def _write_image(self, image):
sdmux.dut_disconnect(self.config.sdmux_id)
sdmux.host_usda(self.config.sdmux_id)
device = self.mux_device()
logging.info("dd'ing image to device (%s)", device)
dd_cmd = 'dd if=%s of=%s bs=4096 conv=fsync' % (image, device)
dd_proc = subprocess.Popen(dd_cmd, shell=True)
dd_proc.wait()
if dd_proc.returncode != 0:
raise CriticalError("Failed to dd image to device (Error code %d)" % dd_proc.returncode)
sdmux.host_disconnect(self.config.sdmux_id)
def file_system(self, partition, directory):
"""
This works in conjunction with the "mux_device" function to safely
access a partition/directory on the sdmux filesystem
"""
self.proc.sendline('sync')
self.proc.expect(self.tester_ps1_pattern)
logging.info('powering off')
self.context.run_command(self.config.power_off_cmd)
sdmux.dut_disconnect(self.config.sdmux_id)
sdmux.host_usda(self.config.sdmux_id)
mntdir = os.path.join(self.scratch_dir, 'sdmux_mnt')
ensure_directory(mntdir)
device = self.mux_device()
device = '%s%s' % (device, partition)
try:
self.context.run_command(['mount', device, mntdir], failok=False)
if directory[0] == '/':
directory = directory[1:]
path = os.path.join(mntdir, directory)
ensure_directory(path)
logging.info('sdmux(%s) mounted at: %s', device, path)
yield path
except CriticalError:
raise
except subprocess.CalledProcessError:
raise CriticalError('Unable to access sdmux device')
except KeyboardInterrupt:
raise KeyboardInterrupt
except:
logging.exception('Error accessing sdmux filesystem')
raise CriticalError('Error accessing sdmux filesystem')
finally:
logging.info('unmounting sdmux')
try:
_flush_files(mntdir)
self.context.run_command(['umount', device], failok=False)
except subprocess.CalledProcessError:
logging.exception('umount failed, re-try in 10 seconds')
time.sleep(10)
if self.context.run_command(['umount', device]) != 0:
logging.error(
'Unable to unmount sdmux device %s', device)
sdmux.host_disconnect(self.config.sdmux_id)
