FS 常量

以下常量由 fs.constants 和 fsPromises.constants 导出。

并非所有常量在每个操作系统上都可用；这对于 Windows 尤其重要，因为许多 POSIX 特定定义不可用。 对于便携式应用程序，建议在使用前检查它们的存在。

要使用多个常量，请使用按位或 | 运算符。

示例：

import { open, constants } from 'node:fs';

const {
  O_RDWR,
  O_CREAT,
  O_EXCL
} = constants;

open('/path/to/my/file', O_RDWR | O_CREAT | O_EXCL, (err, fd) => {
  // ...
});

The following constants are exported by fs.constants and fsPromises.constants.

Not every constant will be available on every operating system; this is especially important for Windows, where many of the POSIX specific definitions are not available. For portable applications it is recommended to check for their presence before use.

To use more than one constant, use the bitwise OR | operator.

Example:

import { open, constants } from 'node:fs';

const {
  O_RDWR,
  O_CREAT,
  O_EXCL
} = constants;

open('/path/to/my/file', O_RDWR | O_CREAT | O_EXCL, (err, fd) => {
  // ...
});