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busybox: init: check for zero-size *.md5 files

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busybox's md5sum applet does not fail if sizeof .md5 file is 0, so
in some rare cases (impropper shutdown before update / broken RPi sdcard)
we may updateto 0byte KERNEL/SYSTEM because md5 check didn't fail

closes #2788
This commit is contained in:
Stefan Saraev 2013-11-30 18:19:16 +02:00
parent 31c98b0649
commit 5c8d820330
1 changed files with 14 additions and 6 deletions
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20
packages/initramfs/sysutils/busybox-initramfs/scripts/init
View File

@ -477,14 +477,22 @@
# check md5 sums if .nocheck doesn't exist
if [ "$MD5_NOCHECK" -eq "0" ] ; then
if [ -f "$UPDATE_DIR/${UPDATE_KERNEL}.md5" -a -f "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" ] ; then
sed -i 's#target#/storage/.update#g' "$UPDATE_DIR/${UPDATE_KERNEL}.md5"
sed -i 's#target#/storage/.update#g' "$UPDATE_DIR/${UPDATE_SYSTEM}.md5"
# *.md5 size-check
SYSTEM_MD5_SIZE=$(stat -t "$UPDATE_DIR/${UPDATE_KERNEL}.md5" | awk '{print $2}')
KERNEL_MD5_SIZE=$(stat -t "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" | awk '{print $2}')
if [ "$SYSTEM_MD5_SIZE" -eq 0 -o "$KERNEL_MD5_SIZE" -eq 0 ] ; then
echo "zero-sized .md5 file..."
MD5_FAILED="1"
else
sed -i 's#target#/storage/.update#g' "$UPDATE_DIR/${UPDATE_KERNEL}.md5"
sed -i 's#target#/storage/.update#g' "$UPDATE_DIR/${UPDATE_SYSTEM}.md5"
echo "Checking ${UPDATE_KERNEL}.md5..."
md5sum -c "$UPDATE_DIR/${UPDATE_KERNEL}.md5" || MD5_FAILED="1"
echo "Checking ${UPDATE_KERNEL}.md5..."
md5sum -c "$UPDATE_DIR/${UPDATE_KERNEL}.md5" || MD5_FAILED="1"
echo "Checking ${UPDATE_SYSTEM}.md5..."
md5sum -c "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" || MD5_FAILED="1"
echo "Checking ${UPDATE_SYSTEM}.md5..."
md5sum -c "$UPDATE_DIR/${UPDATE_SYSTEM}.md5" || MD5_FAILED="1"
fi
else
echo "missing ${UPDATE_KERNEL}.md5 or ${UPDATE_SYSTEM}.md5..."
MD5_FAILED="1"