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From: Peter Howlett <Peter.Howlett@ASG.unb.ca>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Printer filter file error
Date: Tue, 16 Jul 1996 18:14:06 +0000
Organization: Atlantic Systems Group
Lines: 74
Message-ID: <31EBDBEE.167EB0E7@ASG.unb.ca>
References: <4sd8g1$ruk@slowmo.techfak.uni-kiel.de> <31EB1D42.493B@www.play-hookey.com>
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Ken Bigelow wrote:
>
> Maciej Wiatr wrote:
> >
> > Salute,
> >
> > I use freeBSD with a HP DJ500C and a proper (as I think) filter file, which
> > has woreked. Yesterday I got to know it does not work any more.
> > As I could understand, there is an error by the execution of the filter file.
> > I have to tell my printer to use CR+LF, when it receives LF by
> > printf "\033&k2G", but it is not accepted. Printf (as well as cat)
> > do not send the first character of the given string to the printer,
> > so it cannot interprete the above string as a command.
> >
> > In my case the sh shell is used. Despite the error it isw possible to print
> > text files by sending a blank space before the command line, but ps files
> > don't work.
> >
> > Does anybody know the reason ? What happens with the first character ?
> >
> > Please HELP !
> >
>
> I can't say what happens to that first character; there are several
> possibilities. However, here's a suggestion for an alternative filter:
>
> Read the source (STDIN for the filter) one character at a time. If the
> character is LF, send CR to the printer (STDOUT). In any case, then send
> the character itself to STDOUT.
>
> This filter is real simple in C or any language that can read the input
> stream by characters, and won't skip any.
Indeed, I did this just a few days ago...
-------- lpfilter.c ---------------
#include <stdio.h>
int main()
{
int c;
for(c = fgetc(stdin); !feof(stdin); c = fgetc(stdin)) {
if ( c == 0x0a )
fputc( 0x0d, stdout );
fputc( c, stdout );
}
return 0;
}
-----------------------------------
gcc -o lpfilter lpfilter.c
I have another interesting question though... I have a print file
created with ghostscript (cdj550 driver) that I can send to my
deskjet 680c from dos with no problem. When I boot FreeBSD (2.1)
the file gets queued, then sits for a while, then spits out a blank
page (with 5 or 10 random chars at the top), then sits for a while
longer (1/2 to 1 hour for a full one page of text converted from
postscript text) then proceeds to print the page _very_ slowly.
Anyone ever seen this before?
BTW, I took out the descriptions for lpt1 and lpt2 in my kernel
config file, leaving only:
device lpt0 at isa? port? tty irq 7 vector lptintr
This shouldnt matter should it?
--------------------------------------------------------------------
Peter Howlett Atlantic Systems Group
E-Mail: Peter.Howlett@ASG.unb.ca Fredericton, N.B. Canada
http://www.ASG.unb.ca/personal/ph.html Phone: (506) 447-3050
PGP Key ID: 60F2EEC1 Fax: (506) 453-5004