Ronan Pigott
d6aed1dca8
run0 doesn't actually use the auth pam stack, since polkit does the requisite authorization. However, if the service type is left undefined pam falls back to the definitions of the "other" service, which, at least in Arch Linux but possibly more, includes pam_warn.so to notify the user about this apparent error. This creates a bit of logspam, as systemd does actually call pam_setcred in its generic pam code, which depends on the auth pam stack, creating a warning message in the journal on every invocation of run0. pam_deny.so is a no-op, which avoids falling back to the other pam service.
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