aliasing (or renaming) kern.geom.debugflags
kaduk at MIT.EDU
Fri Oct 7 18:54:46 UTC 2011
On Fri, 7 Oct 2011, Warren Block wrote:
> On Fri, 7 Oct 2011, Arnaud Lacombe wrote:
>> On Fri, Oct 7, 2011 at 2:13 PM, Warren Block <wblock at wonkity.com> wrote:
>>> On Fri, 7 Oct 2011, Poul-Henning Kamp wrote:
>>>> In message <alpine.GSO.1.10.1110071341430.882 at multics.mit.edu>, Benjamin
>>>>> Now, an ordinary user who is
>>>>> doing this for the first time might ask, "why do I need to do something
>>>>> with 'debugflags' in order to make a USB stick?
>>>> Which is the exactly right question to ask.
>>>> The procedure documented is clearly flawed.
>>> Probably a misunderstanding on my part, since I suggested it to Glen.
>>> recall the circumstances exactly.
>>> The next question would be: what is the correct procedure?
>> I'd guess the procedure involves shooting your feet:
>> from `sys/geom/geom_subr.c':
>> /* If foot-shooting is enabled, any open on rank#1 is OK */
>> if ((g_debugflags & 16) && pp->geom->rank == 1)
> Well, yes. The goal is to unprotect the device, regardless of what may
> already be on it. Then the user can overwrite it with the memory stick
> The current documentation is
> sysctl kern.geom.debugflags=16
> dd if=memstick.img of=/dev/whatever0 bs=64k
I presume that Poul-Henning was not claiming that the documentation did
not match the functional procedure, but rather that the procedure needed
to achieve the goal (of a functional USB stick) is flawed. (Even if it is
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