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# Scoville: The escaping overlay file system
Scoville is a [FUSE] overlay file system which works around the limited
character set allowed in FAT file names. FAT does not permit non-printable
characters in file names, nor does it allow the characters ‘*’, ‘?’, ‘<’, ‘>’,
‘|’, ‘"’, ‘:’, or ‘\\’. Many applications support applying a file name
translation map when placing files on FAT-formatted volumes; however, some –
notably [git-annex](https://git-annex.branchable.com/) – do not. For those
applications, Scoville may be the only way to work around some very unpleasant
ad-hoc schemes.
Usage is trivial: Run Scoville on an existing mounted file system. For example,
if you have a FAT-formatted SD card mounted on /media/sd, you can run `scoville
/media/sd`. When you’re done, unmount it with `fusermount -u`. While mounted,
Scoville will translate all forbidden characters to their URL-escaped versions.
For example, a file called ‘What Else Is There?.flac’ will be stored on disk as
‘What Else Is There%3f.flac’.
Beyond escaping, Scoville is exactly as capable as the file system it overlays.
If you want long file names, use vfat; if you want POSIX permissions, use
umsdos. (On the other hand, if you use umsdos, you don’t need to use Scoville,
since umsdos provides Scoville’s special character handling, albeit using a
different scheme.)
[FUSE]: https://github.com/libfuse/libfuse
## License
Scoville is licensed under the [Apache License, version 2.0][Apache-2].
[Apache-2]: https://www.apache.org/licenses/LICENSE-2.0
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