Automatic Way to Tell if a FreeBSD system is 64 or 32-bit?

[Martin McCormick]

	Is there a FreeBSD command similar to the Linux arch
command?

	I have built a fairly decent Bourne shell script to run
just after installing mfsbsd on a target system. It figures out
the likely boot drive, formats it and then begins to build a
FreeBSD system on it. The script could intelligently ask for the
64-bit or 32-bit trees if it could determine whether it was
running on the i86 or 64-bit system.

Thank you.