Hello and thanks in advance for any help anyone can offer to help me understand this

I'm curious about a 30.000 ft view on how IPC works in Linux between parent-child processes...I understand there's multiple types of IPC's... But I'm currently trying to figure out if parent-child process IPC communications go thru the API on the way to the kernel

For example... if the bash shell forks a ps command process... I'm assuming the ps process uses IPC to communicate the results back the the bash shell... If this is how it works I'm trying to figure out if it goes thru the API... I'm guessing it does but I can't find anything that specifically states that

Once again... thanks for any help anyone can offer me

When Unix IPC was designed, it was not called API yet.

This is a good explanation: http://www.tldp.org/LDP/tlk/ipc/ipc.html

Keep in mind that this was designed in the late 1960 - early 1970-ies. It is about as fundamental as stack pointers and subroutines.

You won't find how processes in a GUI framework communicate I think. That is different AFAIK. And terribly complicated.

jlinkels