I need to write a Powershell one-liner to do a complex task. I need it to be strictly one line because I want to run it in a Go and Python script. The task requires taking the output of the first command and use it as a parameter in the second command.
I thought it was a simple task but I am struggling with it quite a bit. For example, the below command does not work:
$obj = Get-Item . | Get-Item $obj.Root | Format-List *
Get-Item : The input object cannot be bound to any parameters for the command either because the command does not take
pipeline input or the input and its properties do not match any of the parameters that take pipeline input.
At line:1 char:21
+ $obj = Get-Item . | Get-Item $obj.Root | Format-List *
+ ~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (C:\Users\fhcat:PSObject) [Get-Item], ParameterBindingException
+ FullyQualifiedErrorId : InputObjectNotBound,Microsoft.PowerShell.Commands.GetItemCommand
What am I doing wrong?
Strictly one line sounds like a personal preference rather than a technical requirement.
However, you can end a statement with a semicolon or process the input via ForEach-Object
$obj = Get-Item .; Get-Item $obj.Root | Format-List *
or
Get-Item . | ForEach-Object {Get-Item $_.Root} | Format-List *
Related
I'm trying to create a Powershell script that prints out only certain AD groups from the Folder Permission settings. However for some reason Powershell doesn't recognize StartsWith function.
("C:\folder" | get-acl).Access | ForEach-Object { if (($_.IdentityReference).StartsWith("sl_test")) { continue }; $_ }
When I run this I got errors similar to this for every foreach object:
Method invocation failed because [System.Security.Principal.NTAccount] does not contain a method named 'StartsWith'.
At C:\temp\test.ps1:1 char:56
+ ("C:\folder" | get-acl).Access | ForEach-Object { if (($_.IdentityReference).St ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound
Any suggestions on how to get this to work?
IdentityReference is a [System.Security.Principal.NTAccount]according to your error message.
But .StartWith is a method on the String type. If you call a method, Powershell does no magic for you, AFAIK.
Try ... ($_.IdentityReference) -match "^sl_test" ..., which should do the implicit string conversion.
If you want the string representation of an IdentityReference (regardless of whether it's and NTAccount object or a SID), you can reference the Value property:
$_.IdentityReference.Value.StartsWith('sl_test')
Try:
Get-Acl -Path "C:\folder" | Select-Object -ExpandProperty Access | Where-Object {$_.IdentityReference -like "sl_test*" }
You can customize the output with an additional | Select-Object -Property XY
I'm attempting to get the number of lines in all files in my directory. I've tried using some kind of variable I set to 0 and looping through all the files and getting their line number.
> $i=0;ls | foreach{$i += [int](get-content $_ | measure-object -line)};$i
However, every time I try adding it to the variable I set to 0, it shoots out an odd error:
Cannot convert the "Microsoft.PowerShell.Commands.TextMeasureInfo" value of type
"Microsoft.PowerShell.Commands.TextMeasureInfo" to type "System.Int32".
At line:1 char:19
+ $i=0;ls | foreach{$i += [int](get-content $_ | measure-object -line)};$i
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [], RuntimeException
+ FullyQualifiedErrorId : ConvertToFinalInvalidCastException
Why does this operation not work and how could it be resolved?
Is there a quicker way of obtaining the number of lines in all files in a directory?
You need to get the Lines:
$i=0;ls -File | foreach{$i += [int](get-content $_ | measure-object -line).Lines};$i
I've also added the -File switch to ls/gci to only get the content of files.
Version with aliases expanded:
$i=0;Get-ChildItem -File | ForEach-Object {$i += [int](Get-Content $_ | Measure-Object -line).Lines};$i
Firstly,
I am very new to powershell. Everytime I think i get the logic i go WTF.. If this was bash it would be so easy etc..
what am I trying to do exactly ...
Get all computers from AD that Meet the Xiopwb* criteria. Once i have the list I need to change the permissions on the \\Xiopwb20\Nsiwebroot Directory to ONLY INCLUDE Domain Administrators and A Security group "webadmins"
My Logic:
Get all computers from AD that meet Xio*PWB*
Take just the NAME of objects in that list
for ever "name" in that list do Get-ACL \\Name from list\Nsiwebroot
remove *
add user / group.
What I have:
PS C:\Windows\system32> Get-ADComputer -filter * | Where-Object {$_.Name -like "xiopwb*"} | Select Name | ForEach-Object { Get-Acl \\$_.Name\nsiwebroot}
all up to the "ForEach" works... I get just the names of the PC's that I need etc..
Simple as possible I don't need a 100 line script.
Thanks
** update **
it is double \ its just not showing it... no idea why
Looks like it is doing what I want to a degree. However its spitting out the format funky. #{Name=XIOPWB09}
PS C:\Windows\system32> Get-ADComputer -filter * | Where-Object {$_.Name -like "xiopwb*"} | Select Name | ForEach-Object {get-acl "\\$_\D$\nsiwebroot"}
get-acl : Cannot find path '\#{Name=XIOPWB09}\D$\nsiwebroot' because it does not exist.
At line:1 char:99
+ ... opwb*"} | Select Name | ForEach-Object {get-acl "\$_\D$\nsiwebroot"}
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (:) [Get-Acl], ItemNotFoundException
+ FullyQualifiedErrorId : GetAcl_PathNotFound_Exception,Microsoft.PowerShell.Commands.GetAclCommand
get-acl : Cannot find path '\#{Name=XIOPWB06}\D$\nsiwebroot' because it does not exist.
At line:1 char:99
+ ... opwb*"} | Select Name | ForEach-Object {get-acl "\$_\D$\nsiwebroot"}
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (:) [Get-Acl], ItemNotFoundException
+ FullyQualifiedErrorId : GetAcl_PathNotFound_Exception,Microsoft.PowerShell.Commands.GetAclCommand
"Select Name" returns an Object with Table Header Name. "Select -ExpandProperty Name" is What needed here, which will convert it o String.
Regards,
kvprasoon
I am very new to powershell and writing a script which will go to each computer in windows domain and get the size of a user profile. I have tried below on a powershell script
$profileDir = "\\$computerName\c$\users\userProfile"
$fullProfile = (Get-ChildItem $profileDir -recurse -force | Measure-Object -property length -sum)
But on some computer it gives below error. The problem seems that some directories on the profile have a long path and get-ChildItem fails
Get-ChildItem : The specified path, file name, or both are too long. The fully
qualified file name must be less than 260 characters, and the directory name mu
st be less than 248 characters.
At C:\scripts\powershell\profiles.ps1:56 char:30
+ $fullProfile = (Get-ChildItem <<<< $profileDir -recurse -force | Measure-Obj
ect -property length -sum)
+ CategoryInfo : ReadError: (\\computerName...nt.IE5\RQT4K4JU:St
ring) [Get-ChildItem], PathTooLongException
+ FullyQualifiedErrorId : DirIOError,Microsoft.PowerShell.Commands.GetChil
dItemCommand
##########################################################################################################################
At this point I tried using du.exe (diskusage) from SysInternals which works fine but I don't know how to take the output of du into a variable. I have below on my script
$dirSize = .\du.exe -c c:\temp |convertFrom-csv | select-object DirectorySize
write-host $dirSize
The output is
PS C:\scripts\powershell> .\profiles.ps1
#{DirectorySize=661531}
What I want the output to be like
PS C:\scripts\powershell> .\profiles.ps1
661531
What you have is a hashtable. You need to reference the item in that hashtable to get it's value. Instead of:
Write-Host $dirSize
Try:
$dirSize['DirectorySize']
Given the following snippet
$drives = Get-PSDrive
foreach($drive in $drives)
{
Write-Host $drive.Name "`t" $drive.Root
Write-Host " - " $drive.Free "`t" $drive.PropertyDoesntExist
}
The drive.PropertyDoesntExist property doesn't... erm... exist so I would expect an error to be thrown but instead it returns a null.
How can I get errors or exceptions?
EDIT - Me bad - I asked 2 questions in one so I moved one into a separate question.
The NextHop Blog provides a good solution to this problem. It doesn't give you an error, but instead a boolean. You can use Get-Member to get a collection of all of the real properties of the object's type and then match for your desired property.
Here's an example for strings:
PS C:\> $test = "I'm a string."
PS C:\> ($test | Get-Member | Select-Object -ExpandProperty Name) -contains "Trim"
True
PS C:\> ($test | Get-Member | Select-Object -ExpandProperty Name) -contains "Pigs"
False
If you explicitly want an error, you may want to look into Set-Strictmode as Set-StrictMode -version 2 to trap non-existent properties. You can easily turn it off when you're done with it, too:
PS C:\> Set-StrictMode -version 2
PS C:\> "test".Pigs
Property 'Pigs' cannot be found on this object. Make sure that it exists.
At line:1 char:8
+ "test". <<<< Pigs
+ CategoryInfo : InvalidOperation: (.:OperatorToken) [], RuntimeException
+ FullyQualifiedErrorId : PropertyNotFoundStrict
PS C:\> Set-StrictMode -off