Function fsync

test/parallel/test-trace-events-fs-async.js:97–104

()

}

function fsync() {
  const fs = require('fs');
  fs.writeFileSync('fs9.txt', '123', 'utf8');
  const fd = fs.openSync('fs9.txt', 'r+');
  fs.fsync(fd, () => {
    fs.unlinkSync('fs9.txt');
  });
}

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