Custom Command Line Interface

Overview

This custom-built Command Line Interface (CLI) tool is designed for Linux systems. It provides a set of useful commands to perform common file operations, email handling, and more. The CLI is lightweight, efficient, and easy to use, providing functionalities that simplify file management, email communication, and data manipulation directly from the terminal.

Features

The following commands are available in this CLI tool:

• list: List the contents of a directory.
• change_dir: Change the directory
• make_dir: Create a new directory.
• remove_dir: Remove an existing directory.
• date: Display the current system date and time.
• display: Display the contents of a file.
• cut_paste: Move a file from one location to another.
• copy_paste: Copy a file from one location to another.
• send-email: Send an email via the terminal.
• convert: Convert files into different formats.

How to run

• To compile the code run make
• To run the shell run make run

Commands

Internal Commands

working_dir

• -L Display the logical current working directory
• -P Display the physical current working directory
• Warnings Command-line option not recognized

echo

• -n do not output the trailing newline
• -E disable interpretation of backslash escapes
• Assumption For this the command line option at the very end will be considered

change_dir

• -L Handle the operand dot-dot logically
• -P Handle the operand dot-dot physically

External Commands

list

• -a do not ignore entries starting with .
• -A do not list implied . and ..
• Warnings No such file or directory

date

• no argument shows local date and time
• -u shows the GMT time
• -R output date and time in RFC 5322 format

remove_dir

• -f ignore nonexistent files and arguments, never prompt
• -i prompt before every removal
• Warnings Missing operands File doesn't exist

display

• -E display $ at end of each line
• -n number all output lines
• Warning File name not entered File doesn't exist

make_dir

• -v print a message for each created directory
• -p no error if existing, make parent directories as needed
• Warning Directory name not entered Unable to create the directory

New Commands

copy_paste

• Prompts the user to enter the source file path & Destination directory
• Displays an error if the source file does not exist or cannot be opened.Also, handle cases where the destination directory is invalid.
• Confirms successful file copy with the source and destination paths.

cut_paste

• Prompts the user to enter the source file path & Destination directory
• Displays an error if the source file does not exist or cannot be opened. Also, handle cases where the destination directory is invalid.
• Confirms successful file move with the source and destination paths.

send-email

• Enables users to send emails directly from the command-line interface using Python-C integration, streamlining communication within the terminal environment.
• Allows users to specify sender email, recipient email, subject, and message body as command-line inputs, ensuring flexibility and ease of use.
• Includes robust error handling to validate email addresses and provides user feedback on successful or failed email transmissions.

convert

• Allows users to convert files between different formats: plain text to binary, binary to plain text, plain text to hexadecimal, and plain text to Base64.
• Each conversion mode processes the file content line by line or byte by byte, making it suitable for files of various sizes.
• The program checks for errors in file opening (e.g., missing files or permissions) and ensures appropriate messages are displayed to guide the user.
• Confirms successful conversion of the file.