Question

Escaping chars in powershell is just silly. I’ve tried everything I can find to try and escape this pipe in a parameter that I’m passing into a powershell script, but I absolutely cannot escape it. It’s nuts. I make sure to pass the param in single quotes, and have tried all of the powershell/windows escape chars (`,“,\,\,^,^^). Any help is greatly appreciated.

Example of test script:

$cmd = $Args[0] #set first parameter received to $cmd to run with Invoke-Expression (must wrap param in single quotes if it contains spaces)  
write-host $cmd

Calling test script with a pipe containing command:

C:\Windows\System32\cmd.exe /c powershell -executionPolicy Unrestricted -InputFormat none "D:\test_powershell\app\test_wrapper.ps1" 'test1 | test2'

Results:

'test2'' is not recognized as an internal or external command,
operable program or batch file.

Answer 1

A few notes:

1. You don’t need cmd. Just call PowerShell directly.
2. -InputFormat can be either Text or XML. None is not a valid value here.

3. Use the following (which is mentioned in the help too if escaping issues arise):

   powershell "&{ &'D:\test_powershell\app\test_wrapper.ps1' 'test 1 | test2' }"