This last week I had the privilege of speaking at the PowerShell Summit Asia in Singapore. After an 11 hour day of speaking, you better believe that I had a lot of attendees asking me questions over the following 2 days. A really good one that stuck in my head involves how to see the code that was used to write a cmdlet. Hey, I teach PowerShell so this is a good one.
PowerShell cmdlets are actually either a “cmdlet” or a “function”.
PS C:\> Get-Command -Name Get-Process, Get-SMBShare
CommandType Name Version Source
----------- ---- ------- ------
Cmdlet Get-Process 126.96.36.199 Microsoft.PowerShell.Management
Function Get-SmbShare 188.8.131.52 smbshare
Cmdlets are actually created from C# while functions are created with PowerShell. Since C# is compiled we cannot crack them open to see what makes them tick without some extra software. However, you can very easily see the code from a function
PS C:\> Get-Command -Name Get-SMBShare | Select-Object -ExpandProperty ScriptBlock | Out-File -FilePath ##Someplace to put it "
Set the –FilePath to a txt or PS1 file so you can look at the code.
It is no secret that I advocate to practice of “never reinvent the wheel”. In other words if you need to know how a function did something, just look at the code.