Systems Programming

Daemons

Double-fork technique

1. The parent process forks and exits.
2. Child process creates a new session via setsid() and becomes a new session leader.
3. In the new session it forks again (grandchildren) to prevent attaching to a terminal. Here is where the daemon itself gets executed.

Additional Resources

Books

• Linux System Programming Techniques by Jack-Benny Persson (2021) (1789951283)