systemd configuration with service configuration check

Hi,

Novice question: A service that can be run under systemd is given.
On the one hand, it is possible to check the configuration before starting, e.g. "sshd -t".
I would like a systemd configuration file that contains the configuration check.
For this, the '[Service] ExecStartPre=' directive seems appropriate.
However, I would like this to work when releasing a 'systemctl restart sshd.service'.
My problem is this: Since, as far as I know, under systemd the restart is actually a stop and a start call issued consecutively, stop *stops* the service, and start is shocked to find that the service cannot be started due to a misconfiguration if someone edits the configuration as recklessly as I do.
This would make restarting less trouble because the system will *work* with the old configuration.
If I also adopt systemd's ExecStop feature, I feel like I'm pretty much going into a stinging forest.
Can this task be solved?
If systemd had ExecStop[Pre,Post] and/or config test, life might be simpler.
Thank you in advance for your help.

Regards, István

[Barry Scott]

> On 28 Nov 2024, at 14:40, [e-mail] wrote:
>
> On the one hand, it is possible to check the configuration before starting, e.g. "sshd -t".

I am not sure what you expect this to help with.

If the config is bad the service will not start.

That is, I assume, exactly what having the sshd -t added will do.

Barry

[Barry Scott]

> On 28 Nov 2024, at 14:40, [e-mail] wrote:
>
> This would make restarting less trouble because the system will *work* with the old configuration.

I do not think it will allow for this.

Better that you get into the habit of checking the config after any change you make.
Otherwise a reboot will leave you without a working sshd.

Barry