[systemd-devel] Github systemd issue 6237

[Reindl Harald]

Am 06.07.2017 um 01:36 schrieb Michael Chapman:
> Note that the semantic validations you're talking about here -- things 
> like "does the user exist?" -- are _not_ preemptive. They are fatal: the 
> child process will exit unsuccessfully as the command is executed if the 
> settings will not be able to be applied.
> 
> User=0day fails a syntactic validation, not a semantic validation. 
> systemd never even checks to see whether the user exists when the unit 
> is loaded. And nor should it! The user must be allowed to not exist at 
> unit-load time.
> 
> Contrary to some of the comments in this thread, there is no point in 
> systemd's operation where it goes "oh look, that user actually exists 
> but I'm going to pretend it doesn't"

well, it even don't look but pretend it can't while it does which is the 
worst type of operations possible - as long as "adduser" of the 
underlying OS accepts and create "0pointer" systemd has *no business at 
all* to pretend it can't