cysh

#!/bin/bash

# set -x

#function lookup_host() {
#    if [[ $1 =~ ^([^.]*|[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)$ ]]; then
#        echo "$1"
#    else
#        host -t a "${1}" | sed -e $'/.* has address / { s///; p; d; q; }; /.*\tA\t/ { s///; p; d; q; }; d;' | head -n 1
#    fi
#}

machine=$1
shift 1

#user=${machine%@*}
#addr=$(lookup_host "${machine#*@}")

if [[ $1 == "-l" ]]; then
    ssh "$machine" "tmux list-sessions"
    exit 0
fi

if [[ $1 =~ \^.* ]]; then
    session=${1#^}
    shift 1
else
    session=$(date -u +"%Y%m%d%H%M%S")
fi

while true; do
    ssh "$@" -t -e none \
        -o ConnectTimeout=2 \
        -o ServerAliveCountMax=4 \
        -o ServerAliveInterval=2 \
        -o TCPKeepAlive=no \
    "$machine" bash -i -l -c "\"tmux -u -CC new-session -A -s $session\""
    case "$?" in
        (0) break;;
        (*) sleep 1;;
    esac
done