[cups.general] Better way to add a filter to a printer ?

[Tom Schutzer-Weissmann]

I'm trying to add a filter to a printer so that it becomes a
pseudo-printer visible to Windows clients, but I'm not sure my approach
is a very good one - can anyone comment or suggest a better way?

All it needs to do is pipe the first page to one printer, and the rest
to a different printer. 

I replaced foomatic-rip in the PPD file with foo-foomatic-rip:
*cupsFilter:    "application/vnd.cups-postscript 0 foo-foomatic-rip"

and created a perl script called foo-foomatic-rip:
        
        #!/usr/bin/perl
        
        # pipe input to a temporary file
        my $tmpfile = $ENV{'TMPDIR'} . '/' . time ;
        
        open( TMP , ">$tmpfile") || die "$!" ;
        print TMP <STDIN> ;
        close TMP ;
        
        print STDERR "$tmpfile" ;
        $firstpage = $tmpfile . 'f' ;
        $rest = $tmpfile . 'r' ;
        
        `psselect -p1 $tmpfile $firstpage && cupsdoprint -P Headed
        $firstpage` ;
        `psselect -p2- $tmpfile $rest && cupsdoprint -P Unheaded $rest`
        ;
        
        unlink $tmpfile ;
        unlink $firstpage ;
        unlink $rest ;
        
Of course, if the damn printer honoured commands to change input tray,
none of this would be necessary :)

Thanks for your help,
Tom SW