Re: [gentoo-user] Re: Is grub2 stable and who uses it?

[Canek Peláez Valdés]

On Tue, Oct 4, 2011 at 2:24 PM, Grant Edwards <grant.b.edwards@×××××.com> wrote:
> On 2011-10-04, Canek Pel??ez Vald??s <caneko@×××××.com> wrote:
>
>> Then any boot loader will need to call something to start it.
>> Understand this: any Linux/Unix init system (systemd, SysV, Upstart,
>> OpenRC) is simply a program... that the Linux kernel itself executes.
>
> I know.  What I don't understand is the statement that grub2 calls (or
> connects to) the init system.
>
>> That's the init= command line in the kernel.
>>
>> The bootloader calls an operating system. The init system (if at all)
>> that the OS uses doesn't matter: so if you have an operating system,
>> any bootloader should be able to boot it (bearing things like being
>> able to understand the filesystem etc.)
>
> I know how bootloaders like LILO and grub-legacy work.  What I don't
> understand is the statement that grub2 is somehow aware of the booted
> OS's init system.

Oh. The configuration file of GRUB2 is autogenerated, and this means
that the init=systemd has to be passed to the kernel line.

In that sense, GRUB2 is "aware" of it.

Regards.
-- 
Canek Peláez Valdés
Posgrado en Ciencia e Ingeniería de la Computación
Universidad Nacional Autónoma de México