42.Minishell

About

Instructions

• You must program a mini UNIX command interpreter.
• This interpreter must display a prompt (a simple $> for example) and wait till you type a command line, validated by pressing enter.
• The prompt is shown again only once the command has been completely executed.
• The command lines are simple, no pipes, no redirections or any other advanced functions.
• The executable are those you can find in the paths indicated in the PATH variable.
• In cases where the executable cannot be found, it has to show an error message and display the prompt again.
• You must manage the errors without using errno, by displaying a message adapted to the error output.
• You must deal correctly with the PATH and the environment (copy of system char **environ).
• You must implement a series of builtins:
  • exit
  • echo
  • cd
  • env
    • setenv
    • unsetenv
• You can choose as a reference whatever shell you prefer.
• You must manage expansions $ and ~

Allowed Functions

• malloc, free
• access
• open, close, read, write
• opendir, readdir, closedir
• getcwd, chdir
• stat, lstat, fstat
• fork, execve
• wait, waitpid, wait3, wait4
• signal, kill
• exit

Project Structure

Source files

src/
├── builtins
│   ├── builtins.c
│   ├── cmd
│   │   ├── baguette.c
│   │   ├── cd.c
│   │   ├── echo.c
│   │   ├── env.c
│   │   ├── exit.c
│   │   ├── help.c
│   │   ├── konami.c
│   │   └── setenv.c
│   └── get_total.c
├── main.c
├── main.o
├── minishell.c
└── utils
    └── ft_error.c

3 directories, 14 files

Header files

includes/
├── builtins.h
├── minishell.h
└── utils.h

0 directories, 3 filess

Sources

• Write a Shell in C - Brennan.io