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End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Process.setsid

Process.setsid → integer

Establishes this process as a new session and process group leader, with no controlling tty. Returns the session id. Not available on all platforms.

Example
Process.setsid   #=> 27422
See also .setrlimit .spawn .setproctitle .times also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0