Usage of kern_* functions in kernel

John Baldwin jhb at freebsd.org
Thu Apr 26 19:08:44 UTC 2007


On Thursday 26 April 2007 08:08:19 am Marc Lörner wrote:
> Hello,
> I googled but found nothing about the usage of the kern_* functions 
> (kern_open, kern_close, kern_pwritev, kern_preadv) that are located in 
> vfs_syscalls.c
> 
> When I use kern_open to open a file within the kernel, I get an error. 
> When I use the normal vn_open function instead, all works well.
> 
> So my question is which functions are recommended by you kernel-hackers 
> for use within kernelspace?
> 
> And here a second question: Is it possible to open/use the console driver in 
> kernelspace within the functions mentioned above? 
> If not, can you give me some pointers on where I can find this information!

kern_XXX are generally used by system calls such as alternative ABIs, etc.

-- 
John Baldwin


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