powershell.exe -ex bypass -command - powershell

I have a working powershell script, i Need to convert the entire script to run in single line of code with powershell.exe -ex bypass -command ....
The reason in the background is script should not run as .ps1 file instead i can run as single command. Am looking help in this... am quite new to powershell..but tried to manage the script below.. i need to convert it to run from command as single line of code..
# Config
$logFileName = "Application" # Add Name of the Logfile (System, Application, etc)
$path = "c:\Intel\" # Add Path, needs to end with a backsplash
# do not edit
$exportFileName = $logFileName + (get-date -f yyyyMMdd) + ".evt"
$logFile = Get-WmiObject Win32_NTEventlogFile | Where-Object {$_.logfilename -eq $logFileName}
$logFile.backupeventlog($path + $exportFileName)

You don't need -ex (short for -ExecutionPolicy) if you're not using a file, because it only applies to files.
To make it one line, you basically replace newlines with ;.
But -Command isn't the best idea for this. You're going to have to be careful about properly escaping all the quotes and pipes throughout your code.
You can look into -EncodedCommand, whereby you Base64 encode your code, and pass it all as one string.
If you check powershell.exe /? it has an example at the bottom:
# To use the -EncodedCommand parameter:
$command = 'dir "c:\program files" '
$bytes = [System.Text.Encoding]::Unicode.GetBytes($command)
$encodedCommand = [Convert]::ToBase64String($bytes)
powershell.exe -encodedCommand $encodedCommand
If you could explain more about your reasons for not wanting to use a file, it may be helpful in getting answers that are more appropriate for your situation.

Related

Multiline powershell function inside batch script

I want to run .bat-script which calls some powershell function inside it. Function is not so small, so I want to split it. But I cannot do it, escape symbols doesn`t help ( ` ,^).
Script example:
set file=%1
set function="$file=$Env:file; ^
$hash = CertUtil -hashfile $file SHA256 | Select -Index 1"
powershell -command %function%
You can leave the quote at the end of each line like so:
set file=%1
set function="$file=$Env:file; "^
"$hash = CertUtil -hashfile $file SHA256 | Select -Index 1; "^
"example break line further...."
powershell -command %function%
The ^ works as multiline character but it also escapes the first character, so also a quote would be escaped.
Do not mix batchfile syntax with PowerShell. As #Stephan mentioned $function= won't work in batch file. You need to use set function= instead. Let's say I want to execute the following:
Get-Process
Get-ChildItem
Then the code should look like this:
set function=Get-Process; ^
Get-ChildItem;
And you start PowerShell with:
powershell -noexit -command %function%
-noexit added so that you can verify that the code was successfully executed.
Also keep in mind that what you pass to PowerShell is batch multiline and in PowerShell it's visible as one line so you have to remember about semicolon (which you actually do but I'm leaving this comment here for future readers).
There's also another option how to pass variable from batch script to PowerShell. You can do it like this:
set name=explorer
set function=get-process $args[0]; ^
get-childitem
powershell -noexit -command "& {%function% }" %name%
Explanation:
$args[0] represents first argument passed to the scriptblock. To pass that argument, add %name% after the scriptblock while starting powershell. Also, as pointed out in this answer (credits to #Aacini for pointing this out in comments), you have to add & operator and keep your scriptblock inside curly brackets { }.
Sidenote: to be honest, I'd avoid running scripts like this. Much simpler way would be to just save the file as .ps1 and run this in your batch file:
powershell -noexit -file .\script.ps1

Pass whole script as argument to powershell.exe

I once found a script to easily change my Wallpaper if I use multiple ones.
set WshShell = WScript.CreateObject("WScript.Shell")
WshShell.SendKeys("^ ")
WshShell.SendKeys("+{F10}")
WshShell.SendKeys("n")
WshShell.SendKeys("{ENTER}")
However I need a separate link that calls the script.
Now I wonder if I can pass these multiple lines of code as parameter to powershell.exe directly.
I did read that I can allign multiple lines using ; and tried building the one-liner, however it doesn't run...or rather it does run, there is no feedback, nothing changes. If I paste the command line into a running powershell instance it just exits.
%SystemRoot%\system32\WindowsPowerShell\v1.0\powershell.exe -windowstyle hidden -Command "set WshShell = WScript.CreateObject('WScript.Shell'); WshShell.SendKeys('^ '); WshShell.SendKeys('+{F10}'); WshShell.SendKeys('n'); WshShell.SendKeys('{ENTER}')"
I basically just concatenated them and replaced the double quotes with single quotes to escape the special characters, so why does it not work as the separate script?
In PowerShell:
$WSH = New-Object -ComObject 'WScript.Shell'
$WSH.SendKeys('^ ')
$WSH.SendKeys('+{F10}')
$WSH.SendKeys('n')
$WSH.SendKeys('{ENTER}')
Save this as a script (Filename.ps1), and call it from a .bat or .cmd file:
%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\powershell.exe -File "path\filename.ps1"
Alternatively, as a one-liner in a command file:
%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\powershell.exe -Command "$WSH = New-Object -ComObject 'WScript.Shell';$WSH.SendKeys('\^ ');$WSH.SendKeys('+{F10}');$WSH.SendKeys('n');$WSH.SendKeys('{ENTER}')"

Capturing different streams in file

I'm trying to capture the Verbose, Error and other streams of a PowerShell script in a file. This to monitor the output of my script.
The following code works fine:
$LogFile = 'S:\ScriptLog.log'
$ScriptFile = 'S:\TestieScript.ps1'
powershell -Command $ScriptFile *>&1 > $LogFile
However, the moment I try to put a space in one of the file paths, it's no longer working. I tried a lot of things, like double quotes, single quotes, .. but no luck.
To illustrate, the following code doesn't work:
$LogFile = 'S:\ScriptLog.log'
$ScriptFile = 'S:\Testie Script.ps1'
powershell -Command $ScriptFile *>&1 > $LogFile
One person in this thread has the same issue.
Thank you for your help.
You're trying to run a file whose name contains a space as a command without proper quoting, so you're most likely getting an error like this in your log:
The term 'S:\Testie' is not recognized as the name of a cmdlet, function, script file, or operable program.
Either add proper quoting (and the call operator &, because your path is now a string):
powershell -Command "& '$ScriptFile'" *>&1 > $LogFile
or (better) use the -File parameter, as #CB. already suggested:
powershell -File $ScriptFile *>&1 > $LogFile
which has the additional advantage that the call will return the actual exit code of the script.
Edit: If you want to run the command as a scheduled task you'll need to use something like this:
powershell -Command "& 'S:\Testie Script.ps1' *>&1 > 'S:\ScriptLog.log'; exit $LASTEXITCODE"
because the redirection operators only work inside a PowerShell process.
try using -file parameter:
powershell -file $ScriptFile *>&1 > $LogFile

passing \ in argument to powershell script causes unexpected escaping

This is my powershell script test.ps1:
Write-Output $args;
Now suppose I have a batch script that calls this powershell script with all kinds of paths. One of those is c:\:
powershell -executionpolicy Bypass -file test.ps1 "c:\"
The output is:
c:"
Is there any way to quote my arguments such that c:\ would actually be taken and stored as is in the $args[0] variable? I know I can solve this quick'dirty by passing "c:\\", but that's not a real solution.
EDIT: using named parameters in test.ps1 doesn't make any difference:
[CmdletBinding()]
param(
[string]$argument
)
Write-Output $argument;
EDIT2: using a batch file instead works fine.
My test.bat script:
echo %~1
I run it:
test.bat "c:\"
Returns nicely:
c:\
Are you sure this comes form powershell and not from the program which invokes your statement? The backslash is no escape code in powershell.
my test.ps1 is working, when run from ise.
this works for me:
powershell -executionpolicy Bypass -command "test.ps1 -argument 'C:\'"
(end with quote double-quote)
Help file for PowerShell.exe says:
File must be the last parameter in the command, because 'all characters' typed after the file parameter name are "interpreted" as the script file path followed by the script parameters.
You are against Powershell.exe's command line parser, which uses "\" to escape quotes. Do you need quotes? Not in your case:
powershell -file test.ps1 c:\
prints
c:\
Similarly, this works too
powershell -file test.ps1 "c:\ "
c:\
but then your arg has that extra space which you would want to trim. BTW, Single quotes do not help here:
powershell -file test.ps1 'c:\'
'c:\'
If you need the final backlash to be passed to the command, you can use
$ArgWithABackslashTemp = $ArgWithABackslash -replace '\\$','\\'
&$ExePath $ArgWithABackslashTemp
Or, if the exe is smart enough to handle it without the trailing backslash
&$ExePath $ArgWithABackslash.trim('\')

PowerShell: Start a process with unquoted arguments

My PowerShell script should start an external executable with specified parameters. I have two strings: The file name, and the arguments. This is what process starting APIs usually want from me. PowerShell however fails at it.
I need to keep the executable and arguments in a separate strings because these are configured elsewhere in my script. This question is just about using these strings to start the process. Also, my script needs to put a common base path in front of the executable.
This is the code:
$execFile = "SomeSetup.exe"
$params = "/norestart /verysilent"
& "$basePath\$execFile" $params | Out-Host
# Pipe to the console to wait for it to finish
This is the actual result (does not work with this program):
Process file name: "C:\My\Base path\SomeSetup.exe"
Process command line: "/norestart /verysilent"
This is what I'd expect to have (this would work):
Process file name: "C:\My\Base path\SomeSetup.exe"
Process command line: /norestart /verysilent
The problem is that the setup recognises the extra quotes and interprets the two arguments as one - and doesn't understand it.
I've seen Start-Process but it seems to require each parameter in a string[] which I don't have. Splitting these arguments seems like a complicated shell task, not something I'd do (reliably).
What could I do now? Should I use something like
& cmd /c "$execFile $params"
But what if $execFile contains spaces which can well happen and usually causes much more headache before you find it.
You can put your parameters in an array:
$params = "/norestart", "/verysilent"
& $basepath\$execFile $params
When you run a legacy command from Powershell it has to convert the powershell variables into a single string that is the legacy command line.
The program name is always enclosed in quotes.
Any parameters that contain a space character are enclosed in double
quotes (this is of course the source of your problem)
Each element of an array forms a separate argument.
So given:
$params = "/norestart /verysilent"
& "$basePath\$execFile" $params
Powershell will run the command:
"\somepath\SomeSetup.exe" "/norestart /verysilent"
The solution is to store separate arguments in an array:
$params = "/norestart","/verysilent"
& "$basePath\$execFile" $params
will run:
"\somepath\SomeSetup.exe" /norestart /verysilent
Or if you already have a single string:
$params = "/norestart /verysilent"
& "$basePath\$execFile" ($params -split ' ')
will work as well.
$execFile = "SomeSetup.exe"
$params = "/norestart /verysilent"
Invoke-Expression ($basePath + "\" + $execFile + " " +$params)
Try it this way:
& $execFile /norestart /verysilent
Bill
Just use single quotes:
$execFile = "SomeSetup.exe"
$params = "/norestart /verysilent"
& "'$basePath\$execFile' $params" | Out-Host
# Pipe to the console to wait for it to finish
Also I would use join-path instead of concatenating the two strings:
$path = Join-Path $basePath $execFile
& "$path $params" | out-host