[drew22]

When I unzip a Mac Os X zip archive on Linux, I get a file beginning with "._" for every regular file in archive. I tried filtering out these files using with unzip archive.zip -x "*._" but the "*._" files still came through. What I think is happening is the _files with names beginning with "._" are being created from the extra Mac OS X file info, so the exclusion doesn't work because the files aren't really there to begin with. I tried the -i and -J options with unzip but got syntax error.

To reproduce this problem, on MacOS X just create zip archive of a folder, ftp to Linux machine and unzip. You should see a file beginning with "._" for every regular file your Mac Os X created zip archive.

[JNI]

Yeah, when you use the Archive command in the Finder contextual menu it will always add Mac meta-data to the archive. It's kinda broken. I can see the need for it when the source file has creator/type info or resource forks, in which case you would want to preserve that stuff so the original can be recreated exactly for proper Mac usage, but unfortunately the Finder archive item creates that stuff even if you archive a raw binary file. It shouldn't do that, but that's just the way it is right now.

You will need to use something else other than Finder Archive if you want to create a raw zip archive sans the meta data. I think DropZip or ZipIt does a smarter job. Personally I use OnMyCommand to invoke the command line gzip tool when I want to create a raw zip archive.