public NtStatus CreateFile(string fileName, FileAccess access, FileShare share, FileMode mode, FileOptions options, FileAttributes attributes, DokanFileInfo info)
{
try
{
var res = Wait(MainCreateFile(fileName, access, share, mode, options, info));
#if TRACE
var readWriteAttributes = (access & DataAccess) == 0;
if (!(readWriteAttributes || info.IsDirectory) || (res != DokanResult.Success && !(lastFilePath == fileName && res == DokanResult.FileNotFound)))
{
if (!(info.Context is IBlockStream))
{
Log.Trace($"{fileName}\r\n Access:[{access}]\r\n Share:[{share}]\r\n Mode:[{mode}]\r\n Options:[{options}]\r\n Attr:[{attributes}]\r\nStatus:{res}");
}
lastFilePath = fileName;
}
#endif
return(res);
}
catch (Exception e) when(e.InnerException is FileNotFoundException)
{
Log.Error($"File not found: {fileName}\r\n Access:[{access}]\r\n Share:[{share}]\r\n Mode:[{mode}]\r\n Options:[{options}]\r\n Attr:[{attributes}]", e);
return(DokanResult.FileNotFound);
}
catch (Exception e) when(e.InnerException is TimeoutException)
{
Log.Error($"Timeout: {fileName}\r\n Access:[{access}]\r\n Share:[{share}]\r\n Mode:[{mode}]\r\n Options:[{options}]\r\n Attr:[{attributes}]", e);
return(NtStatus.Timeout);
}
catch (Exception e)
{
Log.Error($"Unexpected exception: {fileName}\r\n Access:[{access}]\r\n Share:[{share}]\r\n Mode:[{mode}]\r\n Options:[{options}]\r\n Attr:[{attributes}]", e);
return(DokanResult.Error);
}
}
private async Task <NtStatus> MainOpenFile(string fileName, FileAccess access, FileShare share, FileMode mode, FileOptions options, DokanFileInfo info)
{
var readAccess = (access & DataReadAccess) != 0;
var writeAccess = (access & DataWriteAccess) != 0;
if (writeAccess && ReadOnly)
{
return(DokanResult.AccessDenied);
}
var ioaccess = System.IO.FileAccess.Read;
if (!readAccess && writeAccess)
{
ioaccess = System.IO.FileAccess.Write;
}
if (readAccess && writeAccess)
{
ioaccess = System.IO.FileAccess.ReadWrite;
}
var result = await provider.OpenFile(fileName, mode, ioaccess, share, options);
if (result == null)
{
return(DokanResult.AccessDenied);
}
info.Context = result;
return(DokanResult.Success);
}
#pragma warning disable RECS0154 // Parameter is never used
private async Task <NtStatus> MainOpenFile(string fileName, FileAccess access, FileShare share, FileMode mode, FileOptions options, FileAttributes attributes, DokanFileInfo info)
#pragma warning restore RECS0154 // Parameter is never used
{
bool readAccess = (access & DataReadAccess) != 0;
bool writeAccess = (access & DataWriteAccess) != 0;
if (writeAccess && ReadOnly)
{
return(DokanResult.AccessDenied);
}
var ioaccess = System.IO.FileAccess.Read;
if (!readAccess && writeAccess)
{
ioaccess = System.IO.FileAccess.Write;
}
if (readAccess && writeAccess)
{
ioaccess = System.IO.FileAccess.ReadWrite;
}
var result = await provider.OpenFile(fileName, mode, ioaccess, share, options);
if (result == null)
{
return(DokanResult.AccessDenied);
}
info.Context = result;
return(DokanResult.Success);
}
private async Task <NtStatus> MainCreateFile(string fileName, FileAccess access, FileShare share, FileMode mode, FileOptions options, DokanFileInfo info)
{
if (!HasAccess(info))
{
return(DokanResult.AccessDenied);
}
if (info.IsDirectory)
{
if (mode == FileMode.CreateNew)
{
return(MainCreateDirectory(fileName));
}
if (mode == FileMode.Open && !await provider.Exists(fileName))
{
return(DokanResult.PathNotFound);
}
if (access == FileAccess.Synchronize)
{
info.Context = new object();
return(DokanResult.Success);
}
info.Context = new object();
return(DokanResult.Success);
}
string streamName = null;
fileName = fileName.Replace("\\:", ":");
if (fileName.Contains(':'))
{
var names = fileName.Split(':');
fileName = names[0];
streamName = names[1];
}
var item = await provider.FetchNode(fileName);
if (streamName != null && item != null)
{
return(CheckStreams(fileName, mode, info, streamName, item));
}
var readWriteAttributes = (access & DataAccess) == 0;
switch (mode)
{
case FileMode.Open:
if (item == null)
{
return(DokanResult.FileNotFound);
}
// check if driver only wants to read attributes, security info, or open directory
if (item.IsDir)
{
info.IsDirectory = item.IsDir;
info.Context = new object();
// must set it to something if you return DokanError.Success
return(DokanResult.Success);
}
break;
case FileMode.CreateNew:
if (item != null)
{
return(DokanResult.FileExists);
}
break;
case FileMode.Truncate:
if (item == null)
{
return(DokanResult.FileNotFound);
}
break;
}
if (readWriteAttributes)
{
info.Context = new object();
return(DokanResult.Success);
}
return(await MainOpenFile(fileName, access, share, mode, options, info));
}
