#!/usr/local/bin/perl

# Name:		dbinfo -- identify berkeley DB version used to create 
#			  a database file
#
# Author:	Paul Marquess  <Paul.Marquess@btinternet.com>
# Version: 	1.05 
# Date		1sh November 2003
#
#     Copyright (c) 1998-2003 Paul Marquess. All rights reserved.
#     This program is free software; you can redistribute it and/or
#     modify it under the same terms as Perl itself.

# Todo: Print more stats on a db file, e.g. no of records
#       add log/txn/lock files

 

my %Data =
	%(
	0x053162 =>	\%(
			  Type 	   => "Btree",
			  Versions => 
				\%(
				  1	=> \@(0, "Unknown (older than 1.71)"),
				  2	=> \@(0, "Unknown (older than 1.71)"),
				  3	=> \@(0, "1.71 -> 1.85, 1.86"),
				  4	=> \@(0, "Unknown"),
				  5	=> \@(0, "2.0.0 -> 2.3.0"),
				  6	=> \@(0, "2.3.1 -> 2.7.7"),
				  7	=> \@(0, "3.0.x"),
				  8	=> \@(0, "3.1.x -> 4.0.x"),
				  9	=> \@(1, "4.1.x or greater"),
				)
			),
	0x061561 => 	\%(
			  Type     => "Hash",
			  Versions =>
				\%(
				  1	=> \@(0, "Unknown (older than 1.71)"),
        			  2     => \@(0, "1.71 -> 1.85"),
        			  3     => \@(0, "1.86"),
        			  4     => \@(0, "2.0.0 -> 2.1.0"),
        			  5     => \@(0, "2.2.6 -> 2.7.7"),
        			  6     => \@(0, "3.0.x"),
				  7	=> \@(0, "3.1.x -> 4.0.x"),
				  8	=> \@(1, "4.1.x or greater"),
				)
			),
	0x042253 => 	\%(
			  Type     => "Queue",
			  Versions =>
				\%(
				  1	=> \@(0, "3.0.x"),
				  2	=> \@(0, "3.1.x"),
				  3	=> \@(0, "3.2.x -> 4.0.x"),
				  4	=> \@(1, "4.1.x or greater"),
				)
			),
	) ;

die "Usage: dbinfo file\n" unless (nelems @ARGV) == 1 ;

print "testing file @ARGV[0]...\n\n" ;
open (F, "<", "@ARGV[0]") or die "Cannot open file @ARGV[0]: $^OS_ERROR\n" ;

my $buff ;
read F, $buff, 30 ;


my @(@info) =@( @( unpack("NNNNNNC", $buff) )) ;
my @(@info1) =@( @( unpack("VVVVVVC", $buff) )) ;
my ($magic, $version, $endian, $encrypt) ;

if (%Data{?@info[0]}) # first try DB 1.x format, big endian
{
    $magic = @info[0] ;
    $version = @info[1] ;
    $endian  = "Big Endian" ;
    $encrypt = "Not Supported";
}
elsif (%Data{?@info1[0]}) # first try DB 1.x format, little endian
{
    $magic = @info1[0] ;
    $version = @info1[1] ;
    $endian  = "Little Endian" ;
    $encrypt = "Not Supported";
}
elsif (%Data{?@info[3]}) # next DB 2.x big endian
{
    $magic = @info[3] ;
    $version = @info[4] ;
    $endian  = "Big Endian" ;
}
elsif (%Data{?@info1[3]}) # next DB 2.x little endian
{
    $magic = @info1[3] ;
    $version = @info1[4] ;
    $endian  = "Little Endian" ;
}
else
  { die "not a Berkeley DB database file.\n" }

my $type = %Data{?$magic} ;
$magic = sprintf "\%06X", $magic ;

my $ver_string = "Unknown" ;

if ( defined $type->{Versions}->{?$version} )
{
     $ver_string = $type->{Versions}->{$version}->[1];
     if ($type->{Versions}->{$version}->[0] )
       { $encrypt = @info[6] ?? "Enabled" !! "Disabled" }
     else
       { $encrypt = "Not Supported" }
}

print <<EOM ;
File Type:		Berkeley DB $type->{?Type} file.
File Version ID:	$version
Built with Berkeley DB:	$ver_string
Byte Order:		$endian
Magic:			$magic
Encryption:             $encrypt
EOM

close F ;

exit ;
