needs to use Linux Process to finish this project needs to submit all source code

files $(.$c files$)$ to Project$-1$ section.

Project $1$: Design the Process Management System:

The program, once executed, should print the following interface for user to choose:

Create a new process

Terminate a process

Print active processes

Quit

Your choice $(1-4)$:

The user interacts with the program by entering an integer: $1,2,3,$ or $4.$ Each number triggers a

unique action. After completing the corresponding action, the program displays the same menu again,

prompting the user for the next integer input.

Regarding how to receive user input integer in $C$ :

int choice;

scanf$("\%$d$",$ &choice$)$; $//$ this function will block the program until user types an integer and hit

"Enter" key

$//$ after this line, variable "choice" will hold user input integer.

Action for $"1.$ Create a new process":

The program should create a new $($child$)$ process, which will go the infinite sleep. Refer to code

forkMANY.c$.$ This is the ONLY place that your code can call sleep$()$ function.

Action for $"2.$ Terminate a process":

The program will ask $($receive user input integer$)$ PID of the process to terminate. If the PID is valid

$($process with that PID was created and exists$),$ then the program kills the process with that PID;

otherwise, the program prints $"$no such PID" and goes back to the interface again. Refer to "man $2$

kill" for more details of how to terminate a process.

Action for $"3.$ Print active processes":

The program should print all PIDs that were created and are still existing in the system. For your

convenience, assume that at most $10$ child processes will exist at the same time.

Action for $"4.$ Quit": terminate the program. You need to terminate ALL created and existing child

processes before terminating the main program.