mjhjmtu

I'm trying to create an fstab entry for /dev/fd0 so that user can mount a floppy formatted either with VFAT or ext32. The simple fstab entry

/dev/fd0 /mnt/floppy auto noauto,user,sync,gid=users,umask=000 0 2

can only mount DOS floppies. If I change the entry to

/dev/fd0 /mnt/floppy ext2 noauto,user,sync 0 2

then I can only mount a floppy with ext2 filesystem.
Obviously, I can issue a root mount command with appropriate -t option and mount either floppies. Is there a way to mount floppy as user with the simple command

mount /mnt/floppy

for floppies with either VFAT or ext2 filesystem?

From man 8 mount on Linux:

If no -t option is given, or if the auto type is specified,
mount will try to guess the desired type. Mount uses the blkid
library for guessing the filesystem type; if that does not turn
up anything that looks familiar, mount will try to read the file
/etc/filesystems, or, if that does not exist, /proc/filesystems.
All of the filesystem types listed there will be tried, except
for those that are labeled nodev (e.g. devpts, proc and nfs).
If /etc/filesystems ends in a line with a single *, mount will
read /proc/filesystems afterwards. While trying, all filesystem
types will be mounted with the mount option silent.

So just create a file /etc/filesystems containing something like this:

ext4
ext3
ext2
vfat
msdos
ntfs
iso9660
ufs
xfs

Add more filetypes if you need. Then you can use type auto in fstab.