Hi, I am working on a script to find equal files.

A user has two directories (with subdirectories in each one). If there there are equal files in both directories the script should output that, with showing the Path. Any suggestions how I can accomplish that??

Greetz

Ice

Define equal.

Same Name?
Same Size?
Same MD5 Hash?

IF they have the same name and content then I want to out-file it.

If they have the same name but different content ( see it by size) then I want to have an extra out-file

 

Greetz

This is what I Hav so far

 

[string]$folder01 = "C:\OLDDATA"
[string]$folder02 = "C:\Ebeling"

$child_folder02 = $(get-childitem $folder02 -Recurse)

Write-Host "SideIndicator   FileName                   Path"
Write-Host "-------------   ------------------------   ------------------"
Compare-object -ReferenceObject $(get-childitem $folder01 -Recurse) -DifferenceObject $(get-childitem $folder02 -Recurse) -includeequal -PassThru -Property Name | Sort-Object -Property Name | foreach {
 # Process only files
 if ($_.mode -notmatch "d") {
  Write-Host $_.SideIndicator.toString().padright(15)$_.Name.tostring().padright(26)$_.FullName.tostring().padright(50)
  if ($_.SideIndicator -match "==") {
   $double_filename = $_.Name
   $child_folder02 | foreach {
    if ($double_filename -eq $_.Name) {
     Write-Host "                                          "$_.FullName
    }
   }
  }
 }
}

I just recommended Robocopy in a different post. The same here. Robocopy let's you do a directory comparison, sort of a practice copy. Using the /L parm causes it to compare two folders and log the results. That output can be captured in PowerShell.

$FileCompare = robocopy Dir1 Dir2 /E /L /IS /FP

This will cause robocopy to compare the folders and /IS tells robocopy to include files that are the same in the output. /FP option will output full pathname for each file. If you want to remove all the other files from the output you can use these additional parms.

/XC - eXclude Changed files.
/XN - eXclude Newer files.
/XO - eXclude Older files.
/XX - eXclude eXtra files and directories.
/XL - eXclude Lonely files and directories.

I have done several comparisons of these types and it has always been faster for me to use the combination then to try to do everything in Powershell. The memory requirements for loading up two giant directory structures can get out of hand pretty quick.

Bruce