Tie together two VMWare (Fusion) serial pipes

knoopje.sh

#! /bin/sh
#
# Tie together two serial pipes in VMWare (Fusion)
#
# 1st:
# serial1.present = "TRUE"
# serial1.fileType = "pipe"
# serial1.yieldOnMsrRead = "TRUE"
# serial1.startConnected = "TRUE"
# serial1.fileName = "ax25-1"
#
# 2nd:
# serial1.present = "TRUE"
# serial1.fileType = "pipe"
# serial1.yieldOnMsrRead = "TRUE"
# serial1.startConnected = "TRUE"
# serial1.fileName = "ax25-2"
#


exec 3>ax25-2-1
exec 4>ax25-1-2

tail -F ax25-1-2 | socat -d -d ./ax25-1 stdio >ax25-2-1 & WIP=$!
tail -F ax25-2-1 | socat -d -d ./ax25-2 stdio >ax25-1-2

wait $WIP