osi-tools/osi-mount

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#!/usr/bin/env bash
# 2018 Luke Shumaker
{
set -euE
source "${BASH_SOURCE[0]%/*}/lib/osi.sh"
needs_root
arg_device=$1
arg_mountpoint=$2
arg_cmd=("${@:3}")
unshare --mount sh -c "mount --make-rslave / && mount -- ${arg_device@Q} ${arg_mountpoint@Q} && exec -- ${arg_cmd[@]@Q}"
}