[Buildroot] My own init. How?

[Buildroot] My own init. How?

[Lennart Ramberg]

Hi,

I built a system successfully and used grub-bios-setup;
$ sudo ./output/host/usr/sbin/grub-bios-setup -b
./output/host/usr/lib/grub/i386-pc/boot.img -c ./output/images/grub.img -d
. /dev/sdX
I have disabled the 'Run a getty (login prompt) after boot.'

When my targetsystem thus has booted, I get a blank line.
Typing echoes to the display including pressing Enter giving a new blank
line.
That seems well, though I don't know what to expect to see from Busybox
init.

Now, I want to try my own init, a 'Hello, world'. Busybox FAQ says: '...
boot your device with an "init=" argument pointing to your hello world
program'.
How do I do that?

Thanks
Lennart
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[Buildroot] My own init. How?

[Yann E. MORIN]

Lennart, All,

On 2014-08-21 10:37 +0200, Lennart Ramberg spake thusly:
> I built a system successfully and used grub-bios-setup;
> $ sudo ./output/host/usr/sbin/grub-bios-setup -b
> ./output/host/usr/lib/grub/i386-pc/boot.img -c ./output/images/grub.img -d
> . /dev/sdX
> I have disabled the 'Run a getty (login prompt) after boot.'
> 
> When my targetsystem thus has booted, I get a blank line.
> Typing echoes to the display including pressing Enter giving a new blank
> line.
> That seems well, though I don't know what to expect to see from Busybox
> init.
> 
> Now, I want to try my own init, a 'Hello, world'. Busybox FAQ says: '...
> boot your device with an "init=" argument pointing to your hello world
> program'.
> How do I do that?

You should pass this 'init=/path/to/your/hello-world' on the kernel
command line.

Since you're using grub, you need to edit output/target/boot/menu.lst .

Regards,
Yann E. MORIN.

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