client.py 文件源码

def maybeParseConfig(self):
        if self.resolv is None:
            # Don't try to parse it, don't set up a call loop
            return

        try:
            resolvConf = file(self.resolv)
        except IOError, e:
            if e.errno == errno.ENOENT:
                # Missing resolv.conf is treated the same as an empty resolv.conf
                self.parseConfig(())
            else:
                raise
        else:
            mtime = os.fstat(resolvConf.fileno()).st_mtime
            if mtime != self._lastResolvTime:
                log.msg('%s changed, reparsing' % (self.resolv,))
                self._lastResolvTime = mtime
                self.parseConfig(resolvConf)

        # Check again in a little while
        from twisted.internet import reactor
        self._parseCall = reactor.callLater(self._resolvReadInterval, self.maybeParseConfig)