process.py 文件源码

def _setup_signal_handlers(self):
        """Setup the signal handlers for daemon mode"""
        signals = self.signals
        # Ignore Terminal I/O Signals
        if hasattr(signal, 'SIGTTOU'):
            signals.ignore(signal.SIGTTOU)
        if hasattr(signal, 'SIGTTIN'):
            signals.ignore(signal.SIGTTIN)
        if hasattr(signal, 'SIGTSTP'):
            signals.ignore(signal.SIGTSTP)
        # Ignore USR signals
        if hasattr(signal, 'SIGUSR1'):
            signals.ignore(signal.SIGUSR1)
        if hasattr(signal, 'SIGUSR2'):
            signals.ignore(signal.SIGUSR2)