I'm a long time user (and have even submitted patches) of busybox. One of the regular problems I have to deal with is working with FAT32 file systems using busybox. It is really a hassle that fatattr(1) isn't supported under busybox. I'd do it myself, but I just don't have the time. So, the best I can do is submit an enhancement request. Given that lsattr and chattr are supported, I'd think that supporting fatattr shouldn't be a big deal. Given that busybox supports creating and checking FAT32 file systems, not having fatattr(1) seems like it's almost a bug (only 2 out of 3 components required for working with FAT32 are present, yet for EXT2 3 out of 3 components are present). Keep up the good work.
Applied to git.