IBM Mainframes have an IEFBR14 utility that sets a zero return code and does nothing else. It has a few bug reports against it but those have all been fixed and

IBM Mainframes have an IEFBR14 utility that sets a zero return code and does nothing else. It has a few bug reports against it but those have all been fixed and shouldn't need to be updated in the future. https://www.ibm.com/docs/en/zos-basic-skills?topic=utilities-iefbr14-utility-do-almost-nothing https://www.ibm.com/docs/en/zos-basic-skills?topic=utilities... https://en.wikipedia.org/wiki/IEFBR14 https://en.wikipedia.org/wiki/IEFBR14