Build the Shell Loop (REPL - Read, Eval, Print Loop)

[Amid68]

This is the core structure that will read user input, interpret commands, and execute them.

• 3.1 Shell prompt:

  • Create a simple, customizable prompt ($ or custom string like mysh$).

• 3.2 Read user input:

  • Use functions like getline() to capture input from the user.
  • Add input sanitization (strip unnecessary spaces, handle empty input).

• 3.3 Parse the input:

  • Split the input string into command and arguments (using strtok() or strsep()).
  • Store the command and its arguments in a data structure (like an array of strings).

• 3.4 Command execution:

  • Use fork() to create a child process.
  • In the child process, use execvp() to execute the parsed command.
  • In the parent process, use waitpid() to wait for the child to finish executing.

• 3.5 Exit functionality:

  • Add functionality for the exit command to quit the shell.

[Amid68]

I've completed the initial REPL implementation. Next, I'll refactor the code into multiple files and add more error handling.