1 files changed, 88 insertions, 0 deletions
diff --git a/libre/uboot4extlinux-sunxi/install-uboot4extlinux.sh.in b/libre/uboot4extlinux-sunxi/install-uboot4extlinux.sh.in
new file mode 100644
index 000000000..1c744f313
--- /dev/null
+++ b/libre/uboot4extlinux-sunxi/install-uboot4extlinux.sh.in
@@ -0,0 +1,88 @@
+#!/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