This helper acts like /dev/zero (outputs \x00 indefinitely) in an OS-independent fashion. This ensures we don't need to special-case around Windows in tests that want to open /dev/zero. Signed-off-by: Aleksa Sarai <asarai@suse.de>
Signed-off-by: chaowang <chaowang@localhost.localdomain>
Signed-off-by: Daniel Nephin <dnephin@docker.com>