manipulating a BerkeleyDB-database

[peter barth]

Hi there,

I'm trying to manipulate an EXISTING BerkeleyDB3.2.9 database.

Everything is working fine if I implement:

    unlink $filename

and insert some keys,value pairs.

If I unlink the filename there are no key,value pairs available any more
which existed before, is this normal?

My problem is, that I need to manipulate the content of teh database
which exists, not one I need to generate before.

Any hints for that?

Here is the code:

#!/usr/bin/perl -wT

use strict;
use Fcntl;
use BerkeleyDB;

my $filename = "/root/doms.db";
my $dbvar = tie %domain, 'BerkeleyDB::Btree',
                        -Filename        => $filename,
                        -Flags            => DB_CREATE,
                        -Mode            => 0664
        or die "Cannot open $filename: $!\n";

foreach (keys %domain) {
    print "$_\n";
}

$dbvar->db_del("any_entry_which_exists_in_databse");

foreach (keys %domain) {
    print "$_\n";
}

--->> the second output is exactly as the first

Thank you for your help,

best regs

Peter Barth


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