Date: Sat, 29 Apr 1995 21:39:38 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: andreas@knobel.gun.de (Andreas Klemm) Cc: freebsd-hackers@FreeBSD.org (FreeBSD hackers) Subject: Re: aspfilter & stdin Message-ID: <199504291939.VAA00553@uriah.heep.sax.de> In-Reply-To: <199504291421.QAA02416@knobel.GUN.de> from "Andreas Klemm" at Apr 29, 95 04:21:19 pm
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As Andreas Klemm wrote:
>
> > Boy, he tries to rewind a pipe from a separate _process_! This is
> > impossible.
>
> I got this from someone to eliminate the need for a tmp file, when
> printing dvi files using dvips. It worked for Linux Slackware like
> charm, as well as for FreeBSD 1.1.5.1.
My fault. Someone else clarified this in private mail; the rewind
is actually on a disk file, of course.
> FreeBSD 2.0 introduces something new, which made this necessary:
>
> #ifdef __FreeBSD__
NOOO!
I'm not sure which systems define the 2nd parameter of lseek() to
be off_t. Anyway, from /usr/ports/GUIDELINES:
0.2 The preferred way to tell 4.3BSD/Reno and newer versions of the BSD code
apart is by using the "BSD" macro defined in <sys/param.h>. Hopefully that
file is already included; if not, add the code:
* #ifdef _HAVE_PARAM_H
* #include <sys/param.h>
* #endif
to the proper place in the .c file and add -D_HAVE_PARAM_H to the
CFLAGS in the Makefile.
Then, you may use:
#if (defined(BSD) && (BSD >= 199103))
to detect if the code is being compiled on a 4.3 Net2 code base or
newer (e.g. FreeBSD 1.x, 4.3/Reno, NetBSD 0.9, 386BSD, BSD/386 1.0).
* Use:
*
* #if (defined(BSD) && (BSD >= 199306))
*
* to detect if the code is being compiled on a 4.4 code base or newer
* (e.g. FreeBSD 2.x, 4.4, NetBSD 1.0, BSD/386 1.1).
The change is required for ALL 4.4BSD based systems!
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)
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