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Monday, January 09, 2006


Report MP3 count and size by User from MSH

This script will scan a local or remote disk for MP3 files, uses a Regex to extract the user from the Path, and than groups them by user to generate a Summary Report like this :

Report for MP3 files on .
Drive: G:

Number of MP3 files

Total Size (MB)

Max size (MB)

MP3 Per User

User Count MB
---- ----- --
Usr001 141 998,52
Usr002 547 3746,62

the first part of the script (getting the list, and making the summary I did real quick)

an interesting is the convering to MB part, I'm using the .... (oops, how are they called) that MSH has defined for Binary Numbers, K = KiloByte etc., you can use them as a number.




very handy.

but then I wanted to sort them by user, the username was in the path.
it was pretty easy to get them out using a regex but how to select on that.

Select-object lets you use expressions in the statement, but I got stuck here.

$mp | select { 
$_.name;($re.Match($_)).groups[1].value;[math]::round(($_.filesize / 1m) , 2
MSH C:\WINDOWS\system32> $mp | select {
$_.name;($re.Match($_)).groups[1].value;[math]::round(($_.filesize / 1m) , 2

$_.name;($re.Match($_)).groups[1].value;[math]::round(($_.filesize / 1m) , 2 )
{g:\userdata\home\User1\data\dikkie dik.mp3, User1, 2.06}

my properties where melted together and the values not realy usable anymore.
(I managed to fix the "melting" by splitting the scriptblock, but I already got a better solution : )

but again the NG quickly provided an answer, Keith Hill showed me the use of the "Expression=" - statement/structure to format the Calculated Properties.

so Now I can easy format and name the Calculated properties in Monad so the scriptproperties are much more usable after that.

I make a list with al the userdata needed for the Usage per user summary and place it in the $UserList with this method,

After that I group the $userfiles data by username, and then for every user I use the Group property (Created by the Group statement ) to create the Count and MB value again with the same method.

the final script looks like this :

$computer = "."
$drive = "G:"
$Extension = "MP3"

# RegExfilter for extracting Username from Path

$re = new regex("\\(usr.*?)\\")

# Seach the Files

$files = get-wmiobject -computer $computer cim_datafile -filter "Drive = '$drive' AND Extension = '$Extension'" 

# Summary 

"`nReport for $Extension files on $Computer`nDrive: $drive "
"`nNumber of $Extension files"
($files | Measure-Object ).count

"`nTotal Size (MB)"
[math]::round(($files | Measure-Object -property filesize -sum).sum / 1m , 2 )

"`nMax size (MB)"
[math]::round(($files | Measure-Object -property filesize -max).max / 1m , 2 ) 

# make list of MP3 with UserName extracted from path by Regex 

$Userfiles = $files | select @{expression={$_.filename}; name="Filename"},
             @{expression={[math]::round(($_.filesize / 1m) , 2 )}; name="RoundedSize"},
             @{expression={($re.Match($_)).groups[1].value}; name="UserName"}

# group them per user 

"`n$Extension Per User"
$Userfiles | group Username | select @{expression={$_.Name};Name="User"},
                               @{expression={($_.group | measure-object).count};Name="Count"},
                               @{expression={($_.group | measure-object -property RoundedSize -sum).sum};Name="MB"}

You can see how powerfull the usage of Select-Object, Measure-Object and Group-Object are Combined with the "Expression=" structure to name the generated properties.


Greetings /\/\o\/\/

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Blogger DontBotherMeWithSpam
Did you write this script to monitor on which user in your company is downloading MP3's you like? :)

I have been wondering when you were going to blog that script. Great stuff~
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