forking child processes in src/backend/main/main.c

HI,
In our project, we have unix socket networking going on and the Postgresql 
code is the server in this process. We would want the postgresql database to 
run as usual while it is transferring data (as a server) to another program 
(the client, in our case, a GUI). Therefore, we would want to fork another 
process that acts as the server.
Would anyone kindly suggest where would be the best place for us to call 
fork() in this case?
Would this src/backend/main/main.c be a good place to put the fork() and 
server code?
If yes, in which part in particular, or does it matter?
If not, in which file would it be better to put it?
Thank you,
Sumaira





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