#!/bin/sh

fsck_able() {
    _drv="_drv=echo fsck_drv_com"
}

fsck_drv_com() {
    local _out
    echo "issuing $_drv hello"
    _out=$($_drv hello world)
    echo $_out
}

fsck_single() {
    local _drv
    fsck_able
    eval "$_drv"
}

fsck_single