Check_MK Werk 4499: Agent Updater: Prevent broken state files caused by incomplete writes

ID: 4499 Title: Agent Updater: Prevent broken state files caused by incomplete writes Component: agents Level: 1 Class: Bug fix Version: 1.5.0i1 When the agent updater is being executed it writes it's current deployment state to a state file. When the system is turned of suddenly it could cause a file corruption of the cmk-update-agent.state file. We prevent this now by writing to a temporary file first, flush it and then move it over to the state file path.