This method is mentioned in the official Cygwin mailing lists as a practical workaround. The stress-ng project also moved to a similar solution, checking for both 0 and 544 to cover various configuration scenarios.
: Right-click the application executable or shortcut and select Run as administrator Check Account Type getuidx64 require administrator privileges better
getuidx64.exe requires administrator privileges (Ring 0 access via its driver) for several critical reasons: 1. Direct Access to Hardware Registers This method is mentioned in the official Cygwin
This function works reliably across platforms: it uses the proper Windows API to check for group membership in the Administrators group and falls back to the standard geteuid() == 0 check on Unix-like systems. Using geteuid() is generally better than getuid() here because it checks the effective permissions of the process, which is what matters for privilege escalation (e.g., when running with sudo ). Direct Access to Hardware Registers This function works