This project explores process control and environment variables in C by building a basic command-line shell. The shell can execute built-in commands like cd and exit, as well as external programs such as ls and pwd.
Memory Management: Employs dynamic memory allocation to store user input and parsed command structures, ensuring efficient resource usage. Command Parsing: Accurately interprets user input, separating commands and arguments for proper execution. Process Control: Seamlessly handles both built-in and external commands using fork, exec, and wait system calls, demonstrating a deep understanding of process management. Environment Variable Access: Leverages getenv to retrieve the system's PATH variable, enabling the shell to locate and execute programs within specified directories. Code Style and Readability: Adheres to consistent formatting and meaningful variable names, prioritizing code clarity and maintainability.
Compile the code using make. Run the shell by executing ./project. Enter commands as you would in a standard shell. Supported commands: cd: Change directories exit: Terminate the shell External programs (e.g., ls, pwd, echo)
Use the provided test cases: ./project < test_data/case{0,1,2,3}/input Compare output with expected results in test_data/case{0,1,2,3}/output Run all tests automatically: make followed by ./run_tests.sh