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#!/usr/bin/perl
# -*- Mode: cperl -*-
# Copyright (C) 2002 by Chmouel Boudjnah <chmouel@mandrakesoft.com>
# Redistribution of this file is permitted under the terms of the GNU
# Public License (GPL)
#
# Detect vga resolution we want.
#
# add better detection thanks to Olivier Blin idea to use argument from
# make_boot_splash.
use strict;
my (%main, %entry, $vga, $initrd);
if ($ARGV[0]) {
$initrd = $ARGV[0];
$initrd =~ s,.*/,,
} else {
$vga = detect_from_cmdline(cat_('/proc/cmdline'));
undef $vga if $vga =~ /x/; #lilo cmdline can't convert
}
detect_from_loader() if !$vga;
if ($vga) {
chomp $vga;
$vga =~ s/vga=//;
$vga = convert_vgamode();
}
print $vga, "\n" if $vga;
sub detect_from_cmdline {return (grep /vga=\d+/, split("[ \t]", shift))[0];}
sub detect_from_loader {
my $loader = `detectloader -q`;chomp $loader;
if ($loader =~ m/lilo/i ) {
parse_lilo_conf();
} elsif ($loader =~ /grub/i ) {
parse_grub_conf();
}
if ($initrd) {
$vga = $main{initrd}{$initrd}
}
$vga ||= $entry{$main{default}}{vga};
$vga ||= $main{vga}
}
sub parse_grub_conf {
my ($title);
my $cnt = 0;
my $grub_conf = "/boot/grub/menu.lst";
my $vga;
return if not -f $grub_conf;
open F, $grub_conf or die "Can't open $grub_conf\n";
while (<F>) {
next if /^\s*#/;
$main{default} = $1 if /^default (\d+)/;
if (/^title\s+(.*)/) {
$vga=0;
$title=$1;
$entry{$title}{cnt} = $cnt;
$main{default} = $title if $entry{$title}{cnt} eq $main{default};
$cnt++;
}
if (m/kernel\s+\(.*\)[^\s]+/) {
$vga = $1 if /vga=(\w*)/;
$entry{$title}{vga} = $vga if ($title and $vga);
}
if (m,initrd\s+\(.*\)(?:.*/)?([^\s]+),){
$entry{$title}{initrd} = $1;
$main{initrd}{$1} = $entry{$title}{vga}
}
}
close F;
}
sub parse_lilo_conf {
my $lilo_conf="/etc/lilo.conf";
my ($vga, $label, $loc_initrd);
return if not -f $lilo_conf;
open F, $lilo_conf or die "Can't open $lilo_conf\n";
while (<F>) {
next if /^\s*#/;
$main{default} = $1 if m/^default=(.*)/;
$main{vga} = $1 if m/^vga=(.*)/;
$vga = $1 if /vga=(.*)/;
$label = $1 if /label=(.*)/;
$loc_initrd = $1 if m,initrd=(?:.*/)?(.*),;
$entry{$label}{vga} = $vga if ($label && $vga);
if (/image/) {
if ($loc_initrd && $label && $vga) {
$entry{$label}{initrd} = $loc_initrd;
if (!$main{initrd}{$loc_initrd} || $main{default} eq $label) {
$main{initrd}{$loc_initrd} = $vga
}
}
undef $vga,$label;
}
}
if ($loc_initrd && $label && $vga) {
$entry{$label}{initrd} = $loc_initrd;
if (!$main{initrd}{$loc_initrd} || $main{default} eq $label) {
$main{initrd}{$loc_initrd} = $vga
}
}
close F;
}
sub convert_vgamode {
my $v;
#From drakx Xconfigurator_consts.pm
my %vgamodes = (
'640xx8' => [ '769', '0x301' ],
'640x480x8' => [ '769', '0x301' ],
'800xx8' => [ '771', '0x303' ],
'800x600x8' => [ '771', '0x303' ],
'1024xx8' => [ '773', '0x305' ],
'1024x768x8' => [ '773', '0x305' ],
'1280xx8' => [ '775', '0x307' ],
'1280x1024x8' => [ '775', '0x307' ],
'1600xx8' => [ '777', '0x309' ],
'1600x1200x8' => [ '777', '0x309' ],
'640xx15' => [ '784', '0x310' ],
'640x480x15' => [ '784', '0x310' ],
'800xx15' => [ '787', '0x313' ],
'800x600x15' => [ '787', '0x313' ],
'1024xx15' => [ '790', '0x316' ],
'1024x768x15' => [ '790', '0x316' ],
'1280xx15' => [ '793', '0x319' ],
'1280x1024x15' => [ '793', '0x319' ],
'1600xx15' => [ '796', '0x31C' ],
'1600x1200x15' => [ '796', '0x31C' ],
'640xx16' => [ '785', '0x311' ],
'640x480x16' => [ '785', '0x311' ],
'800xx16' => [ '788', '0x314' ],
'800x600x16' => [ '788', '0x314' ],
'1024xx16' => [ '791', '0x317' ],
'1024x768x16' => [ '791', '0x317' ],
'1280xx16' => [ '794', '0x31A' ],
'1280x1024x16' => [ '794', '0x31A' ],
'1600xx16' => [ '797', '0x31D' ],
'1600x1200x16' => [ '797', '0x31D' ],
#- '640xx24' => 786, #- there is a problem with these resolutions since the BIOS may take 24 or 32 planes.
#- '640x480x24' => 786,
#- '800xx24' => 789,
#- '800x600x24' => 789,
#- '1024xx24' => 792,
#- '1024x768x24' => 792,
#- '1280xx24' => 795,
#- '1280x1024x24' => 795,
);
foreach my $k (keys %vgamodes) { $v = $k if grep { $_ eq $vga } @{$vgamodes{$k}} }
undef $vga if not $v;return $v;
}
sub cat_ { local *F; open F, $_[0] or $_[1] ? die "cat of file $_[0] failed: $!\n" : return; my @l = <F>; wantarray ? @l : join '', @l }
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