arbiter.py 文件源码

def reexec(self):
        """\
        Relaunch the master and workers.
        """
        if self.reexec_pid != 0:
            self.log.warning("USR2 signal ignored. Child exists.")
            return

        if self.master_pid != 0:
            self.log.warning("USR2 signal ignored. Parent exists")
            return

        master_pid = os.getpid()
        self.reexec_pid = os.fork()
        if self.reexec_pid != 0:
            return

        self.cfg.pre_exec(self)

        environ = self.cfg.env_orig.copy()
        fds = [l.fileno() for l in self.LISTENERS]
        environ['GUNICORN_FD'] = ",".join([str(fd) for fd in fds])
        environ['GUNICORN_PID'] = str(master_pid)

        os.chdir(self.START_CTX['cwd'])

        # exec the process using the original environnement
        os.execvpe(self.START_CTX[0], self.START_CTX['args'], environ)