use of setsid()?

[DeepBlack]

Hi,

What exactly is the use of a setsid()?

I notice that when I call a setsid() in the child's part of code, and run the program and do a 'ps -al' there is only one process in the list that is running (which I believe is the child, correct me if I'm wrong).

How does making the child the process group leader, remove the parent process altogether?

I wasn't able to find answers to my satisfaction in a google search, I'd really appreciate if someone could help me out with this!


Thanks,
DeepBlack

[Peter87]

If I understand it correctly ps -al will not show session leaders so I don't believe that it is the child process that you see. Why don't you print the process ID from the child process and compare it to the list.