#!/bin/bash

# Return a list of mount points that are internal OSX system volumes
function getInternalOSXSystemVolumes {
    local mounted_devices=
    mounted_devices=$(mount | sed -nE 's#^(/dev/disk[0-9]+s[0-9]+).*#\1#p')

    # Iterate over all devices to get information
    for device in $mounted_devices; do
        local mount_point=
        while read -r -u3 device_info; do
            case "$device_info" in
                *Mount*Point:*) mountPoint=$(echo "$device_info" | sed -n 's/.*Mount Point: *//p') ;;
                *Internal:*)    internal=$(echo "$device_info" | sed -n 's/.*Internal: *//p') ;;
            esac
        done 3< <(diskutil info $device)
        if [[ -n "$mountPoint" && "$internal" == Yes ]]; then
            # Check if volume is a system volume
            if [[ -f "${mountPoint}/System/Library/CoreServices/boot.efi" ]]; then
                echo "$mountPoint"
            fi
        fi
    done
}

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