iso-scan: Release resources on iso-scan boots with rd.live.ram

Unmounting the image iso, detaching its loop device, and unmounting
its parent partition can simplify installation to the parent disk.

Note that programs or scripts using the /run/initramfs/live mount
point will fail.

diff --git a/modules.d/90dmsquash-live/apply-live-updates.sh b/modules.d/90dmsquash-live/apply-live-updates.sh
index 3df2d4ad865df98bb4d415428c3f0d53456ddabe..838445ef28bb9ad6d7ab5fc3820b03ff5fc5a64a 100755 (executable)
--- a/modules.d/90dmsquash-live/apply-live-updates.sh
+++ b/modules.d/90dmsquash-live/apply-live-updates.sh
@@ -18,3 +18,9 @@ if [ -h /dev/root ] && [ -d /run/initramfs/live/updates -o -d /updates ]; then
     done
     umount $NEWROOT/run
 fi
+# release resources on iso-scan boots with rd.live.ram
+if [ -d /run/initramfs/isoscan ] &&
+   [ -f /run/initramfs/squashed.img -o -f /run/initramfs/rootfs.img ]; then
+    umount --detach-loop /run/initramfs/live
+    umount /run/initramfs/isoscan
+fi