[systemd-devel] [PATCH] [RFC] Make reboot to support additional command

[Kay Sievers]

On Sat, Aug 24, 2013 at 6:12 AM, WaLyong Cho <walyong.cho at samsung.com> wrote:
> On 08/24/2013 01:47 AM, Zbigniew Jędrzejewski-Szmek wrote:
>> On Tue, Aug 13, 2013 at 03:01:25AM +0900, WaLyong Cho wrote:
>>> From: WaLyong Cho <walyong.cho at samsung.com>
>>>
>>> reboot syscall can be performed with additional argument. In some of
>>> system, this functionality can be useful to ask next boot mode to
>>> bootloader.
>> What are the possible values of this additional argument?
>> What systems support it?
>
> Any string can be. i.e. download and fota(firmware update by air) can
> be. In mobile system(actually tizen), if user try to update the firmware
> by air, then the system should be booted special mode at the next boot.
> To ask this information to bootloader, reboot can use boot parameter.

EFI supports something similar:
  http://wiki.phoenix.com/wiki/index.php/EFI_RUNTIME_SERVICES#ResetSystem.28.29

We need to be careful how to add or support that. If we do that, it
needs to be supported in PID1 and over the D-Bus interface too, I
guess.

Kay