minishell

Write a shell.

A shell is a program which executes commands from a string given by a prompt.

First steps

The prompt

A prompt is the concept where your program waits for an input, in this case your prompt will have to wait for STDIN to have some char * input from the user on the terminal (a tty).

You can use your get_next_line and implement it to make it work as The GNU Readline Library or you can simply include this lib for Mac or use it for Linux.

How to include The GNU Readline Library

You could simply download the readline-master.tar.gz, compile it and link it to your binary. But this is not the correct way to do it. Your project should only contain code made by your self not third-party code. Given that principle, we'll make our project download it, descompress it, compile it and link it as following.

$(READLINE_LIB): | $(READLINE_DIR)
	printf "$(BLUE)Compiling and linking library...$(DEF_COLOR)\n"
	$(MAKE) -s --no-print-directory -C $(READLINE_DIR) >>$(LOG) 2>&1
	printf "$(GREEN)\r\033[2K[✓] $(PINK)readline$(GREEN) created!!!$(DEF_COLOR)\n\n"

$(READLINE_DIR):
	printf "$(CYAN)Downloading: $(PINK)readline...$(DEF_COLOR)\n"
	cd lib; curl -s -O http://git.savannah.gnu.org/cgit/readline.git/snapshot/readline-master.tar.gz
	rm -rf $(READLINE_DIR)
	mkdir -p $(READLINE_DIR)
	tar -xpf lib/readline-master.tar.gz -C $(READLINE_DIR) --strip-components 1
	rm -rf lib/readline-master.tar.gz
	printf "$(CYAN)Configuring: $(PINK)readline...$(DEF_COLOR)\n"
	cd $(READLINE_DIR); bash ./configure >>$(LOG) 2>&1

Signals

Main actions

1. check syntax -> lexer
2. tokenize -> tokenizer
3. expanse args and redirections -> expansor
4. execute -> executor

Testing

Norme testing

norminette src inc lib/libft

Some random test

make test

Mpanic test

make mpanic