def _HandleControlC(signal_num, cur_stack_frame):
"""Called when user hits ^C.
This function prints a brief message instead of the normal Python stack trace
(unless -D option is used).
Args:
signal_num: Signal that was caught.
cur_stack_frame: Unused.
"""
if debug_level >= 2:
stack_trace = ''.join(traceback.format_list(traceback.extract_stack()))
_OutputAndExit('DEBUG: Caught CTRL-C (signal %d) - Exception stack trace:\n'
' %s' %
(signal_num, re.sub('\\n', '\n ', stack_trace)),
exception=ControlCException())
else:
_OutputAndExit('Caught CTRL-C (signal %d) - exiting' % signal_num,
exception=ControlCException())
def MultithreadedMainSignalHandler(signal_num, cur_stack_frame):
"""Final signal handler for multi-threaded main process."""
if signal_num == signal.SIGINT:
if logging.getLogger().isEnabledFor(logging.DEBUG):
stack_trace = ''.join(traceback.format_list(traceback.extract_stack()))
err = ('DEBUG: Caught CTRL-C (signal %d) - Exception stack trace:\n'
' %s' % (signal_num, re.sub('\\n', '\n ', stack_trace)))
try:
sys.stderr.write(err.encode(UTF8))
except UnicodeDecodeError:
# Can happen when outputting invalid Unicode filenames.
sys.stderr.write(err)
else:
sys.stderr.write('Caught CTRL-C (signal %d) - exiting\n' % signal_num)
metrics.LogFatalError(exception=ControlCException())
metrics.Shutdown()
KillProcess(os.getpid())