ExecContext has get() / _get() and put() / _put(), which make a fine
API for a file transfer class. A class supporting file transfer
should not, however, be forced to implement _run() and _sudo(), so
place this functionality in a new class FileTransfer, and derive
ExecContext from it.
Signed-off-by: Jan Lindemann <jan@janware.com>
Jan Lindemann
825dd1449c