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If you want to use the Raspberry Pi UART, "console=serial0,115200" needs to be removed from the kernel cmdline. This is done by editing /boot/cmdline.txt. However, this file is not currently backed up during sysupgrade, so this effectively breaks HATs that require the use of the UART every sysupgrade. Backup this file during sysupgrade, and restore it before rebooting. Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
100 lines
2.4 KiB
Bash
100 lines
2.4 KiB
Bash
. /lib/functions.sh
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REQUIRE_IMAGE_METADATA=1
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# copied from x86's platform.sh
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platform_check_image() {
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local diskdev partdev diff
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[ "$#" -gt 1 ] && return 1
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export_bootdevice && export_partdevice diskdev 0 || {
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echo "Unable to determine upgrade device"
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return 1
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}
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get_partitions "/dev/$diskdev" bootdisk
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#extract the boot sector from the image
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get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
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get_partitions /tmp/image.bs image
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#compare tables
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diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
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rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
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if [ -n "$diff" ]; then
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echo "Partition layout has changed. Full image will be written."
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ask_bool 0 "Abort" && exit 1
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return 0
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fi
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return 0;
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}
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platform_do_upgrade() {
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local diskdev partdev diff
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export_bootdevice && export_partdevice diskdev 0 || {
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echo "Unable to determine upgrade device"
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return 1
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}
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sync
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if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
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get_partitions "/dev/$diskdev" bootdisk
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#extract the boot sector from the image
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get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
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get_partitions /tmp/image.bs image
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#compare tables
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diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
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else
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diff=1
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fi
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if [ -n "$diff" ]; then
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get_image "$@" | dd of="/dev/$diskdev" bs=2M conv=fsync
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# Separate removal and addtion is necessary; otherwise, partition 1
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# will be missing if it overlaps with the old partition 2
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partx -d - "/dev/$diskdev"
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partx -a - "/dev/$diskdev"
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return 0
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fi
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#iterate over each partition from the image and write it to the boot disk
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while read part start size; do
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if export_partdevice partdev $part; then
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echo "Writing image to /dev/$partdev..."
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get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
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else
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echo "Unable to find partition $part device, skipped."
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fi
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done < /tmp/partmap.image
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#copy partition uuid
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echo "Writing new UUID to /dev/$diskdev..."
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get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
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}
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platform_copy_config() {
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local partdev
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if export_partdevice partdev 1; then
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mkdir -p /boot
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[ -f /boot/kernel.img ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot
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cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE"
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tar -C / -zxvf "$UPGRADE_BACKUP" boot/cmdline.txt boot/config.txt
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sync
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unmount /boot
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fi
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}
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