Add Node.js executor for DMOJ

README.md

@@ -67,6 +67,7 @@ The judge can also grade in the languages listed below:
 * Groovy
 * Haskell
 * INTERCAL
+* JavaScript (Node.js and V8)
 * Kotlin
 * Lean 4
 * LLVM IR

dmoj/executors/NODEJS.py

@@ -0,0 +1,32 @@
+from dmoj.cptbox.filesystem_policies import ExactFile
+from dmoj.executors.script_executor import ScriptExecutor
+
+
+class Executor(ScriptExecutor):
+    ext = 'js'
+    command = 'node'
+    nproc = -1
+    command_paths = ['node', 'nodejs']
+    syscalls = ['capget', 'eventfd2', 'shutdown', 'pkey_alloc']
+    address_grace = 1048576
+    test_program = """
+process.stdin.on('readable', () => {
+    const chunk = process.stdin.read();
+    if (chunk != null) {
+        process.stdout.write(chunk);
+    }
+});
+"""
+
+    def get_env(self):
+        env = super().get_env()
+        # Disable io_uring due to potential security implications
+        env['UV_USE_IO_URING'] = '0'
+        return env
+
+    def get_fs(self):
+        return super().get_fs() + [ExactFile('/usr/lib/ssl/openssl.cnf')]
+
+    @classmethod
+    def get_version_flags(cls, command):
+        return ['--version']