pub fn init_from_env() -> Result<(), String>Expand description
Read LOG_ENV_VAR and install the stderr subscriber it asks for.
Unset or blank installs nothing — see the module docs.
§Errors
A value that does not parse as EnvFilter directives, or a subscriber
already installed for this process. Both abort startup rather than run
the daemon with logging silently different from what the operator asked
for — same posture as the config file (crate::config): a daemon
quietly running on defaults the operator believes they overrode is worse
than a loud failure at boot.