def demonstrate(device_name):
""" Mount *and* connect the specified device.
The device must not be mounted already.
The Controller will attempt connection to the device.
Return True if connection succeeds before the time-out period elapses.
"""
mount_from_settings(device_name)
time_accum = 0.0
num_checks = 0
while time_accum < time_out:
num_checks += 1
expanding_interval = time_interval * num_checks
time_accum += expanding_interval
# Don't hammer the Controller or it will crash.
# This not a denial-of-service (DOS) attack ;-)
time.sleep(expanding_interval)
print('connected(' + device_name, sep='', end='): ')
if connected(device_name):
print(True, 'after %s checks and %s seconds.' % (num_checks, time_accum))
return True
else:
print(False)
continue
print('Unconnected after %s checks and %s seconds.' % (num_checks, time_accum))
return False
def demonstrate(device_name):
""" Mount *and* connect the specified device.
The device must not be mounted already.
The Controller will attempt connection to the device.
Return True if connection succeeds before the time-out period elapses.
"""
mount_from_settings(device_name)
time_accum = 0.0
num_checks = 0
while time_accum < time_out:
num_checks += 1
expanding_interval = time_interval * num_checks
time_accum += expanding_interval
# Don't hammer the Controller or it will crash.
# This not a denial-of-service (DOS) attack ;-)
time.sleep(expanding_interval)
print('connected(' + device_name, sep='', end='): ')
if connected(device_name):
print(True,
'after %s checks and %s seconds.' % (num_checks, time_accum))
return True
else:
print(False)
continue
print('Unconnected after %s checks and %s seconds.' %
(num_checks, time_accum))
return False
def main():
print(plain(doc(connected)))
device_names = inventory_mounted()
if not device_names:
print('There are no devices mounted on the Controller.')
else:
device_name = device_names[0]
print('is connected(%s):' % device_name, connected(device_name))
def main():
print(plain(doc(connected)))
device_names = inventory_mounted()
if not device_names:
print('There are no devices mounted on the Controller.')
else:
device_name = device_names[0]
print('is connected(%s):' % device_name, connected(device_name))
def main():
''' Document and demonstrate the function until a capable device is found.'''
print(plain(doc(capability_discovery)))
for device_name in inventory_mounted():
try:
if demonstrate(device_name):
return os.EX_OK
except Exception as e:
if connected(device_name):
# Unexplained exception.
print(e)
return os.EX_TEMPFAIL
else:
# Expect exception when device not connected.
print('connected(%s): False' % device_name)
return os.EX_TEMPFAIL