#!/usr/bin/perl
#  
#  Copyright (c) 2002 Steve Slaven, All Rights Reserved.
#  
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of
#  the License, or (at your option) any later version.
#  
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#  GNU General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
#  MA 02111-1307 USA
#  

# Used to replace lpr on systems where the printers may change
# a lot (e.g. a laptop) and there are several irritating apps
# (e.g. mozilla) that don't let you choose an alternate printer
#
# Rename /usr/bin/lpr to /usr/bin/lpr.real and put this in
# /usr/bin/lpr

# Prompt if no printer specified
@opts = @ARGV; # This is to copy the args we'll be using in the open() call

# Try and read printcap, to get a list of printers
%printers = ();
open( IN, "/etc/printcap" );
while( $line = <IN> ) {
	$line =~ s/#.*//;
	if( $line =~ /^[a-zA-Z]/ ) {
		# Assume it's set up like
		# name|Real name:
		( $pn ) = $line =~ /^([^ ].*?):/;

		next unless $pn;

		@names = split( /\|/, $pn );
		$realname = pop( @names );

		for( @names ) {
			$printers{ $_ } = $realname;
		}
	}
}
close( IN );

# Find default
( $printer ) = grep { /^-P/ } @opts;
$printer =~ s/^-P//;
@opts = grep { $_ !~ /^-P/ } @opts;
$printer = $printer || 'lp';

# Make a hoopy-doopy dialog
@cmd = ( '--radiolist',
	'Select Printer',
	'400',
	'600',
	'10' );

for( keys( %printers ) ) {
	push( @cmd,
		$_,
		$printers{ $_ },
		$_ eq $printer ? 'on' : 'off' );
}

push( @cmd,
	'CANCEL',
	'Do not print',
	'off' );

# Generate cmdline
$cmdline = join( " ", map { s/(["'\\;])/\\$1/g; '"' . $_ . '"' } @cmd );

$ans = '';
while( ! $ans ) {
	$ans = `gdialog $cmdline 2>&1`;
}

chomp( $ans );
if( $ans eq "CANCEL" ) {
	system( "gdialog --infobox 'Print job canceled' 300 500" );
	exit;
}

unshift( @opts, "-P$ans" );

$opts = join( " ", map { s/(["'\\;])/\\$1/g; '"' . $_ . '"' } @opts );

# Handle sigchld, e.g. if lpr.real dies we should too
$SIG{ CHLD } = sub { exit(); };

open( OUT, "|/usr/bin/lpr.real $opts" );
print OUT $_ while <STDIN>;
close( OUT );