SIMPLE SHELL

Betty

• Write a beautiful code that passes the Betty checks

Simple shell0.1

• Write a UNIX command line interpreter.
  • Usage: simple_shell
• Your Shell should:
  • Display a prompt and wait for the user to type a command. A command line always ends with a new line.
  • The prompt is displayed again each time a command has been executed.
  • The command lines are simple, no semicolons, no pipes, no redirections or any other advanced features.
  • The command lines are made only of one word. No arguments will be passed to programs.
  • If an executable cannot be found, print an error message and display the prompt again.
  • Handle errors.
  • You have to handle the “end of file” condition (Ctrl+D)
• You don’t have to:
  • use the PATH
  • implement built-ins
  • handle special characters : ", ', `, , *, &, #
  • be able to move the cursor
  • handle commands with arguments
• execve will be the core part of your Shell, don’t forget to pass the environ to it…