Light weight MoSH using Tmux and BASH

tssh

#! /bin/bash
# usage: tssh <ssh_target> <tmux target> [<ssh args>]
# requires ssh passwordless login to be setup and tmux to be installed on the remote machine

set -eu

# Count the number of args passed through, if there are not enough print the help.
if [[ "$#" < "2" ]]; then
    echo "Not enough arguments where passed to the script."
    echo "Usage: $0 <ssh_target> <tmux target> [<ssh args>]"
    echo "<ssh_target> = the normal ssh target (user@host)"
    echo "<tmux target> = the tmux session to connect to or '' for the default"
    exit 1
fi

# Pull the args from the command
ssh_target=$1
tmux_target=$2
args=${*:3}
ssh="ssh -o ConnectTimeout=4 -o ServerAliveInterval=4 -o ServerAliveCountMax=2 -o TCPKeepAlive=yes"

# Based on Tmux target, run a different command.
if [ ! -z $tmux_target ]; then
    cmd="tmux attach-session -t '$tmux_target' || tmux new-session -s '$tmux_target'"
else
    # attach to the default target
    cmd="tmux attach-session || tmux new-session"
fi

# Extract the pingable host string from the ssh target
ping_target=$(echo $ssh_target | cut -d"@" -f2)

# Enter the connection loop
echo "Beginning connection loop.."
while true; do
    if $ssh "$ssh_target" $args -t "$cmd"; then
        break
    fi
    echo
    echo "Connection to \"$ping_target\" dropped at $(date)..."
    while ! ping -c 1 -t 3 "$ping_target" >/dev/null 2>&1; do
        sleep 10
    done
done