cysh

#!/bin/bash

# https://news.ycombinator.com/item?id=5017108
# http://test.saurik.com/hackernews/cysh.sh

function title() {
    echo -ne $'\e]2;'"$@"$'\a\e]1;'"$@"'\a'
}

function cysh() {
    data=$1
    name=$2
    shift 2

    user=${data%@*}
    host=${data#*@}

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

    title "${name}"
    name=${name//"'"/$'\'\\\'\''}

    while [[ 1 ]]; do
        ssh "$@" -t -e none \
            -o ConnectTimeout=2 \
            -o ServerAliveCountMax=4 \
            -o ServerAliveInterval=2 \
            -o TCPKeepAlive=no \
        "${user}@${addr}" "screen -dRS '${name}'"

        case "$?" in
            (0) break;;
            (*) sleep 1;;
        esac
    done
}

cysh "$@"