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node-df

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node-df

A cross-platform Node.js wrapper around the standard Unix computer program, df.

  • 0.1.4
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df

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node-df (abbreviation of disk free) is a cross-platform Node.js wrapper around the standard Unix computer program, df.

Installation

$ npm install node-df

Usage

Basic

var
    df = require('node-df');

df(function (error, response) {
    if (error) { throw error; }

    console.log(JSON.stringify(response, null, 2));
});

Output from df looks like this:

[
  {
    "filesystem": "/dev/disk0s2",
    "size": 487546976,
    "used": 164493356,
    "available": 322797620,
    "capacity": 0.34,
    "mount": "/"
  },
  {
    "filesystem": "devfs",
    "size": 186,
    "used": 186,
    "available": 0,
    "capacity": 1,
    "mount": "/dev"
  },
  {
    "filesystem": "map -hosts",
    "size": 0,
    "used": 0,
    "available": 0,
    "capacity": 1,
    "mount": "/net"
  },
  {
    "filesystem": "map auto_home",
    "size": 0,
    "used": 0,
    "available": 0,
    "capacity": 1,
    "mount": "/home"
  },
  {
    "filesystem": "localhost:/CPYpGwk1x_UGJYGx-93flp",
    "size": 487546976,
    "used": 487546976,
    "available": 0,
    "capacity": 1,
    "mount": "/Volumes/MobileBackups"
  }
]

Values for size, used and available are expressed in KiB (1024 bytes).

Value for capacity is a number between 0 and 1. capacity is also known as used%

node-df correctly parsed output from df unix program for filesystems and mount folders with whitespaces in the name.

Advanced

var
    options = {
        file: '/',
        prefixMultiplier: 'GB',
        isDisplayPrefixMultiplier: true,
        precision: 2
    };

df(options, function (error, response) {
    if (error) { throw error; }

    console.log(JSON.stringify(response, null, 2));
});

Output from df now looks like this:

[
  {
    "filesystem": "/dev/disk0s2",
    "size": "499.25GB",
    "used": "168.44GB",
    "available": "330.54GB",
    "capacity": 0.34,
    "mount": "/"
  }
]
Options
  • file: output the amount of free space of the file system containing the specified file;
  • prefixMultiplier: convert size, used and available values from KiB to MiB, GiB, PiB, EiB, ZiB, YiB, MB, GB, PB, EB, ZB, YB;
  • isDisplayPrefixMultiplier: if true, values for size, used and available are converted to strings and prefixMultiplier is displayed (see example above).
  • precision: round size, used and available values to precision decimal digits.

Keywords

FAQs

Package last updated on 16 Feb 2018

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