Function _serve_one

Lib/multiprocessing/forkserver.py:443–459

(child_r, fds, unused_fds, handlers)

def _serve_one(child_r, fds, unused_fds, handlers):
    # close unnecessary stuff and reset signal handlers
    signal.set_wakeup_fd(-1)
    for sig, val in handlers.items():
        signal.signal(sig, val)
    for fd in unused_fds:
        os.close(fd)

    (_forkserver._forkserver_alive_fd,
     resource_tracker._resource_tracker._fd,
     *_forkserver._inherited_fds) = fds

    # Run process object received over pipe
    parent_sentinel = os.dup(child_r)
    code = spawn._main(child_r, parent_sentinel)

    return code


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