Function copyfile

test/parallel/test-trace-events-fs-async.js:53–60

()

}

function copyfile() {
  const fs = require('fs');
  fs.writeFileSync('fs4.txt', '123', 'utf8');
  fs.copyFile('fs4.txt', 'a.txt', () => {
    fs.unlinkSync('fs4.txt');
    fs.unlinkSync('a.txt');
  });
}

function fchmod() {
  const fs = require('fs');