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author | Thiago Macieira <thiago.macieira@intel.com> | 2017-06-29 14:03:26 -0700 |
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committer | Thiago Macieira <thiago.macieira@intel.com> | 2017-08-04 17:29:52 +0000 |
commit | 363dc9146e53e24172bb9c0ae68100a8543bd9ae (patch) | |
tree | 49374e22f5986e9a99e46e0f73a187f55ef67bc9 /src/corelib/io/qfilesystemengine_win.cpp | |
parent | 74197140be68fd7fe54c3a346a0e769928d7a3ea (diff) |
QFSFileEngine: make rename() on Unix not overwrite
The rename(2) system call overwrites, so instead of using it, we try to
use the link/unlink pair. This works for regular cases, but can fail if
trying to change case in case-insensitive filesystems, if we're
operating on a non-Unix filesystem (FAT) or, on Linux, if the file
doesn't belong to the calling user (BSDs permit this). For those cases,
we fall back to rename(2).
That means there's a race condition if a new file is created there. But
we at least reduce the likelihood of that happening for regular files.
Change-Id: I1eba2b016de74620bfc8fffd14ccb38fd929e5aa
Reviewed-by: David Faure <david.faure@kdab.com>
Diffstat (limited to 'src/corelib/io/qfilesystemengine_win.cpp')
-rw-r--r-- | src/corelib/io/qfilesystemengine_win.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/corelib/io/qfilesystemengine_win.cpp b/src/corelib/io/qfilesystemengine_win.cpp index 5a9864edb2..74c6b52a66 100644 --- a/src/corelib/io/qfilesystemengine_win.cpp +++ b/src/corelib/io/qfilesystemengine_win.cpp @@ -1247,6 +1247,17 @@ bool QFileSystemEngine::renameFile(const QFileSystemEntry &source, const QFileSy } //static +bool QFileSystemEngine::renameOverwriteFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error) +{ + bool ret = ::MoveFileEx(reinterpret_cast<const wchar_t *>(source.nativeFilePath().utf16()), + reinterpret_cast<const wchar_t *>(target.nativeFilePath().utf16()), + MOVEFILE_REPLACE_EXISTING) != 0; + if (!ret) + error = QSystemError(::GetLastError(), QSystemError::NativeError); + return ret; +} + +//static bool QFileSystemEngine::removeFile(const QFileSystemEntry &entry, QSystemError &error) { bool ret = ::DeleteFile((wchar_t*)entry.nativeFilePath().utf16()) != 0; |