🚀 go-pugleaf

In article <1992Dec16.040749.3041@hawkmoon.mn.org> det@hawkmoon.mn.org (Derek Terveer) writes:
>Thomas Jagodits (jagodits@vega2.wrc.Xerox.COM) wrote:
>: In article <1992Dec14.034005.13663@hawkmoon.mn.org> det@hawkmoon.mn.org (Derek Terveer) writes:
>: >I am having problems with the getminor() call.  I am making some calls
>: >to getminor() in order to extract the minor numbers, according to the
>: >ddi/dki ref manual:
>: >__minor                             sdsg/Driver.o
>: >__major                             sdsg/Driver.o
>: >__makedev                           sdsg/Driver.o
>:
>:  Did you miss to include <sys/sysmacros.h> ?
>:  All the listed undefined are there.
>
>I did have <sys/sysmacros.h> included and I still got those undefined
>externs.  Then, while looking through the <sys/ddi.h> file I came upon
>the following section:
>/* The following declarations take the place of macros in
> * sysmacros.h The undefs are for any case where a driver includes
> * sysmacros.h, even though DDI conforming drivers must not.
  ...
>This led me to believe that I should not include sysmacros.h.  Is this
>an incorrect assumption?

From "Writing a Unix Device Driver" (2nd Edition):
    "If you are using System V Release 4.0 and want to be compatible with the
    DDI and the DKI, ddi.h must be included *last*. ddi.h will undefine
    several macros that may be declared in /usr/include/sys/sysmacros.h and
    replace these with function calls."

This still doesn't answer your main question, but seemed relevant (and worth
broadcasting).

By the way, the new second edition of this book is very well worth getting
(especially now that it's in paperback). It's a damned shame that the authors
can't explain their topics more clearly and that they are not more organized,
but there is, at the very least, a wealth of tidbits, such as the above,
throughout the book. Also, there are several tables comparing SysV3, SysV4,
and BSD Unix device driver details. Info is:

    by Egan & Teixeira
    Publisher: Wiley
    ISBN: O-471-53575-3

-- 
Bill Fulton            (Home Alone) |    Grab .. 
    bill@wafbox.gwinnett.com        |            The ..
OR  ..!gatech!dcatla!wafbox!bill    |                   Reins