Minishell

Group project with @LanaLebedeva

Summary

The objective of this project is for us to create a simple shell. Yes, our little bash or zsh. We will learn a lot about processes and file descriptors.

Task

• Not interpret unclosed quotes or unspecified special characters like \ or;
• Not use more than one global variable, think about it and be ready to explain why you do it.
• Show a prompt when waiting for a new command.
• Have a working History.
• Search and launch the right executable (based on the PATH variable or by using relative or absolute path)
• It must implement the builtins:
  • echo with option -n
  • cd with only a relative or absolute path
  • pwd with no options
  • export with no options
  • unset with no options
  • env with no options or arguments
  • exit with no options
• ’ inhibit all interpretation of a sequence of characters.
• " inhibit all interpretation of a sequence of characters except for $.
• Redirections:
  • < should redirect input.
  • > should redirect output.
  • “<<” read input from the current source until a line containing only the de- limiter is seen. it doesn’t need to update history!
  • “>>” should redirect output with append mode.
• Pipes | The output of each command in the pipeline is connected via a pipe to the input of the next command.
• Environment variables ($ followed by characters) should expand to their values.
• $? should expands to the exit status of the most recently executed foreground pipeline.
• ctrl-C ctrl-D ctrl-\ should work like in bash.

How to compile

cd minishell
make
./minishell

42 école project.