sample

ensure_privileged_inside_docker_container.sh

#!/bin/bash

function ensure_privileged_or_exit() {
    local cap_mask="0x00000007ffffffff"
    local cap_bnd=0x$(grep ^CapBnd /proc/self/status | awk '{print $2}')
    if [[ $(($cap_mask & $cap_bnd )) != $(($cap_mask)) ]]; then
        echo -e "[ERROR] Run with --privileged option."
        exit 1
    fi
}

### Main
ensure_privileged_or_exit