os.read() returns a byte array in Python 3.5.2 and needs to be converted
into a string. Check if the returned value is an instance of bytes and
if it is decode it as a utf-8 string. If it is not a utf-8 encoded string
the decoding may fail with an exception.
Prior to this fix the comparisions check data == "" would fail when data
was b'' and would cause an infinite memory leaking loop. joins would
also fail with an exception below but due to the infinite loop it never
made it that far.
Signed-off-by: George McCollister <george.mccollister@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Syntax for exception handling is a little more strict in python 3.x.
Convert all uses to a form accepted by both python 2.x & python 3.x.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Acked-by: Simon Glass <sjg@chromium.org>
This adds a new library on top of subprocess which permits access to
the subprocess output as it is being generated. We can therefore
give the illusion that a process is running independently, but still
monitor its output so that we know what is going on.
It is possible to display output on a terminal as it is generated
(a little like tee). The supplied output function is called with all
stdout/stderr data as it arrives.
Signed-off-by: Simon Glass <sjg@chromium.org>
