def suspend(suspendToMemory, waitSeconds, onResume=None):
if waitSeconds <= 0:
return
sync_with_cloud(300)
#syncDiskWithMemory()
suspendStartTime = time()
if suspendToMemory:
suspendCmd = 'rtcwake -l -m mem -s %d' % (waitSeconds)
if onResume is not None:
suspendCmd = '{0} && {1}'.format(suspendCmd, onResume)
try:
retcode, output = callExt(suspendCmd)
if len(output) > 0:
#print the output of the external command
for outLine in output.splitlines():
logAppend("callExt: {0}".format(outLine))
if retcode < 0:
raise SuspendError("rtc", "suspend: rtcwake was terminated by signal {0}".format(-retcode))
if retcode > 0:
raise SuspendError("rtc", "suspend: rtcwake returned error code {0}".format(retcode))
except ShellError as e:
raise SuspendError("OSError", "suspend: rtcwake execution failed: {0}".format(e))
else:
sleep(waitSeconds)
# Resume from suspend
if time() - suspendStartTime < waitSeconds:
# Resume from suspend was not caused by the rtc, such as power button or keyboard
return False
return True
def shutdown(minutes_to_delay):
shutdownCmd = 'shutdown -h +%d' % (minutes_to_delay)
retcode, output = callExt(shutdownCmd)
if len(output) > 0:
#print the output of the external command
for outLine in output.splitlines():
logAppend("callExt: {0}".format(outLine))
def main(argc, argv):
global MAIN_SCRIPT_NAME
MAIN_SCRIPT_NAME = path.basename(argv[0])
configurationFile = DEFAULT_CONFIG_FILE
if argc > 2:
usage()
return 1
if argc == 2:
configurationFile = argv[1]
configUpdate(configurationFile)
if SUSPEND_TO_MEMORY:
if not hasPrivilegesToShutdown():
print '%s: You need to have root privileges to run this script!' % (MAIN_SCRIPT_NAME)
return 1
logInit('{0}/{1}-log.txt'.format(WORKING_DIR, path.splitext(MAIN_SCRIPT_NAME)[0]))
grabLoopExitStatus = 0
try:
grabLoopExitStatus = grabLoop(WORKING_DIR, CAMERAS_LIST, SUSPEND_TO_MEMORY)
except Exception as e:
#catch ANY exception
logAppend('{0}: unrecovable exception {1}'.format(MAIN_SCRIPT_NAME, e))
return 2 #severe error
if grabLoopExitStatus == 1:
logAppend('%s: stopped by the User' % (MAIN_SCRIPT_NAME))
return grabLoopExitStatus
def grab(picturesBaseDir, cameraList):
# Make the grabbed picture file path
now = datetime.now()
picturesDirName = '{0:s}/CAMSHOT_{1:%Y%m%d}'.format(picturesBaseDir, now)
try:
makedirs(picturesDirName)
logAppend('%s: create directory %s' % (MAIN_SCRIPT_NAME, picturesDirName))
except OSError, e:
if not path.isdir(picturesDirName):
# If the directory doesn't already exist, there was an error on creation
raise CamShotError("{0}: create directory {1} [OS errno {2}]: {3}".format(MAIN_SCRIPT_NAME, picturesDirName, e.errno, e.strerror))
def syncDiskWithMemory():
print 'Sync Disk With Memory'
try:
retcode, output = callExt('sync')
if len(output) > 0:
#print the output of the external command
for outLine in output.splitlines():
logAppend("sync: {0}".format(outLine))
if retcode < 0:
raise SuspendError("sync", "sync was terminated with failure code {0}".format(-retcode))
except ShellError as e:
raise SuspendError("OSError", "sync execution failed: {0}".format(e))
def sync_with_cloud(stimeout):
print 'Wait cloud syncing for {0} seconds...'.format(stimeout)
SLEEP_SECONDS = 5
daemonNotRunningErrorAlreadyGet = False
nsec = 0
while nsec < stimeout:
statusLines = None
try:
statusLines = syncStatus()
except CloudError as e:
if e.etype == 'DaemonNotRunningError' and not daemonNotRunningErrorAlreadyGet:
daemonNotRunningErrorAlreadyGet = True
logAppend('dropbox: start daemon')
if not start_dropbox():
raise CloudError("DaemonNotInstalledError",
"The Dropbox daemon is not installed!")
else:
raise
if statusLines is not None:
if len(statusLines) > 0:
if statusLines[0] == 'Up to date':
return
sleep(SLEEP_SECONDS)
nsec = nsec + SLEEP_SECONDS
if statusLines is not None:
for statusLine in statusLines:
logAppend('dropbox: {0}'.format(statusLine))
# raise CloudError("SyncingTimeoutError", "Syncing timeout")
logAppend('dropbox: Syncing timeout')
def sync_with_cloud(stimeout):
print 'Wait cloud syncing for {0} seconds...'.format(stimeout)
SLEEP_SECONDS = 5
daemonNotRunningErrorAlreadyGet = False
nsec = 0
while nsec < stimeout:
statusLines = None
try:
statusLines = syncStatus()
except CloudError as e:
if e.etype == 'DaemonNotRunningError' and not daemonNotRunningErrorAlreadyGet:
daemonNotRunningErrorAlreadyGet = True
logAppend('dropbox: start daemon')
if not start_dropbox():
raise CloudError("DaemonNotInstalledError", "The Dropbox daemon is not installed!")
else:
raise
if statusLines is not None:
if len(statusLines) > 0:
if statusLines[0] == 'Up to date':
return
sleep(SLEEP_SECONDS)
nsec = nsec + SLEEP_SECONDS
if statusLines is not None:
for statusLine in statusLines:
logAppend('dropbox: {0}'.format(statusLine))
# raise CloudError("SyncingTimeoutError", "Syncing timeout")
logAppend('dropbox: Syncing timeout')
def check_and_reset_network_connection():
'''Require DNS servers setting.
See: http://askubuntu.com/a/465759 '''
print 'Check network connection'
if not isConnectionOn():
logAppend('network:reset connection')
# Require root permissions
# See: http://ubuntuforums.org/showthread.php?t=1829796
retcode, output = callExt('service network-manager restart')
if len(output) > 0:
#print the output of the external command
for outLine in output.splitlines():
logAppend("{0}".format(outLine))
if not isConnectionOn():
# The connection is lost
# raise CloudError("network", "ping error")
logAppend('network:ping error')
def check_and_reset_network_connection():
'''Require DNS servers setting.
See: http://askubuntu.com/a/465759 '''
print 'Check network connection'
if not isConnectionOn():
logAppend('network:reset connection')
# Require root permissions
# See: http://ubuntuforums.org/showthread.php?t=1829796
retcode, output = callExt('service network-manager restart')
if len(output) > 0:
#print the output of the external command
for outLine in output.splitlines():
logAppend("{0}".format(outLine))
if not isConnectionOn():
# The connection is lost
# raise CloudError("network", "ping error")
logAppend('network:ping error')
def get_delay_between_shots():
wakeup_datetime = DaylightRepeatingEvent(TIME_ELAPSED_BETWEEN_SHOTS, TIME_DAYLIGHT_BEGIN, TIME_DAYLIGHT_END)
now = datetime.now()
next_datetime = wakeup_datetime.next_occurrence(now)
logAppend('{0}: will resume at {1}'.format(MAIN_SCRIPT_NAME, next_datetime))
return int( (next_datetime-now).total_seconds() )
# Make the grabbed picture file path
now = datetime.now()
picturesDirName = '{0:s}/CAMSHOT_{1:%Y%m%d}'.format(picturesBaseDir, now)
try:
makedirs(picturesDirName)
logAppend('%s: create directory %s' % (MAIN_SCRIPT_NAME, picturesDirName))
except OSError, e:
if not path.isdir(picturesDirName):
# If the directory doesn't already exist, there was an error on creation
raise CamShotError("{0}: create directory {1} [OS errno {2}]: {3}".format(MAIN_SCRIPT_NAME, picturesDirName, e.errno, e.strerror))
# Grab a picture from cameras
cameraIndex = 0
for camera in cameraList:
pictureFileFullName = '{0:s}/CS{1:%Y%m%d%H%M}_{2:02d}.jpg'.format(picturesDirName, now, cameraIndex)
logAppend('%s: grab in file %s' % (MAIN_SCRIPT_NAME, pictureFileFullName))
imageCaptureTries = 0
while imageCaptureTries < 3:
if imageCapture(camera, pictureFileFullName):
break;
sleep(3)
imageCaptureTries = imageCaptureTries + 1
if imageCaptureTries >= 3:
logAppend('%s: grab picture error' % (MAIN_SCRIPT_NAME))
cameraIndex = cameraIndex + 1
def grabLoop(workingDir, cameraList, suspendToMemory):
while True:
tBegin = time()
check_and_reset_network_connection()
sync_with_cloud(120)