@@ -137,6 +137,32 @@ class Spawn:
os.write(self.fd, data.encode(errors='replace'))
+ def receive(self, num_bytes):
+ """Receive data from the sub-process's stdin.
+
+ Args:
+ num_bytes (int): Maximum number of bytes to read
+
+ Returns:
+ str: The data received
+
+ Raises:
+ ValueError if U-Boot died
+ """
+ try:
+ c = os.read(self.fd, num_bytes).decode(errors='replace')
+ except OSError as err:
+ # With sandbox, try to detect when U-Boot exits when it
+ # shouldn't and explain why. This is much more friendly than
+ # just dying with an I/O error
+ if self.decode_signal and err.errno == 5: # I/O error
+ alive, _, info = self.checkalive()
+ if alive:
+ raise err
+ raise ValueError('U-Boot exited with %s' % info)
+ raise
+ return c
+
def expect(self, patterns):
"""Wait for the sub-process to emit specific data.
@@ -193,18 +219,7 @@ class Spawn:
events = self.poll.poll(poll_maxwait)
if not events:
raise Timeout()
- try:
- c = os.read(self.fd, 1024).decode(errors='replace')
- except OSError as err:
- # With sandbox, try to detect when U-Boot exits when it
- # shouldn't and explain why. This is much more friendly than
- # just dying with an I/O error
- if self.decode_signal and err.errno == 5: # I/O error
- alive, _, info = self.checkalive()
- if alive:
- raise err
- raise ValueError('U-Boot exited with %s' % info)
- raise
+ c = self.receive(1024)
if self.logfile_read:
self.logfile_read.write(c)
self.buf += c
There is quite a bit of code to deal with receiving data from the target so move it into its own receive() function. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) test/py/u_boot_spawn.py | 39 +++++++++++++++++++++++++++------------ 1 file changed, 27 insertions(+), 12 deletions(-)