sub init_commands
{
    # Fill %Commands hash for parsecommands
    # %Commands{commandname}{pattern} =
    # %Commands{commandname}{function} = ['modulename', [['name', number of arguments]]
    # %Commands{commandname}{syntax} =

    $Commands{'log'}->{'pattern'} = '^log (.*)$';
    $Commands{'log'}->{'function'} = ['', ['createlog', 1]];
    $Commands{'log'}->{'syntax'} = 'log <filename> <new/append>';

    $Commands{'modules saveall'}->{'pattern'} = '^modules saveall$';
    $Commands{'modules saveall'}->{'function'} = ['', ['savemodules', 0]];
    $Commands{'modules saveall'}->{'syntax'} = 'modules saveall';

    $Commands{'modules loadall'}->{'pattern'} = '^modules loadall ([\w\.]+)$';
    $Commands{'modules loadall'}->{'function'} = ['', ['loadmodules', 1]];
    $Commands{'modules loadall'}->{'syntax'} = 'modules loadall <filename>';

    ... and so on..
}