Monthly Archives: June 2015

How Can I List Open Sessions and Open Files on a Computer?

I need to update frequently a piece of software on a set of servers. The software is updated just by copying new files into a directory. A piece of cake using Powershell.

The problem is that the directory is shared and users run the software from there – so when I try to copy new version of files over the old one, I’m told that some files are open and cannot be replaced. I need a way to find those open files and close them. I know it can be achieved using  Share and Storage Management console – but thats not scriptable.

I searched and found this Ed Wilsons’s post

How Can I List Open Sessions and Open Files on a Computer? – Hey, Scripting Guy! Blog – Site Home – TechNet Blogs.

and this script Jeffrey S. Patton’s mod-posh tools

I took the best bits off them and function looks as this

Function Get-OpenFiles
    Get a list of files open on the server
    This function returns a list of files open on a given server. The output is
    similar to that of the Manage Open Files from the Share and Storage Management
.PARAMETER ComputerName
    The NetBIOS or FQDN of the computer
    Get-OpenFiles -ComputerName fs

    User          Path                              LockCount
    ----          ----                              ---------
    User1         F:\Users\User1\Documents\Data\...         0
    User2         P:\Public                                 0

    Param (
        [string[]]$ComputerName = $env:COMPUTERNAME


        foreach ($c in $ComputerName) {
            $Server = [adsi]"WinNT://$($c)/LanmanServer"
            $Resources = $Server.PSBase.Invoke("Resources")
            foreach ($Resource in $Resources)
                    $prop = @{User = $Resource.GetType().InvokeMember("User","GetProperty",$null,$Resource,$null)
                                Path = $Resource.GetType().InvokeMember("Path","GetProperty",$null,$Resource,$null)
                                LockCount = $Resource.GetType().InvokeMember("LockCount","GetProperty",$null,$Resource,$null)
                                Computername = $c

                    $UserResource = New-Object -TypeName PSobject -Property @prop
                    #catch exception

                #return to output
} # end of function

I will test it and then add the possibility to close those open files….

Get list of all the junctions present on a disk volume

list of all the junctions present on a disk volume can be obtained by executing dir /aL /s C:\, where "C:" is the volume to scan

to create a junctions use mklink command as described in my other post Hardlinks, Junctions, Symlinks to files or folders

If you prefer Powershell (like me) then notice that since version 5 the commandlets New-Item, Remove-Item, Get-ChildItem support symbolic links


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