diskimage-builder/elements/vm/block-device.d/10-partition

#!/bin/bash

if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

source $_LIB/die
[ -n "$IMAGE_BLOCK_DEVICE" ] || die "Image block device not set"

# Create 2 partitions for PPC, one for PReP boot and other for root
if [[ "$ARCH" =~ "ppc" ]] ; then
    sudo parted -a optimal -s $IMAGE_BLOCK_DEVICE \
        mklabel msdos \
        mkpart primary 0 8cyl \
        set 1 boot on \
        set 1 prep on \
        mkpart primary 9cyl 100%
else
    sudo parted -a optimal -s $IMAGE_BLOCK_DEVICE \
        mklabel msdos \
        mkpart primary 1MiB 100% \
        set 1 boot on
fi

sudo partprobe $IMAGE_BLOCK_DEVICE

# To ensure no race conditions exist from calling partprobe
sudo udevadm settle

# If the partition isn't under /dev/loop*p1, create it with kpartx
DM=
if [ ! -e "${IMAGE_BLOCK_DEVICE}p1" ]; then
    DM=${IMAGE_BLOCK_DEVICE/#\/dev/\/dev\/mapper}
    # If running inside Docker, make our nodes manually, because udev will not be working.
    if [ -f /.dockerenv ]; then
        # kpartx cannot run in sync mode in docker.
        sudo kpartx -av $TMP_IMAGE_PATH
        sudo dmsetup --noudevsync mknodes
    else
        sudo kpartx -asv $TMP_IMAGE_PATH
    fi
elif [[ "$ARCH" =~ "ppc" ]]; then
    sudo kpartx -asv $TMP_IMAGE_PATH
fi

if [ -n "$DM" ]; then
    echo "IMAGE_BLOCK_DEVICE=${DM}p1"
elif [[ "$ARCH" =~ "ppc" ]]; then
    DM=${IMAGE_BLOCK_DEVICE/#\/dev/\/dev\/mapper}
    echo "IMAGE_BLOCK_DEVICE=${DM}p2"
else
    echo "IMAGE_BLOCK_DEVICE=${IMAGE_BLOCK_DEVICE}p1"
fi