Re: updating kdar to work with libdar 4 (dar 2.3.1)

Hi Denis,

Thank you for the details, I had discovered some of them a little last
night, but it was hard to figure out.

I'll be having a go at updating some of kdar bits over the next
weekend.  I appreciate all the help and time you've giving me, really
encourages me to work on making kdar work well.

Regards
Glen Ogilvie

On 2/22/07, Denis Corbin <[email protected]> wrote:
>
>
> Glen Ogilvie wrote:
> >
> > Dennis, have you managed to put togeather a summary of the API
> > changes?  It would help in updating kdar to use them.
> >
>
> Point 1: [taken from the ChangeLog and diff] :
>     added -[ and -] options (file selection from file listing)
>     Important consequence for libdar user programs:
>     the fs_root argument is now expanded to full absolute path inside
>     libdar, thus the mask you will give for path inclusion/exclusion
>     (the "subtree" argument) will be used against full absolute path
>     of files under consideration for the operation. Assuming you have
>     fs_root=tmp/A and the current directory is /var/tmp, your mask will
>     be used against strings like /var/tmp/A/some/file. (instead of
>     tmp/A/some/file as in the previous API version). Things are equal
>     if the fs_root is given an absolute path.
>
> In other word, the fs_root argument (in all public archive's methods
> that use it) has to use become an absolute path, when user provides a
> relative path.
>
> fs_root is an object of class path, the is_relative() method can let you
>   know whether a path is relative or not. If it is relative, find the
> current working directory (getcwd() system call for example) build a
> temporary path object (let's call it cwd_path) with the getcwd() string
> (constructor works with std::string that can be also built from char *)
> and before passing fs_root, set it to absolute with the path::operator+
>
>      fs_root = cwd_path + fs_root;
>
> This has to be done for any 'fs_root' argument in the archive methods.
>
> Point 2: the 'pause' argument moved from boolean to infinint.
>
>     replacing the boolean argument by the following expression will keep
> the same feature:
>
>         original_provided_boolean_argument ? 1 : 0
>
> (if true -> pause every 1 slice else do not pause at all)
>
> Point 3: root_EA and user_EA has been replaced by a mask 'ea_mask'.
> to keep the same behavior you have to build a mask as follows and use it
> in place of root_EA and user_EA:
>
>      ou_mask ea_mask; // build an empty mask that does the *or* operation
>
>      if(root_EA)
>         ea_mask.add(simple_mask("system.*"));
>      if(user_EA)
>         ea_mask.add(simple_mask("user.*"));
>      if(!root_EA && !user_EA) // if ea_mask is still empty
>         ea_mask.add(bool_mask(false));
>
>     // note that if ea_mask is empty (both root_EA and user_EA
>     // are false) you can avoid using an ou_mask object by directly
>     // using a bool_mask(false) object as argument (this does the same
>     // but will save some CPU cycles.
>
> Point 3: ignore_owner (boolean) has been replaced by 'what_to_check'
>     of type inode::comparison_fields, which is declared in catalogue.hpp.
>     here the equivalent behavior is realized by the following expression:
>
>      what_to_check = ignore_owner ? cf_ignore_owner : cf_all
>
>
> Point 4 : as opposed to point 1 to 3 that are general to the different
> public archive's class methods, this point does only apply to the
> 'create' constructor of archive class:
> between the 'same_fs' and the 'ret' argument (which is the last of this
> method), took place 4 new arguments corresponding to four new features:
>
> for backward compatibilty:
>
>     - snapshot (boolean), has to set to false
>     - cache_directory_tagging (boolean) has to be set to false also
>     - display_skipped (boolean) has to be set to false also
>     - fixed_date (infinit) has to be set to zero
>
> Point 5 : still in the same 'create' constructor, the last argument
> 'ret' has been changed of name ('progressive_report') and type (pointer).
>
> here, providing the address of the original argument (thanks to the &
> operator) will do the trick.
>
> Point 6 : archive::op_extract received a new argument 'ea_erase'.
> For backward compatibility set it to false. (Point 1 to 3 also apply to
> this method as well as point 5).
>
> Point 7 : archive::op_listing has seen the tar_format boolean argument
> been replaced by list_mode of type listformat.
>
>      listformat = tar_format ? normal : tree
>
> (I guess op_listing is not used in kdar, but...)
>
> Point 8 : archive::op_diff has point 1 to 3 and point 5 that do apply.
>
> Point 9 : archive::op_test has point 1, 3 and 5 that apply.
>
> Point 10 : the statistic type has been changed from struct to class
> the different field that were accessible directly before has to be
> read throw the get_*() methods. For example:
>
>    statistics_obj.treated
>
> has to be replaced by
>
>    statistics_obj.get_treated()
>
>
> That's all the changes I could found that are officially part of the
> API, I know however that Johnathan has used some useful tools from the
> tools.hpp/cpp module. No much change there, but rather several new
> functions have been added, but in case of problem here don't hesitate to
> ask me.
>
> I wish you success!
>
> Kind Regards,
> Denis.
>
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