/// <summary>
/// Opens the specified file.
/// </summary>
/// <param name="path">The full path of the file to open.</param>
/// <param name="mode">The file mode for the created stream.</param>
/// <param name="access">The access permissions for the created stream.</param>
/// <returns>The new stream.</returns>
public override SparseStream OpenFile(string path, FileMode mode, FileAccess access)
{
try
{
Nfs3AccessPermissions requested;
if (access == FileAccess.Read)
{
requested = Nfs3AccessPermissions.Read;
}
else if (access == FileAccess.ReadWrite)
{
requested = Nfs3AccessPermissions.Read | Nfs3AccessPermissions.Modify;
}
else
{
requested = Nfs3AccessPermissions.Modify;
}
if (mode == FileMode.Create || mode == FileMode.CreateNew || (mode == FileMode.OpenOrCreate && !FileExists(path)))
{
Nfs3FileHandle parent = GetParentDirectory(path);
Nfs3SetAttributes setAttrs = new Nfs3SetAttributes();
setAttrs.Mode = NfsOptions.NewFilePermissions;
setAttrs.SetMode = true;
setAttrs.Size = 0;
setAttrs.SetSize = true;
Nfs3FileHandle handle = _client.Create(parent, Utilities.GetFileFromPath(path), mode != FileMode.Create, setAttrs);
return(new Nfs3FileStream(_client, handle, access));
}
else
{
Nfs3FileHandle handle = GetFile(path);
Nfs3AccessPermissions actualPerms = _client.Access(handle, requested);
if (actualPerms != requested)
{
throw new UnauthorizedAccessException(string.Format(CultureInfo.InvariantCulture, "Access denied opening '{0}'. Requested permission '{1}', got '{2}'", path, requested, actualPerms));
}
Nfs3FileStream result = new Nfs3FileStream(_client, handle, access);
if (mode == FileMode.Append)
{
result.Seek(0, SeekOrigin.End);
}
else if (mode == FileMode.Truncate)
{
result.SetLength(0);
}
return(result);
}
}
catch (Nfs3Exception ne)
{
throw ConvertNfsException(ne);
}
}
/// <summary>
/// Copies a file from one location to another.
/// </summary>
/// <param name="sourceFile">The source file to copy</param>
/// <param name="destinationFile">The destination path</param>
/// <param name="overwrite">Whether to overwrite any existing file (true), or fail if such a file exists</param>
public override void CopyFile(string sourceFile, string destinationFile, bool overwrite)
{
try
{
Nfs3FileHandle sourceParent = GetParentDirectory(sourceFile);
Nfs3FileHandle destParent = GetParentDirectory(destinationFile);
string sourceFileName = Utilities.GetFileFromPath(sourceFile);
string destFileName = Utilities.GetFileFromPath(destinationFile);
Nfs3FileHandle sourceFileHandle = _client.Lookup(sourceParent, sourceFileName);
if (sourceFileHandle == null)
{
throw new FileNotFoundException(string.Format(CultureInfo.InvariantCulture, "The file '{0}' does not exist", sourceFile), sourceFile);
}
Nfs3FileAttributes sourceAttrs = _client.GetAttributes(sourceFileHandle);
if ((sourceAttrs.Type & Nfs3FileType.Directory) != 0)
{
throw new FileNotFoundException(string.Format(CultureInfo.InvariantCulture, "The path '{0}' is not a file", sourceFile), sourceFile);
}
Nfs3FileHandle destFileHandle = _client.Lookup(destParent, destFileName);
if (destFileHandle != null)
{
if (overwrite == false)
{
throw new IOException(string.Format(CultureInfo.InvariantCulture, "The destination file '{0}' already exists", destinationFile));
}
}
// Create the file, with temporary permissions
Nfs3SetAttributes setAttrs = new Nfs3SetAttributes();
setAttrs.Mode = UnixFilePermissions.OwnerRead | UnixFilePermissions.OwnerWrite;
setAttrs.SetMode = true;
setAttrs.Size = sourceAttrs.Size;
setAttrs.SetSize = true;
destFileHandle = _client.Create(destParent, destFileName, !overwrite, setAttrs);
// Copy the file contents
using (Nfs3FileStream sourceFs = new Nfs3FileStream(_client, sourceFileHandle, FileAccess.Read))
using (Nfs3FileStream destFs = new Nfs3FileStream(_client, destFileHandle, FileAccess.Write))
{
int bufferSize = (int)Math.Max(1 * Sizes.OneMiB, Math.Min(_client.FileSystemInfo.WritePreferredBytes, _client.FileSystemInfo.ReadPreferredBytes));
byte[] buffer = new byte[bufferSize];
int numRead = sourceFs.Read(buffer, 0, bufferSize);
while (numRead > 0)
{
destFs.Write(buffer, 0, numRead);
numRead = sourceFs.Read(buffer, 0, bufferSize);
}
}
// Set the new file's attributes based on the source file
setAttrs = new Nfs3SetAttributes();
setAttrs.Mode = sourceAttrs.Mode;
setAttrs.SetMode = true;
setAttrs.AccessTime = sourceAttrs.AccessTime;
setAttrs.SetAccessTime = Nfs3SetTimeMethod.ClientTime;
setAttrs.ModifyTime = sourceAttrs.ModifyTime;
setAttrs.SetModifyTime = Nfs3SetTimeMethod.ClientTime;
setAttrs.Gid = sourceAttrs.Gid;
setAttrs.SetGid = true;
_client.SetAttributes(destFileHandle, setAttrs);
}
catch (Nfs3Exception ne)
{
throw ConvertNfsException(ne);
}
}