>   | 	i propose to add this into libc.
> 
> do you intend to use it by other libc (or lib*) functions, or is this
> purely an "end user app" thing.  if the latter, is libutil more
> appropriate?
> 
> otherwise, looks useful.

	this was needed for BSD auth, but it is useful by itself so i thought
	of adding this alone first.  it could be in libutil or libc.  either
	is fine for me.

	(btw BSD auth logic will be in libutil, because login_cap is
	already there).

itojun