Question about IPC

[bodisha]

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