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#!/bin/bash
#
# netcom
#
# Combine socat and picocom to attach to a raw network socket. In many ways
# this is similar to telnet but makes no attempt to be clever w.r.t. local
# echo (and this is what you want if you want if you are connecting to a
# raw network socket).
#
# check arguments
if [ $# -ne 2 ]
then
echo "USAGE: netcom <host> <port>" >&2
exit 1
fi
# configuration
host="$1"
port="$2"
link="$HOME/.netcom/pty.$$"
# create a pty with a named soft-link, waitslave will defer connection to the
# network until the pty is opened (and also causes socat to exit when the pty
# is closed)
mkdir -p `dirname "$link"`
rm -f "$link"
socat "pty,link=$link,waitslave" "tcp:$host:$port" &
# wait for the pty to be ready
while [ ! -e "$link" ]
do
usleep 1000
done
# connect to the pty, disabling locking so we don't need to run as root
# and enabling Zmodem file transfers.
picocom --nolock --send-cmd sz --receive-cmd rz --nolock "$link"
# clean up the soft-link and wait for socat to exit
rm -f "$link"
wait
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