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Enable expand on eMMc module #109

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Enable expand on eMMc module #109

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15 changes: 10 additions & 5 deletions pishrink.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -181,18 +181,23 @@ cat <<\EOF1 > "$mountdir/etc/rc.local"
do_expand_rootfs() {
ROOT_PART=$(mount | sed -n 's|^/dev/\(.*\) on / .*|\1|p')

BLK_NUM=mmcblk0
PART_NUM=${ROOT_PART#mmcblk0p}
if [ "$PART_NUM" = "$ROOT_PART" ]; then
echo "$ROOT_PART is not an SD card. Don't know how to expand"
return 0
PART_NUM=${ROOT_PART#mmcblk1p}
BLK_NUM=mmcblk1
if [ "$PART_NUM" = "$ROOT_PART" ]; then
echo "$ROOT_PART is not an SD card nor eMMc module. Don't know how to expand"
return 0
fi
fi

# Get the starting offset of the root partition
PART_START=$(parted /dev/mmcblk0 -ms unit s p | grep "^${PART_NUM}" | cut -f 2 -d: | sed 's/[^0-9]//g')
PART_START=$(parted "/dev/$BLK_NUM" -ms unit s p | grep "^${PART_NUM}" | cut -f 2 -d: | sed 's/[^0-9]//g')
[ "$PART_START" ] || return 1
# Return value will likely be error for fdisk as it fails to reload the
# partition table because the root fs is mounted
fdisk /dev/mmcblk0 <<EOF
fdisk "/dev/$BLK_NUM" <<EOF
p
d
$PART_NUM
Expand Down Expand Up @@ -323,4 +328,4 @@ fi
aftersize=$(ls -lh "$img" | cut -d ' ' -f 5)
logVariables $LINENO aftersize

info "Shrunk $img from $beforesize to $aftersize"
info "Shrunk $img from $beforesize to $aftersize"