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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0+
# Copyright (C) 2020 Denis 'GNUtoo' Carikli
progname="install-uboot4extlinux.sh"
u_boot_with_spl="@u_boot_with_spl@"
u_boot_with_spl_offset=@u_boot_with_spl_offset@
usage()
{
echo "Usage: ${progname} [INSTALL_DEVICE]"
}
install_image()
{
install_device="$1"
offset="$2"
image="$3"
# We need root permissions for now:
# - blkid is used to bypass caching and it needs root access
if [ "$(id -u)" != 0 ] ; then
echo "Error: This script needs to be run as root"
exit 1
fi
# We only support MBR for now
# It will also catch errors like /dev/sdb1 and mmcbk0p1 as they
# don't have the PTTYPE tag
PTTYPE="$(blkid --probe --match-tag PTTYPE ${install_device} | \
awk '{print $2}' | sed 's#^PTTYPE="##' | sed 's#"$##')"
if [ -z "${PTTYPE}" ] ; then
echo "Error: Could not find an (MBR) formating inside " \
"${install_device}"
echo " Possible causes:"
echo " - Maybe {instal_device} is a partition"
echo " - or Maybe it's completelyor unformated"
exit 1
elif [ "${PTTYPE}" != "dos" ] ; then
echo "Error: ${install_device} is not in MBR format"
echo " Currently, only the MBR format is supported"
exit 1
fi
# Check if offset > MBR partition table part end
if [ ${offset} -lt 512 ] ; then
echo "Error: The offset (${offset}) is < 512"
echo " offsets < 512 aren't supported (yet)"
exit 1
fi
# Get the image size
image_size="$(du --bytes --apparent-size ${image} | awk '{print $1}')"
# With MBR, most partitioning tools leave makes the first partition
# start at 1MiB. So we need to check if the bootloader doesn't end
# up overwriting the first partition.
if [ $(expr ${image_size} + ${offset}) -gt $(expr 1024 \* 1024) ] ; then
echo "Error: ${image} is too big:"
echo " offset: ${offset}"
echo " size: ${image_size}"
echo " By default, "\
"partitioing tools makes the first partition start at 1MiB"
echo " Instaling ${images} "\
"would overwrite that first partition (if it's present)."
echo " Please contact the Parabola developers " \
"so they could fix that issue"
exit 1
fi
# Copies with with a block size of 1 can be quite slow in practice
if [ "$(expr ${offset} % 512)" = 0 ] ; then
dd conv=notrunc "if=${image}" "of=${install_device}" \
bs=512 "seek=$(expr ${offset} / 512)"
else
echo "Warning: slow copy"
dd conv=notrunc "if=${image}" "of=${install_device}" \
bs=1 "seek=${offset}"
fi
sync "${install_device}"
}
if [ $# -ne 1 ] ; then
usage
else
install_image "$1" "${u_boot_with_spl_offset}" "${u_boot_with_spl}"
fi
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