#!/usr/bin/perl -w

# This program checks the whole Wine environment configuration.
# (or that's at least what it's supposed to do once it's finished)
# (C) 2001 Andreas Mohr
# Redistributable under Wine License
#
# FIXME:
# - implement cmdline arguments e.g. for confirmation keypress
#   in case of a problem
#
# TODO:
# - implement it in a much more systematic way. This is a quick hack for now
#   (like every Perl program ;-)
#   And much more so since I'm NOT a Perl hacker
# - test/tweak on non-Linux systems
#

use Getopt::Long;
use strict;

my $hold = 0;

my $count_tests = 0;
my $count_ok = 0;
my $count_suspect = 0;
my $count_bad = 0;
my $count_critical = 0;
my $count_failed = 0;

my $is_notchecked = 0;
my $is_ok = 1;
my $is_suspect = 2;
my $is_bad = 3;
my $is_critical = 4;
my $is_failed = 5;

my $factor_suspect = 0.995;
my $factor_bad = 0.95;
my $factor_critical = 0.85;
my $factor_failed = 0.15;

my $correctness = 100.0;

my $indent = 0;

my ($level, $reason, $advice);

my $advice_chmod = "Use chmod as root to fix it (\"man chmod\")";
my $advice_fs = "The Filesystem option indicates the filesystem behaviour Wine is supposed to *emulate*, not the filesystem which is there";

my $dev_read = 1;
my $dev_write = 2;
my $dev_open = 4;

select(STDERR); $| = 1;     # make unbuffered
select(STDOUT); $| = 1;     # make unbuffered

#--------------------------------- main program --------------------------------
&Introduction();
&Check_BaseFiles();
&Check_ConfigFile();
&Check_Devices();
&Check_Registry();
&Check_WindowsFiles();
&Print_Score();

#------------------------------- support functions -----------------------------
sub Do_PrintHeader {
  my ($str) = @_;
  my $len = length($str);
  my $num = int((80 - $len - 2)/2);
  my $i;

  print "\n";
  for ($i = 0; $i < $num; $i++) {
    print "-";
  }
  print " ".$str." ";
  for ($i = 0; $i < $num; $i++) {
    print "-";
  }
  if ($len % 2)
  {
    print "-";
  }
  print "\n";
}

sub Do_Check {
  my ($text) = @_;
  my $test_no;
  my $indent_str = "";
  
  $count_tests++;
  $test_no = sprintf("%03d", $count_tests);
  for (my $i = 0; $i < $indent; $i++)
  {
    $indent_str = $indent_str." ";
  }
  print sprintf("%.60s", $test_no.".".$indent_str." Checking ".$text."...                                           ");
}

sub Do_PrintResult {
  my($level, $str, $advice, $skip_score) = @_;
  my $err;
  my $key;

  if ($level == $is_notchecked)
  {
    $err = "NOT CHECKED";
    $str = "";
    $advice = "";
  }
  elsif ($level == $is_ok)
  {
    $err = "OK";
    $str = "";
    $advice = "";
    $count_ok++;
  }
  elsif ($level == $is_suspect)
  {
    $err = "SUSPICIOUS";
    $count_suspect++;
    if (! $skip_score)
    {
      $correctness *= $factor_suspect;
    }
  }
  elsif ($level == $is_bad)
  {
    $err = "BAD";
    $count_bad++;
    if (! $skip_score)
    {
      $correctness *= $factor_bad;
    }
  }
  elsif ($level == $is_critical)
  {
    $err = "CRITICAL";
    $count_critical++;
    if (! $skip_score)
    {
      $correctness *= $factor_critical;
    }
  }
  elsif ($level == $is_failed)
  {
    $err = "FAILED";
    $count_failed++;
    if (! $skip_score)
    {
      $correctness *= $factor_failed;
    }
  }
  print $err;
  if ($str)
  {
    print " (".$str.")";
  }
  print ".";
  if ($hold)
  {
    print " Press Enter.";
    $key = getc(STDIN);
  }
  else
  {
    print "\n";
  }
  if ($advice)
  {
    print "- ADVICE: ".$advice.".\n";
  }
}

#-------------------------------- main functions ------------------------------
sub Introduction {
  print "This script verifies the configuration of the whole Wine environment.\n";
  print "Note that this is an ALPHA version, and thus it doesn't catch all problems !\n";
  print "The results of the checks are printed on the right side:\n";
  print "OK         - test passed without problems.\n";
  print "SUSPICIOUS - potentially problematic. You might want to look into that.\n";
  print "BAD        - This is a problem, and it leads to configuration score penalty.\n";
  print "CRITICAL   - A critical problem which can easily lead to malfunction.\n";
  print "FAILED     - This problem leads to Wine failure almost certainly.\n";
  print "\nThe result will be printed as a percentage score indicating config completeness.\n";
  print "\n";
  if ($hold)
  {
    my $key;
    print "Press Enter to continue or Ctrl-C to exit.";
    $key = getc(STDIN);
  }
}

sub Check_BaseFiles {
  my $line;

  Do_PrintHeader("checking Wine base files");

  $level = $is_ok;
  Do_Check("for file \"wine\"");
  $line = `which wine`;
  if (!$line)
  {
    $level = $is_failed;
    $reason = "file not found";
    $advice = "Make sure the \"wine\" command is in your PATH (echo \$PATH; export PATH=xxx)";
  }
  Do_PrintResult($level, $reason, $advice);
  
  # check for config mess
  $level = $is_ok;
  my @output = ();
  Do_Check("for correct .so lib config (please wait)");
  push (@output, `find / -name libwine.so 2>/dev/null`);
  if (@output > 1)
  {
    $level = $is_suspect;
    my $dirs = "";
    foreach $line (@output) {
      chomp $line;
      $dirs = $dirs." ".$line;
    }
    $reason = "libwine.so found ".@output." times:".$dirs;
    $advice = "check whether this is really ok";
  }
  Do_PrintResult($level, $reason, $advice);
}

sub Do_Config_Drive {
  my ($drive, $entries, $values) = @_;
  my $index = 0;
  my $arg;
  my $path = "";
  my $type = "";
  my $label = "";
  my $serial = "";
  my $device = "";
  my $fs = "";
  my $unknown = "";
  my $level;
  my $my_advice_fat = "If that doesn't help, change mount options in case of VFAT (\"umask\" option)";

  print "\n>>> Checking drive ".$drive." settings:\n";
  $reason = "";
  while (@$entries[$index])
  {
    $arg = @$values[$index];
    SWITCH: for (@$entries[$index]) {
	/^path$/i	&& do { $path = $arg; last; };
	/^type$/i && do { $type = $arg; last; };
	/^label$/i && do { $label = $arg; last; };
	/^serial$/i && do { $serial = $arg; last; };
	/^device$/i && do { $device = $arg; last; };
	/^filesystem$/i && do { $fs = $arg; last; };
	$unknown = @$entries[$index];
    }
    $index++;
  }

  $indent++;

  my $serious = ($drive =~ /^C$/i) || ($type =~ /^cdrom$/i);
  
  ##### check Path #####
  Do_Check("Path option");
  $level = $is_ok;
  $advice = "The syntax of the Path option has to be something like /my/mount/point";
  if (! $path)
  {
    $level = $serious ? $is_failed : $is_bad;
    $reason = "no Path option given in config file";
  }
  elsif ($path =~ /\\/)
  {
    $level = $serious ? $is_failed : $is_bad;
    $reason = "wrong Path format ".$path;
  }
  elsif ($path =~ /\$\{(.*)\}$/)
  {
    # get path assigned to environment variable
    my $envpath = $ENV{$1};
    if (! $envpath)
    {
      $level = $serious ? $is_failed : $is_critical;
      $reason = "Path \"".$path."\" references environment variable \"".$1."\" which is undefined";
      $advice = "set environment variable before starting Wine or give a \"real\" directory instead";
    }
    else
    {
      $path = $envpath;
      goto PERMCHECK; # hmpf
    }
  }
  else
  {
PERMCHECK:
    if (!-e $path)
    {
      $level = $serious ? $is_failed : $is_suspect;
      $reason = $path." does not exist !";
      $advice = "create this directory or point Path to a real directory";
    }
    elsif (!-r $path)
    {
      $level = $serious ? $is_failed : $is_bad;
      $reason = $path." is not readable for you";
      $advice = $advice_chmod.". ".$my_advice_fat;
    }
    elsif ((! ($type =~ /^cdrom$/i)) && (!-w $path))
    {
      $level = ($drive =~ /^C$/i) ? $is_failed : $is_suspect;
      $reason = $path." is not writable for you";
      $advice = $advice_chmod.". ".$my_advice_fat;
    }
    else # check permissions of the drive's directories
    {
        my(@output) = ();
        push (@output, `find $path 2>&1 1>/dev/null`);
	foreach my $line (@output) {
	    if ($line =~ /find:\ (.*):\ Permission denied$/)
	    {
	        $level = ($drive =~ /^C$/i) ? $is_critical : $is_suspect;
		$reason = "directory $1 is not accessible for you";
		$advice = $advice_chmod.". ".$my_advice_fat;
		last;
	    }
	}
    }
  }
  Do_PrintResult($level, $reason, $advice);

  ##### check Type #####
  if ($type)
  {
    Do_Check("Type option");
    $level = $is_ok;
    SWITCH: for ($type) {
        /^floppy$/i && do { last; };
        /^hd$/i && do { last; };
        /^network$/i && do { last; };
        /^cdrom$/i && do {
                        if (! $device)
		        {
			  $level = $is_critical;
		          $reason = "no Device option found -> CD-ROM labels can''t be read";
			  $advice = "add Device option and make sure the device given is accessible by you";
		        }
                        last;
		         };
        /^ramdisk$/i && do { last; };
        if ($type)
        {
          $level = $is_bad;
          $reason = "invalid Type setting ".$type;
          $advice = "use one of \"floppy\", \"hd\", \"network\" or \"cdrom\"";
        }
    }
    Do_PrintResult($level, $reason, $advice);
  }

  ##### FIXME: check Label and Serial here #####

  ##### check Device #####
  if ($device)
  {
    my $mode = ($type =~ /^cdrom$/i) ? $dev_read : $dev_read|$dev_write;
    &Do_CheckDevice("device", $device, 1, $mode);
  }

  ##### check Filesystem #####
  if ($fs)
  {
    Do_Check("Filesystem option");
    $level = $is_ok;
    SWITCH: for ($fs) {
        /^(dos|fat|msdos|unix)$/i && do {
                         $level = $is_bad;
	                 $reason = "You probably don't want to use \"".$fs."\". ".$advice_fs;
			 if ($fs =~ /^unix$/i)
			 {
			   $advice = "This should almost never be used";
			 }
			 else
			 {
			   $advice = "only use ".$fs." if you only have a crappy 8.3 filename (i.e.: non-LFN) DOS FAT kernel filesystem driver";
			 }
	                 last;
			   };
        /^vfat$/i && do { last; };
        /^win95$/i && do { last; };
        if ($fs)
        {
          $level = $is_bad;
          $reason = "invalid Filesystem setting ".$type;
          $advice = "use one of \"win95\", \"msdos\" or \"unix\"";
        }
    }
    Do_PrintResult($level, $reason, $advice);
  }
  $indent--;
  if ($reason) {
    print "--> PROBLEM.\n";
  }
  else
  {
    print "--> OK.\n";
  }
}

sub Do_Config_Main {
  my ($file) = shift;
  my ($config, $line);
  my $section = "";
  my (@entries, @values);
  LINE: while (<$file>)
  {
    $line = $_;
    next LINE if ($line =~ /[\ ]*[;#]/);	# skip comments
    chomp $line;
    #print "line: ".$line."\n";
    if ($line =~ /\[(.*)\]/) # end of section/next section ?
    {
      my $nextsection = $1;
      my $found = 1;
      SWITCH: for ($section) {
	/Drive\ (.)/i	&& do { &Do_Config_Drive($1, \@entries, \@values); last; };
	if ($section)
	{
	  $found = 0;
	}
      }
      $section = $found ? $nextsection : "";
      @entries = (); @values = ();
      next LINE;
    }
    if ($line =~ /^[\ \t]*\"(.*)\"[\ \t]*\=[\ \t]*\"(.*)\"/)
    {
      push(@entries, $1);
      push(@values, $2);
    }
  }
}

sub Check_ConfigFile {
  my $config = "$ENV{'HOME'}/.wine/config";
  my $indrive = 0;

  Do_PrintHeader("checking config file");

  Do_Check("config file access");
  open(CFGFILE, $config);
  if (! <CFGFILE>)
  {
    if (!-e $config) {
      $reason = $config." does not exist";
      $advice = "it is ok in case you have ~/.winerc. If you don''t, then you''re in trouble !";
    }
    elsif (!-r $config) {
      $reason = $config." not readable";
      $advice = $advice_chmod;
    }
    Do_PrintResult($is_failed, $reason, $advice);
    return;
  }
  if (!-w $config)
  {
    Do_PrintResult($is_failed, $config." not writable", "wineserver needs to be able to write to config file. ".$advice_chmod);
  }
  else
  {
    Do_PrintResult($is_ok);
  }
  Do_Config_Main(\*CFGFILE);
  close(CFGFILE);
}

sub Do_CheckDevice {
  my($descr, $dev, $output, $mode) = @_;
  my $level = $is_ok;
  my $errstr = "";

  if (! $mode)
  {
    $mode = $dev_read|$dev_write|$dev_open;
  }
  ($output != -1) && Do_Check($descr." ".$dev);

  my $err_level = ($output == 1) ? $is_critical : $is_bad;

  if (!-e $dev)
  {
    $level = $err_level;
    $reason = $dev." does not exist";
    $advice = "use MAKEDEV script to create it";
    goto FAILED;
  }
  if (($mode & $dev_read) && (!-r $dev))
  {
    $level = $err_level;
    $reason = $dev." is not readable for you";
    $advice = $advice_chmod;
    goto FAILED;
  }
  if (($mode & $dev_write) && (!-w $dev))
  {
    $level = $err_level;
    $reason = $dev." is not writable for you";
    $advice = $advice_chmod;
    goto FAILED;
  }
  if (($mode & $dev_open) && (!open(DEVICE, ">$dev")))
  {
    $level = $err_level;
    $reason = "no kernel driver for ".$dev."?";
    $advice = "module loading problems ? Read /usr/src/linux/Documentation/modules.txt";
    goto FAILED;
  }

FAILED:
  close(DEVICE);
  ($output != -1) && Do_PrintResult($level, $reason, $advice);
}

sub Check_Devices {
# FIXME: check joystick and scsi devices !
  my $dev_sound = "/dev/dsp";
  my $dev_mixer = "/dev/mixer";
  my $dev_sequencer = "/dev/sequencer";
  my $dev_mem = "/dev/mem";

  Do_PrintHeader("checking system devices used by Wine");
  &Do_CheckDevice("sound device", $dev_sound, 1);
  &Do_CheckDevice("audio mixer device", $dev_mixer, 1);
  &Do_CheckDevice("MIDI sequencer device", $dev_sequencer, 0);
  &Do_CheckDevice("device needed for DGA (option \"UseDGA\"):", $dev_mem, 0);
}

sub Check_Registry {
  my(@entries) = ();
  my $regfile = $ENV{'HOME'}."/.wine/system.reg";

  Do_PrintHeader("checking registry configuration");

  Do_Check("availability of winedefault.reg entries");
  push (@entries, `grep "SHAREDMEMLOCATION" $regfile`);
  if (@entries)
  {
    Do_PrintResult($is_ok);
  }
  else
  {
    Do_PrintResult($is_critical, "entry \"SHAREDMEMLOCATION\" not found", "file winedefault.reg doesn't seem to have been applied using regapi");
  }
  @entries = ();

  Do_Check("availability of windows registry entries");
# FIXME: use a different key for check if Wine adds this one to its
#        default registry.
  push (@entries, `grep "Default Taskbar" $regfile`);
  if (@entries)
  {
    Do_PrintResult($is_ok);
  }
  else
  {
    Do_PrintResult($is_critical, "entry \"Default Taskbar\" not found", "Windows registry does not seem to be added to Wine. This can affect many newer programs");
  }
  @entries = ();
}

sub Check_WindowsFiles {
}

sub Print_Score {
#  my ($score_total, $score_reached, $score_percent);

#  $score_total   =	$count_tests * 20;
#  $score_reached =	$count_ok * 20 +
#  			$count_bad * 15 +
#			$count_critical * 5 +
#			$count_failed * 0;
#  $score_percent =	$score_reached * 100 / $score_total;

  print "\n";
  print $count_tests." tests. ".$count_suspect." suspicious, ".$count_bad." bad, ".$count_critical." critical, ".$count_failed." failed.\n";
  print sprintf "Wine configuration correctness score: %2.2f%%\n", $correctness;
}