Get available diskspace in ruby

Question

What is the best way to get diskspace information with ruby. I would prefer a pure ruby solution. If not possible (even with additional gems), it could also use any command available in a standard ubuntu desktop installation to parse the information into ruby.

under windows or linux? , if windows there is a Question for that http://stackoverflow.com/questions/3258518/ruby-get-available-disk-drives — Saif al Harthi, Dec 22 '10 at 11:33

score 39 · Accepted Answer · edited Oct 23 '15 at 22:35

39

You could use the sys-filesystem gem (cross platform friendly)

require 'sys/filesystem'

stat = Sys::Filesystem.stat("/")
mb_available = stat.block_size * stat.blocks_available / 1024 / 1024

edited Oct 23 '15 at 22:35

rogerdpack

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answered May 28 '11 at 11:44

dkam

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is there any way to get the total remaining size of root disk in ruby for Linux and Windows without using any gem? – NN796 Jun 02 '20 at 07:37

score 9 · Answer 2 · answered Jan 21 '11 at 21:16

9

How about simply:

spaceMb_i = `df -m /dev/sda1`.split(/\b/)[24].to_i

where '/dev/sda1' is the path, determined by simply running df

answered Jan 21 '11 at 21:16

Steph

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Didn't work for me for some reason (the split?) but this did `bytes_free = \`df -B1 .\`.split[10].to_i` – rogerdpack Oct 23 '15 at 22:43
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is there any way to get the total remaining size of root disk in ruby for Linux and Windows without using any gem? – NN796 Jun 02 '20 at 07:37

score 5 · Answer 3 · answered Jan 04 '12 at 01:23

5

(Ruby) Daniel Berger maintains a lot of gems in this field. To be found there: sys-cpu, sys-uptime, sys-uname, sys-proctable, sys-host, sys-admin, sys-filesystem. They are (AFAIK) multi-platform.

answered Jan 04 '12 at 01:23

steenslag

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Marcin Nowicki · Answer 4 · 2013-12-05T11:49:54.703

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Hi i have created gem for that: https://github.com/pr0d1r2/free_disk_space

You can use it by:

gem 'free_disk_space' # add line to Gemfile

Inside code use methods:

FreeDiskSpace.terabytes('/')

FreeDiskSpace.gigabytes('/')

FreeDiskSpace.megabytes('/')

FreeDiskSpace.kilobytes('/')

FreeDiskSpace.bytes('/')

edited Dec 05 '13 at 11:49

answered Nov 16 '13 at 16:08

Marcin Nowicki

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"While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes." – zero323 Nov 16 '13 at 16:28
gems not updated in 7 years are not helpfull – fatfrog Jan 29 '22 at 20:42
The gem generates a class based on the current accepted response so it seems safe to use @fatfrog, or to copy that file to your project. – Jorge Sampayo Jul 10 '23 at 14:43

diegeelvis_SA · Answer 5 · 2018-08-17T09:10:31.517

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This is an extension to dkams answer which is not wrong, but calculated the complete space of ones drive, to check for the remaining usable .i.e. the FREE space on a drive substitute kdams secodn line with the following:

gb_available = stat.bytes_free / 1024 / 1024 / 1024

This will return the remaining free space on your drive in Gigs.

edited Aug 17 '18 at 09:10

answered Jun 11 '15 at 11:40

diegeelvis_SA

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If it's in Gigs why call it mb_available then? – zachaysan Mar 30 '16 at 10:05
@zachaysan that would be because of how the params are `1024 / 1024 / 1024` where it goes from byte, megabyte, gigabyte. Which seeing `bytes_free` should have been a dead give away. `mb_available` is because this is the standard way to display any amount of data unless of course its below 1 mb. Although with the params you have control of how you want it (KB, MB, GB). – DotSlashCoding Jan 31 '17 at 01:19
@DotSlashCoding If `bytes_free` returns bytes (which it does), and then we divide it by 1024 three times we get: bytes -> kilobytes -> megabytes -> gigabytes. So @zachaysan's question is why the variable is named `mb_available` instead of the more accurate `gb_available`. – aidan Aug 13 '18 at 01:29
@aidan I'm confused now on how GB would be more accurate than a smaller more precise value? All he did was assign mb_available to total bytes / (divided by) 1024 to get the gigs available. The original question/answer had nothing to do with GB, idk why this one does... `Kilobyte (KB) 1,024 Bytes Megabyte (MB) 1,024 Kilobytes` Starts in bytes: `1024 BYTES; 1024 KILOBYTES; 1024 MEGABYTES` Where the resulting value would be less than needed to move up into `1024 GIGABYTES` values. – DotSlashCoding Aug 15 '18 at 21:01
@DotSlashCoding I would expect a variable called `mb_available` to contain a number that represents the number of megabytes available, and I would expect a variable called `gb_available` to contain a number that represents the number of gigabytes available. But in the answer above, we have "gigabytes available" stored in a variable which has a name that implies it's actually storing "megabytes available" - this is misleading and should be avoided. – aidan Aug 15 '18 at 23:54
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Hi Guys, yes i made mistake, thank you, the var should be called gb_available. – diegeelvis_SA Aug 17 '18 at 09:10
is there any way to get the total remaining size of root disk in ruby for Linux and Windows without using any gem? – NN796 Jun 02 '20 at 07:38

score 1 · Answer 6 · edited Aug 31 '21 at 12:27

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Similar to comment rogerdpack's comment to get the space free in GB / MB you may try following

# Get free space in Gb in present partition
gb_free = `df -BG .`.split[10].to_i

# Get free space in MB in /dev/sda1 partition
mb_free = `df -BM /dev/sda1`.split[10].to_i
puts  gb_free, mb_free

edited Aug 31 '21 at 12:27

zed_0xff

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answered Jun 23 '16 at 09:52

Swapnil jaiswal

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What's the double asterisk (`**`) about? – hagello Mar 05 '19 at 16:03

score 1 · Answer 7 · answered Oct 31 '16 at 10:38

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This works only on a Linux system: If you don't mind calling out to the shell, you can use df for a filesystem and parse the output with a Regexp:

fs_to_check = '/boot'
df_output = `df #{fs_to_check}`
disk_line = df_output.split(/\n/)[1]
disk_free_bytes = disk_line.match(/(.+)\s+(\d+)\s+(\d+)\s+(\d+)\s+/)[4].to_i
disk_free_mbs = disk_free_bytes / 1024
puts(disk_free_mbs)

answered Oct 31 '16 at 10:38

Motine

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is there any way to get the total remaining size of root disk in ruby for Linux and Windows without using any gem? – NN796 Jun 02 '20 at 07:41

score 0 · Answer 8 · answered Jul 14 '13 at 02:20

0

def check_disk_space
  system('df -H | grep debug > ff')
  ss = File.open('ff').read.split(/\s+/)
  system('rm ff')
  "#{ss[3]}"
end

Used under ubuntu, to check debugs size，put the available size as output.

answered Jul 14 '13 at 02:20

szpapas

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score 0 · Answer 9 · answered Apr 15 '19 at 04:42

0

I believe this is more robust.

filesystem = "/dev/sda1"
free_megabytes = `LANG=C df -m #{filesystem}`.split("\n").map do |line|
  line.split.first(4)
end.transpose.to_h["Available"]&.to_i
puts(free_megabytes)

answered Apr 15 '19 at 04:42

cuzic

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score 0 · Answer 10 · answered Oct 19 '22 at 23:06

My gem-free solution (linux only):

storage_info = `df -h | grep "sda1" -w`

# storage_info => "/dev/sda1        39G   27G   12G  70% /"

then depending on the exact info you may need (total space, used space, free space, used space in percentage) you could do:

free_space = storage_info.split(" ")[3]

# free_space => "12G"

score -4 · Answer 11 · answered Jan 12 '16 at 06:45

-4

A gem free solution, answer in bytes:

(File.exists?('C:\\') ? `dir /-C`.match(/(\d+) bytes free/) : `df .`.match(/(\d+)\s*\d*%/)).captures[0].to_i

answered Jan 12 '16 at 06:45

Tatu Lahtela

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Get available diskspace in ruby

11 Answers11

You can use it by:

Inside code use methods:

Linked