[2.1.0] Checkmk Werk 17070 created: Agent controller on Linux: More informative error message in case of file reading erros in import mode

Title: Agent controller on Linux: More informative error message in case of file reading erros in import mode Class: fix Compatible: compat Component: checks Date: 1718987988 Edition: cre Level: 1 Version: 2.1.0p45 On Linux systems, the agent controller always runs as the cmk-agent user, independently of the user starting the controller. Hence, in import mode, the input file must readable by the cmk-agent user. Otherwise, the import will fail. As of this werk, the controller displays a more informative error message in this case, hinting at the point that the input file must be readable by cmk-agent.