Process creation (fork and exec) in Operating Systems - Mini Project: Build & Apply

Understanding Process Creation with fork() and exec()

📖 Scenario: You are learning how operating systems create new processes. This is important for running programs and managing tasks on your computer.In this project, you will simulate the steps an operating system takes to create a new process using fork() and exec() system calls.

🎯 Goal: Build a simple step-by-step representation of process creation using fork() to duplicate a process and exec() to replace the process image with a new program.

📋 What You'll Learn

Create a variable to represent the original process ID

Create a variable to represent the child process ID after fork

Simulate the fork operation by assigning the child process ID

Simulate the exec operation by changing the program name in the child process

💡 Why This Matters

🌍 Real World

Operating systems use fork() and exec() to run new programs and manage multiple tasks at the same time.

💼 Career

Understanding process creation is essential for system administrators, software developers, and anyone working with operating systems or server management.

1

Create the original process ID

Create a variable called original_pid and set it to the integer 1000 to represent the original process ID.

Operating Systems

# Create a variable called original_pid and set it to 1000
# Your code here

Need a hint?

The process ID is usually a number. Just assign 1000 to original_pid.

2

Simulate the fork operation

Create a variable called child_pid and set it to original_pid + 1 to simulate the new child process ID created by fork().

Operating Systems

original_pid = 1000
# Create a variable called child_pid and set it to original_pid + 1
# Your code here

Need a hint?

fork() creates a new process with a new ID. Add 1 to original_pid to get child_pid.

3

Set the original program name

Create a variable called program_name and set it to the string "original_program" to represent the program running in the original process.

Operating Systems

original_pid = 1000
child_pid = original_pid + 1
# Create a variable called program_name and set it to "original_program"
# Your code here

Need a hint?

The original process runs a program named "original_program". Assign this string to program_name.

4

Simulate exec to run a new program in the child process

Create a variable called child_program_name and set it to the string "new_program" to simulate the exec() call replacing the child process's program.

Operating Systems

original_pid = 1000
child_pid = original_pid + 1
program_name = "original_program"
# Create a variable called child_program_name and set it to "new_program"
# Your code here

Need a hint?

exec() replaces the program in the child process. Assign "new_program" to child_program_name.