mount_msdos without iconv? (-L en_US.UTF-8 -D UTF-8 no worky)

Max Herrgard herrgard at
Fri Feb 15 16:06:55 PST 2019

Have you tried to play with the mount options -L and -D described in
mount_msdos(8)?  I haven't tried myself, but could be worth a shot.


On Fri, Feb 15, 2019 at 10:43 PM Mike Zhang <furry_for_puffy at>

> I have a bunch of files with unicode filenames that I'm trying to copy onto
> an MSDOS mount and what ends up happening is I get a bunch of invalid nodes
> that cannot be accessed in any way, including rm -rf /mymountpt/dir.  This
> seems to be because mount_msdos is trying to be too smart for its own good
> and convert character sets in a way that apparently results in invalid
> filenames sometimes.  I am using -L en_US.UTF-8 -D UTF-8 to mount the fs.
> I've already had to wipe the FAT table, re-newfs and restore from backup on
> OpenBSD because there was no other way to get rid of the invalid nodes (the
> nodes created by DragonFly are undeleteable even on OpenBSD).  As far as
> I'm
> aware, OpenBSD's mount_msdos treats each filename as a raw char *, to be
> passed through byte for byte without regard to charsets or code pages or
> what have you.  This is exactly the behavior I'm looking for.
> So my question is, is there any way to force raw, unconverted filenames on
> DragonFly?  I'd like to be able to use this thing on all my boxen without
> resorting to silliness like NFS exporting it from OpenBSD.
> Mike
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