Blacklist devices used for /live/rootfs/* insted of /live/medium.

[live-boot-grml.git] / components / 9990-misc-helpers.sh

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 4c8383d..2515ea1 100755 (executable)
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -932,7 +932,17 @@ find_persistence_media ()
        white_listed_devices="${2}"
        ret=""
 
-       black_listed_devices="$(what_is_mounted_on /live/medium) $(what_is_mounted_on /live/findiso) $(what_is_mounted_on /live/fromiso)"
+       #
+       # The devices that are hosting the actual live rootfs should not be
+       # used for persistence storage since otherwise you might mount a
+       # parent directory on top of a sub-directory of the same filesystem
+       # in one union together.
+       #
+       black_listed_devices=""
+       for d in /live/rootfs/* /live/findiso /live/fromiso
+       do
+               black_listed_devices="${black_listed_devices} $(what_is_mounted_on d)"
+       done
 
        for dev in $(storage_devices "${black_listed_devices}" "${white_listed_devices}")
        do