Pathname identifying location of buffer .
An external format spec.
A buffer whose contents are examined.
Length (an integer) up to which buffer should be examined.
The result of reading the value returned from the
option as a Lisp expression in the
Looks in the file options (EMACS-style
line) for an option called
, with value
. If found, read
as a Lisp expression in the
package and return the result.