Idea for change to boot0

[Luigi Rizzo]

On Thu, Dec 15, 2011 at 04:21:51PM -0500, Andrew Boyer wrote:
> These two changes allow you to set PXE as the default MBR boot selection, which enables you to write a 'reboot to the network' script.  We've found it to be very useful.  What do people think?

seems good to me. John's comments also apply, no need to use
cryptic parameters in boot0cfg

cheers
luigi

> Thanks,
> Andrew
> 
> > Index: usr.sbin/boot0cfg/boot0cfg.c
> > ===================================================================
> > --- usr.sbin/boot0cfg/boot0cfg.c	(revision 228359)
> > +++ usr.sbin/boot0cfg/boot0cfg.c	(working copy)
> > @@ -169,7 +169,7 @@
> >             o_flag = 1;
> >             break;
> >         case 's':
> > -            s_arg = argtoi(optarg, 1, 5, 's');
> > +            s_arg = argtoi(optarg, 1, 6, 's');
> >             break;
> >         case 't':
> >             t_arg = argtoi(optarg, 1, 0xffff, 't');
> > @@ -472,6 +472,8 @@
> >     printf("default_selection=F%d (", mbr[OFF_OPT] + 1);
> >     if (mbr[OFF_OPT] < 4)
> > 	printf("Slice %d", mbr[OFF_OPT] + 1);
> > +    else if (mbr[OFF_OPT] == 5)
> > +        print("PXE");
> >     else
> > 	printf("Drive 1");
> >     printf(")\n");
> > Index: sys/boot/i386/boot0/boot0.S
> > ===================================================================
> > --- sys/boot/i386/boot0/boot0.S	(revision 228359)
> > +++ sys/boot/i386/boot0/boot0.S	(working copy)
> > @@ -413,6 +413,7 @@
> > 	3:
> > #endif /* ONLY_F_KEYS */
> > #endif /* SIO */
> > +check_selection:
> > 		cmpb $0x5,%al			# F1..F6 or 1..6 ?
> > #ifdef PXE /* enable PXE/INT18 using F6 */
> > 		jne 1f;
> > @@ -421,7 +422,6 @@
> > #endif /* PXE */
> > 		jae beep			# Not in F1..F5, beep
> > 
> > -check_selection:
> > 	/*
> > 	 * We have a selection.  If it's a bad selection go back to complain.
> > 	 * The bits in MNUOPT were set when the options were printed.
> 
> --------------------------------------------------
> Andrew Boyer	aboyer at averesystems.com
> 
> 
> 
> 
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