ISO/archiso/initcpio/hooks/archiso_loop_mnt

#!/bin/ash

run_hook () {
    # shellcheck disable=SC2154 # defined via initcpio's parse_cmdline()
    [ -n "${img_label}" ] && img_dev="/dev/disk/by-label/${img_label}"
    [ -z "${img_flags}" ] && img_flags="defaults"
    # shellcheck disable=SC2154 # defined via initcpio's parse_cmdline()
    if [ -n "${img_dev}" ] && [ -n "${img_loop}" ]; then
        export mount_handler="archiso_loop_mount_handler"
    fi
}

archiso_loop_mount_handler () {
    newroot="${1}"

    local _dev_loop

    msg ":: Setup a loop device from ${img_loop} located at device ${img_dev}"
    _mnt_dev "${img_dev}" "/run/archiso/img_dev" "-r" "${img_flags}"
    # shellcheck disable=SC2154 # defined via initcpio's parse_cmdline()
    if [ "${copytoram}" != "y" ]; then
        readlink -f "${img_dev}" >> /run/archiso/used_block_devices
    fi

    if _dev_loop=$(losetup --find --show --read-only "/run/archiso/img_dev/${img_loop}"); then
        export archisodevice="${_dev_loop}"
    else
        echo "ERROR: Setting loopback device for file '/run/archiso/img_dev/${img_loop}'"
        launch_interactive_shell
    fi

    archiso_mount_handler "${newroot}"

    if [ "${copytoram}" = "y" ]; then
        losetup -d "${_dev_loop}" 2>/dev/null
        umount /run/archiso/img_dev
    fi
}

# vim: set ft=sh: