Christopher Haster 6ffc8d3480 Added simple custom attributes ...

A much requested feature (mostly because of littlefs's notable lack of
timestamps), this commits adds support for user-specified custom
attributes.

Planned (though underestimated) since v1, custom attributes provide a
route for OSs and applications to provide their own metadata in
littlefs, without limiting portability.

However, unlike custom attributes that can be found on much more
powerful PC filesystems, these custom attributes are very limited,
intended for only a handful of bytes for very important metadata. Each
attribute has only a single byte to identify the attribute, and the
size of all attributes attached to a file is limited to 64 bytes.

Custom attributes can be accessed through the lfs_getattr, lfs_setattr,
and lfs_removeattr functions.

2018-10-09 23:02:09 -05:00

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