[OE-core] [PATCH] Remove ttyS* from /etc/inittab that are not present

[Koen Kooi]

Op 19 nov. 2011, om 19:59 heeft McClintock Matthew-B29882 het volgende geschreven:

> On Sat, Nov 19, 2011 at 8:29 AM, Otavio Salvador
> <otavio at ossystems.com.br> wrote:
>>> It must be online though in this case?
>> 
>> The code you add needs to be running on target and doesn't work at
>> rootfs built time. This is bad and adds more complications to
>> read-only-fs support.
> 
> This works *perfectly* with a read only fs. Each time it boots removes
> the non-working serial ports. One could argue that it does NOT work
> completely as expected with a writable file system.
> 
>>>> This could be done with a specific package that could mangle the
>>>> image at first boot if really need but doing it by default on oe-core
>>>> seems the wrong way.
>>> 
>>> Isn't that exactly what this is doing?
>>> 
>>> Easy enough to add this to a separate recipe or bbapends elsewhere if
>>> there is disagreement.
>> 
>> The need to diverge from machine default is the exception and this
>> could be handled on the image being built, as post rootfs hook or an
>> specific package with postinst to be run at target boot to setup it,
>> and not by default.
> 
> This will not work as a post rootfs hook as I've explained before. Let
> me give you a more concrete example: We have a root file stored in
> flash. We use it to boot from on a system with 4 serial ports. We use
> the same image again to boot several kvm instances each of which only
> have 1 serial port. The kvm instances will have spurious init messages
> about respawning getty.

Or you could just ditch sysvinit and switch to systemd. Systemd will only spawn a getty when udev says the device is there. And even better, every getty config is a file you can delete to disable it if for some reason the kernel reports the serial port to be there and you don't want a getty.

regards,

Koen