reduction.py 文件源码

def DupFd(fd):
        '''Return a wrapper for an fd.'''
        popen_obj = context.get_spawning_popen()
        if popen_obj is not None:
            return popen_obj.DupFd(popen_obj.duplicate_for_child(fd))
        elif HAVE_SEND_HANDLE:
            from . import resource_sharer
            return resource_sharer.DupFd(fd)
        else:
            raise ValueError('SCM_RIGHTS appears not to be available')

#
# Try making some callable types picklable
#