overlay-diskfile - Support for using diskfile filesystem.

overlay-diskfile is a support script for pre-mounting a diskfile to provide the LOWER or UPPER filesystem
       for a subhost. It is typically used in the subhost configuration to be invoked as part of determining the
       filesystem path.

Example1.UseawholediskfilefilesystemasLOWER

               LOWER=!overlay-diskfile mnt/ disk.img

       The above mounts the disk.img filesystem onto mnt and provides that as the LOWER filesystem.

       Example2.Useadiskfilepartition2asLOWER

               LOWER=!overlay-diskfile mnt/ disk.img 2

       The above mounts the second partition onto mnt and provides that as the LOWER filesystem.

       Example3.Useasubtreeofadiskfilepartition2asLOWER

               LOWER=!overlay-diskfile mnt/some/path disk.img 2

       The above mounts the second partition onto mnt and provides the path mnt/some/path that as the LOWER
       filesystem.

       Example4.UsesecondpartitiondiskfilefilesystemsubtreesforUPPERandWORK.

               UPPER=!overlay-diskfile mnt/some/upper/path disk.img 2
               WORK= mnt/some/work/path

       The above mounts the second partition of disk.img and uses mnt/some/upper/path as UPPER and
       mnt/some/work/path as WORK. Note that UPPER and WORK must always be subtrees from the same filesystem.

       overlay-diskfile - Support for using diskfile filesystem.

       no options.

overlay-boot, overlay-stop

                                                   2024-12-03                                OVERLAY-DISKFILE(8)

overlay-diskfilemount/path [ diskfile [ index ] ]