tree b5f266e100ac1f7de92b69ef32aec9966ae48ea9
parent d2d8cb68261de002fe549f55ae4b2bd005d2cd1d
author Kun Yi <kunyi731@gmail.com> 1547069728 -0800
committer Kun Yi <kunyi731@gmail.com> 1551119763 -0800

Add an interface for sys operations

Create a mock sys interface to test file operations.

Change-Id: Iad23394c600d66ee5de8e21db4702f38492c3058
Signed-off-by: Kun Yi <kunyi@google.com>