Script to enumerate filesystem info for the volumes collected by metricbeat, which stopped working from version 7.11

readme.md

Metricbeat fails using version 7.11 when GetVolumeInformationW returns false, which it does for floppy and cd-rom volumes.

Example output from this script:

PS> get-volumeinformation.ps1
Drives found by GetLogicalDriveStringsW: A:\ C:\ D:\ L:\
GetVolumeInformationW for A:\ returned False
A:\ volume name:
A:\ filesystem name:
GetVolumeInformationW for C:\ returned True
C:\ volume name:
C:\ filesystem name: NTFS
GetVolumeInformationW for D:\ returned False
D:\ volume name:
D:\ filesystem name:
GetVolumeInformationW for L:\ returned True
L:\ volume name: Logs
L:\ filesystem name: NTFS

get-volumeinformation.ps1

$pinvokes = @'
[DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  [return: MarshalAs(UnmanagedType.Bool)]
  public extern static bool GetVolumeInformationW(
    string rootPathName,
    System.Text.StringBuilder volumeNameBuffer,
    int volumeNameSize,
    out uint volumeSerialNumber,
    out uint maximumComponentLength,
    out uint fileSystemFlags,
    System.Text.StringBuilder fileSystemNameBuffer,
    int nFileSystemNameSize);

[DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern uint GetLogicalDriveStringsW(uint nBufferLength, [Out] char[] lpBuffer);
'@
$Kernel32 = Add-Type -MemberDefinition $pinvokes -Name 'Kernel32' -Namespace 'Win32' -PassThru


$drives = [char[]]::new(512)
$Kernel32::GetLogicalDriveStringsW($drives.length, $drives) | out-null
$drives = (new-object System.String(,$drives))
$drives = $drives.Split("`0", [System.StringSplitOptions]::RemoveEmptyEntries)
Write-Host "Drives found by GetLogicalDriveStringsW: $drives"
$drives | %{
	$volumeNameBuffer = New-Object -TypeName "System.Text.StringBuilder"
	$fileSystemNameBuffer = New-Object -TypeName "System.Text.StringBuilder"
	$res = $Kernel32::GetVolumeInformationW($_, $volumeNameBuffer, 255, [ref]0, [ref]0, [ref]0, $fileSystemNameBuffer, 255)
	Write-Host "GetVolumeInformationW for $_ returned $res"
	Write-Host "$_ volume name: $($volumeNameBuffer.ToString())"
	Write-Host "$_ filesystem name: $($fileSystemNameBuffer.ToString())"
}