v1.5 branch refresh based upon upstream master @ c8677ca89e53e3be7988d54280fce166cc894a7e

[librecmc/librecmc.git] / target / linux / sunxi / base-files / lib / upgrade / platform.sh

diff --git a/target/linux/sunxi/base-files/lib/upgrade/platform.sh b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
index f2cd970d428a780d7497d8802765c656a47ff421..88ef4790e9c1452f8ce57fe1c265ce47810830ee 100644 (file)
--- a/target/linux/sunxi/base-files/lib/upgrade/platform.sh
+++ b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
@@ -1,5 +1,28 @@
 platform_check_image() {
-       true
+       local diskdev partdev diff
+
+       export_bootdevice && export_partdevice diskdev -2 || {
+               echo "Unable to determine upgrade device"
+               return 1
+       }
+
+       get_partitions "/dev/$diskdev" bootdisk
+
+       #extract the boot sector from the image
+       get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
+
+       get_partitions /tmp/image.bs image
+
+       #compare tables
+       diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+
+       rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
+
+       if [ -n "$diff" ]; then
+               echo "Partition layout has changed. Full image will be written."
+               ask_bool 0 "Abort" && exit 1
+               return 0
+       fi
 }
 
 platform_copy_config() {
@@ -13,55 +36,54 @@ platform_copy_config() {
 }
 
 platform_do_upgrade() {
-       local diskdev partdev ibs diff
-
-       if export_bootdevice && export_partdevice diskdev -2; then
-               sync
-               if [ "$SAVE_PARTITIONS" = "1" ]; then
-                       get_partitions "/dev/$diskdev" bootdisk
-
-                       #get block size
-                       if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then
-                               ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")"
-                       else
-                               ibs=512
-                       fi
-
-                       #extract the boot sector from the image
-                       get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
-
-                       get_partitions /tmp/image.bs image
-
-                       #compare tables
-                       diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
-                       if [ -n "$diff" ]; then
-                               echo "Partition layout is changed.  Full image will be written."
-                               ask_bool 0 "Abort" && exit
-
-                               get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
-                               return 0
-                       fi
-
-                       #write uboot image
-                       get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 conv=notrunc
-                       #iterate over each partition from the image and write it to the boot disk
-                       while read part start size; do
-                               part="$(($part - 2))"
-                               if export_partdevice partdev $part; then
-                                       echo "Writing image to /dev/$partdev..."
-                                       get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync
-                               else
-                                       echo "Unable to find partition $part device, skipped."
-                               fi
-                       done < /tmp/partmap.image
-
-                       #copy partition uuid
-                       echo "Writing new UUID to /dev/$diskdev..."
-                       get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
+       local diskdev partdev diff
+
+       export_bootdevice && export_partdevice diskdev -2 || {
+               echo "Unable to determine upgrade device"
+               return 1
+       }
+
+       sync
+
+       if [ "$SAVE_PARTITIONS" = "1" ]; then
+               get_partitions "/dev/$diskdev" bootdisk
+
+               #extract the boot sector from the image
+               get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
+
+               get_partitions /tmp/image.bs image
+
+               #compare tables
+               diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+       else
+               diff=1
+       fi
+
+       if [ -n "$diff" ]; then
+               get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+
+               # Separate removal and addtion is necessary; otherwise, partition 1
+               # will be missing if it overlaps with the old partition 2
+               partx -d - "/dev/$diskdev"
+               partx -a - "/dev/$diskdev"
+
+               return 0
+       fi
+
+       #write uboot image
+       get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 count=1016 conv=fsync
+       #iterate over each partition from the image and write it to the boot disk
+       while read part start size; do
+               part="$(($part - 2))"
+               if export_partdevice partdev $part; then
+                       echo "Writing image to /dev/$partdev..."
+                       get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
                else
-                       get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+                       echo "Unable to find partition $part device, skipped."
                fi
+       done < /tmp/partmap.image
 
-               sleep 1
-       fi
+       #copy partition uuid
+       echo "Writing new UUID to /dev/$diskdev..."
+       get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
 }