Replaced rc.local modification with resize2fs_once init script

pishrink.sh

@@ -78,77 +78,26 @@ function set_autoexpand() {
         return
     fi
 
-    if [[ -f "$mountdir/etc/rc.local" ]] && [[ "$(md5sum "$mountdir/etc/rc.local" | cut -d ' ' -f 1)" != "1c579c7d5b4292fd948399b6ece39009" ]]; then
-      echo "Creating new /etc/rc.local"
-    if [ -f "$mountdir/etc/rc.local" ]; then
-        mv "$mountdir/etc/rc.local" "$mountdir/etc/rc.local.bak"
-    fi
-
-    #####Do not touch the following lines#####
-cat <<\EOF1 > "$mountdir/etc/rc.local"
-#!/bin/bash
-do_expand_rootfs() {
-  ROOT_PART=$(mount | sed -n 's|^/dev/\(.*\) on / .*|\1|p')
-
-  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
-  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')
-  [ "$PART_START" ] || return 1
-  # Return value will likely be error for fdisk as it fails to reload the
-  # partition table because the root fs is mounted
-  fdisk /dev/mmcblk0 <<EOF
-p
-d
-$PART_NUM
-n
-p
-$PART_NUM
-$PART_START
-
-p
-w
-EOF
-
-cat <<EOF > /etc/rc.local &&
+    cat <<EOF > "$mountdir/etc/init.d/expand-rootfs" &&
 #!/bin/sh
-echo "Expanding /dev/$ROOT_PART"
-resize2fs /dev/$ROOT_PART
-rm -f /etc/rc.local; cp -f /etc/rc.local.bak /etc/rc.local; /etc/rc.local
-
-EOF
-reboot
-exit
-}
-raspi_config_expand() {
+### BEGIN INIT INFO
+# Provides: expand-rootfs
+# Required-Start:
+# Required-Stop:
+# Default-Start: 3
+# Default-Stop:
+# Short-Description: Expands the root filesystem to fill device size
+# Description:
+### END INIT INFO
 /usr/bin/env raspi-config --expand-rootfs
-if [[ $? != 0 ]]; then
-  return -1
-else
-  rm -f /etc/rc.local; cp -f /etc/rc.local.bak /etc/rc.local; /etc/rc.local
-  reboot
-  exit
-fi
-}
-raspi_config_expand
-echo "WARNING: Using backup expand..."
-sleep 5
-do_expand_rootfs
-echo "ERROR: Expanding failed..."
-sleep 5
-if [[ -f /etc/rc.local.bak ]]; then
-  cp -f /etc/rc.local.bak /etc/rc.local
-  /etc/rc.local
-fi
+update-rc.d expand-rootfs remove
+rm /etc/init.d/expand-rootfs
+reboot
 exit 0
-EOF1
-    #####End no touch zone#####
-    chmod +x "$mountdir/etc/rc.local"
-    fi
+EOF
+
+    chmod +x "$mountdir/etc/init.d/expand-rootfs"
+    ln -s "../init.d/expand-rootfs" "$mountdir/etc/rc3.d/S01expand-rootfs" # Equivalent to update-rc.d expand-rootfs defaults
     umount "$mountdir"
 }