🚀 go-pugleaf

Once a process is listening to a socket, is there anyway to
shutdown the socket and allow a new process to listen to the socket?
(without killing the process and all of it's children)?

In more detail:

I would like to be able to perform software upgrades to a batch server.
I want to kill the server, install the new program, and execute it.
However, the server might have batch jobs running, and I wish to leave
them intact, but as 'child processes' of the original batch server, they
cause the error message "internet domain bind: Address already in use" when
I try to restart a new server.

Is there any way to prevent children processes (created with fork/execl)
from inheriting open/bound sockets?

Is there any way to shutdown/unbind in the original server and children, so
that the new server can bind to the same address?  (If the answer is
"shutdown()" then I used it incorrectly, and an example would be appreciated).

I don't think that I want to use "setsockopt(... SO_REUSEADDR)" because then
ANY other process would be able to bind to the port.  Plus, I tried
this, and could not get it to work.  I need to see an example 
of how to use "setsockopt" if this is the answer.

David W. Thomas
dwthoma1@eos.ncsu.edu