From 192281ae3038a57d98c8e0a06bcab0bd8efa2fc7 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Sun, 25 Dec 2022 21:10:39 +0100
Subject: implement dual-boot for rockpi4-plus device

---
 package/fwupdate/Makefile                |  6 +++-
 package/fwupdate/files/fwupdate.postinst |  3 ++
 package/fwupdate/src/fwupdate            | 45 ++++++++++++++++++++--------
 package/fwupdate/src/fwvalidate          | 50 +++++++++++++++++++++++++++++---
 4 files changed, 87 insertions(+), 17 deletions(-)
 create mode 100644 package/fwupdate/files/fwupdate.postinst

(limited to 'package/fwupdate')

diff --git a/package/fwupdate/Makefile b/package/fwupdate/Makefile
index 8cf897ed4..738185fd9 100644
--- a/package/fwupdate/Makefile
+++ b/package/fwupdate/Makefile
@@ -5,7 +5,7 @@ include $(ADK_TOPDIR)/rules.mk
 
 PKG_NAME:=		fwupdate
 PKG_VERSION:=		1.0
-PKG_RELEASE:=		1
+PKG_RELEASE:=		2
 PKG_DESCR:=		update firmware
 PKG_SECTION:=		base/adk
 PKG_DEPENDS:=		mke2fs
@@ -27,5 +27,9 @@ fwupdate-install:
 	$(INSTALL_DIR) $(IDIR_FWUPDATE)/usr/sbin
 	$(INSTALL_BIN) $(WRKBUILD)/fwupdate $(IDIR_FWUPDATE)/usr/sbin
 	$(INSTALL_BIN) $(WRKBUILD)/fwvalidate $(IDIR_FWUPDATE)/usr/sbin
+	$(SED) "s/@@DISK@@/$(ADK_TARGET_ROOTDEV)/g" \
+		$(IDIR_FWUPDATE)/usr/sbin/fwupdate
+	$(SED) "s/@@DISK@@/$(ADK_TARGET_ROOTDEV)/g" \
+		$(IDIR_FWUPDATE)/usr/sbin/fwvalidate
 
 include ${ADK_TOPDIR}/mk/pkg-bottom.mk
diff --git a/package/fwupdate/files/fwupdate.postinst b/package/fwupdate/files/fwupdate.postinst
new file mode 100644
index 000000000..17871ff30
--- /dev/null
+++ b/package/fwupdate/files/fwupdate.postinst
@@ -0,0 +1,3 @@
+#!/bin/sh
+. $IPKG_INSTROOT/etc/functions.sh
+add_rcconf fwupdate NO
diff --git a/package/fwupdate/src/fwupdate b/package/fwupdate/src/fwupdate
index 1efe08339..68796d7bd 100755
--- a/package/fwupdate/src/fwupdate
+++ b/package/fwupdate/src/fwupdate
@@ -2,8 +2,22 @@
 # This file is part of the OpenADK project.
 # Do update.
 
-PART0="/dev/sda2"
-PART1="/dev/sda3"
+GRUB=$(which grub-reboot)
+if [ "${GRUB}" = "/usr/sbin/grub-reboot" ]; then
+  REVERSE=0
+else
+  REVERSE=1
+fi
+
+DISK=@@DISK@@
+
+if [ $REVERSE -eq 1 ]; then
+  PART0="/dev/${DISK}p1"
+  PART1="/dev/${DISK}p2"
+else
+  PART0="/dev/${DISK}2"
+  PART1="/dev/${DISK}3"
+fi
 
 # Name of the archive, which is the firmware. For this file is the checksum calculated and
 # checked against the one from the tar archive.
@@ -59,10 +73,12 @@ CURRENT_SYS="$(rdev /|awk '{ print $1 }')"
 case "$CURRENT_SYS" in
   "$PART0")
     MOUNTPART="$PART1"
+    PARTNUM=2
     OS=OpenADK2
     ;;
   "$PART1")
     MOUNTPART="$PART0"
+    PARTNUM=1
     OS=OpenADK1
     ;;
   *)
@@ -130,18 +146,23 @@ fi
 
 cd /
 umount $MOUNTPART
-grep /boot /proc/mounts 2>/dev/null
-if [ $? -eq 0 ]; then
-  mount -o remount,rw /boot
+if [ $REVERSE -eq 1 ]; then
+  echo "Switch bootable partition to new system"
+  sfdisk -A /dev/$DISK $PARTNUM >/dev/null 2>&1
 else
-  mount /dev/sda1 /boot
-fi
-grub-reboot $OS
 grep /boot /proc/mounts 2>/dev/null
-if [ $? -eq 0 ]; then
-  mount -o remount,ro /boot
-else
-  umount /boot
+  if [ $? -eq 0 ]; then
+    mount -o remount,rw /boot
+  else
+    mount /dev/sda1 /boot
+  fi
+  grub-reboot $OS
+  grep /boot /proc/mounts 2>/dev/null
+  if [ $? -eq 0 ]; then
+    mount -o remount,ro /boot
+  else
+    umount /boot
+  fi
 fi
 sync
 echo "Reboot now to the updated system $OS"
diff --git a/package/fwupdate/src/fwvalidate b/package/fwupdate/src/fwvalidate
index e87c5beed..f388da784 100755
--- a/package/fwupdate/src/fwvalidate
+++ b/package/fwupdate/src/fwvalidate
@@ -2,8 +2,22 @@
 # This file is part of the OpenADK project.
 # Validate update.
 
-PART0="/dev/sda2"
-PART1="/dev/sda3"
+GRUB=$(which grub-reboot)
+if [ "${GRUB}" = "/usr/sbin/grub-reboot" ]; then
+  REVERSE=0
+else
+  REVERSE=1
+fi
+
+DISK=@@DISK@@
+
+if [ $REVERSE -eq 1 ]; then
+  PART0="/dev/${DISK}p1"
+  PART1="/dev/${DISK}p2"
+else
+  PART0="/dev/${DISK}2"
+  PART1="/dev/${DISK}3"
+fi
 
 APPLIANCE_NAME=OpenADK
 
@@ -43,6 +57,24 @@ chk_initial_save(){
     echo "please save configuration"
   fi
 }
+
+updatebootflag(){
+
+  case "$CURRENT_SYS" in
+    "$PART1")
+      sfdisk -A /dev/$DISK 1
+      ;;
+    "$PART0")
+      sfdisk -A /dev/$DISK 2
+      ;;
+    *)
+      echo "Current partition $CURRENT_SYS not recognized"
+      exit 1
+      ;;
+  esac
+
+}
+
 updategrub(){
   
   mount -o remount,rw /boot
@@ -120,12 +152,22 @@ if [ $TESTS -eq $TESTSUM ]; then
     logger -t update "All Tests passed."
     if [ "x$1" = "x" ]; then
       logger -t update "Set default boot partition for bootloader."
+      mount -o remount,rw /
       rm /firmware_check
+      mount -o remount,ro /
       echo "System check was successful" >> $STAT_FILE
-      updategrub
+      if [ $REVERSE -eq 1 ]; then
+        echo "Nothing todo. All fine." 
+        logger -t update "Nothing todo. All fine."
+      else
+	updategrub
+      fi
     fi
 else
-    logger -t update "Not all tests passed. The the default system remains on the current partition."
+    if [ $REVERSE -eq 1 ]; then
+      updatebootflag
+    fi
+    logger -t update "Not all tests passed. The default system remains on the current partition."
     logger -t update "Please try to reboot the system and repeat the update."
     echo "ERROR last system update failed, please reboot and try again." >> $STAT_FILE
     exit 1
-- 
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