update 2026-10-07 18:47:42

luci-app-oxidns/scripts/strip-tar-eof.mjs

@@ -0,0 +1,28 @@
+#!/usr/bin/env node
+
+import fs from 'node:fs';
+
+const [input, output] = process.argv.slice(2);
+
+if (!input || !output) {
+	console.error('usage: strip-tar-eof.mjs <input.tar> <output.tar>');
+	process.exit(1);
+}
+
+const blockSize = 512;
+const data = fs.readFileSync(input);
+let end = data.length;
+
+function isZeroBlock(offset) {
+	for (let i = offset; i < offset + blockSize; i++) {
+		if (data[i] !== 0)
+			return false;
+	}
+
+	return true;
+}
+
+while (end >= blockSize && isZeroBlock(end - blockSize))
+	end -= blockSize;
+
+fs.writeFileSync(output, data.subarray(0, end));