[rescue] Password validation

[Sheldon T. Hall]

Is there a simple way to check someone's password from a shell script?  I.e.
have them enter their system password and be sure that's actually their
password on a pass/fail basis?  I expect I could use `expect` but I'd prefer
something that would be a standard part of UNIX.

Thanks.

-Shel
--
Sheldon T. Hall
shel at cmhc.com
206-780-7971 (CMHC)
206-842-2858 (Home)