/42sh

Primary LanguageC

42sh

Objectif

  • Write a UNIX bash-like shell

Downloading

You can clone by copy-paste this command :

$> git clone https://github.com/GrandChaman/42sh.git

Compilation

Run makecommand

Utilisation

/!\ Remember: The project was mainly developed in/for a macOS Sierra environment (10.12.16). The project may not behave as desired under another operating system. /!\

Once the 42h project is compiled you can run it using the ./42sh command.

Features

/!\ PRECISION: Official POSIX documentation link: http://pubs.opengroup.org/onlinepubs/9699919799/) /!\

  • Editing the command line using the termcaps library.

  • The features of the ctrl + D and ctrl + C key combinations in line editing and process execution.

  • Command separator ;

  • Pipe |

  • The logical operators && and ||.

  • Execution of simple commands with their parameters and PATH management.

  • Jobs Control with jobs, fg, bg command and &

  • Simple scripting shell with bash syntax. Execute your script like ./42sh test.sh

    • while, do, if, elif, fi, done
    • Increment your variable like x=$(($x + 1))

  • Error and command return value management with echo $? command.

  • Advanced redirections: file output aggregation and heredoc <<

    • The four redirections <, >, << (heredoc) and >>.
    • File descriptor aggregations, for example to close the error output (>& and <&).

  • Use the up and down arrows to navigate through the command history, line editing possible.

  • Cut, copy and/or paste all or part of a line with the following key sequences:

    • `shift + LEFT/RIGHT Select text.
    • alt + C Copy the selected text.
    • alt + V Paste the selected text.
    • alt + X Cut selected text.

  • Move left and right by "word" with ctrl + LEFT and ctrl + RIGHT.

  • Go directly to the beginning and end of a line with the home and end keys.

  • Write and edit a command on several lines. In this case, alt + UP and alt + DOWN allow you to go from one row to another of the command while remaining on the same column or the column.

  • Complete management of quotas and double quotas, even on several lines (excluding expansions).

  • Auto-completion with tab key

  • Local variable management with set and unset builtins

  • Implementation of the following builtins respecting the standards dictated by POSIX:

    • cd
    • echo
    • exit
    • env
    • setenv (export equivalent under bash)
    • set
    • unsetenv
    • unset

  • Order history and builtins history and ! with all their options.

Authors

Frederic Bertoria - https://github.com/fbertoia

Francis Le-Roy - https://github.com/GrandChaman

Hugo Fontaine - https://github.com/Usiten

Romain Fautier - https://github.com/rfautier