mount exfat with lower case filenames?

adrianmariano · 04-02-2022, 07:21 AM

I can mount a vfat file system with lower case filenames using the mount option shortname=lower, but I have not found a way to get the same result with exfat. (I also haven't found a list of mount options for exfat anywhere. It appears that mount.fuse does the mount and the list of mount options it gives appears to be incomplete, since for example, fmask isn't listed but does work. The behavior I get with a mounted exfat is a little funny: pre-existing files are shown in upper case, but I can create new files that display with any case, even mixed case. Of course, filenames on exfat aren't actually case sensitive, so a command like 'mv FOO foo' gives the error 'FOO' and 'foo' are the same file.

Running Ubuntu 21.04.

michaelk · 04-02-2022, 12:36 PM

mount.exfat-fuse is actually responsible for mounting exFAT filesystems.

https://www.systutorials.com/docs/li...nt.exfat-fuse/

And the behavior with regards to mix case is a known bug.

adrianmariano · 04-02-2022, 07:01 PM

I have no mount.exfat-fuse on my system, so the mount must be happening some other way.

Code:

adrian> ls /usr/sbin/mount*
 16 /usr/sbin/mount.fuse*          0 /usr/sbin/mount.ntfs@
  0 /usr/sbin/mount.lowntfs-3g@    0 /usr/sbin/mount.ntfs-3g@
120 /usr/sbin/mount.nfs*          36 /usr/sbin/mountstats*
  0 /usr/sbin/mount.nfs4@

But my behavior is consistent with that man page. So sounds like there's no solution, then.

michaelk · 04-02-2022, 07:24 PM

Dang it, exFAT is supported natively since kernel 5.4 so it isn't using fuse. Not sure how the native kernel module is different.