253 lines
		
	
	
		
			7.3 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			253 lines
		
	
	
		
			7.3 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
<html>
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<head>
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    <title>Konsole</title>
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    <style>
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        ::-webkit-scrollbar { width: 10px; }
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        ::-webkit-scrollbar-track { background: rgba(0, 0, 0, 0); }
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        ::-webkit-scrollbar-thumb { background: #555; }
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        ::-webkit-scrollbar-thumb:hover { background: #777; }
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        body, html {
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            height: 100%;
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            width: 100%;
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            margin: 0;
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            padding: 0;
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            font-family: monospace;
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            font-size: 1rem;
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            background-color: #333;
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            color: #0f0;
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        }
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        .console {
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            display: flex;
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            flex-direction: column;
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            padding: 1rem;
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        }
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        .console-input {
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            display: flex;
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        }
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        .console-input-prompt {
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            padding-right: 0.55em;
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        }
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        .console-input-field {
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            border: none;
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            outline: none;
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            font-size: 1rem;
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            background-color: rgba(0, 0, 0, 0);
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            color: #0f0;
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            font-family: monospace;
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            flex-grow: 1;
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            padding: 0;
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        }
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        .console-output {
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            flex-grow: 1;
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        }
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        .console-output-line {
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            margin: 0;
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            padding: 0;
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            min-height: 1.25rem;
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        }
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    </style>
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    <script>
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        window.cli = {};
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    </script>
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    <script>
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        window.cli['clear'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Clear console output';
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            },
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            run: args => {
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                output.innerHTML = '';
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            }
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        }
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    </script>
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    <script>
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        window.cli['echo'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Output text to console';
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            },
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            run: args => {
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                return args.join(' ');
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            }
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        }
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    </script>
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    <script>
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        window.cli['exit'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'End session';
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            },
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            run: args => {
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                process('clear');
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                history = [];
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                historyIndex = 0;
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                header();
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            }
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        }
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    </script>
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    <script>
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        window.cli['help'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Display all commands';
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            },
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            run: args => {
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                return Object.keys(window.cli).map(command => `${command} - ${window.cli[command].help()}`).join('<br>') + '<br><br>';
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            }
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        }
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    </script>
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    <script>
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        window.cli['hostname'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Get computer hostname';
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            },
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            run: args => {
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                return 'localhost'
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            }
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        }
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    </script>
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    <script>
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        window.cli['man'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Command manual';
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            },
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            run: args => {
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                return window.cli[args[0]].help();
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            }
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        }
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    </script>
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    <script>
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        window.cli['whoami'] = {
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            autocomplete: () => {
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                return [];
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            },
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            help: () => {
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                return 'Get username';
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            },
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            run: args => {
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                return 'root'
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            }
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        }
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    </script>
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</head>
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<body>
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    <div class="console">
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        <div class="console-output"></div>
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        <div class="console-input">
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            <div class="console-input-prompt">root@localhost:~ #</div>
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            <input class="console-input-field" type="text" autofocus>
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        </div>
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    </div>
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    <script>
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        const output = document.getElementsByClassName('console-output')[0];
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        const input = document.getElementsByClassName('console-input-field')[0];
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        let history = [];
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        let historyIndex = 0;
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        function disableInput() {
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            input.disabled = true;
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            document.getElementsByClassName('console-input-prompt')[0].style.visibility = 'hidden';
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        }
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        function enableInput() {
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            input.disabled = false;
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            input.focus();
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            document.getElementsByClassName('console-input-prompt')[0].style.visibility = 'visible';
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        }
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        function header() {
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            stdOut('Konsole 0.1.0 LTS localhost tty1<br><br>localhost login: root<br>password:<br><br>');
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        }
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        function process(command) {
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            (Array.isArray(command) ? command.join(' ') : command).split(';').filter(c => !!c).forEach(c => {
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                const parts = c.split(' ').filter(c => !!c);
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                if(window.cli[parts[0]] == undefined || window.cli[parts[0]].run == undefined) {
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                    stdErr(`${parts[0]}: command not found`);
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                } else {
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                    try {
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                        const out = window.cli[parts[0]].run(parts.slice(1));
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                        if(!!out) stdOut(out);
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                    } catch(err) {
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                        console.error(err)
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                        stdErr(`${parts[0]}: exited with a non-zero status`);
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                    }
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                }
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            });
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        }
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        function stdErr(text) {
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            const p = document.createElement('p');
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            p.classList = 'console-output-line error';
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            p.innerText = text;
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            output.appendChild(p);
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        }
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        function stdOut(text, html=true) {
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            const p = document.createElement('p');
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            p.classList = 'console-output-line';
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            p[html ? 'innerHTML' : 'innerText'] = text;
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            output.appendChild(p);
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        }
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        input.addEventListener('blur', event => input.focus());
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        input.addEventListener("keydown", event => {
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            if(event.key == "Enter") {
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                disableInput();
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                inputValue = input.value;
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                input.value = '';
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                stdOut(`root@localhost:~ # ${inputValue}`, false);
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                if(!!inputValue) {
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                    history.push(inputValue);
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                    historyIndex = history.length;
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                    process(inputValue)
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                }
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                enableInput();
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            } else if(event.key == 'Up' || event.key == 'ArrowUp') {
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                if(historyIndex > 0) historyIndex--;
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                input.value = historyIndex == history.length ? '' : history[historyIndex];
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                setTimeout(() => {
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                    const end = input.value.length;
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                    input.setSelectionRange(end, end);
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                    input.focus();
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                }, 1)
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            } else if(event.key == 'Down' || event.key == 'ArrowDown') {
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                if(historyIndex < history.length) historyIndex++;
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                input.value = historyIndex == history.length ? '' : history[historyIndex];
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                setTimeout(() => {
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                    const end = input.value.length;
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                    input.setSelectionRange(end, end);
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                    input.focus();
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                }, 1)
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            }
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        });
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        header();
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    </script>
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</body>
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</html>
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