javascript - 在 JavaScript 中重命名返回 "EPERM: operation not permitted"

Question

在我的 windows 服务器中，我发现 fs.rename 函数总是返回以下错误:

error code is Error: EPERM: operation not permitted, rename 'C:\javascript\nodejs\a.txt' -> 'C:\javascript\nodejs\b.txt'

下面是测试代码:

var fs = require('fs');

fs.writeFileSync('a.txt',"This is a file")
fs.writeFileSync('b.txt',"This is another file")

fs.rename('a.txt','b.txt',function (err) {
            console.log("error code is " + err);
       });

var text = fs.readFileSync('b.txt', "utf-8");

console.log(text) 

但是，在当前文件夹中，我确实看到了原始文件“a.txt”以及新重命名的文件“b.txt”。

Answer 1

fs.rename只是 rename 的包装器，根据 rename docs :

EPERM or EACCES
  The directory containing oldpath has the sticky bit (S_ISVTX)
  set and the process's effective user ID is neither the user ID
  of the file to be deleted nor that of the directory containing
  it, and the process is not privileged (Linux: does not have
  the CAP_FOWNER capability); or newpath is an existing file and
  the directory containing it has the sticky bit set and the
  process's effective user ID is neither the user ID of the file
  to be replaced nor that of the directory containing it, and
  the process is not privileged (Linux: does not have the
  CAP_FOWNER capability); or the filesystem containing pathname
  does not support renaming of the type requested.

您可能没有删除文件的权限，或者目标文件名已经存在。