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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

class method

Process::UID.eid

Process.euid → integer
Process::UID.eid → integer
Process::Sys.geteuid → integer

Returns the effective user ID for the current process.

Example
Process.euid # => 501
See also .change_privilege .from_name .grant_privilege also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0