minishell.42

bash manual

Overview

Minishell is a simple shell implementation written in the C programming language. It aims to replicate some of the basic functionalities of popular shells like Bash.

Key Features

The key features of this minishell include:

• Displaying a prompt when waiting for a new command.
• Implementing a working history feature.
• Searching and launching the right executable based on the PATH variable or using a relative or absolute path.
• Handling various redirections, including <, >, <<, and >>.
• Supporting pipes (|) to connect the output of one command to the input of the next.
• Handling environment variables (e.g., $VAR) and expanding them to their values.
• Handling special characters like quotes (' and ") to prevent interpretation of meta-characters.
• Implementing built-in commands like echo, cd, pwd, export, unset, env, and exit.

Project Structure

• Executor: Contains code for command execution.

  • Built_cmd.c: Handles built-in commands.
  • Err.c: Error handling.
  • echo.c: Implementation of the 'echo' command.
  • exuc.c: Execution functions.
  • pipe.c: Handling pipes in command execution.
  • rd_from_wr_in.c: Reading from write end of a pipe.
  • sig.c: Signal handling.
  • stat_loc.c: Handling the status of executed processes.
  • terminate.c: Termination functions.

• Include: Stores header files for declarations.

  • Exec.h: Declarations for execution-related functions.
  • Parser.h: Declarations for parsing functions.
  • Subsystem.h: Declarations for subsystem-related functions.
  • minishell.h: Main header for the minishell program.

• Makefile: Makefile for building the project.

• Parser: Handles parsing of input commands.

  • Lists:
    • list_env.c: List-related functions for environment variables.
    • list_tokens.c: List-related functions for tokens.
  • Tockenization_files:
    • expand.c: Token expansion functions.
    • expand_heredoc.c: Heredoc token expansion.
    • repair_line.c: Line repair functions.
    • tokenize_line.c: Tokenization functions.
  • ast.c: Abstract Syntax Tree (AST) generation.
  • call_shell.c: Function for calling the shell.
  • check_syntax_errors:
    • check.c: Syntax checking functions.
    • check_utils.c: Utility functions for syntax checking.
  • herdoc:
    • ft_herdoc.c: Functions for handling heredoc.
    • heredoc_utils.c: Utility functions for heredoc handling.
  • pop_spcs.c: Function for popping spaces in parsed tokens.

• Subsystems: Contains code for various subsystems or components.

  • b_expr.c: Binary expression subsystem.
  • env.c: Environment variable subsystem.
  • env1.c: More environment variable functions.
  • exp.c: Expression evaluation subsystem.
  • unset.c: Functions for unsetting variables.

• libft: Likely a custom library for general-purpose functions.

  • (List of library source files and headers.)
  • libft source on github

• main: Main entry point of the minishell program.