https://github.com/lucienfer/minishell-42
This is my final 42's project Minishell, I implemented my own shell in C, which supports redirections, pipes, environment variables and several builtins
https://github.com/lucienfer/minishell-42
42 c minishell42 shell
Last synced: about 2 months ago
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This is my final 42's project Minishell, I implemented my own shell in C, which supports redirections, pipes, environment variables and several builtins
- Host: GitHub
- URL: https://github.com/lucienfer/minishell-42
- Owner: lucienfer
- Created: 2023-08-06T05:33:04.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2023-08-06T05:43:39.000Z (almost 3 years ago)
- Last Synced: 2025-04-06T14:48:32.801Z (about 1 year ago)
- Topics: 42, c, minishell42, shell
- Language: C
- Homepage:
- Size: 44.9 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Minishell-42
About |
Links |
Functions |
Starting
## About ##
- Minishell is a project at school 42 and the instructions were given in the [subject](https://github.com/anolivei/Minishell42/blob/main/subject.pdf).
- The objective of this project is to create a simple shell to learn a lot about processes and file descriptors.
- The existence of shells is linked to the very existence of IT. At the time, all coders agreed that communicating with a computer using aligned 1/0 switches was seriously irritating. It was only logical that they came up with the idea to communicate with
a computer using interactive lines of commands in a language somewhat close to english.
With Minishell, you’ll be able to travel through time and come back to problems people faced when Windows didn’t exist.
## Links ##
- [Notion](https://www.notion.so/Minishell-Materials-7bbd45a806e04395ab578ca3f805806c)
- [Linux Commands](https://www.rapidtables.com/code/linux/index.html)
- [Unix Processes in C](https://www.youtube.com/watch?v=cex9XrZCU14&list=PLfqABt5AS4FkW5mOn2Tn9ZZLLDwA3kZUY&index=1)
- [Writing a Unix Shell - Part I](https://indradhanush.github.io/blog/writing-a-unix-shell-part-1/)
- [Writing a Unix Shell - Part II](https://indradhanush.github.io/blog/writing-a-unix-shell-part-2/)
- [Writing a Unix Shell - Part III](https://indradhanush.github.io/blog/writing-a-unix-shell-part-3/)
- [Bash Guide for Beginners](https://tldp.org/LDP/Bash-Beginners-Guide/html/index.html)
- [Advanced Bash-Scripting Guide](https://tldp.org/LDP/abs/html/index.html)
- [To Understand Pipe](https://www.youtube.com/watch?v=uHH7nHkgZ4w)
- [To Understand Dup](https://www.youtube.com/watch?v=EqndHT606Tw)
- [Pipe and Dup](https://www.youtube.com/watch?v=fOaK6oRqhEo)
## Functions ##
Only the following functions are allowed to be used in this project:
| Function | Description | Function | Description |
|----------|-------------|----------|-------------|
|readline | read a line from the terminal |lstat | get file status |
|rl_clear_history | clear the history list by deleting all of the entries | fstat | get file status by fd |
|rl_on_new_line | tell the update routines that we have moved onto a new line | unlink | remove a specified file |
|rl_replace_line | replace the contents of rl_line_buffer with text | execve | execute program |
|rl_redisplay | change what's displayed on the screen | dup | duplicate a file descriptor |
|add_history | save the line in a history list of lines | dup2 | duplicate a file descriptor |
|printf | format and print data | pipe | create pipe |
|malloc | allocate dynamic memory | opendir | open a directory |
|free | free dynamic memory | readdir | read a directory |
|write | write to a file descriptor | closedir | close a directory |
|access | check user's permissions for a file | strerror | return string describing error number |
|open | open and can create a file | perror | print a system error message |
|read | read from a file descriptor | isatty | test whether a file descriptor refers to a terminal |
|close | close a file descriptor | ttyname | return name of a terminal |
|fork | create a child process | ttyslot | find the slot of the current user's terminal in some file |
|wait | wait for process to change state | ioctl | control device |
|waitpid | wait for process to change state | getenv | get an environment variable |
|wait3 | wait for process to change state | tcsetattr | control asynchronous communications ports |
|wait4 | wait for process to change state | tcgetattr | control asynchronous communications ports |
|signal | ANSI C signal handling | tgetent | termcap database emulation |
|sigaction | examine and change a signal action | tgetflag | termcap database emulation |
|kill | send signal to a process | tgetnum | termcap database emulation |
|exit | cause normal process termination | tgetstr | termcap database emulation |
|getcwd | get current working directory | tgoto | termcap database emulation |
|chdir | change working directory | tputs | curses interfaces to terminfo database |
|stat | get file status by pathname |
## Starting ##
```bash
# Clone this project
$ git clone https://github.com/lucienfer/Minishell-42
# Access
$ cd Minishell42
# Install the readline lib
$ sudo apt-get install libreadline6-dev
# Compile the project
$ make
# Run the project
$ ./minishell
```
