Re: can dar handle Mac resource forks

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Paul Tremblay wrote:
| Can dar handle resource forks in the Macintosh file system? A resource
fork is data
| that is
| bundled along with the regular file. Traditional archivers like tar
cannot handle
| them. (A
| hack was invented for pax, called hfspax, which can handle these
resoure forks.)

I suppose you mean "resource forks" and "finder informations" (beside
the "data forks") ? This is a feature request that is not straight
forward to add properly in dar. For a given file, dar already handle the
inode information (file ownership, permissions, dates and so on), the
data (=data forks) and the Extended Attributes (when the filesystem
supports them). While all theses are common to many Unix filesystem
(ext2fs, ufs, minix (excluding EA), ...) the file forks are very
particular to Macintosh hfs filesystem which is not really a Unix
system, isn't it ?

By the way, have you succeeded running dar under Macintosh ?

macOS X is a Unix like system and does not seems to use file forks, am I
wrong ?

|
| If these resource forks do not get copied to the archive many files
will be useless.
|

yes, in particular executable files.


| Also, I was wondering about how dar handles compression. My impression
is that one
| should
| not use compression when using an archiver like tar, since one little
bit of corruption
| in the
| archive, and the whole archive is useless. Other archivers like afio
handle compression
| much
| better and are considered safe to use.

you can find a detailed explaination here:
http://dar.linux.free.fr/#feat
reading the "compression","direct access" and "Archive Testing" paragraphs

if this does not answer your questions read the following:
http://dar.linux.free.fr/notes.php3


|
|
|
|

Cheers,
Denis.
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