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Date: Tue, 5 Nov 2002 14:39:14 -0800 (PST)
From: Dave McCammon <davemac11@yahoo.com>
Subject: Re: Junior hacker assignment :o 
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--- Dave McCammon <davemac11@yahoo.com> wrote:
> --- Mike Hogsett <hogsett@csl.sri.com> wrote:
> > 
> > 
> > Look in /usr/src/sys/kern/kern_shutdown.c
> > 
> > static void
> > shutdown_halt(void *junk, int howto) {
> > ...
> > }
> > 
> > Looks interesting.
> > 
> >  - Mike
> > 
> > > Hi,
> > > 
> > > --- Mike Hogsett <hogsett@csl.sri.com> wrote:
> > > > Well whatever function the kernel is in while
> it
> > > > loops, polling the
> > > > keyboard asking "press any key to reboot"
> could
> > have
> > > > additional logic for
> > > > a countdown timer to reboot.
> > > 
> > > Great!
> > > 
> > > > How and where to do this?  I don't know.
> > > 
> > > Not so great ;)
> > > 
> > > Thanks a lot,
> > > Carlos.
> Not a real programmer but....
> 
> I wonder if adding the following (taken from
> shutdown_reset lines in kern_shutdown.c)
> DELAY(1000000); 
> cpu_reset();
> 
> to the following in the cpu_halt(); area would work.
> 
> You would have to modify the delay time.
> 
> /*
>  * If the shutdown was a clean halt, behave
> accordingly.
>  */
> static void
> shutdown_halt(void *junk, int howto)
> {
>   if (howto & RB_HALT) {
>      printf("\n");
>      printf("The operating system has halted.\n");
>      printf("Please press any key to reboot.\n\n");
>          switch (cngetc()) {
>          case -1:       /* No console, just die */
>              cpu_halt();
>               /* NOTREACHED */
>              default:
>                 howto &= ~RB_HALT;
>                  break;
>                 }
>         }
> }


DUH!! on my part. My previous response was a little
overboard.

Why not just increase the delay to close to your
ups battery's runtime. 
(from kern_shutdown.c, starts on line 380)

/*
 * Everything done, now reset
 */
static void
shutdown_reset(void *junk, int howto)
{
        printf("Rebooting...\n");
        DELAY(1000000); /* wait 1 sec for printf's to
complete and be read */
        /* cpu_boot(howto); */ /* doesn't do anything
at the moment */
        cpu_reset();
        /* NOTREACHED */ /* assuming reset worked */
}

 


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