gethostid
gethostid is a Unix-like system library function that returns the host identifier for the current machine. It provides a 32-bit value, typically returned as an unsigned long, that historically served as a machine-wide identifier for older network services and programs.
The host ID is commonly stored on the system as a 4-byte value, often in the file
In practice, the host ID has been used by legacy software such as the Network Information Service
Portability and implementation details vary by platform. The function is part of traditional Unix APIs and