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Windows lets you develop a filter driver to catch file I/O’s on VFS. But I can’t seem to find something similar for Mac. It does have something called Filter Schemes, but those are for HFS+. Anyone know if there is a way for me to intercept file I/O’s on Mac without using programs like MacFUSE?
I found out that Mac OS X does not allow filter drivers at all.
“A stacking file system (sometimes called a filter file system) sits on top of another file system and modifies its behavior in some way. The canonical example of a stacking file system is an encryption file system. You could stack this file system on top of any existing file system to provide encryption support. Apple does not support the development of stacking VFS plug-ins on Mac OS X” (http://developer.apple.com/mac/library/qa/qa2001/qa1242.html)