node.js使用fs模块的renameSync方法报错“ EXDEV: cross-device link not permitted, rename ‘F‘ -＞ ‘G“

Posted 2021-12-30 二木成林

异常

当使用fs模块的renameSync()方法时报错如下：

Error: EXDEV: cross-device link not permitted, rename 'F:\\trash.conf' -> 'G:\\Trash\\trash.conf'
?[90m    at Object.renameSync (node:fs:980:3)?[39m
    at Object.<anonymous> (F:\\Pre_Coding\\Pre_WebStorm_Project\\linux-trash-nodejs\\trash.js:31:25)
?[90m    at Module._compile (node:internal/modules/cjs/loader:1097:14)?[39m
?[90m    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1149:10)?[39m
?[90m    at Module.load (node:internal/modules/cjs/loader:975:32)?[39m
?[90m    at Function.Module._load (node:internal/modules/cjs/loader:822:12)?[39m
?[90m    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)?[39m
?[90m    at node:internal/main/run_main_module:17:47?[39m 
  errno: ?[33m-4037?[39m,
  syscall: ?[32m'rename'?[39m,
  code: ?[32m'EXDEV'?[39m,
  path: ?[32m'F:\\trash.conf'?[39m,
  dest: ?[32m'G:\\Trash\\trash.conf'?[39m


Node.js v17.1.0

错误代码

var fs = require('fs');
fs.renameSync('F:\\trash.conf', 'G:\\Trash\\trash.conf');

原因

这是跨区重命名文件出现的权限问题，错误代码中从F盘剪切文件到G盘属于跨区。

解决

先将源文件拷贝到另外分区的目标文件，然后再使用unlink删除源文件。

正确代码

var fs = require('fs');
var deletedFilePath = 'F:\\trash.conf';
var trashFilePath = 'G:\\Trash\\trash.conf';
var rs = fs.createReadStream(deletedFilePath);
var ws = fs.createWriteStream(trashFilePath);
rs.pipe(ws);
rs.on('end', function () 
    fs.unlinkSync(deletedFilePath);
);