public void CannotAccessDeletedFile()
{
ulong volumeSerial;
FileId fileId;
string path = GetFullPath("F");
using (FileStream fs = File.Create(path))
{
volumeSerial = FileUtilities.GetVolumeSerialNumberByHandle(fs.SafeFileHandle);
fileId = FileUtilities.ReadFileUsnByHandle(fs.SafeFileHandle).Value.FileId;
}
File.Delete(path);
VolumeMap map = CreateMapOfAllLocalVolumes();
using (FileAccessor accessor = map.CreateFileAccessor())
{
SafeFileHandle handle;
FileAccessor.OpenFileByIdResult openResult = accessor.TryOpenFileById(
volumeSerial,
fileId,
FileDesiredAccess.GenericRead,
FileShare.ReadWrite,
FileFlagsAndAttributes.None,
out handle);
using (handle)
{
XAssert.AreEqual(FileAccessor.OpenFileByIdResult.FailedToFindFile, openResult);
XAssert.IsNull(handle);
}
}
}
/// <inheritdoc />
public bool TryGetFileHandleAndPathFromFileIdAndVolumeId(FileIdAndVolumeId fileIdAndVolumeId, FileShare fileShare, out SafeFileHandle handle, out string path)
{
path = null;
FileAccessor.OpenFileByIdResult openResult = m_fileAccessor.TryOpenFileById(
fileIdAndVolumeId.VolumeSerialNumber,
fileIdAndVolumeId.FileId,
FileDesiredAccess.GenericRead,
fileShare,
FileFlagsAndAttributes.None,
out handle);
switch (openResult)
{
case FileAccessor.OpenFileByIdResult.FailedToOpenVolume:
case FileAccessor.OpenFileByIdResult.FailedToFindFile:
case FileAccessor.OpenFileByIdResult.FailedToAccessExistentFile:
Contract.Assert(handle == null);
return(false);
case FileAccessor.OpenFileByIdResult.Succeeded:
Contract.Assert(handle != null && !handle.IsInvalid);
path = FileUtilities.GetFinalPathNameByHandle(handle, volumeGuidPath: false);
return(true);
default:
throw Contract.AssertFailure("Unhandled OpenFileByIdResult");
}
}
public void CanAccessMultipleFilesById()
{
var fileIdAndVolumeSerialPairs = new List <Tuple <FileId, ulong> >();
for (int i = 0; i < 3; i++)
{
string path = GetFullPath("F" + i);
using (FileStream fs = File.Create(path))
{
fs.WriteByte((byte)i);
ulong volumeSerial = FileUtilities.GetVolumeSerialNumberByHandle(fs.SafeFileHandle);
FileId fileId = FileUtilities.ReadFileUsnByHandle(fs.SafeFileHandle).Value.FileId;
fileIdAndVolumeSerialPairs.Add(Tuple.Create(fileId, volumeSerial));
}
}
VolumeMap map = CreateMapOfAllLocalVolumes();
using (FileAccessor accessor = map.CreateFileAccessor())
{
for (int i = 0; i < fileIdAndVolumeSerialPairs.Count; i++)
{
Tuple <FileId, ulong> fileIdAndVolumeSerial = fileIdAndVolumeSerialPairs[i];
SafeFileHandle handle;
FileAccessor.OpenFileByIdResult openResult = accessor.TryOpenFileById(
fileIdAndVolumeSerial.Item2,
fileIdAndVolumeSerial.Item1,
FileDesiredAccess.GenericRead,
FileShare.ReadWrite,
FileFlagsAndAttributes.None,
out handle);
using (handle)
{
XAssert.AreEqual(openResult, FileAccessor.OpenFileByIdResult.Succeeded);
XAssert.IsNotNull(handle);
using (var fileStream = new FileStream(handle, FileAccess.Read))
{
XAssert.AreEqual(i, fileStream.ReadByte());
}
}
}
}
}
