minishell

Description

A Shell provides you with an interface to the Unix system. It gathers input from you and executes programs based on that input. When a program finishes executing, it displays that program's output.

Shell is an environment in which we can run our commands, programs, and shell scripts. There are different flavors of a shell, just as there are different flavors of operating systems. Each flavor of shell has its own set of recognized commands and functions.

And minishell is my interpretation of the legendary shell.

Features

Basics:

• Search and launch the right executable (based on the PATH variable, using a relative or an absolute path)
• Environment variables ($ followed by a sequence of characters) expand to their values
• ’ (single quotes - prevent from interpreting meta-characters in quoted sequence)
• " (double quotes - prevent from interpreting meta-characters in quoted sequence except for $)
• | connect cmds or groups with pipes; output of a cmd is connected to the input of the next cmd via a pipe

Redirections:

• < file Redirecting Input
• <<limiter Here Documents
• > file Redirecting Output
• >> file Appending Redirected Output

Builtins:

• echo with option -n
• cd with relative/absolute path
• pwd without options
• env without options
• unset [env] without options
• exit [exit_status] without options

Usage

Installation Instructions

1. Cloning this repository

   git clone --recurse-submodules https://github.com/Kllaster/minishell.git
   

2. cd into the root directory

   cd minishell
   

3. Creating a program from source code

   make
   

One-line installation

git clone --recurse-submodules https://github.com/Kllaster/minishell.git\
&& cd minishell\
&& make

Running the program

./minishell