INTRO (9) NetBSD Kernel Developer's Manual INTRO (9) NAME ...

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KAUTH (9) NetBSD Kernel Developer’s Manual KAUTH (9)Note that the securelevel implications were also integrated into the kauth framework so you don’t have tonote anything special in the call to the authorization wrapper, but rather just have to make sure the securitymodel handles the request as you expect it to.To dothat you can just grep(1) in the relevant security model directory and have a look at the code.EXTENDING KAUTHAlthough kauth provides a large set of both detailed and more or less generic requests, it might be neededeventually to introduce more scopes, actions, or requests.Adding a new scope should happen only when an entire subsystem is introduced and it is assumed otherparts of the kernel may want to interfere with its inner-workings. When asubsystem that has the potential ofimpacting the security if the system is introduced, existing security modules must be updated to also handleactions on the newly added scope.New actions should be added when sets of operations not covered at all belong in an already existing scope.Requests (or sub-actions) can be added as subsets of existing actions when an operation that belongs in analready covered area is introduced.Note that all additions should include updates to this manual, the security models shipped with NetBSD, andthe example skeleton security model.SEE ALSOsecmodel(9)HISTORYThe kernel authorization framework first appeared in Mac OS X 10.4.The kernel authorization framework in NetBSD first appeared in NetBSD 4.0, and is a clean-room implementationbased on Apple TN2127, available at http://developer.apple.com/technotes/tn2005/tn2127.htmlNOTESAs kauth in NetBSD is still under active development, it is likely that the ABI, and possibly the API, willdiffer between NetBSD versions. Developers are to take notice of this fact in order to avoid building codethat expects one version of the ABI and running it in a system with a different one.AUTHORSElad Efrat 〈elad@NetBSD.org〉 implemented the kernel authorization framework in NetBSD.Jason R. Thorpe 〈thorpej@NetBSD.org〉 provided guidance and answered questions about the Darwin implementation.ONE MORE THINGThe kauth framework is dedicated to Brian Mitchell, one of the most talented people I know. Thanks foreverything.NetBSD 3.0 February 28, 2008 15
KCOPY (9) NetBSD Kernel Developer’s Manual KCOPY (9)NAMEkcopy —copy data with abort on page faultSYNOPSIS#include intkcopy(const void ∗src , void ∗dst , size_t len);DESCRIPTIONkcopy() copies len bytes from src to dst, aborting if a fatal page fault is encountered.kcopy() must save and restore the old fault handler since it is called by uiomove(9), which may be in thepath of servicing a non-fatal page fault. kcopy() returns 0 on success and an error number on failure.SEE ALSOerrno(2), memcpy(9), uiomove(9)NetBSD 3.0 April 4, 2006 1
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