This project has been created as part of the 42 curriculum by nclavel, thlibers

STILL IN BUILD

Description:

Minishell is a shell coded in C. To do this project we have reused the project called pipex done earlier on the 42 curriculum.

A shell is a CommandLine user Interface (CLI) that bridges between the user and the system by interpreting the command typed by the user in his terminal. A lot of different shells are available, like sh, bash, zsh, fish and many more.

This project deepened our understanding of how UNIX systems work and how a program can parse and process a command string to execute what the user wants to do.

Instruction:

1. Build the project using make

make
# OR 
make minishell

2. Launch the shell

./minishell

• Remove every compilation object file

make clean

• Remove every compilation object file and remove the compiled file

make fclean

• Remove every compilation object file, remove the compiled file and rebuild the project

make re

Available features:

• Use minishell on a non tty mode (partial support)
• Fully fonctional piping system
• Fully functional history
• Fully fonctional builtin
• Complete expand token
• File redirection
• Heredoc support
• Condition priority
• Wildcard expand

Technical choice

A lexer (also called a tokenizer) reads raw text one character at a time and splits it into meaningful pieces called tokens. After the user types a command line, the lexer processes that input and produces tokens labeled with their exact types (see the list of operators in the "Available features" section) .

An Abstract Syntax Tree (AST) is a tree-shaped data structure used to represent commands for execution. It has a top node called a root, intermediate nodes called branches (subnodes), and leaf nodes where data are stored.

Example:

Ressources used:

• Bash documentation
• Readline documentation
• Function manual provided by linux
• Tokenize a string
• AST wikipedia
• Lexer analysis wikipedia
• Piping in UNIX/Linux

Made with ❤️ by thlibers nclavel