callback_avoid_4.js

const fs=require('fs');

const ab=['access','rename','ftruncate','chown','lchown','cmod','fchmod','stat','lstat','fstat','link','symlink',
		'readlink','realpath','unlink','rmdir','readdir','close','open','utimes',
		'futimes','fsync','write','read','readFile','writeFile','appendFile','mkdir','mkdtemp']
    
// fchown fdatasync mkdtemp rename truncate
ab.forEach(name=>{
  if(!fs[name])return;
    exports[name]=(...n)=>{
      return new Promise((res,rej)=>{
        fs[name](...n,(er,d)=>{
          if(er)rej(er)
          if(d)res(d)
        })
      })
    }
})