How to kill background process from system function call

Question

How can I kill a background process that was executed using a system function call in C language. Like for example I have a compiled application call "fooprocess". Then I want to write a program that will execute the fooprocess application in the background using the system function, please kindly see below the code,

const char app[] = "fooprocess &";
system(app);

As you can see there is a "&" character so that I can run the fooprocess application in the background. How can I kill this fooprocess?

Many thanks.

Answer 1

To interact with the process you need its PID. I'm not sure if it's possible with system but one alternative is to fork the process yourself using fork + exec.