From 6545404afad30b60d1a8e9a2abaf301abaf8f6a5 Mon Sep 17 00:00:00 2001 From: Friedemann Kleint Date: Mon, 20 Apr 2015 10:57:20 +0200 Subject: Windows: Fix QLockFile hanging when file cannot be created. Return QLockFile::PermissionError when file does not exist, preventing the stale file detection logic from triggering. Add Windows-only autotest trying to create a lock file in a system folder guarded with checks for elevated processes and UAC virtualization. Task-number: QTBUG-45631 Change-Id: I1790f8f925660f6bf1df94c2ced901e6ec57cbb0 Reviewed-by: Joerg Bornemann Reviewed-by: Oliver Wolff --- src/corelib/io/qlockfile_win.cpp | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'src/corelib/io/qlockfile_win.cpp') diff --git a/src/corelib/io/qlockfile_win.cpp b/src/corelib/io/qlockfile_win.cpp index a36e6e93b8..9fe86e1ad8 100644 --- a/src/corelib/io/qlockfile_win.cpp +++ b/src/corelib/io/qlockfile_win.cpp @@ -48,6 +48,12 @@ static inline QByteArray localHostName() return qgetenv("COMPUTERNAME"); } +static inline bool fileExists(const wchar_t *fileName) +{ + WIN32_FILE_ATTRIBUTE_DATA data; + return GetFileAttributesEx(fileName, GetFileExInfoStandard, &data); +} + QLockFile::LockError QLockFilePrivate::tryLock_sys() { const QFileSystemEntry fileEntry(fileName); @@ -79,8 +85,13 @@ QLockFile::LockError QLockFilePrivate::tryLock_sys() case ERROR_SHARING_VIOLATION: case ERROR_ALREADY_EXISTS: case ERROR_FILE_EXISTS: - case ERROR_ACCESS_DENIED: // readonly file, or file still in use by another process. Assume the latter, since we don't create it readonly. return QLockFile::LockFailedError; + case ERROR_ACCESS_DENIED: + // readonly file, or file still in use by another process. + // Assume the latter if the file exists, since we don't create it readonly. + return fileExists((const wchar_t*)fileEntry.nativeFilePath().utf16()) + ? QLockFile::LockFailedError + : QLockFile::PermissionError; default: qWarning() << "Got unexpected locking error" << lastError; return QLockFile::UnknownError; -- cgit v1.2.3