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The Windows dir directory listing command has a line at the end showing the total amount of space taken up by the files listed. For example, dir *.exe shows all the .exe files in the current directory, their sizes, and the sum total of their sizes. I'd love to have similar functionality with my dir alias in bash, but I'm not sure exactly how to go about it.

Currently, I have alias dir='ls -FaGl' in my.bash_profile`, showing

drwxr-x---+  24 mattdmo  4096 Mar 14 16:35 ./
drwxr-x--x. 256 root    12288 Apr  8 21:29 ../
-rw-------    1 mattdmo 13795 Apr  4 17:52 .bash_history
-rw-r--r--    1 mattdmo    18 May 10  2012 .bash_logout
-rw-r--r--    1 mattdmo   395 Dec  9 17:33 .bash_profile
-rw-r--r--    1 mattdmo   176 May 10  2012 .bash_profile~
-rw-r--r--    1 mattdmo   411 Dec  9 17:33 .bashrc
-rw-r--r--    1 mattdmo   124 May 10  2012 .bashrc~
drwx------    2 mattdmo  4096 Mar 24 20:03 bin/
drwxrwxr-x    2 mattdmo  4096 Mar 11 16:29 download/

for example. Taking the answers from this question gives me

dir | awk '{ total += $4 }; END { print total }'

which gives me the total, but doesn't print the directory listing itself. Is there a way to alter this into a one-liner or shell script so I can pass any ls arguments I want to dir and get a full listing plus sum total? For example, I'd like to run dir -R *.jpg *.tif to get the listing and total size of those file types in all subdirectories. Ideally, it would be great if I could get the size of each subdirectory, but this isn't essential.

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Why does't ls -lh help you ? It prints total sum in top. You can also run du -sh *.exe to get disk space usage information in human readable form. –  Naai Sekar Apr 16 '13 at 19:40
    
@ashwin I don't know what the 'total' ls -lh is printing, but it's not always related to what the awk scripts below calculate, or what I add up by hand. Sometimes it's close to the number of KB of files in the directory, but it doesn't seem to take the allocated sizes of subdirectories into effect. I'd be grateful if you could point me toward an explanation of what exactly that number is... –  MattDMo Apr 17 '13 at 17:05
    
see if my answer below works for you –  Naai Sekar Apr 17 '13 at 20:17
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5 Answers

up vote 4 down vote accepted

The following function does most of what you're asking for:

dir () { ls -FaGl "${@}" | awk '{ total += $4; print }; END { print total }'; }

... but it won't give you what you're asking for from dir -R *.jpg *.tif, because that's not how ls -R works. You might want to play around with the find utility for that.

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Simply print the current line that you are summing the total of:

dir | awk '{ print; total += $4 }; END { print "total size: ",total }'
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Adding the following to .bash_profile or .bashrc works for me.

dir ()
{
find . -iname "$@" -exec ls -lh {} \;
find . -iname "$@" -print0|xargs -r0 du -csh|tail -n 1;
}

Now when i do a dir *.mp3 it does recursively and prints total at the end. You can control how much depth you want by adding a maxdepth parameter to the find. I know running find twice is not a very effiecnt idea. But i couldnt think of a better way. Atleast it gets the job done.

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There's already a Linux command for this: du

Just do:

du -h /directory
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Does du work with file filters like *.exe, *.jpg etcetera –  vfclists Aug 30 '13 at 15:36
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Using du and a awk statement like the one mentioned above will provide what you are looking for.

Example: du /home/abc/Downloads/*.jpg | awk '{ print; total += $1 }; END { print "total size: ",total }'

This will list all files in folder Downloads of user abc ending in .jpg and prints the sum of all these files at the end of the listing.

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