Add PINN restore support

export-noobs/00-release/files/partition_setup.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+#supports_backup in PINN
 
 set -ex
 
@@ -13,23 +14,25 @@ mount "$part1" /tmp/1
 mount "$part2" /tmp/2
 
 sed /tmp/1/cmdline.txt -i -e "s|root=[^ ]*|root=${part2}|"
-sed /tmp/2/etc/fstab -i -e "s|^.* / |${part2}  / |"
-sed /tmp/2/etc/fstab -i -e "s|^.* /boot |${part1}  /boot |"
+sed /tmp/2/etc/fstab -i -e "s|^[^#].* / |${part2}  / |"
+sed /tmp/2/etc/fstab -i -e "s|^[^#].* /boot |${part1}  /boot |"
 
-if [ -f /mnt/ssh ]; then
-  cp /mnt/ssh /tmp/1/
-fi
+if [ -z $restore ]; then
+  if [ -f /mnt/ssh ]; then
+    cp /mnt/ssh /tmp/1/
+  fi
 
-if [ -f /mnt/ssh.txt ]; then
-  cp /mnt/ssh.txt /tmp/1/
-fi
+  if [ -f /mnt/ssh.txt ]; then
+    cp /mnt/ssh.txt /tmp/1/
+  fi
 
-if [ -f /settings/wpa_supplicant.conf ]; then
-  cp /settings/wpa_supplicant.conf /tmp/1/
-fi
+  if [ -f /settings/wpa_supplicant.conf ]; then
+    cp /settings/wpa_supplicant.conf /tmp/1/
+  fi
 
-if ! grep -q resize /proc/cmdline; then
-  sed -i 's| init=/usr/lib/raspi-config/init_resize.sh||;s| quiet||2g' /tmp/1/cmdline.txt
+  if ! grep -q resize /proc/cmdline; then
+    sed -i 's| init=/usr/lib/raspi-config/init_resize.sh||;s| quiet||2g' /tmp/1/cmdline.txt
+  fi
 fi
 
 umount /tmp/1