fs.accessSync(path[, mode])

    同步地测试用户对 path 指定的文件或目录的权限。 mode 参数是可选的整数,指定要执行的可访问性检查。 mode 应该是值 fs.constants.F_OK 或由 fs.constants.R_OKfs.constants.W_OKfs.constants.X_OK 中的任何一个(例如 fs.constants.W_OK | fs.constants.R_OK)的按位或组成的掩码。 查看文件访问的常量以获取可能的 mode 值。

    Synchronously tests a user's permissions for the file or directory specified by path. The mode argument is an optional integer that specifies the accessibility checks to be performed. mode should be either the value fs.constants.F_OK or a mask consisting of the bitwise OR of any of fs.constants.R_OK, fs.constants.W_OK, and fs.constants.X_OK (e.g. fs.constants.W_OK | fs.constants.R_OK). Check File access constants for possible values of mode.

    If any of the accessibility checks fail, an Error will be thrown. Otherwise, the method will return undefined.

    import { accessSync, constants } from 'node:fs';
    try {
      accessSync('etc/passwd', constants.R_OK | constants.W_OK);
      console.log('can read/write');
    } catch (err) {
      console.error('no access!');