Node.js中fs.linkSync()方法的深入解析与应用

原文:https://www.geeksforgeeks.org/node-js-fs-linksync-method/

fs.linkSync()方法用于同步创建到指定路径的硬链接。创建的硬链接仍然指向同一个文件，即使该文件被重命名。硬链接也有链接文件的实际文件内容。

语法:

fs.linkSync( existingPath, newPath )


参数:该方法接受两个参数，如上所述，如下所述:

• Existing path: It is a string, buffer or web address, which indicates the file to which the symbolic link must be created.


• New path: It is a string, buffer or web address, which represents the file path where the symbolic link will be created.

下面的例子说明了 Node.js 中的 fs.linkSync()方法:

示例 1: 本示例创建到文件的硬链接。

// Node.js program to demonstrate the
// fs.linkSync() method
// Import the filesystem module
const fs = require('fs');
console.log("Contents of the text file:");
console.log(fs.readFileSync('example_file.txt', 'utf8'));
fs.linkSync(__dirname + "\\example_file.txt", "hardlinkToFile", 'file');
console.log("\nHard link created\n");
console.log("Contents of the hard link created:");
console.log(fs.readFileSync('hardlinkToFile', 'utf8'));


输出:

Contents of the text file:
Hello GeeksForGeeks
Hard link created
Contents of the hard link created:
Hello GeeksForGeeks


示例 2: 本示例创建文件的硬链接，并删除原始文件。原始文件的内容仍然可以通过硬链接访问。

// Node.js program to demonstrate the
// fs.linkSync() method
// Import the filesystem module
const fs = require('fs');
console.log("Contents of the text file:");
console.log(fs.readFileSync('example_file.txt', 'utf8'));
fs.linkSync(__dirname + "\\example_file.txt", "hardlinkToFile", 'file');
console.log("\nHard link created\n");
console.log("Contents of the hard link created:");
console.log(fs.readFileSync('hardlinkToFile', 'utf8'));
console.log("\nDeleting the original file");
fs.unlinkSync("example_file.txt");
console.log("\nContents of the hard link created:");
console.log(fs.readFileSync('hardlinkToFile', 'utf8'));


输出:

Contents of the text file:
Hello GeeksForGeeks
Hard link created
Contents of the hard link created:
Hello GeeksForGeeks
Deleting the original file
Contents of the hard link created:
Hello GeeksForGeeks


参考:https://nodejs . org/API/fs . html # fs _ fs _ linksync _ existing path _ new path