#!/usr/pkg/bin/perl -w

use strict; 
no strict "vars";

my $printcap="/etc/printcap";
my $filterdir="/usr/pkg/libexec/magicfilter/";
my $force=0;
my $m=0;

if ($#ARGV >= 0) { 
  $force=($ARGV[0] eq "--force"); if ($force) { $m++; }
}

if ($m <= $#ARGV) { $printcap=$ARGV[$m]; }

sub input
{
  my($message)=$_[0];
  my($defanswer)=$_[1];
  my($reply);

  printf "%-45s [%-15s]: ",$message,$defanswer; 
  $reply=<STDIN>; chop($reply); if ($reply eq "") { $reply=$defanswer; }
 
  return $reply;
}

sub yninput
{
  my($message)=$_[0];
  my($defanswer)=$_[1];
  my($reply);

  printf "%s? (y/n) [%s]: ",$message,$defanswer; 
  $reply=<STDIN>; chop($reply); if ($reply eq "") { $reply=$defanswer; }
 
  return $reply;
}

sub readfilters
{
  my($i);

  if ( ! -e $filterdir ) {
  print<<EOT;

The magicfilter package is wrongly installed; can\'t find $filterdir.

EOT

    die "'$filterdir' missing, stopped";
  }
  
  open(FILTERS, "ls $filterdir/*-filter|sort|") || die "Can't find $filters.";
  $i=0;
  while (<FILTERS>) {
    chop;
    s/$filterdir\/(.*)-filter/$1/g;
    $filters[$i]=$_; $i++;
  }
  close(FILTERS);

  foreach $entry (@filters) { $entry =~ s/-filter//g; }
  return sort(@filters);
}

if ( -e $printcap && !$force) {
  print<<EOT;

You already have an $printcap file installed.
I assume that it is already correctly configured and won\'t overwrite it.
(if $printcap is not correctly configured, delete the file and re-run 
 $0 or run '$0 --force').

EOT
  exit 0;
} 

@filters=&readfilters;

$ok="no"; $m=-1; $d=0;
while ($ok !~ /y(es)?/) {
  print<<EOT;
  
You will have to supply the following items for each printer to be installed
(example values in parentheses):

 - its short name and its full name            (hpjlet4, HP LaserJet 4)
 - the device where the printer is attached    (/dev/lp1)
 - and the input filter you want to use        (ljet4l)

EOT

  $p=-1;
  do
  {
    $p++; $m++; $full[$m+1]='done';

    if ($p == 0) { $full[$p]='HP Laserjet 4L'; } 
    else         { $full[$p]='done'; }

    $short[$p]='hplj4l';
    $dev[$p]=sprintf("/dev/lp%d",$p+1); $ifilter[$p]='ljet4l';
    $remflags[$p]=""; $serflags[$p]="";

    printf "Printer #%d:\n", $p+1;
    printf "------------\n";

       $full[$p]=&input("Full name, `done' when done", $full[$p]);
 
    if ($full[$p] !~ /done\s*/) { 
      $short[$p]=&input("Short name, name of the spool directory",$short[$p]);
      $dev[$p]  =&input("Full device path (or remote machine name)",
			$dev[$p]);

      if ($#filters == 0) {
        print "There aren't any filters."; $full[$p]='done';
      } else {
	print<<EOT;

The following filters are available in /etc/magicfilter.

You can read the comments at the top of each file to help decide which
filter would best suit your needs.

The filters concentrate on the printer language. If you know, that your
printer uses a given printer language (e.g. ESC/P2 or PCL5) and your
printer is not listed below, you can use another filter which uses same
language.

Read the file `devices.txt.gz' from the GhostScript package and have your
printer manual handy if you want to change a filter.

EOT
	$l=0;
	foreach $filter (@filters) {
	  $l += (length($filter)+1);
	  if ($l > 72-length($filter)) { print "\n"; $l=0; }
	  print "$filter ";
	}
        print "\n\n";

        $ifilter[$p]=&input("The input filter to be used", $ifilter[$p]);

        if ($dev[$p] !~ /\/dev\//) { 
	  $remflags[$p]=":rm=$dev[$p]:rp=$short[$p]:lpr_bounce"; $dev[$p]="";
	} elsif ($dev[$p] =~ /\/dev\/ttyS/) { 
	  $serflags[$p]=":bf=2400:fc=0:fs=1";
	}

        $spooldir[$p]="/var/spool/lpd/$short[$p]";

        print "\n";
      }
    }
  }
  while ($full[$p] !~ /done\s*/);

  if ($p > 0) {
    if ($p == 1) { $d=0; }
    do {
      format top=

                       Printer configuration

Default printer (alias \`lp\') is marked with an asterisk.

Printer name  Short name Spool dir            Device     Input filter
-------------------------------------------------------------------------------
.

    format STDOUT=
@<<<<<<<<<<<< @<<<<<<<<< @<<<<<<<<<<<<<<<<<<< @<<<<<<<<< @<<<<<<<<<<<<<<<<<<@<<
$full,        $short,    $spooldir,           $dev,      $ifilter,          $a
.

      for($i=0;$i<$p;$i++) {
        $full=$full[$i]; $short=$short[$i];
        $spooldir=$spooldir[$i]; $dev=$dev[$i]; $ifilter=$ifilter[$i];
	$a= ($remflags[$i] ne "") ? "R" : "";
        $a= $a . (($i == $d) ? "*" : "");

        write;
      }
      $ans="n"; $-=0;

      print "\n";
      if ($p > 1) {
        $ans=&yninput("Do you want to change the default printer","n");
        if ($ans =~ /y(es)?/) {
          $def=&input("New default printer (type its short name)","");
          $d=0;
          while (($d < $p) && ($short[$d] !~ /$def/)) { $d++; }
          if ($d == $p) { $d = 0; }
	  $short[$d]=$def;
        }
      }
    }
    while ($ans =~ /y(es)?/);
    $ok=&yninput("Is this ok","y");
  } else {
    $ok="yes";
  } 
}

print "\n";
if ($p > 0) {
  if ( -x "/usr/bin/paperconf" ) {
    open(PAPERSIZE, "/usr/bin/paperconf -N|");
    $papersize=<PAPERSIZE>; chop($papersize);
    close(PAPERSIZE);
  }

  $pagelength=66;
  if ($papersize =~ /A4/) { $pagelength=72; }
  print "Paper size is $papersize, page length is $pagelength lines.\n";

  # Stop running daemons:
  if ($> == 0) {
    if ( -x "/etc/init.d/lpd" )   { system("/etc/init.d/lpd stop");  }
    if ( -x "/etc/init.d/lprng" ) { system("/etc/init.d/lprng stop"); }
  }

  open(PRINTCAP,">$printcap") || die "Can't write $printcap: $!";
  print PRINTCAP <<EOH;
#
# Copyright (c) 1983 Regents of the University of California.
# All rights reserved.
#
# Redistribution and use in source and binary forms are permitted
# provided that this notice is preserved and that due credit is given
# to the University of California at Berkeley. The name of the University
# may not be used to endorse or promote products derived from this
# software without specific prior written permission. This software
# is provided ``as is'' without express or implied warranty.
#
#	@(#)etc.printcap	5.2 (Berkeley) 5/5/88
#
# This file was generated by $0.
#
EOH

    $short[$d]="lp|" . $short[$d];
  for($i=0;$i<$p;$i++) {
    print PRINTCAP <<"EOE";
$short[$i]|$full[$i]:\\
\t:lp=$dev[$i]:sd=$spooldir[$i]$remflags[$i]$serflags[$i]:\\
\t:sh:pw\#80:pl\#${pagelength}:px\#1440:mx\#0:\\
\t:if=$filterdir/$ifilter[$i]-filter:\\
\t:af=/var/log/lp-acct:lf=/var/log/lp-errs:
EOE
  }
  close(PRINTCAP);

  for($i=0;$i<$p;$i++) {
    $lpgrp=(getpwnam("lp"))[2];
    if ( ! -e $spooldir[$i] ) {
        umask 002; mkdir($spooldir[$i],02775); chown(0,$lpgrp,$spooldir[$i]);
    }
  }

  print<<EOT;
$printcap generated.

You\'ll probably want to finetune your newly created $printcap file.
Read the printcap(5), lpr(1), lpq(1), lprm(1) and lpc(1) manual pages
and the PRINTING-HOWTO before doing this.

EOT
    if (grep(/Stylus/, @ifilter)) {
      print<<EOT;
The file README-StylusColor explains the fine points about the Epson
Stylii Color family of printers.

EOT
    }
    if ($> == 0) {
      if ( -x "/etc/init.d/lpd"   ) { system("/etc/init.d/lpd start"); }
      if ( -x "/etc/init.d/lprng" ) { system("/etc/init.d/lprng start"); }
    }
} else {
  print<<EOT;

Nothing to install.
You\'re going to write your $printcap file yourself.

EOT
}

my $display=$ENV{"DISPLAY"} || "";

if ( $display ne "" ) {
  $dummy="";
  print "Press <ENTER> to continue."; $dummy=<STDIN>;
}

exit 0;