init-live.sh: make $ROOT_MOUNT/media writable when necessary

If the live image is mounted as read-only, we cannot make necessary
directories under $ROOT_MOUNT/media, so trying to move the mount points
lead to errors.

So in case that no unification filesystem mechanism is available in kernel
and the rootfs is mounted as read-only, we mount tmpfs on $ROOT_MOUNT/media
so that it's possible to make necessary directories under it.

[YOCTO #4881]
[YOCTO #4103]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index 890c56280adfdb25abecdd48ff5345b1227729ea..861d87465784b723f13c3e7605541a7cbd25d8d8 100644 (file)
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -184,6 +184,8 @@ mount_and_boot() {
        "")
            if ! mount -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
                fatal "Could not mount rootfs image"
+           else
+               mount -t tmpfs -o rw,noatime,mode=755 tmpfs $ROOT_MOUNT/media
            fi
            ;;
     esac