add image-update postinst dir and u-boot update script (#35)

Makefile

@@ -9,9 +9,10 @@ BINDIR = $(DESTDIR)/$(prefix)/bin
 LIBDIR = $(DESTDIR)/$(prefix)/lib/wb-utils
 PREPARE_LIBDIR = $(LIBDIR)/prepare
 RTC_LIBDIR = $(LIBDIR)/wb-gsm-rtc
+IMAGEUPDATE_POSTINST_DIR = $(DESTDIR)/$(prefix)/lib/wb-image-update/postinst
 
 install:
-	install -m 0755 -d $(BINDIR) $(LIBDIR) $(PREPARE_LIBDIR) $(RTC_LIBDIR)
+	install -m 0755 -d $(BINDIR) $(LIBDIR) $(PREPARE_LIBDIR) $(RTC_LIBDIR) $(IMAGEUPDATE_POSTINST_DIR)
 
 	install -m 0644 utils/etc_wb_env.sh $(DESTDIR)/etc/wb_env.sh
 
@@ -48,6 +49,9 @@ install:
 		utils/bin/wb-watch-update \
 		utils/bin/wb-run-update
 
+	install -m 0755 -t $(IMAGEUPDATE_POSTINST_DIR) \
+		utils/lib/wb-image-update/postinst/10update-u-boot
+
 clean:
 	@echo Nothing to do
 

debian/changelog

@@ -1,3 +1,9 @@
+wb-utils (3.4.0) stable; urgency=medium
+
+  * image-postinst: add script to update u-boot during factory reset
+
+ -- Nikita Maslov <[email protected]>  Thu, 20 Jan 2022 23:29:28 +0300
+
 wb-utils (3.3.0) stable; urgency=medium
 
   * support for factory restore fit on eMMC and new update mode in bootloader

utils/lib/wb-image-update/postinst/10update-u-boot

@@ -0,0 +1,35 @@
+#!/bin/sh -e
+
+# Called from install_update.sh with arguments
+# /path/to/script /path/to/new/rootfs [flag1 [flag2 ...]]
+#
+# This script may run in Busybox initramfs environment,
+# so if you need some special tools or features, use ones from rootfs.
+#
+# /dev, /proc and /sys are already bind-mounted
+# from host system to rootfs tree.
+
+if [ $# -lt 1 ]; then
+    echo "Usage: $0 path/to/rootfs [flag1 [flag2 ...]]"
+    exit 2
+fi
+
+ROOTFS="$1"
+shift
+FLAGS="$*"
+
+flag_set() {
+	echo "$FLAGS" | grep -- "--$1" >/dev/null 2>&1
+}
+
+if ! flag_set "factoryreset" ; then
+    echo "Skipping u-boot update (use factory reset to do it)"
+    exit
+fi
+
+if [ -e "$ROOTFS/usr/bin/u-boot-install-wb" ] ; then
+    echo "Trying to install u-boot using u-boot-install-wb from new rootfs"
+    chroot "$ROOTFS" /usr/bin/u-boot-install-wb --force
+else
+    echo "No u-boot installer found in new rootfs, skipping step"
+fi

utils/lib/wb-image-update/postinst/README

@@ -0,0 +1,20 @@
+Wiren Board image update postinst scripts
+=========================================
+
+Scripts from this directory are called in FIT image installation process
+after rootfs is extracted and device certificates are recovered.
+
+Scripts from NEW rootfs are used.
+
+Scripts are called NOT from this rootfs environment. They may be even
+called from Busybox minimal environment (initramfs in FIT images).
+If you need some tools from rootfs, use chroot.
+/dev, /proc and /sys are already mounted to rootfs here.
+
+Scripts are called in alphabetic order; you can use it by adding numeric
+prefixes to script names (e.g. 99-install-uboot.sh).
+
+Invokation of these scripts is performed in install_image.sh script
+(see https://github.com/wirenboard/wirenboard repo for more details).
+
+See 10update-u-boot script as an example.