Disable CTRL-ALT-DEL
Manolis Kiagias
sonic2000gr at gmail.com
Sat Oct 18 01:47:51 PDT 2008
Jeremy Chadwick wrote:
> On Sat, Oct 18, 2008 at 10:58:29AM +0300, Manolis Kiagias wrote:
>
>> Peter Boosten wrote:
>>
>>> Manolis Kiagias wrote:
>>>
>>>
>>>> Olivier Nicole wrote:
>>>>
>>>>
>>>>> Hi,
>>>>>
>>>>> On FreeBSD 6.3 how to disable the CTRL-ALT-DEL from halting/rebooting
>>>>> the system?
>>>>>
>>>>> Best regards,
>>>>>
>>>>> Olivier
>>>>>
>>>>>
>>>> There are two ways of doing this, both described in the FreeBSD FAQ here:
>>>>
>>>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/admin.html#CAD-REBOOT
>>>>
>>>>
>>> Hmmm, didn't know about the second one, and doesn't seem to be working
>>> either (on both 7.0 and 6.3):
>>>
>>> sysctl hw.syscons.kbd_reboot=0
>>> sysctl: unknown oid 'hw.syscons.kbd_reboot'
>>>
>>>
>>> Peter
>>>
>>>
>> It seems you are right. Just checked on 6.3 and 7.0 and it does not
>> exist. It does exist in 6.2, however.
>>
>
> Hmm...
>
> # sysctl hw.syscons.kbd_reboot=0
> hw.syscons.kbd_reboot: 1 -> 0
> # sysctl hw.syscons.kbd_reboot=1
> hw.syscons.kbd_reboot: 0 -> 1
> # uname -a
> FreeBSD icarus.home.lan 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Thu Oct 2 03:04:20 PDT 2008 root at icarus.home.lan:/usr/obj/usr/src/sys/PDSMI_PLUS_RELENG_7_amd64 amd64
>
>
Mystery solved.
The sysctl only exists if you have not already compiled the kernel with
options SC_DISABLE_REBOOT
I just checked, and all the systems that do not show this were compiled
with SC_DISABLE_REBOOT
I installed a clean (vmware) 7.0 and hw.syscons.kbd_reboot exists.
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