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Node.js | stats.ino Property

  • Last Updated : 23 Jun, 2020

The stats.ino property is an inbuilt application programming interface of the fs.Stats class is used to get the “Inode” number of the file specified by the file system.

Syntax:

stats.ino;

Parameters: This property does not have any parameter.

Return Value: It returns a number or BigInt value which represents the “Inode” number of the file specified by the file system.

Below examples illustrate the use of stats.ino property in Node.js:



Example 1:




// Node.js program to demonstrate the   
// stats.ino Property
  
// Accessing fs module
const fs = require('fs');
  
// Calling stats.ino property from
// fs.Stats  class
// For files using stat
fs.stat('./filename.txt', (err, stats) => {
    if (err) throw err;
    console.log("using stat: the \"Inode\" "
        + "number of the file is  " + stats.ino);
});
  
// Using lstat
fs.lstat('./filename.txt', (err, stats) => {
    if (err) throw err;
    console.log("using lstat: the \"Inode\" "
        + "number of the file is  " + stats.ino);
});
  
// For directories using stat
fs.stat('./', (err, stats) => {
    if (err) throw err;
    console.log("using stat: the \"Inode\" "
        + "number of the file is  " + stats.ino);
});
  
//using lstat
fs.lstat('./', (err, stats) => {
    if (err) throw err;
    console.log("using lstat: the \"Inode\" "
    + "number of the file is  " + stats.ino);
});

Output:

using stat: the "Inode" number of the file is  1125899907737972
using lstat: the "Inode" number of the file is  1125899907737972
using stat: the "Inode" number of the file is  14918173765820528
using lstat: the "Inode" number of the file is  14918173765820528

Example 2:




// Node.js program to demonstrate the   
// stats.ino Property
  
// Accessing fs module
const fs = require('fs').promises;
   
// Calling stats.ino property from
// fs.Stats class
(async() => {
  const stats = await fs.stat('./filename.txt');
   
  // Using stat synchronous
  console.log("The \"Inode\" number "
    + "of the file is  "+stats.ino);
})().catch(console.error)

Output:

The "Inode" number of the file is  1125899907737972

Note: The above program will compile and run by using the node filename.js command and use the file_path correctly.

Reference: https://nodejs.org/api/fs.html#fs_stats_ino




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