Lexxyla / simple_shell

A simple UNIX command interpreter making as a final project of the low-level programming and algorithm quarter at ALX school of software engineering by Ella and Alexxy

Ella and Alexxy Shell

Description

Ella and Alexxy Shell is a simple UNIX command interpreter that replicates functionalities of the simple shell (sh). Additional functions are also included. This program was written entirely in C as a milestone project for ALX Africa Software Engineering.

Installation

Clone this repository into your working directory. For best results, files should be compiled with GCC and the following flags: -Wall -Wextra -Werror -pedantic -std=gnu89

Usage

After compilation, the resulting program can run stand-alone, either in interactive or non-interactive mode.

Interactive Mode

In interactive mode, simply run the program and wait for the prompt to appear. From there, you can type commands freely, exiting with either the "exit" command or ctrl-D.

Non-Interactive Mode

In non-interactive mode, echo your desired command and pipe it into the program like this:

echo "ls" | ./shell

In non-interactive mode, the program will exit after finishing your desired command(s).

Included Built-Ins

Our shell has support for the following built-in commands:

Command	Definition
exit [n]	Exit the shell, with an optional exit status, n.
env	Print the environment.
setenv [var][value]	Set an environment variable and value. If the variable exists, the value will be updated.
unsetenv [var]	Remove an environment variable.
cd [dir]	Change the directory.
help [built-in]	Read documentation for a built-in.

Credits

All code written by Ella and Alexxy.