dumbpipe doesn't seem to signal when the pipe operation has "ended"

[AccessViolation95]

I'm using dumbpipe to cat a file over a network connection and receive it on the computer that's connected to a tape drive (/dev/nst0), to write the file to tape.

When the cat file | dumbpipe connect [ticket] side is done, it doesn't seem to signal that to the dumbpipe listen | mbuffer -o /dev/nst0 on the other machine, so I need to do these steps in this order:

• press Ctrl+c on the sending end.
• press Enter on the receiving end (which seems cause some 'closing' action on either mbuffer or dumbpipe).

If I instead Ctrl+c out on the receiving end, it seems mbuffer doesn't flush the final bit of data, which results in the last 40 or so kilobytes never being written to tape.