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#!/bin/sh
# mrgrctrnl
# configurable ssh tunneler
# by Case Duckworth <acdw@acdw.net>
# version 0.1
# LICENSE: MIT
usage()
{
cat <<-END
mrgrctrnl: make magic ssh tunnels
usage: mrgrctrnl [-h] [-c CONF]
-h show this help
-c CONF use config file CONF.
. default: \$XDG_CONFIG_HOME/mrgrctrnl/config
END
exit "${1:-0}"
}
die()
{
[ "$#" -eq 0 ] && exit 1
case "$1" in
0-9*) ec="$1"; shift ;;
*) ec=1 ;;
esac
printf '!!%s: %s\n' "mrgrctrnl" "$*"
exit "$ec"
}
config="${XDG_CONFIG_HOME:=$HOME/.config}/mrgrctrnl/config"
pidf=/tmp/mrgrctrnl.pid
while getopts hc: opt; do
case "$opt" in
h) usage ;;
c) config="$OPTARG" ;;
\?) usage 2 ;;
*) usage 2 ;;
esac
done
shift "$((OPTIND - 1))"
[ -f "$config" ] || die "Need a config! Edit $config"
[ -e "$pidf" ] && {
while read -r pid; do
kill "$pid"
done < "$pidf"
rm "$pidf"
}
while read -r machine user local remote
do
while :
do
ssh -N "$user@$machine" -L "$local:$remote"
echo "$!" >> "$pidf"
sleep 3
done &
done < "$config"
wait
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