I do not think that using sysctl as a private communication mechanism between a KEXT and a daemon is a good idea. There are many alternative to choose from,: - local sockets - device - SYSPROTO_CONTROL sockets Because you seem to be using a NKE, I would recommend using a local socket or a SYSPROTO_CONTROL socket. SYSPROTO_CONTROL sockets they have be designed to provide a control mechanism between user space and NKE and you won't have to switch funnels (looking back into the archive that was first suggesed by Ollie 2 weeks ago). There is no man page and no documentation about using SYSPROTO_CONTROL sockets but you can learn how to use them by looking at the ppp project. The header file is <sys/sys_domain.h> Vincent PS: Always keep in mind the current NKE API is unstable and subject to change in the future. On Feb 12, 2004, at 11:04 AM, matt jaffa wrote: Right now I am having my Daemon do a sysctlbyname and setting a value in the KEXT to make it aware that it is running, does this sound like an ok way to do it. On Thursday, February 12, 2004, at 11:20 AM, Vincent Lubet wrote: On Feb 11, 2004, at 6:25 PM, Matt Jaffa wrote: Also is there a way for the KEXT to detect if a daemon is running? This is done by having the daemon to initiate some kind of communication channel to the KEXT. This way the daemon becomes a kind of client of the KEXT. If there are no communication channel, there is no daemon running. _______________________________________________ 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.