From be55fa4c829bf42fbdd0f1d01b74ec512891f4cc Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnelson@gmail.com>
Date: Thu, 24 Jul 2014 19:54:49 -0500
Subject: [PATCH] mk_mmc.sh: bring in zz-uenv_txt

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
---
 lib/shared/zz-uenv_txt | 25 +++++++++++++++++++++++++
 mk_mmc.sh              |  4 ++++
 2 files changed, 29 insertions(+)
 create mode 100644 lib/shared/zz-uenv_txt

diff --git a/lib/shared/zz-uenv_txt b/lib/shared/zz-uenv_txt
new file mode 100644
index 0000000..6f665d8
--- /dev/null
+++ b/lib/shared/zz-uenv_txt
@@ -0,0 +1,25 @@
+#!/bin/sh -e
+
+version="$1"
+
+if [ -f /boot/uEnv.txt ] ; then
+
+	# passing the kernel version is required
+	if [ -z "${version}" ]; then
+		echo >&2 "W: zz-uenv_txt: ${DPKG_MAINTSCRIPT_PACKAGE:-kernel package} did not pass a version number"
+		exit 2
+	fi
+
+	unset older_kernel
+	older_kernel=$(grep uname_r /boot/uEnv.txt | grep -v '#' | awk -F"=" '{print $2}' || true)
+
+	if [ ! "x${older_kernel}" = "x" ] ; then
+		if [ ! "x${older_kernel}" = "x${version}" ] ; then
+			echo "zz-uenv_txt: Updating /boot/uEnv.txt [uname_r=${version}]"
+			sed -i -e 's:uname_r='${older_kernel}':uname_r='${version}':g' /boot/uEnv.txt
+		fi
+	else
+		echo "uname_r=${version}" >> /boot/uEnv.txt
+	fi
+fi
+
diff --git a/mk_mmc.sh b/mk_mmc.sh
index 27feab0..0b9781d 100755
--- a/mk_mmc.sh
+++ b/mk_mmc.sh
@@ -852,6 +852,9 @@ finish_installing_device () {
 
 		        chroot /target /bin/bash /usr/bin/finish-install.sh
 
+		        cp /zz-uenv_txt /target/etc/kernel/postinst.d/
+		        chmod +x /target/etc/kernel/postinst.d/zz-uenv_txt
+
 		        rm -f /target/mounts || true
 
 		        cat /proc/mounts > /target/boot/uboot/backup/proc_mounts
@@ -926,6 +929,7 @@ initrd_preseed_settings () {
 
 	finish_installing_device
 	setup_parition_recipe
+	cp -v "${DIR}/lib/shared/zz-uenv_txt" ${TEMPDIR}/initrd-tree/zz-uenv_txt
 	cp -v "${DIR}/lib/${DIST}-preseed.cfg" ${TEMPDIR}/initrd-tree/preseed.cfg
 
 	#repos.rcn-ee.net: add linux-image-${uname -r}