I'm begginer in using c ( platform of linux)
the problem is that idon't know name of function that ineed
First Iwant to make simple applications to be able to go through it step by step.

Can any one know functions used to accomplish that simple program

=>Run/stop a specific process (time dependent).
it means that user will enter the path of the program that he wants to execute & the time that program will run & stop
=>Send specific signal depending on specific conditions.
first all signals(e.g. kill,etc...) must be shown to the user then he'll choose one of them to be activated