Following the code from another answer, I want to read and write Finder comments to files. Those seem to be stored as binary plists so they have to be parsed beforehand. To read a Finder comment: l...

I have an NFS_Server - NFS_Client system. My client is mounted to an NFS_Server directory. I want to change the attribute of NFS_Server directory's files via NFS_Client mounted directory by using E...

I found some Linux files, and when I type ls -lah, it outputs this permissions format: ... drwxr-xr-x. 2 root root ... -rw-rw-r--. 1 root root ... I would like to know, what is the mean...

I am trying to perform a little testing of XATTRs. I recompiled my kernel with ALL the XATTRs enabled. Now, when I include the header of xattrs : #include <attr/xattr.h> I receive an erro...

The other day I was messing with some files that had the extended attribute com.apple.quarantine on them. I am aware of its purpose, but I have always been curious what the properties below meant w...

We were working on an IDE for a long time and it has com.apple.security.app-sandbox mode. User can download requisite SDK from internet (out of the box) and use in our IDE for development. Prior to...

When I type ls -l in the command line, sometimes an @ or + symbol comes up alongside the file permissions(btw, I am on OS X), as shown below: -rw-r-----@ 1 john staff 6731 Sep 28 01:10 mutations.t...

I'm trying to use terminal and the xattr to modify an extended metadata entry. It looks simple, but I don't have any success. Currently I tried something like below: xattr -w com.apple.metadata:k...

Preface I am working on a platform in-depended media database written in java where the media files are identified by a file hash. The user shall be able to move the files around, so I do NOT want ...

There is a lot of information on StackOverflow and elsewhere about how to clear the Mac quarantine property. In my case I would like to set it. This is in order to test that my app is properly sign...

This is a simple question but I've done some research and can't find any answers... So does anyone know if when we define extended attributes through xattr, those attributes are stored within - as ...

While reorganizing my images, in anticipation of OSX Mavericks I am writing a script to insert tags into the xattr fields of my image files, so I can search them with Spotlight. (I am also editing ...