keytab-lilo.pl

   1 #!/usr/bin/perl
   2 # --------------------------------------------------------------------------
   3 # This program was taken from the LILO-20 distribution; only this header
   4 # was added.
   5 #
   6 # LILO program code, documentation and auxiliary programs are
   7 # Copyright 1992-1997 Werner Almesberger.
   8 # All rights reserved.
   9 #
  10 # Redistribution and use in source and binary forms of parts of or the
  11 # whole original or derived work are permitted provided that the
  12 # original work is properly attributed to the author. The name of the
  13 # author may not be used to endorse or promote products derived from
  14 # this software without specific prior written permission. This work
  15 # is provided "as is" and without any express or implied warranties.
  16 # --------------------------------------------------------------------------
  17
  18 eval { use bytes; }; eval { binmode STDOUT; };
  19
  20 $DEFAULT_PATH = "/usr/lib/kbd/keytables";
  21 $DEFAULT_MAP = "us";
  22 $DEFAULT_EXT = ".map";
  23
  24 sub usage
  25 {
  26     print STDERR
  27       "usage: $0 [ -p old_code=new_code ] ...\n".
  28       (" "x(8+length $0))."[path]default_layout[.map] ] ".
  29       "[path]kbd_layout[.map]\n";
  30     exit 1;
  31 }
  32
  33
  34 while ($ARGV[0] eq "-p") {
  35     shift(@ARGV);
  36     &usage unless $ARGV[0] =~ /=/;
  37     $table[eval($`)] = eval($');
  38     shift(@ARGV);
  39 }
  40 &usage unless defined $ARGV[0];
  41 load_map("def",defined $ARGV[1] ? $ARGV[0] : undef);
  42 load_map("kbd",defined $ARGV[1] ? $ARGV[1] : $ARGV[0]);
  43 &build_table("plain","shift","ctrl","altgr","shift_ctrl",
  44   "altgr_ctrl","alt","shift_alt","ctrl_alt");
  45 for ($i = 0; $i < 256; $i++) {
  46     printf("%c",$table[$i] ? $table[$i] : $i) || die "print: $!";
  47 }
  48 close STDOUT || die "close: $!";
  49
  50
  51 sub load_map
  52 {
  53     local ($pfx,$map) = @_;
  54     local ($empty,$current);
  55
  56     $map = $DEFAULT_MAP unless defined $map;
  57     $map = $DEFAULT_PATH."/".$map unless $map =~ m|/|;
  58     $map .= $DEFAULT_EXT unless $map =~ m|/[^/]+\.[^/]+$|;
  59     if (!open(FILE,"loadkeys -m $map |")) {
  60         print STDERR "loadkeys -m $map: $!\n";
  61         exit 1;
  62     }
  63     undef $current;
  64     $empty = 1;
  65     while (<FILE>) {
  66         chop;
  67         if (/^u_short\s+(\S+)_map\[\S+\]\s+=\s+{\s*$/) {
  68             die "active at beginning of map" if defined $current;
  69             $current = $pfx.":".$1;
  70             next;
  71         }
  72         undef $current if /^};\s*$/;
  73         next unless defined $current;
  74         s/\s//g;
  75         $map{$current} .= $_;
  76         $empty = 0;
  77     }
  78     close FILE;
  79     return unless $empty;
  80     print STDERR "Keymap is empty\n";
  81     exit 1;
  82 }
  83
  84
  85 sub build_table
  86 {
  87     local (@maps) = @_;
  88     local (@tmp);
  89
  90     $set = 0;
  91     for $map (@maps) {
  92         $code = $set;
  93         for (split(",",$map{"def:".$map})) {
  94             die "bad map entry $_ (def, map $map)" unless /^0x\S\S(\S\S)$/;
  95             $tmp[$code] = hex $1 unless $tmp[$code];
  96             $code++;
  97         }
  98         $set += 256;
  99     }
 100     $set = 0;
 101     for $map (@maps) {
 102         $code = $set;
 103         for (split(",",$map{"kbd:".$map})) {
 104             die "bad map entry $_ (kbd, map $map)" unless /^0x\S\S(\S\S)$/;
 105             $table[$tmp[$code]] = hex $1 unless $table[$tmp[$code]];
 106             $code++;
 107         }
 108         $set += 256;
 109     }
 110     $table[0] = 0;
 111 }