#!/bin/zsh
zmodload zsh/net/tcp
ztcp -l 12345
res=$?
fd=$REPLY
[ "$res" != 0 ] && exit
while true
do
	ztcp -a $fd
	fd2=$REPLY
	( echo start; nice -20 tar x <&$fd2 ; echo ok ) &
	ztcp -c $fd2
done