site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Hi all, I am writing a kernel driver.I have regestered it as character device. I am unable to implement the device write method (dev_write( dev_t device, struct uio *uio, int ioflag)) since I don't know how to retrieve the buffer from struct uio. However on trying to dereference uio as uio->uio_iov->iov_base gave a compilation error. Is there a KPI to retrieve the buffer sent from user space? You may want to read /usr/include/sys/uio.h... -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... On Sep 12, 2006, at 2:13 AM, sanjay yaragatti wrote: /* * uio_curriovbase - return the base address of the current iovec associated * with the given uio_t. May return 0. */ user_addr_t uio_curriovbase( uio_t a_uio ); You can also look at the kernel sources; in this case, the function is implemented in: <http://www.opensource.apple.com/darwinsource/10.4.7.ppc/xnu-792.6.76/bsd/ker...

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