Bug#796603: closed by Anton Zinoviev <email@example.com> (Bug#796603: fixed in console-setup 1.138)
On 4 March 2016 at 14:40, Anton Zinoviev <firstname.lastname@example.org> wrote:
> On Fri, Mar 04, 2016 at 11:23:54AM -0300, Felipe Sateler wrote:
>> There is still keyboard-configuration.sh in runlevel S. So this
>> problem is still present.
> Yes. The problem however is much smaller because this script does not
> require $remote_fs.
Right. The real problem however, is that rcS support is a
debian-specific patch, and the systemd maintainers would like to drop
it to decrease maintainance workload.
>> I suggest including a service file like this:
> Unfortunately, I will not be able to maintain this file or to update it
> in accordance with future changes in systemd. So I suppose that unless
> you or somebody else volunteers to maintain it, it will be better to
> continue without it.
As long as the initscript does simple things, it should require very
little maintainance. While I can't commit to maintain it (I am no
expert in console matters), feel free to CC pkg-systemd-maintainers or
myself if you ever receive a bug about this.
>> Description=Set preliminary keymap
> 'Set the console keyboard layout' is a better description. The new
> console-setup is better optimized for speed and configures the keyboard
> only once.
> What is the meaning of these two?
This ensures it is run before systemd attempts to fsck and mount any
local filesystems. It is therefore a relatively appropriate
replacement for the checkroot dependency.
>> After=udev.service keymap.service
These two were copied as-is from the LSB headers
> The reason for keymap.service is that the keymap of console-setup can
> take precedence to the keymap provided by the package kbd (I am not sure
> this package still configures the keyboard, in the past it did).
There does not appear to be a keymap init script:
% apt-file search etc/init.d/key
This can be dropped then.
> The keyboard configuration depends on the existence of /dev/null and
> /dev/tty[1-6]. I have no idea whether this small dependency requires
These are created by the kernel when devtmpfs is mounted, and systemd
mounts /dev before starting any units, so they should be available,
> What does this do? This file is used (optionally) only in abnormal
It reads the key-value pairs from the file (if it exists), and exports
them as environment variables. Shell commands are not supported, only
>> ExecStart=/bin/setupcon --keyboard-only
> One novelty in version 1.138 is that it is unnecessary to run setupcon
> in order to configure the console. It is OK to configure the keyboard
> in this way, but this usually will be slower than what the script
> keyboard-setup.sh does -- instead of setupcon it runs
> /etc/console-setup/cached_setup_keyboard.sh and reverts to using
> setupcon only when this script doesn't exist of fails.
IMO, the init script should be as dumb as possible, as it is a
conffile. Therefore all program logic should move outside the script
and into a helper script that lives in /lib. This way, improvements
are guaranteed to be shipped to users.
I don't think it is reasonable to try to replicate the logic in
keyboard-configuration.sh via systemd dependencies. I would instead
split out a script as mentioned, and invoke that (instead of setupcon)
in the ExecStart line. If you do not want to extract the logic to a
separate script, then the course of action should be to drop the
EnvironmentFile, and have
to delegate all the logic to the init script.
Note that the important part for us is not the amount of work a given
runlevel S script does, but rather that the dependencies are defined
by the systemd unit, and not autoguessed from the LSB headers.
The resulting unit would be:
Description=Set the console keyboard layout
# Alternatively, if the setup logic is split to a separate script: