#!/bin/bash
fifo_in="/tmp/ssh-fifo.$$"

exit_trap() {
        unlink "$fifo_in"
        echo "goodbye."
}
trap exit_trap EXIT

mkfifo "$fifo_in"

ssh -T mute@localhost <"${fifo_in}" | {
        exec 10>"$fifo_in"

        # send a command to remote host)
        echo "uname -a" >&10

        # input still come from stdin (the pipe)
        read -r line
        if [[ $line =~ "2.6.32" ]]; then
                echo "omg this guy should upgrade";
        fi
}