theozanchi / 42_Berlin_minishell

Minitalk

This project is about creating our own Shell with basic functions. It is a group project done with Jakob Schott

The full subject can be found here.

Downloading and compiling the project

Clone the library and use make to compile

git clone https://github.com/theozanchi/42_Berlin_minishell/tree/main
cd 42_Berlin_minishell
make

Running the program

The program is launched without any argument and can be used like any other shell:

Supported features

• Functioning work history, saved under the home folder of the user (.minishell_history)
• Piped commands |
• Redirections <, >, << and >>
• Signals SIGINT and SIGQUIT (same behaviour as bash)
• Some commands are implememted as built-in commands:
  • echo with option -n
  • cd with only a relative or absolute path
  • pwd with no options
  • export with no options
  • unset with no options
  • env with no options or arguments
  • exit with no options

Some examples

Structure of the code

1. sources/1_lexer: tokenizes the user input (collected through readline) and performs a first lexical analysis
2. sources/2_parser: loads the user input into the main data structure and aggregates it as a char**
3. sources/3_executer: creates pipes and child processes to execute the command. Built-ins are executed in the main process whereas other commands are executed in a dedicated child process