ormaaj 1390365609 learn # user_input='-v _[more_input]' more_input='_[$(echo dont let this happen >&2)]'; printf $user_input foo ormaaj 1390367973 forget ormaaj 1390367987 learn # bash -c 'b=$2; printf $1' _ '-v _[b] foo' '_[$(echo dont let this happen >&2)]'