Attempting to locate number of files of a particular extension on a SP 2010 farm

Question

Was doing some web searching to find the means to get a count of the number of files of a particular extension. My code is:
Get-SPSite -Limit All | Get-SPWeb -Limit All | Select -ExpandProperty Lists | Where { $_.GetType().Name -eq "SPDocumentLibrary" –and -not $_.Hidden } | Select -ExpandProperty Items | Where { $_.Name -Like "*.exe" } | Select Name, @{Name="URL";
Expression={$_.ParentList.ParentWeb.Url + "/" + $_.Url}} > d:\temp\exefound.txt
(all on one line)
I am running the sharepoint management console "as administrator".
The above script runs to completion without error - or results.
However, I know for certain that there are files of the "file.abc" extension.
Therefore, there is something I am missing here.
What improvements to the script can I make so that I get real results?
Thank you for your suggestions!

Answer 1

Well, this has been interesting. I did get the list of URLs that I needed from this script.
Then, of course, those to whom I was reporting had a more complex request - how many files are on the system with _any_ of the blocked file extensions.
So I did some research to see how I might modify the script. I turned your script above into this:
$SPwebApp = Get-SPWebApplication http://mysite
function EndsWithAny( [string]$s, [string[]]$items ) {
  $matchingItems = @($items | where { $s.EndsWith( $_ ) })
  [bool]$matchingItems
$BlockedExtensions = @(".adp",".app",".asa",".ashx",".asmx",".asp",
".bas",".bat",
".cdx","cer",".chm",".class",".cmd",".cnt",".com",".config",".cpl",".crt",".csh",
".der",".dll",
".exe",
".fxp",
".gadget",".grp",
".hlp",".hpj",".hta",".htr",".htw",
".ida",".idc",".idq",".ins",".isp",".its",
".jse",".json",
".ksh",
".lnk",
".mad",".maf",".mag",".mam",".maq",".mar",".mas",".mat",".mau",".mav",".maw",".mcf",
".mda",".mdb",".mde",".mdt",".mdw",".mdz",".msc",".msh",".msh1",".msh1xml",".msh2",".msh2xml",".mshxml",".msi",".msp",".mst",
".ops",
".pcd",".pif",".pl",".prf",".prg",".printer",".ps1",".ps1xml",".ps2",".ps2xml",".psc1",".psc2",".pst",
".reg",".rem",
".scf",".scr",".sct",".shb",".shs",".shtm",".shtml",".soap",".stm",".svc",
".url",
".vb",".vbe",".vbs",".vsix",
".ws",".wsc",".wsf",".wsh"
foreach ($SPsite in $SPwebApp.Sites)
    foreach ($web in $SPsite.AllWebs)
      $listCounter = $web.Lists.Count
      foreach ($list in $web.Lists)
        if($list.BaseType -eq "DocumentLibrary")
             foreach($item in $list.Items)
                if(EndsWithAny($item.Name, $BlockedExtensions) )
                    $web.Url + "/" + $item.Url  >>  d:\temp\exefound4.txt
When I ran the above - which isn't much different than yours - I get 0 results instead of the nearly 200 lines before. So it looks, to me, like there is some issue with this line of the above function:
  $matchingItems = @($items | where { $s.EndsWith( $_ ) })
When I try things from the command line, I see:
PS C:\Users\sa_spfarm> $s = "any.f"
PS C:\Users\sa_spfarm> $items = @( ".abc", ".f", "exe" )
PS C:\Users\sa_spfarm> $items | where { $s.EndsWith($_) }
.f
PS C:\Users\sa_spfarm>
So then I added some echos to the function:
function EndsWithAny( [string]$s, [string[]]$items ) {
  echo "items = $items"
  echo "s = $s"
  $matchingItems = @($items | where { $s.EndsWith( $_ ) })
  echo "matchingItems = $matchingItems"
  [bool]$matchingItems
Then I try to use the function:
PS C:\Users\sa_spfarm> $items
.abc
.f
exe
PS C:\Users\sa_spfarm> EndsWithAny( "abc.f", $items )
items =
s = abc.f System.Object[]
matchingItems =
False
PS C:\Users\sa_spfarm>
So, why is items empty inside the function? Notice that the function's arguments are $s and $items internal to the function; globally the $items is passed in and I would have expected it to be assigned to the internal variable.