Usage of kern_* functions in kernel

Marc Lörner marc.loerner at hob.de
Fri Apr 27 06:43:22 UTC 2007


On Thursday 26 April 2007 19:49, John Baldwin wrote:
> 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.

so, you would recommend using the vn_* functions instead?

--
Marc


More information about the freebsd-hackers mailing list