From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 3 May 2017 08:29:55 +0200
Subject: fstools: snapshot: handle jffs2 conversion using upgraded

We can reuse the kill_remaining and run_ramfs facilities of the stage2 run
by upgraded.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

diff --git a/package/system/fstools/files/snapshot b/package/system/fstools/files/snapshot
index eec7214032d1b147d5e989cd305c5c0cd1357a55..79be0d24bb68cc9b4ea8ce5b5d6b7558b2f0b0c5 100644
--- a/package/system/fstools/files/snapshot
+++ b/package/system/fstools/files/snapshot
@@ -64,14 +64,16 @@ do_convert_jffs2() {
 do_convert() {
 	. /lib/functions.sh
 	. /lib/upgrade/common.sh
-	ubus call system upgrade
-	touch /tmp/sysupgrade
+
 	cd /overlay
 	tar czf /tmp/snapshot.tar.gz *
-	kill_remaining TERM
-	sleep 3
-	kill_remaining KILL
-	run_ramfs '. /sbin/snapshot; do_convert_jffs2'
+
+	install_bin /sbin/upgraded
+	ubus call system sysupgrade "{
+		\"prefix\": \"$RAM_ROOT\",
+		\"path\": \"\",
+		\"command\": \". /sbin/snapshot; do_convert_jffs2\"
+	}"
 }
 
 [ -n "$(cat /proc/mounts|grep /overlay|grep jffs2)" ] && {