unionfs Union File System

This is at trivial test of the Union File System. See nuttx/fs/unionfs/README.txt. Dependencies:

  • CONFIG_DISABLE_MOUNTPOINT – Mountpoint support must not be disabled.

  • CONFIG_FS_ROMFS – ROMFS support is required.

  • CONFIG_FS_UNIONFS – Union File System support is required.

Configuration options. Use the defaults if you are unsure of what you are doing:

  • CONFIG_EXAMPLES_UNIONFS – Enables the example.

  • CONFIG_EXAMPLES_UNIONFS_MOUNTPT – Mountpoint path for the Union File System.

  • CONFIG_EXAMPLES_UNIONFS_TMPA – Temporary mount point for file system 1.

  • CONFIG_EXAMPLES_UNIONFS_TMPB – Temporary mount point for file system 2.

  • CONFIG_EXAMPLES_UNIONFS_RAMDEVNO_A – ROMFS file system 1 RAM disk device number.

  • CONFIG_EXAMPLES_UNIONFS_RAMDEVNO_B – ROMFS file system 2 RAM disk device number.

  • CONFIG_EXAMPLES_UNIONFS_SECTORSIZE – ROM disk sector size.

See SIM page for a walk-through of the output of this text.