[RFC] mount can figure out fstype automatically

[Christoph Hellwig]

On Sat, Jul 08, 2006 at 09:05:51AM -0700, Sam Leffler wrote:
> Linux has -t auto; haven't looked at how it works.

It's implemented in mount(8).  It has a table of magic numbers and offsets
and tries all of them in a well defined order.  If everything fails it
tries a few heuristics whether the filesystems might be a FAT filesystem
as thos don't have magic numbers.