On Wednesday, April 3, 2002, at 11:34 PM, Rita wrote: hi, sorry but I don't understand a thing: MacOsX's kernel is composed of five components: bsd,mach,iokit,networking, file system. and why are there only four libraries with CFBundleIdentifier: com.apple.kernel.bsd com.apple.kernel.mach com.apple.kernel.iokit com.apple.kernel.libkern? what do they serve to? Each of them have specific services..which ones? Rita, The "com.apple.kernel" identifier covers the entire kernel (all 4 subcomponents). The version of this identifier (and it's backwards-compatibility version) is bumped with each new release, so if you declare a dependency on this, your driver will only load on a single release of Mac OS X / Darwin (whichever kernel matches the version you asked for). This is not generally a good choice unless you really want to lock the software into running on a single OS version. The other four identifiers cover the major food groups of the Darwin kernel. The exact list of which APIs go with which identifier isn't available, but they pretty much map to the headers in Kernel.framework: com.apple.kernel.iokit covers APIs in Kernel.framework/Headers/IOKit/* com.apple.kernel. libkern covers APIs in Kernel.framework/Headers/libkern/* com.apple.kernel.mach covers APIs in Kernel.framework/Headers/mach/* com.apple.kernel.bsd covers APIs in .../sys/*, .../net*/*, .../kern/*, .../bsd/*, ../vfs/* and several more. If you include a header from one of these places, you need to make sure and list the associated identifier in your kext's OSBundleLibraries property. We are working to make this more obvious (like, putting the CFBundleIdentifer right in the headers or in readme files!) The general rule is that I/O Kit drivers depend on: IOKit, Libkern, and one or more IOKit families. Loadable filesystems and NKEs usually only depend on bsd. - Dean _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.