Creating scriptblocks from string

Question

Here is what I am trying to get to work in a scriptblock

$scriptblock={
for /f "tokens=14" %i in ('"ipconfig | findstr IPv4"') do set ip=%i

nslookup %ip%
}

Everytime though I get

Exception calling "Create" with "1" argument(s): "At line:4 char:4 + for /f "tokens=14" %i in ('"ipconfig | findstr IPv4"') do set ip=%i + ~ Missing opening '(' after keyword 'for'. " At line:1 char:1 + $scriptblock=[scriptblock]::create($scriptblock) + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : ParseException

I have tried setting it to a here string first then using [scriptblock]::create(), but still get the same thing.

How do I get this into the scriptblock?

What are you trying to do? Getting your hostname? Why do you mix batch statements and PowerShell? — David Brabant
– David Brabant, Commented Sep 28, 2015 at 13:49
It is going to be run on a lot of server 2003 which may or may not have powershell. — CRad14
– CRad14, Commented Sep 28, 2015 at 17:16

Keith Hill · Accepted Answer · 2015-09-28 14:29:15Z

3

Don't try to mix batch and PowerShell commands. To get the IPv4 address try this:

$ip = (ipconfig | Foreach {if ($_ -match 'IPv4 address.*?:\s+(.*)') {$matches[1]}})[0]

Of if you are on Windows 8 or higher, you can use:

Get-NetIPAddress -AddressFamily IPv4 -AddressState Preferred

answered Sep 28, 2015 at 14:29

Keith Hill

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4 Comments

CRad14 Over a year ago

Sure, but this command is going to be run on several 2003 servers which may or may not have powershell....

Keith Hill Over a year ago

@CRad14 if a server doesn't have PowerShell, how do you expect it to recognize a PowerShell construct e.g. $scriptblock={...}?

CRad14 Over a year ago

I don't, but I will be using Invoke-VMscript to pass the contents of the scriptblock to the OS.

Keith Hill Over a year ago

Can you just use the -ScriptText parameter to pass text instead of a scriptblock?

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