#!/bin/bash

btrcat()
{
        [ $# -ge 2 ] || return

        local src dst
        dst=${!#}
        truncate -s0 "$dst" || return

        while [ $# -ge 2 ]
        do
                src=$1
                ficlonerange.py "$src" "$dst" || return
                shift
        done
}

set -e
which ficlonerange.py >/dev/null

btrcat "$@"