0ct0pu5
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webvm


			
				
					
						
						
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    <title>WebVM - Linux virtualization in WebAssembly</title>

    <meta name="description" content="Server-less virtual machine, networking included, running browser-side in HTML5/WebAssembly. Code in any programming language inside this Linux terminal.">
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    <script src="network.js"></script>
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          <pre style="font-family: monospace; font-weight: 600; font-size: large; color: #ad7fa8;">

__      __   _  __   ____  __
\ \    / /__| |_\ \ / /  \/  |
 \ \/\/ / -_) '_ \ V /| |\/| |
  \_/\_/\___|_.__/\_/ |_|  |_|
          </pre>
          <div style="height:100%;display: flex; flex-direction: column;justify-content: space-between;">
            <div style="padding-top: 0.7em;font-size: 0.3em; font-weight: 200;vertical-align:center;height:50px;">
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                      <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                        <span>Made with &#10084;&#65039; by </span>
                        <img src="assets/leaningtech.png" height="40px" style="margin-left: 5px;">
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                <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                  <span>CPU </span>
                  <span id="cpuactivity" style="margin-left: 7px;">&#x1F7E2;</span>
                </div>
                <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                  <span>HDD </span>
                  <span id="hddactivity" style="margin-left: 7px;">&#x1F7E2;</span>
                </div>
                <a id="loginLink" style="text-decoration: none; height: 100%; cursor:not-allowed;">
                  <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                    <span id="networkStatus">Connect via Tailscale </span>
                    <img src="assets/tailscale.svg" height="40px" style="margin-left: 7px;">
                  </div>
                </a>
                <a href="https://discord.gg/yTNZgySKGa" style="text-decoration: none; height: 100%;" target="_blank">
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                    <span>Join Discord </span>
                    <img src="assets/discord-mark-blue.svg" height="40px" style="margin-left: 7px;">
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    <main style="display: flex; flex-direction: row; justify-content: space-between; margin:0; height:100%;">
      <div style="flex-grow:1; height:100%;display:inline-block;margin:0;" class="scrollbar" id="console">
      </div>

    </main>
    <script>

	//Utility namespace to group all functionality related to printing (both error and non error) messages
	const color= "\x1b[1;35m";
	const bold= "\x1b[1;37m";
	const underline= "\x1b[94;4m";
	const normal= "\x1b[0m";
	var printOnTerm = {
		getAsciiTitle: function ()
		{
			var title = [
				color + "                        __      __   _  __   ____  __       " + normal,
				color + "                        \\ \\    / /__| |_\\ \\ / /  \\/  | " + normal,
				color + "                         \\ \\/\\/ / -_) '_ \\ V /| |\\/| | " + normal,
				color + "                          \\_/\\_/\\___|_.__/\\_/ |_|  |_|  " + normal,

			];
			return title;
		},
		getAsciiText: function ()
		{
			var text = [
				"+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+",
				"|                                                                             |",
				"| WebVM is a server-less virtual Linux environment running fully client-side  |",
				"| in HTML5/WebAssembly.                                                       |",
				"|                                                                             |",
				"| WebVM is powered by the CheerpX virtualization engine, which enables safe,  |",
				"| sandboxed client-side execution of x86 binaries on any browser.             |",
				"|                                                                             |",
				"| CheerpX includes an x86-to-WebAssembly JIT compiler, a virtual block-based  |",
				"| file system, and a Linux syscall emulator.                                  |",
				"|                                                                             |",
				"| [NEW!] WebVM now supports full TCP and UDP networking via Tailscale!        |",
				"| Click on 'Tailscale Login' to enable it. Read the announcement:             |",
				"|                                                                             |",
				"| " + underline + "https://leaningtech.com/webvm-virtual-machine-with-networking-via-tailscale" + normal +" |",
				"|                                                                             |",
				"+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+",
				"",
				"   Welcome to WebVM. If unsure, try these examples:",
				"",
				"     python3 examples/python3/fibonacci.py ",
				"     gcc -o helloworld examples/c/helloworld.c && ./helloworld",
				"     objdump -d ./helloworld | less -M",
				"     vim examples/c/helloworld.c",
				"     curl --max-time 15 parrot.live  # requires networking",
				"",
				];
			return text;
		},
		getSharedArrayBufferMissingMessage: function ()
		{
			const text = [
				"",
				"",
				color + "CheerpX could not start" + normal,
				"",
				"CheerpX depends on JavaScript's SharedArrayBuffer, that your browser",
				"     does not support.",
				"",
				"SharedArrayBuffer is currently enabled by default on recent",
				"     versions of Chrome, Edge, Firefox and Safari.",
				"",
				"",
				"Give it a try from another browser!",
				]

			return text;
		},
		getErrorMessage: function (error_message)
		{
			const text = [
				"",
				"",
				color + "CheerpX could not start" + normal,
				"",
				"CheerpX internal error message is:",
				error_message,
				"",
				"",
				"CheerpX is expected to work with recent desktop versions of Chrome, Edge, Firefox and Safari",
				"",
				"",
				"Give it a try from a desktop version / another browser!",
				]

			return text;
		},
		printMessage: function (text) {
			for (var i=0; i<text.length; i++)
			{
				term.write(text[i]);
				term.write('\n');
			}
		},
		printError: function (message)
		{
			this.printMessage(message);

			term.write("\n\n");

			function writeCustom(something)
			{
				term.write(something);
			}
		},
	};

	var consoleDiv = document.getElementById("console");

	//xterm.js related logic
	var term = new Terminal({cursorBlink:true,convertEol:true, fontFamily:"monospace", fontWeight: 400, fontWeightBold: 700});
	var fitAddon = new FitAddon.FitAddon();
	term.loadAddon(fitAddon);
	term.open(consoleDiv);
	term.scrollToTop();

	fitAddon.fit();
	window.addEventListener("resize", function(ev){fitAddon.fit();}, false);
	term.focus();
	var cxReadFunc = null;
	function writeData(buf)
	{
		term.write(new Uint8Array(buf));
	}
	function readData(str)
	{
		if(cxReadFunc == null)
			return;
		for(var i=0;i<str.length;i++)
			cxReadFunc(str.charCodeAt(i));
	}
	term.onData(readData);

	//Actual CheerpX and bash specific logic
	function runBash()
	{
		const structure = {
			name: "bash",
			cmd: "/bin/bash",
			args: ["--login"],
			env: ["HOME=/home/user", "TERM=xterm", "USER=user", "SHELL=/bin/bash", "EDITOR=vim", "LANG=en_US.UTF-8", "LC_ALL=C"],
			expectedPrompt: ">",
			versionOpt: "--version",
			comment_line: "#",
			description_line: "The original Bourne Again SHell",
		}
		if (typeof SharedArrayBuffer === "undefined")
		{
			printOnTerm.printError(printOnTerm.getSharedArrayBufferMissingMessage());
			return;
		}

		let networkInterface = setupNetworkInterface();

		async function runTest(cx)
		{
			registerNetworkLogin(cx, networkInterface);

			term.scrollToBottom();

			async function cxLogAndRun(cheerpx, cmd, args, env)
			{
				await cheerpx.run(cmd, args, env);
				printOnTerm.printMessage(" ");
			}

			cxReadFunc = cx.setCustomConsole(writeData, term.cols, term.rows);

			function preventDefaults (e) {
				e.preventDefault()
				e.stopPropagation()
			}
			consoleDiv.addEventListener("dragover", preventDefaults, false);
			consoleDiv.addEventListener("dragenter", preventDefaults, false);
			consoleDiv.addEventListener("dragleave", preventDefaults, false);
			consoleDiv.addEventListener("drop", preventDefaults, false);

			// The variables uid and gid are replaced by Github Actions.
			var opts = {env:structure.env, cwd:"/home/user", uid: UID, gid: GID};
			while (true)
			{
				await cxLogAndRun(cx, structure.cmd, structure.args, opts);
			}
		}
		function failCallback(err)
		{
			printOnTerm.printError(printOnTerm.getErrorMessage(err));
		}
		function devCallback(state)
		{
			var h = document.getElementById("hddactivity");
			if(state == "ready")
				h.textContent = "\u{1F7E2}";
			else
				h.textContent = "\u{1F7E0}";
		}
		function cpuCallback(state)
		{
			var h = document.getElementById("cpuactivity");
			if(state == "ready")
				h.textContent = "\u{1F7E2}";
			else
				h.textContent = "\u{1F7E0}";
		}
		// The device url and type are replaced by Github Actions.
		CheerpXApp.create({devices:[{type:DEVICE_TYPE,url:IMAGE_URL,name:"block1"}],mounts:[{type:"ext2",dev:"block1",path:"/"},{type:"cheerpOS",dev:"/app",path:"/app"},{type:"cheerpOS",dev:"/str",path:"/data"},{type:"devs",dev:"",path:"/dev"}], networkInterface: networkInterface, activityInterface: {cpu: cpuCallback, dev: devCallback}}).then(runTest, failCallback);
	}
	function initialMessage()
	{
		printOnTerm.printMessage([""]);
		printOnTerm.printMessage(printOnTerm.getAsciiText());
		term.registerLinkMatcher(/https:\/\/leaningtech.com\/webvm-virtual-machine-with-networking-via-tailscale/, function(mouseEvent, matchedString) {
			window.open(matchedString, "_blank")
		});
		console.log("Welcome. We appreciate curiosity, but be warned that keeping the DevTools open causes significant performance degradation and crashes.");
	}
	initialMessage();
	async function loadCX()
	{
		// Find the latest build
		var r = await fetch("https://cheerpxdemos.leaningtech.com/publicdeploy/LATEST.txt");
		var url = await r.text();
		url = url.trim();
		var script = document.createElement('script');
		script.type = 'text/javascript';
		script.src = url;
		script.addEventListener("load", runBash, false);
		document.head.appendChild(script);
	}
	loadCX();
    </script>
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