Date: Sat, 29 Apr 1995 16:12:58 +0200 (MET DST) From: Andreas Klemm <andreas@knobel.gun.de> To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Cc: rpt@miles.sso.loral.com, hackers@FreeBSD.org Subject: Re: aspfilter & stdin Message-ID: <199504291412.QAA02380@knobel.GUN.de> In-Reply-To: <199504161930.MAA07697@gndrsh.aac.dev.com> from "Rodney W. Grimes" at Apr 16, 95 12:30:23 pm
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> > Gentlemen,
> > For the last three days I have been trying to make 'apsfilter' work
> > on my 2.0R system. I have learned a lot, but have hit a final sticking
> > point.
> >
> > 'apsfilter' is started by the lpd. It tries to determine the type of
> > file that is being printed. Unfortunately, it uses `file -` to determine
> > the type of file. A companion program is supplied called 'rewindstdin'.
> >
> > main()
> > {
> > return lseek(0,0L,0) < 0;
> > }
>
> Is that the sole content of the file? No #includes?? If so try this
> program:
>
> #include <unistd.h>
> int
> main()
> {
> return (lseek(0,0L,0) < 0);
> }
>
> The problem could be that without including unistd.h the arg types to
> the lseek call are wrong (FreeBSD uses a 64Bit offset). Thus the third
> argument to lseek was trash, and that is the whence argument :-(.
Apsfilter 4.9 delta (newest one):
#ifdef __FreeBSD__
#include <unistd.h>
#endif
main()
{
#ifdef __FreeBSD__
return lseek(STDIN_FILENO, (off_t)0, SEEK_SET) < 0;
#else
return lseek(0,0L,0) < 0;
#endif
}
Apsfilter worked ok for 1.1.5.1 and 2.0 that way.
--
andreas@knobel.gun.de /\/\___ Wiechers & Partner Datentechnik GmbH
Andreas Klemm ___/\/\/ - Support Unix - akl@wup.de -
*** apsfilter - irgendwie clever ***
ftp.informatik.rwth-aachen.de:/pub/Linux/local/packs/APSfilter/aps-49...:-)
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