)
isUncPath(const QString & path)79 static inline bool isUncPath(const QString &path)
80 {
81 // Starts with \\, but not \\.
82 return (path.startsWith(QLatin1String("\\\\"))
83 && path.size() > 2 && path.at(2) != QLatin1Char('.'));
84 }
85 #endif
86
87 /*!
88 \internal
89 */
longFileName(const QString & path)90 QString QFSFileEnginePrivate::longFileName(const QString &path)
91 {
92 if (path.startsWith(QLatin1String("\\\\.\\")))
93 return path;
94
95 QString absPath = QFileSystemEngine::nativeAbsoluteFilePath(path);
96 #if !defined(Q_OS_WINCE)
97 QString prefix = QLatin1String("\\\\?\\");
98 if (isUncPath(absPath)) {
99 prefix.append(QLatin1String("UNC\\")); // "\\\\?\\UNC\\"
100 absPath.remove(0, 2);
101 }
102 return prefix + absPath;
103 #else
104 return absPath;
105 #endif
106 }
107
108 /*
109 \internal
110 */
nativeOpen(QIODevice::OpenMode openMode)111 bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
112 {
113 Q_Q(QFSFileEngine);
114
115 // All files are opened in share mode (both read and write).
116 DWORD shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
117
118 int accessRights = 0;
119 if (openMode & QIODevice::ReadOnly)
120 accessRights |= GENERIC_READ;
121 if (openMode & QIODevice::WriteOnly)
122 accessRights |= GENERIC_WRITE;
123
124 SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
125
126 // WriteOnly can create files, ReadOnly cannot.
127 DWORD creationDisp = (openMode & QIODevice::WriteOnly) ? OPEN_ALWAYS : OPEN_EXISTING;
128 // Create the file handle.
129 fileHandle = CreateFile((const wchar_t*)fileEntry.nativeFilePath().utf16(),
130 accessRights,
131 shareMode,
132 &securityAtts,
133 creationDisp,
134 FILE_ATTRIBUTE_NORMAL,
135 NULL);
136
137 // Bail out on error.
138 if (fileHandle == INVALID_HANDLE_VALUE) {
139 q->setError(QFile::OpenError, qt_error_string());
140 return false;
141 }
142
143 // Truncate the file after successfully opening it if Truncate is passed.
144 if (openMode & QIODevice::Truncate)
145 q->setSize(0);
146
147 // Seek to the end when in Append mode.
148 if (openMode & QFile::Append) {
149 ::SetFilePointer(fileHandle, 0, 0, FILE_END);
150 }
151
152 return true;
153 }
154
155 /*
156 \internal
157 */
nativeClose()158 bool QFSFileEnginePrivate::nativeClose()
159 {
160 Q_Q(QFSFileEngine);
161 if (fh || fd != -1) {
162 // stdlib / stdio mode.
163 return closeFdFh();
164 }
165
166 // Windows native mode.
167 bool ok = true;
168
169 #ifndef Q_OS_WINCE
170 if (cachedFd != -1) {
171 if (::_close(cachedFd) && !::CloseHandle(fileHandle)) {
172 q->setError(QFile::UnspecifiedError, qt_error_string());
173 ok = false;
174 }
175
176 // System handle is closed with associated file descriptor.
177 fileHandle = INVALID_HANDLE_VALUE;
178 cachedFd = -1;
179
180 return ok;
181 }
182 #endif
183
184 if ((fileHandle == INVALID_HANDLE_VALUE || !::CloseHandle(fileHandle))) {
185 q->setError(QFile::UnspecifiedError, qt_error_string());
186 ok = false;
187 }
188 fileHandle = INVALID_HANDLE_VALUE;
189 return ok;
190 }
191
192 /*
193 \internal
194 */
nativeFlush()195 bool QFSFileEnginePrivate::nativeFlush()
196 {
197 if (fh) {
198 // Buffered stdlib mode.
199 return flushFh();
200 }
201 if (fd != -1) {
202 // Unbuffered stdio mode; always succeeds (no buffer).
203 return true;
204 }
205
206 // Windows native mode; flushing is
207 // unnecessary. FlushFileBuffers(), the equivalent of sync() or
208 // fsync() on Unix, does a low-level flush to the disk, and we
209 // don't expose an API for this.
210 return true;
211 }
212
213 /*
214 \internal
215 */
nativeSize() const216 qint64 QFSFileEnginePrivate::nativeSize() const
217 {
218 Q_Q(const QFSFileEngine);
219 QFSFileEngine *thatQ = const_cast<QFSFileEngine *>(q);
220
221 // ### Don't flush; for buffered files, we should get away with ftell.
222 thatQ->flush();
223
224 // Always retrive the current information
225 metaData.clearFlags(QFileSystemMetaData::SizeAttribute);
226 #if defined(Q_OS_WINCE)
227 // Buffered stdlib mode.
228 if (fh) {
229 QT_OFF_T oldPos = QT_FTELL(fh);
230 QT_FSEEK(fh, 0, SEEK_END);
231 qint64 fileSize = (qint64)QT_FTELL(fh);
232 QT_FSEEK(fh, oldPos, SEEK_SET);
233 if (fileSize == -1) {
234 fileSize = 0;
235 thatQ->setError(QFile::UnspecifiedError, qt_error_string(errno));
236 }
237 return fileSize;
238 }
239 if (fd != -1) {
240 thatQ->setError(QFile::UnspecifiedError, QLatin1String("Not implemented!"));
241 return 0;
242 }
243 #endif
244 bool filled = false;
245 if (fileHandle != INVALID_HANDLE_VALUE && openMode != QIODevice::NotOpen )
246 filled = QFileSystemEngine::fillMetaData(fileHandle, metaData,
247 QFileSystemMetaData::SizeAttribute);
248 else
249 filled = doStat(QFileSystemMetaData::SizeAttribute);
250
251 if (!filled) {
252 thatQ->setError(QFile::UnspecifiedError, qt_error_string(errno));
253 }
254 return metaData.size();
255 }
256
257 /*
258 \internal
259 */
nativePos() const260 qint64 QFSFileEnginePrivate::nativePos() const
261 {
262 Q_Q(const QFSFileEngine);
263 QFSFileEngine *thatQ = const_cast<QFSFileEngine *>(q);
264
265 if (fh || fd != -1) {
266 // stdlib / stido mode.
267 return posFdFh();
268 }
269
270 // Windows native mode.
271 if (fileHandle == INVALID_HANDLE_VALUE)
272 return 0;
273
274 #if !defined(Q_OS_WINCE)
275 LARGE_INTEGER currentFilePos;
276 LARGE_INTEGER offset;
277 offset.QuadPart = 0;
278 if (!::SetFilePointerEx(fileHandle, offset, ¤tFilePos, FILE_CURRENT)) {
279 thatQ->setError(QFile::UnspecifiedError, qt_error_string());
280 return 0;
281 }
282
283 return qint64(currentFilePos.QuadPart);
284 #else
285 LARGE_INTEGER filepos;
286 filepos.HighPart = 0;
287 DWORD newFilePointer = SetFilePointer(fileHandle, 0, &filepos.HighPart, FILE_CURRENT);
288 if (newFilePointer == 0xFFFFFFFF && GetLastError() != NO_ERROR) {
289 thatQ->setError(QFile::UnspecifiedError, qt_error_string());
290 return 0;
291 }
292
293 filepos.LowPart = newFilePointer;
294 return filepos.QuadPart;
295 #endif
296 }
297
298 /*
299 \internal
300 */
nativeSeek(qint64 pos)301 bool QFSFileEnginePrivate::nativeSeek(qint64 pos)
302 {
303 Q_Q(QFSFileEngine);
304
305 if (fh || fd != -1) {
306 // stdlib / stdio mode.
307 return seekFdFh(pos);
308 }
309
310 #if !defined(Q_OS_WINCE)
311 LARGE_INTEGER currentFilePos;
312 LARGE_INTEGER offset;
313 offset.QuadPart = pos;
314 if (!::SetFilePointerEx(fileHandle, offset, ¤tFilePos, FILE_BEGIN)) {
315 q->setError(QFile::UnspecifiedError, qt_error_string());
316 return false;
317 }
318
319 return true;
320 #else
321 DWORD newFilePointer;
322 LARGE_INTEGER *li = reinterpret_cast<LARGE_INTEGER*>(&pos);
323 newFilePointer = SetFilePointer(fileHandle, li->LowPart, &li->HighPart, FILE_BEGIN);
324 if (newFilePointer == 0xFFFFFFFF && GetLastError() != NO_ERROR) {
325 q->setError(QFile::PositionError, qt_error_string());
326 return false;
327 }
328
329 return true;
330 #endif
331 }
332
333 /*
334 \internal
335 */
nativeRead(char * data,qint64 maxlen)336 qint64 QFSFileEnginePrivate::nativeRead(char *data, qint64 maxlen)
337 {
338 Q_Q(QFSFileEngine);
339
340 if (fh || fd != -1) {
341 // stdio / stdlib mode.
342 if (fh && nativeIsSequential() && feof(fh)) {
343 q->setError(QFile::ReadError, qt_error_string(int(errno)));
344 return -1;
345 }
346
347 return readFdFh(data, maxlen);
348 }
349
350 // Windows native mode.
351 if (fileHandle == INVALID_HANDLE_VALUE)
352 return -1;
353
354 DWORD bytesToRead = DWORD(maxlen); // <- lossy
355
356 // Reading on Windows fails with ERROR_NO_SYSTEM_RESOURCES when
357 // the chunks are too large, so we limit the block size to 32MB.
358 static const DWORD maxBlockSize = 32 * 1024 * 1024;
359
360 qint64 totalRead = 0;
361 do {
362 DWORD blockSize = qMin<DWORD>(bytesToRead, maxBlockSize);
363 DWORD bytesRead;
364 if (!ReadFile(fileHandle, data + totalRead, blockSize, &bytesRead, NULL)) {
365 if (totalRead == 0) {
366 // Note: only return failure if the first ReadFile fails.
367 q->setError(QFile::ReadError, qt_error_string());
368 return -1;
369 }
370 break;
371 }
372 if (bytesRead == 0)
373 break;
374 totalRead += bytesRead;
375 bytesToRead -= bytesRead;
376 } while (totalRead < maxlen);
377 return qint64(totalRead);
378 }
379
380 /*
381 \internal
382 */
nativeReadLine(char * data,qint64 maxlen)383 qint64 QFSFileEnginePrivate::nativeReadLine(char *data, qint64 maxlen)
384 {
385 Q_Q(QFSFileEngine);
386
387 if (fh || fd != -1) {
388 // stdio / stdlib mode.
389 return readLineFdFh(data, maxlen);
390 }
391
392 // Windows native mode.
393 if (fileHandle == INVALID_HANDLE_VALUE)
394 return -1;
395
396 // ### No equivalent in Win32?
397 return q->QAbstractFileEngine::readLine(data, maxlen);
398 }
399
400 /*
401 \internal
402 */
nativeWrite(const char * data,qint64 len)403 qint64 QFSFileEnginePrivate::nativeWrite(const char *data, qint64 len)
404 {
405 Q_Q(QFSFileEngine);
406
407 if (fh || fd != -1) {
408 // stdio / stdlib mode.
409 return writeFdFh(data, len);
410 }
411
412 // Windows native mode.
413 if (fileHandle == INVALID_HANDLE_VALUE)
414 return -1;
415
416 qint64 bytesToWrite = DWORD(len); // <- lossy
417
418 // Writing on Windows fails with ERROR_NO_SYSTEM_RESOURCES when
419 // the chunks are too large, so we limit the block size to 32MB.
420 static const DWORD maxBlockSize = 32 * 1024 * 1024;
421
422 qint64 totalWritten = 0;
423 do {
424 DWORD blockSize = qMin<DWORD>(bytesToWrite, maxBlockSize);
425 DWORD bytesWritten;
426 if (!WriteFile(fileHandle, data + totalWritten, blockSize, &bytesWritten, NULL)) {
427 if (totalWritten == 0) {
428 // Note: Only return error if the first WriteFile failed.
429 q->setError(QFile::WriteError, qt_error_string());
430 return -1;
431 }
432 break;
433 }
434 if (bytesWritten == 0)
435 break;
436 totalWritten += bytesWritten;
437 bytesToWrite -= bytesWritten;
438 } while (totalWritten < len);
439 return qint64(totalWritten);
440 }
441
442 /*
443 \internal
444 */
nativeHandle() const445 int QFSFileEnginePrivate::nativeHandle() const
446 {
447 if (fh || fd != -1)
448 return fh ? QT_FILENO(fh) : fd;
449 #ifndef Q_OS_WINCE
450 if (cachedFd != -1)
451 return cachedFd;
452
453 int flags = 0;
454 if (openMode & QIODevice::Append)
455 flags |= _O_APPEND;
456 if (!(openMode & QIODevice::WriteOnly))
457 flags |= _O_RDONLY;
458 cachedFd = _open_osfhandle((intptr_t) fileHandle, flags);
459 return cachedFd;
460 #else
461 return -1;
462 #endif
463 }
464
465 /*
466 \internal
467 */
nativeIsSequential() const468 bool QFSFileEnginePrivate::nativeIsSequential() const
469 {
470 #if !defined(Q_OS_WINCE)
471 HANDLE handle = fileHandle;
472 if (fh || fd != -1)
473 handle = (HANDLE)_get_osfhandle(fh ? QT_FILENO(fh) : fd);
474 if (handle == INVALID_HANDLE_VALUE)
475 return false;
476
477 DWORD fileType = GetFileType(handle);
478 return (fileType == FILE_TYPE_CHAR)
479 || (fileType == FILE_TYPE_PIPE);
480 #else
481 return false;
482 #endif
483 }
484
remove()485 bool QFSFileEngine::remove()
486 {
487 Q_D(QFSFileEngine);
488 QSystemError error;
489 bool ret = QFileSystemEngine::removeFile(d->fileEntry, error);
490 if (!ret)
491 setError(QFile::RemoveError, error.toString());
492 return ret;
493 }
494
copy(const QString & copyName)495 bool QFSFileEngine::copy(const QString ©Name)
496 {
497 Q_D(QFSFileEngine);
498 QSystemError error;
499 bool ret = QFileSystemEngine::copyFile(d->fileEntry, QFileSystemEntry(copyName), error);
500 if (!ret)
501 setError(QFile::CopyError, error.toString());
502 return ret;
503 }
504
rename(const QString & newName)505 bool QFSFileEngine::rename(const QString &newName)
506 {
507 Q_D(QFSFileEngine);
508 QSystemError error;
509 bool ret = QFileSystemEngine::renameFile(d->fileEntry, QFileSystemEntry(newName), error);
510 if (!ret)
511 setError(QFile::RenameError, error.toString());
512 return ret;
513 }
514
mkdir(const QString & name,bool createParentDirectories) const515 bool QFSFileEngine::mkdir(const QString &name, bool createParentDirectories) const
516 {
517 return QFileSystemEngine::createDirectory(QFileSystemEntry(name), createParentDirectories);
518 }
519
rmdir(const QString & name,bool recurseParentDirectories) const520 bool QFSFileEngine::rmdir(const QString &name, bool recurseParentDirectories) const
521 {
522 return QFileSystemEngine::removeDirectory(QFileSystemEntry(name), recurseParentDirectories);
523 }
524
caseSensitive() const525 bool QFSFileEngine::caseSensitive() const
526 {
527 return false;
528 }
529
setCurrentPath(const QString & path)530 bool QFSFileEngine::setCurrentPath(const QString &path)
531 {
532 return QFileSystemEngine::setCurrentPath(QFileSystemEntry(path));
533 }
534
currentPath(const QString & fileName)535 QString QFSFileEngine::currentPath(const QString &fileName)
536 {
537 #if !defined(Q_OS_WINCE)
538 QString ret;
539 //if filename is a drive: then get the pwd of that drive
540 if (fileName.length() >= 2 &&
541 fileName.at(0).isLetter() && fileName.at(1) == QLatin1Char(':')) {
542 int drv = fileName.toUpper().at(0).toLatin1() - 'A' + 1;
543 if (_getdrive() != drv) {
544 wchar_t buf[PATH_MAX];
545 ::_wgetdcwd(drv, buf, PATH_MAX);
546 ret = QString::fromWCharArray(buf);
547 }
548 }
549 if (ret.isEmpty()) {
550 //just the pwd
551 ret = QFileSystemEngine::currentPath().filePath();
552 }
553 if (ret.length() >= 2 && ret[1] == QLatin1Char(':'))
554 ret[0] = ret.at(0).toUpper(); // Force uppercase drive letters.
555 return ret;
556 #else
557 Q_UNUSED(fileName);
558 return QFileSystemEngine::currentPath().filePath();
559 #endif
560 }
561
homePath()562 QString QFSFileEngine::homePath()
563 {
564 return QFileSystemEngine::homePath();
565 }
566
rootPath()567 QString QFSFileEngine::rootPath()
568 {
569 return QFileSystemEngine::rootPath();
570 }
571
tempPath()572 QString QFSFileEngine::tempPath()
573 {
574 return QFileSystemEngine::tempPath();
575 }
576
drives()577 QFileInfoList QFSFileEngine::drives()
578 {
579 QFileInfoList ret;
580 #if !defined(Q_OS_WINCE)
581 #if defined(Q_OS_WIN32)
582 quint32 driveBits = (quint32) GetLogicalDrives() & 0x3ffffff;
583 #elif defined(Q_OS_OS2EMX)
584 quint32 driveBits, cur;
585 if (DosQueryCurrentDisk(&cur, &driveBits) != NO_ERROR)
586 exit(1);
587 driveBits &= 0x3ffffff;
588 #endif
589 char driveName[] = "A:/";
590
591 while (driveBits) {
592 if (driveBits & 1)
593 ret.append(QFileInfo(QLatin1String(driveName)));
594 driveName[0]++;
595 driveBits = driveBits >> 1;
596 }
597 return ret;
598 #else
599 ret.append(QFileInfo(QLatin1String("/")));
600 return ret;
601 #endif
602 }
603
doStat(QFileSystemMetaData::MetaDataFlags flags) const604 bool QFSFileEnginePrivate::doStat(QFileSystemMetaData::MetaDataFlags flags) const
605 {
606 if (!tried_stat || !metaData.hasFlags(flags)) {
607 tried_stat = true;
608
609 #if !defined(Q_OS_WINCE)
610 int localFd = fd;
611 if (fh && fileEntry.isEmpty())
612 localFd = QT_FILENO(fh);
613 if (localFd != -1)
614 QFileSystemEngine::fillMetaData(localFd, metaData, flags);
615 #endif
616 if (metaData.missingFlags(flags) && !fileEntry.isEmpty())
617 QFileSystemEngine::fillMetaData(fileEntry, metaData, metaData.missingFlags(flags));
618 }
619
620 return metaData.exists();
621 }
622
623
link(const QString & newName)624 bool QFSFileEngine::link(const QString &newName)
625 {
626 #if !defined(Q_OS_WINCE)
627 #if !defined(QT_NO_LIBRARY) && !defined(Q_CC_MWERKS)
628 bool ret = false;
629
630 QString linkName = newName;
631 //### assume that they add .lnk
632
633 IShellLink *psl;
634 bool neededCoInit = false;
635
636 HRESULT hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void **)&psl);
637
638 if (hres == CO_E_NOTINITIALIZED) { // COM was not initialized
639 neededCoInit = true;
640 CoInitialize(NULL);
641 hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void **)&psl);
642 }
643
644 if (SUCCEEDED(hres)) {
645 hres = psl->SetPath((wchar_t *)fileName(AbsoluteName).replace(QLatin1Char('/'), QLatin1Char('\\')).utf16());
646 if (SUCCEEDED(hres)) {
647 hres = psl->SetWorkingDirectory((wchar_t *)fileName(AbsolutePathName).replace(QLatin1Char('/'), QLatin1Char('\\')).utf16());
648 if (SUCCEEDED(hres)) {
649 IPersistFile *ppf;
650 hres = psl->QueryInterface(IID_IPersistFile, (void **)&ppf);
651 if (SUCCEEDED(hres)) {
652 hres = ppf->Save((wchar_t*)linkName.utf16(), TRUE);
653 if (SUCCEEDED(hres))
654 ret = true;
655 ppf->Release();
656 }
657 }
658 }
659 psl->Release();
660 }
661 if (!ret)
662 setError(QFile::RenameError, qt_error_string());
663
664 if (neededCoInit)
665 CoUninitialize();
666
667 return ret;
668 #else
669 Q_UNUSED(newName);
670 return false;
671 #endif // QT_NO_LIBRARY
672 #else
673 QString linkName = newName;
674 linkName.replace(QLatin1Char('/'), QLatin1Char('\\'));
675 if (!linkName.endsWith(QLatin1String(".lnk")))
676 linkName += QLatin1String(".lnk");
677 QString orgName = fileName(AbsoluteName).replace(QLatin1Char('/'), QLatin1Char('\\'));
678 // Need to append on our own
679 orgName.prepend(QLatin1Char('"'));
680 orgName.append(QLatin1Char('"'));
681 bool ret = SUCCEEDED(SHCreateShortcut((wchar_t*)linkName.utf16(), (wchar_t*)orgName.utf16()));
682 if (!ret)
683 setError(QFile::RenameError, qt_error_string());
684 return ret;
685 #endif // Q_OS_WINCE
686 }
687
688 /*!
689 \reimp
690 */
fileFlags(QAbstractFileEngine::FileFlags type) const691 QAbstractFileEngine::FileFlags QFSFileEngine::fileFlags(QAbstractFileEngine::FileFlags type) const
692 {
693 Q_D(const QFSFileEngine);
694
695 if (type & Refresh)
696 d->metaData.clear();
697
698 QAbstractFileEngine::FileFlags ret = 0;
699
700 if (type & FlagsMask)
701 ret |= LocalDiskFlag;
702
703 bool exists;
704 {
705 QFileSystemMetaData::MetaDataFlags queryFlags = 0;
706
707 queryFlags |= QFileSystemMetaData::MetaDataFlags(uint(type))
708 & QFileSystemMetaData::Permissions;
709
710 // AliasType and BundleType are 0x0
711 if (type & TypesMask)
712 queryFlags |= QFileSystemMetaData::AliasType
713 | QFileSystemMetaData::LinkType
714 | QFileSystemMetaData::FileType
715 | QFileSystemMetaData::DirectoryType
716 | QFileSystemMetaData::BundleType;
717
718 if (type & FlagsMask)
719 queryFlags |= QFileSystemMetaData::HiddenAttribute
720 | QFileSystemMetaData::ExistsAttribute;
721
722 queryFlags |= QFileSystemMetaData::LinkType;
723
724 exists = d->doStat(queryFlags);
725 }
726
727 if (exists && (type & PermsMask))
728 ret |= FileFlags(uint(d->metaData.permissions()));
729
730 if (type & TypesMask) {
731 if ((type & LinkType) && d->metaData.isLegacyLink())
732 ret |= LinkType;
733 if (d->metaData.isDirectory()) {
734 ret |= DirectoryType;
735 } else {
736 ret |= FileType;
737 }
738 }
739 if (type & FlagsMask) {
740 if (d->metaData.exists()) {
741 ret |= ExistsFlag;
742 if (d->fileEntry.isRoot())
743 ret |= RootFlag;
744 else if (d->metaData.isHidden())
745 ret |= HiddenFlag;
746 }
747 }
748 return ret;
749 }
750
fileName(FileName file) const751 QString QFSFileEngine::fileName(FileName file) const
752 {
753 Q_D(const QFSFileEngine);
754 if (file == BaseName) {
755 return d->fileEntry.fileName();
756 } else if (file == PathName) {
757 return d->fileEntry.path();
758 } else if (file == AbsoluteName || file == AbsolutePathName) {
759 QString ret;
760
761 if (!isRelativePath()) {
762 #if !defined(Q_OS_WINCE)
763 if (d->fileEntry.filePath().startsWith(QLatin1Char('/')) || // It's a absolute path to the current drive, so \a.txt -> Z:\a.txt
764 d->fileEntry.filePath().size() == 2 || // It's a drive letter that needs to get a working dir appended
765 (d->fileEntry.filePath().size() > 2 && d->fileEntry.filePath().at(2) != QLatin1Char('/')) || // It's a drive-relative path, so Z:a.txt -> Z:\currentpath\a.txt
766 d->fileEntry.filePath().contains(QLatin1String("/../")) || d->fileEntry.filePath().contains(QLatin1String("/./")) ||
767 d->fileEntry.filePath().endsWith(QLatin1String("/..")) || d->fileEntry.filePath().endsWith(QLatin1String("/.")))
768 {
769 ret = QDir::fromNativeSeparators(QFileSystemEngine::nativeAbsoluteFilePath(d->fileEntry.filePath()));
770 } else
771 #endif
772 {
773 ret = d->fileEntry.filePath();
774 }
775 } else {
776 ret = QDir::cleanPath(QDir::currentPath() + QLatin1Char('/') + d->fileEntry.filePath());
777 }
778
779 // The path should be absolute at this point.
780 // From the docs :
781 // Absolute paths begin with the directory separator "/"
782 // (optionally preceded by a drive specification under Windows).
783 if (ret.at(0) != QLatin1Char('/')) {
784 Q_ASSERT(ret.length() >= 2);
785 Q_ASSERT(ret.at(0).isLetter());
786 Q_ASSERT(ret.at(1) == QLatin1Char(':'));
787
788 // Force uppercase drive letters.
789 ret[0] = ret.at(0).toUpper();
790 }
791
792 if (file == AbsolutePathName) {
793 int slash = ret.lastIndexOf(QLatin1Char('/'));
794 if (slash < 0)
795 return ret;
796 else if (ret.at(0) != QLatin1Char('/') && slash == 2)
797 return ret.left(3); // include the slash
798 else
799 return ret.left(slash > 0 ? slash : 1);
800 }
801 return ret;
802 } else if (file == CanonicalName || file == CanonicalPathName) {
803 if (!(fileFlags(ExistsFlag) & ExistsFlag))
804 return QString();
805 QFileSystemEntry entry(QFileSystemEngine::canonicalName(QFileSystemEntry(fileName(AbsoluteName)), d->metaData));
806
807 if (file == CanonicalPathName)
808 return entry.path();
809 return entry.filePath();
810 } else if (file == LinkName) {
811 return QFileSystemEngine::getLinkTarget(d->fileEntry, d->metaData).filePath();
812 } else if (file == BundleName) {
813 return QString();
814 }
815 return d->fileEntry.filePath();
816 }
817
isRelativePath() const818 bool QFSFileEngine::isRelativePath() const
819 {
820 Q_D(const QFSFileEngine);
821 // drive, e.g. "a:", or UNC root, e.q. "//"
822 return d->fileEntry.isRelative();
823 }
824
ownerId(FileOwner) const825 uint QFSFileEngine::ownerId(FileOwner /*own*/) const
826 {
827 static const uint nobodyID = (uint) -2;
828 return nobodyID;
829 }
830
owner(FileOwner own) const831 QString QFSFileEngine::owner(FileOwner own) const
832 {
833 Q_D(const QFSFileEngine);
834 return QFileSystemEngine::owner(d->fileEntry, own);
835 }
836
setPermissions(uint perms)837 bool QFSFileEngine::setPermissions(uint perms)
838 {
839 Q_D(QFSFileEngine);
840 QSystemError error;
841 bool ret = QFileSystemEngine::setPermissions(d->fileEntry, QFile::Permissions(perms), error);
842 if (!ret)
843 setError(QFile::PermissionsError, error.toString());
844 return ret;
845 }
846
setSize(qint64 size)847 bool QFSFileEngine::setSize(qint64 size)
848 {
849 Q_D(QFSFileEngine);
850
851 if (d->fileHandle != INVALID_HANDLE_VALUE || d->fd != -1 || d->fh) {
852 // resize open file
853 HANDLE fh = d->fileHandle;
854 #if !defined(Q_OS_WINCE)
855 if (fh == INVALID_HANDLE_VALUE) {
856 if (d->fh)
857 fh = (HANDLE)_get_osfhandle(QT_FILENO(d->fh));
858 else
859 fh = (HANDLE)_get_osfhandle(d->fd);
860 }
861 #endif
862 if (fh == INVALID_HANDLE_VALUE)
863 return false;
864 qint64 currentPos = pos();
865
866 if (seek(size) && SetEndOfFile(fh)) {
867 seek(qMin(currentPos, size));
868 return true;
869 }
870
871 seek(currentPos);
872 return false;
873 }
874
875 if (!d->fileEntry.isEmpty()) {
876 // resize file on disk
877 QFile file(d->fileEntry.filePath());
878 if (file.open(QFile::ReadWrite)) {
879 bool ret = file.resize(size);
880 if (!ret)
881 setError(QFile::ResizeError, file.errorString());
882 return ret;
883 }
884 }
885 return false;
886 }
887
888
fileTime(FileTime time) const889 QDateTime QFSFileEngine::fileTime(FileTime time) const
890 {
891 Q_D(const QFSFileEngine);
892
893 if (d->doStat(QFileSystemMetaData::Times))
894 return d->metaData.fileTime(time);
895
896 return QDateTime();
897 }
898
map(qint64 offset,qint64 size,QFile::MemoryMapFlags flags)899 uchar *QFSFileEnginePrivate::map(qint64 offset, qint64 size,
900 QFile::MemoryMapFlags flags)
901 {
902 Q_Q(QFSFileEngine);
903 Q_UNUSED(flags);
904 if (openMode == QFile::NotOpen) {
905 q->setError(QFile::PermissionsError, qt_error_string(ERROR_ACCESS_DENIED));
906 return 0;
907 }
908 if (offset == 0 && size == 0) {
909 q->setError(QFile::UnspecifiedError, qt_error_string(ERROR_INVALID_PARAMETER));
910 return 0;
911 }
912
913 if (mapHandle == NULL) {
914 // get handle to the file
915 HANDLE handle = fileHandle;
916
917 #ifndef Q_OS_WINCE
918 if (handle == INVALID_HANDLE_VALUE && fh)
919 handle = (HANDLE)::_get_osfhandle(QT_FILENO(fh));
920 #endif
921
922 #ifdef Q_USE_DEPRECATED_MAP_API
923 nativeClose();
924 // handle automatically closed by kernel with mapHandle (below).
925 handle = ::CreateFileForMapping((const wchar_t*)fileEntry.nativeFilePath().utf16(),
926 GENERIC_READ | (openMode & QIODevice::WriteOnly ? GENERIC_WRITE : 0),
927 0,
928 NULL,
929 OPEN_EXISTING,
930 FILE_ATTRIBUTE_NORMAL,
931 NULL);
932 // Since this is a special case, we check if the return value was NULL and if so
933 // we change it to INVALID_HANDLE_VALUE to follow the logic inside this function.
934 if(0 == handle)
935 handle = INVALID_HANDLE_VALUE;
936 #endif
937
938 if (handle == INVALID_HANDLE_VALUE) {
939 q->setError(QFile::PermissionsError, qt_error_string(ERROR_ACCESS_DENIED));
940 return 0;
941 }
942
943 // first create the file mapping handle
944 DWORD protection = (openMode & QIODevice::WriteOnly) ? PAGE_READWRITE : PAGE_READONLY;
945 mapHandle = ::CreateFileMapping(handle, 0, protection, 0, 0, 0);
946 if (mapHandle == NULL) {
947 q->setError(QFile::PermissionsError, qt_error_string());
948 #ifdef Q_USE_DEPRECATED_MAP_API
949 ::CloseHandle(handle);
950 #endif
951 return 0;
952 }
953 }
954
955 // setup args to map
956 DWORD access = 0;
957 if (openMode & QIODevice::ReadOnly) access = FILE_MAP_READ;
958 if (openMode & QIODevice::WriteOnly) access = FILE_MAP_WRITE;
959
960 DWORD offsetHi = offset >> 32;
961 DWORD offsetLo = offset & Q_UINT64_C(0xffffffff);
962 SYSTEM_INFO sysinfo;
963 ::GetSystemInfo(&sysinfo);
964 DWORD mask = sysinfo.dwAllocationGranularity - 1;
965 DWORD extra = offset & mask;
966 if (extra)
967 offsetLo &= ~mask;
968
969 // attempt to create the map
970 LPVOID mapAddress = ::MapViewOfFile(mapHandle, access,
971 offsetHi, offsetLo, size + extra);
972 if (mapAddress) {
973 uchar *address = extra + static_cast<uchar*>(mapAddress);
974 maps[address] = extra;
975 return address;
976 }
977
978 switch(GetLastError()) {
979 case ERROR_ACCESS_DENIED:
980 q->setError(QFile::PermissionsError, qt_error_string());
981 break;
982 case ERROR_INVALID_PARAMETER:
983 // size are out of bounds
984 default:
985 q->setError(QFile::UnspecifiedError, qt_error_string());
986 }
987
988 ::CloseHandle(mapHandle);
989 mapHandle = NULL;
990 return 0;
991 }
992
unmap(uchar * ptr)993 bool QFSFileEnginePrivate::unmap(uchar *ptr)
994 {
995 Q_Q(QFSFileEngine);
996 if (!maps.contains(ptr)) {
997 q->setError(QFile::PermissionsError, qt_error_string(ERROR_ACCESS_DENIED));
998 return false;
999 }
1000 uchar *start = ptr - maps[ptr];
1001 if (!UnmapViewOfFile(start)) {
1002 q->setError(QFile::PermissionsError, qt_error_string());
1003 return false;
1004 }
1005
1006 maps.remove(ptr);
1007 if (maps.isEmpty()) {
1008 ::CloseHandle(mapHandle);
1009 mapHandle = NULL;
1010 }
1011
1012 return true;
1013 }
1014
1015 QT_END_NAMESPACE
1016