unix_events.py 文件源码

def _set_inheritable(fd, inheritable):
        cloexec_flag = getattr(fcntl, 'FD_CLOEXEC', 1)

        old = fcntl.fcntl(fd, fcntl.F_GETFD)
        if not inheritable:
            fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
        else:
            fcntl.fcntl(fd, fcntl.F_SETFD, old & ~cloexec_flag)