Re: execve() in reboot.c ?

[aq <aquynh@gmail.com>]

On 7/26/05, Mark Williamson <mark.williamson@cl.cam.ac.uk> wrote:
> > > Can't we just fire off a kernel thread to call sys_reboot and friends
> > > directly?  It seems unfortunate to have to rely on userspace
> > > applications, having gone to the trouble of handling the cmsg in the
> > > kernel.
> >
> > That doesn't do a graceful shutdown of running processes, does it?
> 
> Hmmmm, I suppose not.  Ah well, I think I'll withdraw my previous statement as
> I can't think of another way to do this right now :-)
> 

actually what you suggested is in use now ;-). firstly, the code use
daemonize() to become kernel thread, then execute userspace code
(shutdown/poweroff/halt...). if that failed (for example in case there
is no such userspace binary), sys_reboot is called.

i dont see why we try to call userspace comand first, then fail thru
to sys_reboot(). why just call sys_reboot()?


regards,
aq