On 10.11.22 13:45, Quirin Gylstorff wrote:

From: Quirin Gylstorff <quirin.gylstorff@...>

This patch adds a pre/post function to the swupdate-handler
roundrobin to compare the uuid parameter from the sw-description
with the uuid of the current system to avoid a updating with
the same image and breaking the update cycle.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@...>
---
...-add-uuidcheck-to-roundrobin-handler.patch | 43 +++++++++++++++++++
.../swupdate-handler-roundrobin_0.1.bb | 3 ++
2 files changed, 46 insertions(+)
create mode 100644 recipes-core/swupdate-handler-roundrobin/files/0001-add-uuidcheck-to-roundrobin-handler.patch

diff --git a/recipes-core/swupdate-handler-roundrobin/files/0001-add-uuidcheck-to-roundrobin-handler.patch b/recipes-core/swupdate-handler-roundrobin/files/0001-add-uuidcheck-to-roundrobin-handler.patch
new file mode 100644
index 0000000..f2392f4
--- /dev/null
+++ b/recipes-core/swupdate-handler-roundrobin/files/0001-add-uuidcheck-to-roundrobin-handler.patch
@@ -0,0 +1,43 @@
+From f093a3a097e518ef9f74ff88eafa9259ba50626f Mon Sep 17 00:00:00 2001
+From: Quirin Gylstorff <quirin.gylstorff@...>
+Date: Tue, 8 Nov 2022 16:08:25 +0100
+Subject: [PATCH] add uuidcheck to roundrobin handler
+
+Signed-off-by: Quirin Gylstorff <quirin.gylstorff@...>
+---
+ swupdate_handlers_roundrobin.lua | 22 ++++++++++++++++++++++
+ 1 file changed, 22 insertions(+)
+
+diff --git a/swupdate_handlers_roundrobin.lua b/swupdate_handlers_roundrobin.lua
+index bf9c997..bb24fc7 100644
+--- a/swupdate_handlers_roundrobin.lua
++++ b/swupdate_handlers_roundrobin.lua
+@@ -726,3 +726,25 @@ function pp_mmclock(when, device, image)
+ swupdate.info("%s: %s MMC device %s", logprefix, when == WHEN.PRE and "Unlocked" or "Locked", device)
+ return true
+ end
++
++function pp_uuidcheck(when, uuid, image)
++ local filename = "/etc/os-release"
++ local filehandle = io.open(filename, "rb")
++ if not filehandle then
++ swupdate.error("%s: Cannot open file %s", logprefix, filename)
++ return false
++ end
++ osrelease = filehandle:read("*a")
++ filehandle:close()
++ image_uuid = string.match(osrelease, "IMAGE_UUID.*")
++ if not image_uuid then
++ swupdate.error("%s: Cannot find IMAGE_UUID in %s", logprefix, filename)
++ return false
++ end
++ swupdate.debug("%s: %s", logprefix, image_uuid, uuid)
++ if string.find(image_uuid, uuid, 1, true) then
++ swupdate.error("%s: Update already installed.", logprefix)
++ return false
++ end
++ return true
++end
+--
+2.35.1
+
diff --git a/recipes-core/swupdate-handler-roundrobin/swupdate-handler-roundrobin_0.1.bb b/recipes-core/swupdate-handler-roundrobin/swupdate-handler-roundrobin_0.1.bb
index 65cd652..447a093 100644
--- a/recipes-core/swupdate-handler-roundrobin/swupdate-handler-roundrobin_0.1.bb
+++ b/recipes-core/swupdate-handler-roundrobin/swupdate-handler-roundrobin_0.1.bb
@@ -13,8 +13,11 @@ inherit dpkg-raw
PROVIDES = "swupdate-handlers"
SRC_URI += "git://gitlab.com/cip-project/cip-sw-updates/swupdate-handler-roundrobin.git;protocol=https;destsuffix=swupdate-handler-roundrobin;name=swupdate-handler-roundrobin;nobranch=1"
+SRC_URI += "file://0001-add-uuidcheck-to-roundrobin-handler.patch"

Can we upstream that directly? It's a CIP sub-project - should be doable. ;)

SRCREV_swupdate-handler-roundrobin ?= "fbc8d8a7e4ae8c381198cab81ae3fb13398a028e"
+S="${WORKDIR}/${PN}"

Unrelated or even unneeded change?

+
SWUPDATE_LUASCRIPT = "swupdate-handler-roundrobin/swupdate_handlers_roundrobin.lua"
SWUPDATE_ROUND_ROBIN_HANDLER_CONFIG ?= "swupdate.handler.${SWUPDATE_BOOTLOADER}.ini"

Jan