ext/DB_File/dbinfo

   1 #!/usr/local/bin/perl
   2
   3 # Name:         dbinfo -- identify berkeley DB version used to create
   4 #                         a database file
   5 #
   6 # Author:       Paul Marquess  <Paul.Marquess@btinternet.com>
   7 # Version:      1.03
   8 # Date          17th September 2000
   9 #
  10 #     Copyright (c) 1998-2000 Paul Marquess. All rights reserved.
  11 #     This program is free software; you can redistribute it and/or
  12 #     modify it under the same terms as Perl itself.
  13
  14 # Todo: Print more stats on a db file, e.g. no of records
  15 #       add log/txn/lock files
  16
  17 use strict ;
  18
  19 my %Data =
  20         (
  21         0x053162 =>     {
  22                           Type     => "Btree",
  23                           Versions =>
  24                                 {
  25                                   1     => "Unknown (older than 1.71)",
  26                                   2     => "Unknown (older than 1.71)",
  27                                   3     => "1.71 -> 1.85, 1.86",
  28                                   4     => "Unknown",
  29                                   5     => "2.0.0 -> 2.3.0",
  30                                   6     => "2.3.1 -> 2.7.7",
  31                                   7     => "3.0.x",
  32                                   8     => "3.1.x or greater",
  33                                 }
  34                         },
  35         0x061561 =>     {
  36                           Type     => "Hash",
  37                           Versions =>
  38                                 {
  39                                   1     => "Unknown (older than 1.71)",
  40                                   2     => "1.71 -> 1.85",
  41                                   3     => "1.86",
  42                                   4     => "2.0.0 -> 2.1.0",
  43                                   5     => "2.2.6 -> 2.7.7",
  44                                   6     => "3.0.x",
  45                                   7     => "3.1.x or greater",
  46                                 }
  47                         },
  48         0x042253 =>     {
  49                           Type     => "Queue",
  50                           Versions =>
  51                                 {
  52                                   1     => "3.0.0 or greater",
  53                                 }
  54                         },
  55         ) ;
  56
  57 die "Usage: dbinfo file\n" unless @ARGV == 1 ;
  58
  59 print "testing file $ARGV[0]...\n\n" ;
  60 open (F, "<$ARGV[0]") or die "Cannot open file $ARGV[0]: $!\n" ;
  61
  62 my $buff ;
  63 read F, $buff, 20 ;
  64
  65 my (@info) = unpack("NNNNN", $buff) ;
  66 my (@info1) = unpack("VVVVV", $buff) ;
  67 my ($magic, $version, $endian) ;
  68
  69 if ($Data{$info[0]}) # first try DB 1.x format
  70 {
  71     $magic = $info[0] ;
  72     $version = $info[1] ;
  73     $endian  = "Unknown" ;
  74 }
  75 elsif ($Data{$info[3]}) # next DB 2.x big endian
  76 {
  77     $magic = $info[3] ;
  78     $version = $info[4] ;
  79     $endian  = "Big Endian" ;
  80 }
  81 elsif ($Data{$info1[3]}) # next DB 2.x little endian
  82 {
  83     $magic = $info1[3] ;
  84     $version = $info1[4] ;
  85     $endian  = "Little Endian" ;
  86 }
  87 else
  88   { die "not a Berkeley DB database file.\n" }
  89
  90 my $type = $Data{$magic} ;
  91 my $magic = sprintf "%06X", $magic ;
  92
  93 my $ver_string = "Unknown" ;
  94 $ver_string = $type->{Versions}{$version}
  95         if defined $type->{Versions}{$version} ;
  96
  97 print <<EOM ;
  98 File Type:              Berkeley DB $type->{Type} file.
  99 File Version ID:        $version
 100 Built with Berkeley DB: $ver_string
 101 Byte Order:             $endian
 102 Magic:                  $magic
 103 EOM
 104
 105 close F ;
 106
 107 exit ;