Messages in this thread | | | Date | Wed, 2 Jun 2010 13:08:27 +0100 | From | Alan Cox <> | Subject | Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table. |
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On Tue, 1 Jun 2010 22:48:20 +0100 Matthew Garrett <mjg59@srcf.ucam.org> wrote:
> On Tue, Jun 01, 2010 at 02:43:12PM -0700, Justin P. Mattock wrote: > > On 06/01/2010 02:29 PM, Matthew Garrett wrote: > >> So, just to be clear, you run this as root and it immediately returns > >> you to the prompt? This seems unlikely. > > > > yep.. with the above code > > I (save to a file) then > > non-root gcc reboot.c -o reboot > > then su > > ./reboot > > just bake to the command prompt > > Are you running some sort of security policy that might block hardware > access?
Try
if (iopl(...)) perror
... (or strace it running as root)
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