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  1. # AutoMount.psm1 v1.0  
    2. \
  2. # Oisin "x0n" Grehan (MVP)  
    3. \
  3.  
    4. \
  4. $query = new-object System.Management.WqlEventQuery  
    5. \
  5. $query.EventClassName = "__InstanceOperationEvent"  
    6. \
  6.  
    7. \
  7. # default to every 2 seconds  
    8. \
  8. $query.WithinInterval = new-object System.TimeSpan 0,0,2  
    9. \
  9.  
    10. \
  10. # this WMI is only available with Windows 2003 and Vista (not XP it appears).
    11. \
  11. # this could be rewritten to use different WMI queries to support 2000/NT/XP also.  
    12. \
  12. $query.QueryString = "Select * from Win32_VolumeChangeEvent"  
    13. \
  13.  
    14. \
  14. # attach a watcher  
    15. \
  15. $watcher = new-object System.Management.ManagementEventWatcher $query  
    16. \
  16.  
    17. \
  17. # here we use -SupportEvent instead of -SourceIdentifier  
    18. \
  18. # this prevents this event from being generally visible  
    19. \
  19. # also note the use of the call operator to invoke a    
    20. \
  20. # function in the scope of the module since this action  
    21. \
  21. # occurs outside of module scope.  
    22. \
  22. Register-ObjectEvent $watcher -EventName "EventArrived" `  
    23. \
  23.     -SupportEvent "WMI.VolumeChange" -Action {  
    24. \
  24.         & (get-module automount) VolumeChangeCallback @args  
    25. \
  25.     }  
    26. \
  26.  
    27. \
  27. # New PSEvents:  
    28. \
  28. #  
    29. \
  29. #     PowerShell.DeviceConfigurationChanged  
    30. \
  30. #     PowerShell.DeviceArrived  
    31. \
  31. #     PowerShell.DeviceRemoved  
    32. \
  32. #     PowerShell.DeviceDocking  
    33. \
  33.  
    34. \
  34. # win32_volumechangeevent event types  
    35. \
  35. $eventTypes = @{  
    36. \
  36.     1 = "ConfigurationChanged";  
    37. \
  37.     2 = "Arrived";  
    38. \
  38.     3 = "Removed";  
    39. \
  39.     4 = "Docking";  
    40. \
  40. }  
    41. \
  41.  
    42. \
  42. # private module level callback function  
    43. \
  43. function VolumeChangeCallback ($sender, $eventargs) {  
    44. \
  44.     trap { write-warning $_ }  
    45. \
  45.  
    46. \
  46.     $driveName = $eventArgs.NewEvent.DriveName.TrimEnd(":")  
    47. \
  47.     $eventType = [int]$eventArgs.NewEvent.EventType # was uint16  
    48. \
  48.  
    49. \
  49.     $forwardedEvent = "Device$($eventTypes[$eventType])"  
    50. \
  50.        
    51. \
  51.     # forward a new simpler event specific to device event type  
    52. \
  52.     [void]( New-PSEvent "PowerShell.$forwardedEvent" -Sender $driveName `  
    53. \
  53.         -EventArguments $eventargs )  
    54. \
  54. }  
    55. \
  55.  
    56. \
  56. # hook up our psdrive mount / unmount events  
    57. \
  57. # and start the WMI watcher  
    58. \
  58. function Enable-AutoMount {  
    59. \
  59.  
    60. \
  60.     Register-PSEvent -SourceIdentifier "PowerShell.DeviceArrived" `  
    61. \
  61.         -Action {              
    62. \
  62.             new-psdrive -name $args[0] -psprovider `  
    63. \
  63.                 filesystem -root "$args[0]:";  
    64. \
  64.          }  
    65. \
  65.  
    66. \
  66.     Register-PSEvent -SourceIdentifier "PowerShell.DeviceRemoved" `  
    67. \
  67.         -Action {  
    68. \
  68.             remove-psdrive -name $args[0] -ea 0; # may not exist  
    69. \
  69.         }  
    70. \
  70.        
    71. \
  71.     $watcher.Start()  
    72. \
  72. }  
    73. \
  73.  
    74. \
  74. # tear down our psdrive mount / unmount events  
    75. \
  75. # and stop the WMI watcher  
    76. \
  76. function Disable-AutoMount {  
    77. \
  77.  
    78. \
  78.     Unregister-PSEvent -SourceIdentifier "PowerShell.DeviceArrived"  
    79. \
  79.     Unregister-PSEvent -SourceIdentifier "PowerShell.DeviceRemoved"  
    80. \
  80.        
    81. \
  81.     $watcher.Stop()  
    82. \
  82. }  
    83. \
  83.  
    84. \
  84. # export functions to control automount  
    85. \
  85. Export-ModuleMember Enable-AutoMount, Disable-AutoMount  
    86. \
  86.  
    87. \
  87. # start watching and (un)mounting  
    88. \
  88. Enable-AutoMount
    89. \
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