Initscripts rename_device binary rewritten using rust and renamed to ifcfg-devname.
Program ifcfg-devname reads ENV INTERFACE, which is expected to contain the name of the network interface. Then it looks for the hardware address of such an interface. After that it looks at the kernel command line for key-value-pair ifname=NEW_NAME:MAC_ADDRESS with given mac address. If a new name wasn't found and kernel cmdline it scans ifcfg configuration files in directory /etc/sysconfig/network-scripts/ and looks for configuration with HWADDR set to given hw address. If the program successfully finds such a configuration, it returns on standard output content of property DEVICE from matching ifcfg configuration. In all other cases it returns error code 1.
This repository provides source code for ifcfg-devname binary. The binary requires env INTERFACE to be set.
INTERFACE=eth0 cargo run --release
Environment variable INTERFACE takes name of the interface.
If you wish to run integration tests and unit tests, you can do so by:
cargo test