On Mon, Jul 25, 2005 at 04:35:20PM +0400, Felix-KM wrote: > I can't understand how to use the function copyout(). > It is necessary to write the data from a device driver to the > array defined in user program. > I do it this way: > > #define IOCTL_GET_B _IOWR("F", 127, 0x4)
<snip> > Here I get EFAULT. > > What have I done wrong? How can I do it correctly? You may need to add your ioctl to another middle layer. For example, to add ioctls to network devices, I first added defines to sockio.h only, and it wouldn't work ("device not configured"). Then I found out that I had to add my ioctls to a rather large switch statement in if.c too. hope this helps, -- stefan http://stsp.in-berlin.de PGP Key: 0xF59D25F0 _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"