From 9718530c9f2df4c763c04bfac9e9de96153daa9e Mon Sep 17 00:00:00 2001
From: Prozilla <business@prozilla.dev>
Date: Mon, 11 Dec 2023 16:51:40 +0100
Subject: [PATCH] Updated terminal app

---
 .../applications/terminal/Terminal.jsx        |  37 ++++-
 src/features/applications/terminal/command.js |  52 ++++---
 .../applications/terminal/commands.js         |  20 ++-
 .../applications/terminal/commands/blow.js    |   7 +-
 .../applications/terminal/commands/cat.js     |  15 +-
 .../applications/terminal/commands/cd.js      |  29 ++--
 .../applications/terminal/commands/clear.js   |  21 ++-
 .../applications/terminal/commands/compgen.js |  10 ++
 .../applications/terminal/commands/cowsay.js  | 143 +++++++++---------
 .../applications/terminal/commands/exit.js    |   6 +
 .../applications/terminal/commands/ls.js      |   4 +-
 .../applications/terminal/commands/make.js    |   9 +-
 .../applications/terminal/commands/man.js     |  37 ++++-
 .../applications/terminal/commands/nice.js    |   9 +-
 .../applications/terminal/commands/rm.js      |   2 +-
 .../applications/terminal/commands/rmdir.js   |   2 +-
 .../applications/terminal/commands/touch.js   |   6 +-
 .../applications/terminal/commands/whatis.js  |  17 +++
 .../applications/terminal/commands/whoami.js  |   5 +
 .../applications/terminal/commands/world.js   |   7 +-
 20 files changed, 294 insertions(+), 144 deletions(-)
 create mode 100644 src/features/applications/terminal/commands/compgen.js
 create mode 100644 src/features/applications/terminal/commands/exit.js
 create mode 100644 src/features/applications/terminal/commands/whatis.js
 create mode 100644 src/features/applications/terminal/commands/whoami.js

diff --git a/src/components/applications/terminal/Terminal.jsx b/src/components/applications/terminal/Terminal.jsx
index a585459..96936e4 100644
--- a/src/components/applications/terminal/Terminal.jsx
+++ b/src/components/applications/terminal/Terminal.jsx
@@ -6,8 +6,9 @@ import { OutputLine } from "./OutputLine.jsx";
 import { InputLine } from "./InputLine.jsx";
 import { HOSTNAME, USERNAME } from "../../../constants/applications/terminal.js";
 import CommandsManager from "../../../features/applications/terminal/commands.js";
+import { removeFromArray } from "../../../features/utils/array.js";
 
-export function Terminal({ setTitle }) {
+export function Terminal({ setTitle, close: exit }) {
 	const [inputKey, setInputKey] = useState(0);
 	const [inputValue, setInputValue] = useState("");
 	const [history, setHistory] = useState([]);
@@ -43,22 +44,46 @@ export function Terminal({ setTitle }) {
 		if (value === "")
 			return;
 
-		const args = value.split(/ +/);
+		// Get arguments
+		const args = value.match(/(?:[^\s"]+|"[^"]*")+/g);
 
 		if (args[0].toLowerCase() === "sudo" && args.length > 1) {
 			args.shift();
 		}
 
+		// Get command
 		const commandName = args.shift().toLowerCase();
-
 		const command = CommandsManager.find(commandName);
 
 		if (!command)
 			return `${commandName}: Command not found`;
 
+		// Get options
+		const options = [];
+		args.filter((arg) => arg.startsWith("-")).forEach((option) => {
+			if (option.startsWith("--")) {
+				const longOption = option.substring(2).toLowerCase();
+				if (!options.includes(longOption))
+					options.push(longOption);
+			} else {
+				const shortOptions = option.substring(1).split("");
+				shortOptions.forEach((shortOption) => {
+					if (!options.includes(shortOption))
+						options.push(shortOption);
+				});
+			}
+			
+			removeFromArray(option, args);
+		});
+
+		// Check usage
 		if (command.requireArgs && args.length === 0)
-			return `${commandName}: Incorrect syntax: ${commandName} requires at least 1 argument`;
+			return `${commandName}: Incorrect usage: ${commandName} requires at least 1 argument`;
+
+		if (command.requireOptions && options.length === 0)
+			return `${commandName}: Incorrect usage: ${commandName} requires at least 1 option`;
 		
+		// Execute command
 		let response = null;
 
 		try {
@@ -70,7 +95,9 @@ export function Terminal({ setTitle }) {
 				setCurrentDirectory,
 				username: USERNAME,
 				hostname: HOSTNAME,
-				rawInputValue
+				rawInputValue,
+				options,
+				exit
 			});
 
 			if (response == null)
diff --git a/src/features/applications/terminal/command.js b/src/features/applications/terminal/command.js
index 31fa674..b740718 100644
--- a/src/features/applications/terminal/command.js
+++ b/src/features/applications/terminal/command.js
@@ -1,28 +1,33 @@
 import { VirtualFolder } from "../../virtual-drive/virtualFolder.js";
 import { VirtualRoot } from "../../virtual-drive/virtualRoot.js";
 
+/**
+ * @callback executeType
+ * @param {string[]} args 
+ * @param {object} options
+ * @param {Function} options.promptOutput
+ * @param {Function} options.pushHistory 
+ * @param {VirtualRoot} options.virtualRoot 
+ * @param {VirtualFolder} options.currentDirectory 
+ * @param {Function} options.setCurrentDirectory 
+ * @param {string} options.username 
+ * @param {string} options.hostname 
+ * @param {string} options.rawInputValue 
+ * @param {string[]} options.options 
+ * @param {Function} options.exit
+ * @returns {string|{ blank: boolean }}
+ */
+
 export default class Command {
 	/** @type {string} */
 	name;
 
-	/**
-	 * @param {string[]} args 
-	 * @param {object} options
-	 * @param {Function} options.promptOutput
-	 * @param {Function} options.pushHistory 
-	 * @param {VirtualRoot} options.virtualRoot 
-	 * @param {VirtualFolder} options.currentDirectory 
-	 * @param {Function} options.setCurrentDirectory 
-	 * @param {string} options.username 
-	 * @param {string} options.hostname 
-	 * @param {string} options.rawInputValue 
-	 * @returns {string|{ blank: boolean }}
-	 */
-	execute = (args, options) => {};
+	/** @type {executeType} */
+	execute = () => {};
 
 	/**
 	 * @param {string} name 
-	 * @param {Function} execute 
+	 * @param {executeType} execute 
 	 */
 	constructor(name, execute) {
 		this.name = name;
@@ -39,7 +44,7 @@ export default class Command {
 	}
 
 	/**
-	 * @param {Function} execute 
+	 * @param {executeType} execute 
 	 * @returns {Command}
 	 */
 	setExecute(execute) {
@@ -57,11 +62,20 @@ export default class Command {
 	}
 
 	/**
-	 * @param {{ purpose: string, usage: string, description: string}} name 
+	 * @param {boolean} value 
 	 * @returns {Command}
 	 */
-	setManual({ purpose, usage, description }) {
-		this.manual = { purpose, usage, description };
+	setRequireOptions(value) {
+		this.requireOptions = value;
+		return this;
+	}
+
+	/**
+	 * @param {{ purpose: string, usage: string, description: string, options: object }} manual 
+	 * @returns {Command}
+	 */
+	setManual({ purpose, usage, description, options }) {
+		this.manual = { purpose, usage, description, options };
 		return this;
 	}
 }
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands.js b/src/features/applications/terminal/commands.js
index 012b769..af80c53 100644
--- a/src/features/applications/terminal/commands.js
+++ b/src/features/applications/terminal/commands.js
@@ -1,10 +1,13 @@
+import Command from "./command.js";
 import { blow } from "./commands/blow.js";
 import { cat } from "./commands/cat.js";
 import { cd } from "./commands/cd.js";
 import { clear } from "./commands/clear.js";
+import { compgen } from "./commands/compgen.js";
 import { cowsay } from "./commands/cowsay.js";
 import { dir } from "./commands/dir.js";
 import { echo } from "./commands/echo.js";
+import { exit } from "./commands/exit.js";
 import { fortune } from "./commands/fortune.js";
 import { hostname } from "./commands/hostname.js";
 import { ls } from "./commands/ls.js";
@@ -18,12 +21,14 @@ import { reboot } from "./commands/reboot.js";
 import { rm } from "./commands/rm.js";
 import { rmdir } from "./commands/rmdir.js";
 import { touch } from "./commands/touch.js";
+import { whatis } from "./commands/whatis.js";
+import { whoami } from "./commands/whoami.js";
 import { world } from "./commands/world.js";
 
 export default class CommandsManager {
 	/**
 	 * @param {string} name 
-	 * @returns {CommandsManager}
+	 * @returns {Command}
 	 */
 	static find(name) {
 		let matchCommand = null;
@@ -38,6 +43,15 @@ export default class CommandsManager {
 		return matchCommand;
 	}
 
+	/**
+	 * @param {string} pattern 
+	 * @returns {Command[]}
+	 */
+	static search(pattern) {
+		const matches = this.COMMANDS.filter((command) => command.name.match(pattern));
+		return matches;
+	}
+
 	static COMMANDS = [
 		echo,
 		clear,
@@ -60,5 +74,9 @@ export default class CommandsManager {
 		cat,
 		man,
 		reboot,
+		compgen,
+		whoami,
+		whatis,
+		exit,
 	];
 }
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/blow.js b/src/features/applications/terminal/commands/blow.js
index 76aeb3c..aaa631d 100644
--- a/src/features/applications/terminal/commands/blow.js
+++ b/src/features/applications/terminal/commands/blow.js
@@ -1,5 +1,6 @@
 import Command from "../command.js";
 
-export const blow = new Command("%blow", () => {
-	return "fg: %blow: No such job";
-});
\ No newline at end of file
+export const blow = new Command("%blow")
+	.setExecute(function() {
+		return `fg: ${this.name}: No such job`;
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/cat.js b/src/features/applications/terminal/commands/cat.js
index 59f6c88..4b0f736 100644
--- a/src/features/applications/terminal/commands/cat.js
+++ b/src/features/applications/terminal/commands/cat.js
@@ -7,15 +7,20 @@ export const cat = new Command("cat")
 		usage: "cat [OPTION]... [FILE]...",
 		description: "Concetenate FILE(s) to standard output."
 	})
-	.setExecute((args, { currentDirectory }) => {
+	.setExecute(function(args, { currentDirectory, options }) {
 		const [name, extension] = args[0].split(".");
 		const file = currentDirectory.findFile(name, extension);
-	
+
 		if (!file)
-			return `rm: ${args[0]}: No such file`;
-	
+			return `${this.name}: ${args[0]}: No such file`;
+
 		if (file.content) {
-			return file.content;
+			if (!options.includes("e")) {
+				return file.content;
+			} else {
+				// Append "$" at the end of every line
+				return file.content.split("\n").join("$\n") + "$";
+			}
 		} else if (file.source) {
 			return `Src: ${file.source}`;
 		} else {
diff --git a/src/features/applications/terminal/commands/cd.js b/src/features/applications/terminal/commands/cd.js
index 8064670..86b2387 100644
--- a/src/features/applications/terminal/commands/cd.js
+++ b/src/features/applications/terminal/commands/cd.js
@@ -1,13 +1,20 @@
 import Command from "../command.js";
 
-export const cd = new Command("cd", (args, { currentDirectory, setCurrentDirectory }) => {
-	const path = args[0] ?? "~";
-	const destination = currentDirectory.navigate(path);
-
-	if (!destination)
-		return `cd: ${args[0]}: No such file or directory`;
-
-	console.log(destination);
-	setCurrentDirectory(destination);
-	return { blank: true };
-}).setRequireArgs(true);
\ No newline at end of file
+export const cd = new Command("cd")
+	.setRequireArgs(true)
+	.setManual({
+		purpose: "Change directory",
+		usage: "cd path",
+		description: "Change working directory to given path (the home directory by default)."
+	})
+	.setExecute(function(args, { currentDirectory, setCurrentDirectory }) {
+		const path = args[0] ?? "~";
+		const destination = currentDirectory.navigate(path);
+	
+		if (!destination)
+			return `${this.name}: ${args[0]}: No such file or directory`;
+	
+		console.log(destination);
+		setCurrentDirectory(destination);
+		return { blank: true };
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/clear.js b/src/features/applications/terminal/commands/clear.js
index e6c1de8..88afbad 100644
--- a/src/features/applications/terminal/commands/clear.js
+++ b/src/features/applications/terminal/commands/clear.js
@@ -1,10 +1,15 @@
 import Command from "../command.js";
 
-export const clear = new Command("clear", (args, { pushHistory }) => {
-	pushHistory({
-		clear: true,
-		isInput: false
-	});
-
-	return { blank: true };
-});
\ No newline at end of file
+export const clear = new Command("clear")
+	.setManual({
+		purpose: "Clear terminal screen",
+		usage: "clear",
+	})
+	.setExecute(function(args, { pushHistory }) {
+		pushHistory({
+			clear: true,
+			isInput: false
+		});
+	
+		return { blank: true };
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/compgen.js b/src/features/applications/terminal/commands/compgen.js
new file mode 100644
index 0000000..4cd5094
--- /dev/null
+++ b/src/features/applications/terminal/commands/compgen.js
@@ -0,0 +1,10 @@
+import Command from "../command.js";
+import CommandsManager from "../commands.js";
+
+export const compgen = new Command("compgen")
+	.setRequireOptions(true)
+	.setExecute(function(args, { options }) {
+		if (options.includes("c")) {
+			return CommandsManager.COMMANDS.map((command) => command.name).sort().join("\n");
+		}
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/cowsay.js b/src/features/applications/terminal/commands/cowsay.js
index 1f00ba9..3f71327 100644
--- a/src/features/applications/terminal/commands/cowsay.js
+++ b/src/features/applications/terminal/commands/cowsay.js
@@ -8,92 +8,99 @@ const COW = `
                 ||----w |
                 ||     ||`;
 
-export const cowsay = new Command("cowsay", (args, { rawInputValue }) => {
-	// Separate input value into lines
-	const segments = rawInputValue.split(" ");
-	const lines = [];
-	let currentLine = "";
-	let maxLineWidth = 0;
+export const cowsay = new Command("cowsay")
+	.setRequireArgs(true)
+	.setManual({
+		purpose: "Show a cow saying something",
+		usage: "cowsay text",
+		description: "Show ASCII art of a cow saying something."
+	})
+	.setExecute(function(args, { rawInputValue }) {
+		// Separate input value into lines
+		const segments = rawInputValue.split(" ");
+		const lines = [];
+		let currentLine = "";
+		let maxLineWidth = 0;
 
-	const addLine = (line) => {
-		line = line.trimEnd();
-		lines.push(line);
-		if (line.length > maxLineWidth)
-			maxLineWidth = line.length;
-	};
+		const addLine = (line) => {
+			line = line.trimEnd();
+			lines.push(line);
+			if (line.length > maxLineWidth)
+				maxLineWidth = line.length;
+		};
 
-	const nextLine = (word) => {
-		addLine(currentLine);
+		const nextLine = (word) => {
+			addLine(currentLine);
 
-		if (word) {
-			currentLine = word + " ";
-		} else {
-			currentLine = "";
-		}
-	};
+			if (word) {
+				currentLine = word + " ";
+			} else {
+				currentLine = "";
+			}
+		};
 
-	segments.forEach((segment) => {
-		// Add empty spaces preceding lines
-		if (segment === "") {
-			currentLine += " ";
-			return;
-		}
+		segments.forEach((segment) => {
+			// Add empty spaces preceding lines
+			if (segment === "") {
+				currentLine += " ";
+				return;
+			}
 
-		const words = segment.split("\n");
-		for (let i = 0; i < words.length; i++) {
-			const word = words[i];
-			
-			// Handle next lines
-			if (i > 0)
-				nextLine();
+			const words = segment.split("\n");
+			for (let i = 0; i < words.length; i++) {
+				const word = words[i];
+				
+				// Handle next lines
+				if (i > 0)
+					nextLine();
 
-			// Fit word on current line
-			if ((currentLine + word).length <= MAX_WIDTH) {
-				currentLine += word + " ";
-			} else if (word.length > MAX_WIDTH) {
-				const remainingSpaces = MAX_WIDTH - currentLine.length;
+				// Fit word on current line
+				if ((currentLine + word).length <= MAX_WIDTH) {
+					currentLine += word + " ";
+				} else if (word.length > MAX_WIDTH) {
+					const remainingSpaces = MAX_WIDTH - currentLine.length;
 
-				if (remainingSpaces >= 2) {
-					addLine(currentLine + word.substring(0, remainingSpaces - 1) + "-");
-					currentLine = word.substring(remainingSpaces - 1) + " ";
+					if (remainingSpaces >= 2) {
+						addLine(currentLine + word.substring(0, remainingSpaces - 1) + "-");
+						currentLine = word.substring(remainingSpaces - 1) + " ";
+					} else {
+						nextLine(word);
+					}
 				} else {
 					nextLine(word);
 				}
-			} else {
-				nextLine(word);
 			}
-		}
-	});
+		});
 
-	if (currentLine.length > 0)
-		addLine(currentLine);
+		if (currentLine.length > 0)
+			addLine(currentLine);
 
-	// Turn lines into speech bubble
-	const speechBubble = [` ${"_".repeat(maxLineWidth + 2)} `];
+		// Turn lines into speech bubble
+		const speechBubble = [` ${"_".repeat(maxLineWidth + 2)} `];
 
-	for (let i = 0; i < lines.length; i++) {
-		let line = lines[i];
-		const missingSpaces = maxLineWidth - line.length;
+		for (let i = 0; i < lines.length; i++) {
+			let line = lines[i];
+			const missingSpaces = maxLineWidth - line.length;
 
-		if (missingSpaces > 0)
-			line += " ".repeat(missingSpaces);
+			if (missingSpaces > 0)
+				line += " ".repeat(missingSpaces);
 
-		if (lines.length > 1) {
-			if (i === 0) {
-				line = `/ ${line} \\`;
-			} else if (i === lines.length - 1) {
-				line = `\\ ${line} /`;
+			if (lines.length > 1) {
+				if (i === 0) {
+					line = `/ ${line} \\`;
+				} else if (i === lines.length - 1) {
+					line = `\\ ${line} /`;
+				} else {
+					line = `| ${line} |`;
+				}
 			} else {
-				line = `| ${line} |`;
+				line = `< ${line} >`;
 			}
-		} else {
-			line = `< ${line} >`;
+
+			speechBubble.push(line);
 		}
 
-		speechBubble.push(line);
-	}
+		speechBubble.push(` ${"-".repeat(maxLineWidth + 2)} `);
 
-	speechBubble.push(` ${"-".repeat(maxLineWidth + 2)} `);
-
-	return speechBubble.join("\n") + COW;
-}).setRequireArgs(true);
\ No newline at end of file
+		return speechBubble.join("\n") + COW;
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/exit.js b/src/features/applications/terminal/commands/exit.js
new file mode 100644
index 0000000..4317c03
--- /dev/null
+++ b/src/features/applications/terminal/commands/exit.js
@@ -0,0 +1,6 @@
+import Command from "../command.js";
+
+export const exit = new Command("exit", (args, { exit }) => {
+	exit();
+	return { blank: true };
+});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/ls.js b/src/features/applications/terminal/commands/ls.js
index cf03910..adb65fa 100644
--- a/src/features/applications/terminal/commands/ls.js
+++ b/src/features/applications/terminal/commands/ls.js
@@ -7,7 +7,7 @@ export const ls = new Command("ls")
 		description: "List information about the FILEs (the current directory by default).\n"
 			+ "Sort entries alphabetically if none of -cftuvSUX nor --sort is specified."
 	})
-	.setExecute((args, { currentDirectory }) => {
+	.setExecute(function(args, { currentDirectory }) {
 		let directory = currentDirectory;
 	
 		if (args.length > 0) {
@@ -15,7 +15,7 @@ export const ls = new Command("ls")
 		}
 	
 		if (!directory)
-			return `ls: Cannot access '${args[0]}': No such file or directory`;
+			return `${this.name}: Cannot access '${args[0]}': No such file or directory`;
 	
 		const folderNames = directory.subFolders.map((folder) => folder.id);
 		const fileNames = directory.files.map((file) => file.id);
diff --git a/src/features/applications/terminal/commands/make.js b/src/features/applications/terminal/commands/make.js
index 8b79b80..d9c3afd 100644
--- a/src/features/applications/terminal/commands/make.js
+++ b/src/features/applications/terminal/commands/make.js
@@ -1,6 +1,7 @@
 import Command from "../command.js";
 
-export const make = new Command("make", (args) => {
-	if (args[0] === "love")
-		return "make: *** No rule to make target `love'.  Stop.";
-});
\ No newline at end of file
+export const make = new Command("make")
+	.setExecute(function(args) {
+		if (args[0] === "love")
+			return `${this.name}: *** No rule to make target 'love'. Stop.`;
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/man.js b/src/features/applications/terminal/commands/man.js
index ff525be..e0ed37c 100644
--- a/src/features/applications/terminal/commands/man.js
+++ b/src/features/applications/terminal/commands/man.js
@@ -6,22 +6,38 @@ const MARGIN = 5;
 export const man = new Command("man")
 	.setRequireArgs(true)
 	.setManual({
-		purpose: "show system reference manuals",
-		usage: "man [OPTION]... page",
+		purpose: "Show system reference manuals",
+		usage: "man [OPTION]... page\n"
+			+ "man -k [OPTION]... regexp",
 		description: "Each page arguments given to man is normally the name of a command.\n"
-			+ "The manual page associated with this command is then found and displayed."
+			+ "The manual page associated with this command is then found and displayed.",
+		options: {
+			"-k": "Search for manual page using regexp"
+		}
 	})
-	.setExecute((args) => {
+	.setExecute(function(args, { options }) {
+		// Search function
+		if (options.includes("k")) {
+			const commands = CommandsManager.search(args[0]);
+			return commands.map((command) => {
+				if (command.manual?.purpose) {
+					return  `${command.name} - ${command.manual.purpose}`;
+				} else {
+					return command.name;
+				}
+			}).join("\n");
+		}
+
 		const commandName = args[0].toLowerCase();
 		const command = CommandsManager.find(commandName);
 
 		if (!command)
-			return `man: ${commandName}: Command not found`;
+			return `${this.name}: ${commandName}: Command not found`;
 
 		const manual = command.manual;
 
 		if (!manual)
-			return `man: ${commandName}: No manual found`;
+			return `${this.name}: ${commandName}: No manual found`;
 
 		const formatText = (text) => {
 			const lines = text.split("\n").map((line) => " ".repeat(MARGIN) + line);
@@ -50,5 +66,14 @@ export const man = new Command("man")
 			]);
 		}
 
+		if (manual.options) {
+			sections.push([
+				"OPTIONS",
+				formatText(Object.entries(manual.options).map(([key, value]) => {
+					return `${key} ${value}`;
+				}).join("\n"))
+			]);
+		}
+
 		return sections.map((section) => section.join("\n")).join("\n\n");
 	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/nice.js b/src/features/applications/terminal/commands/nice.js
index 2f82ebc..325608d 100644
--- a/src/features/applications/terminal/commands/nice.js
+++ b/src/features/applications/terminal/commands/nice.js
@@ -1,6 +1,7 @@
 import Command from "../command.js";
 
-export const nice = new Command("nice", (args) => {
-	if (args[0] === "man" && args[1] === "woman")
-		return "nice: No manual entry for woman";
-});
\ No newline at end of file
+export const nice = new Command("nice")
+	.setExecute(function(args) {
+		if (args[0] === "man" && args[1] === "woman")
+			return `${this.name}: No manual entry for woman`;
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/rm.js b/src/features/applications/terminal/commands/rm.js
index ea3a5d9..36b13c7 100644
--- a/src/features/applications/terminal/commands/rm.js
+++ b/src/features/applications/terminal/commands/rm.js
@@ -5,7 +5,7 @@ export const rm = new Command("rm", (args, { currentDirectory }) => {
 	const file = currentDirectory.findFile(name, extension);
 
 	if (!file)
-		return `rm: ${args[0]}: No such file`;
+		return `${this.name}: ${args[0]}: No such file`;
 	
 	file.delete();
 	return { blank: true };
diff --git a/src/features/applications/terminal/commands/rmdir.js b/src/features/applications/terminal/commands/rmdir.js
index 2cedd17..00517a3 100644
--- a/src/features/applications/terminal/commands/rmdir.js
+++ b/src/features/applications/terminal/commands/rmdir.js
@@ -5,7 +5,7 @@ export const rmdir = new Command("rmdir", (args, { currentDirectory }) => {
 	const folder = currentDirectory.findSubFolder(name);
 
 	if (!folder)
-		return `rmdir: ${args[0]}: No such directory`;
+		return `${this.name}: ${args[0]}: No such directory`;
 	
 	folder.delete();
 	return { blank: true };
diff --git a/src/features/applications/terminal/commands/touch.js b/src/features/applications/terminal/commands/touch.js
index 9b405c3..17b9c00 100644
--- a/src/features/applications/terminal/commands/touch.js
+++ b/src/features/applications/terminal/commands/touch.js
@@ -3,14 +3,14 @@ import Command from "../command.js";
 export const touch = new Command("touch")
 	.setRequireArgs(true)
 	.setManual({
-		purpose: "change file timestamps",
+		purpose: "Change file timestamps",
 		usage: "touch [OPTION]... FILE...",
 		description: "Update the access and modification times of each FILE to the current time.\n\n"
 			+ "A FILE argument that does not exist is created empty."
 	})
-	.setExecute((args, { currentDirectory }) => {
+	.setExecute(function(args, { currentDirectory }) {
 		if (args[0] === "girls\\" && args[1] === "boo**")
-			return "touch: Cannot touch 'girls boo**': Permission denied";
+			return `${this.name}: Cannot touch 'girls boo**': Permission denied`;
 	
 		const [name, extension] = args[0].split(".");
 	
diff --git a/src/features/applications/terminal/commands/whatis.js b/src/features/applications/terminal/commands/whatis.js
new file mode 100644
index 0000000..ff36cb9
--- /dev/null
+++ b/src/features/applications/terminal/commands/whatis.js
@@ -0,0 +1,17 @@
+import Command from "../command.js";
+import CommandsManager from "../commands.js";
+
+export const whatis = new Command("whatis")
+	.setRequireArgs(true)
+	.setExecute(function(args) {
+		const commandName = args[0].toLowerCase();
+		const command = CommandsManager.find(commandName);
+
+		if (!command)
+			return `${this.name}: ${commandName}: Command not found`;
+
+		if (!command.manual?.purpose)
+			return `${this.name}: ${commandName}: No information found`;
+
+		return `${commandName} - ${command.manual.purpose}`;
+	});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/whoami.js b/src/features/applications/terminal/commands/whoami.js
new file mode 100644
index 0000000..c8a93c5
--- /dev/null
+++ b/src/features/applications/terminal/commands/whoami.js
@@ -0,0 +1,5 @@
+import Command from "../command.js";
+
+export const whoami = new Command("whoami", (args, { username }) => {
+	return username;
+});
\ No newline at end of file
diff --git a/src/features/applications/terminal/commands/world.js b/src/features/applications/terminal/commands/world.js
index 6a46490..0adaa9f 100644
--- a/src/features/applications/terminal/commands/world.js
+++ b/src/features/applications/terminal/commands/world.js
@@ -1,5 +1,6 @@
 import Command from "../command.js";
 
-export const world = new Command("world", () => {
-	return "world: Not found";
-});
\ No newline at end of file
+export const world = new Command("world")
+	.setExecute(function() {
+		return `${this.name}: Not found`;
+	});
\ No newline at end of file