I recently started using Powershell and I'm trying out some code.
I have a .cfg file with several rules of code. The code is written like this:
ad.name=1
ad.virtual=active
ad.set=none
ad.partition=78
Now I want to export the value of ad.partition, which is 78, to a new file. I don't want to export ad.partition or = but only the number 78.
So far I got this:
Get-Content -Path C:\file.cfg | Where-Object {$_ -like 'ad.partition=78'}
But then I -obviously- just get the variable and the value. Not sure how to continue...
I hope someone has a way of achieving what I want.
After saving the value in a new file, would it be possible to add spaces? For example, the value consists out of 9 digits, e.g. 123456789. The desired output result would be 123 456 789.
Use ConvertFrom-StringData cmdlet to create a hash table from your file, then simply index the key you are after:
$h=(Get-Content -Path C:\file.cfg | ConvertFrom-StringData)
$h.("ad.partition") -replace ('^(\d{1,3})(\d{1,3})?(\d{1,3})?','$1 $2 $3') > C:\out.cfg
You can use the Select-String cmdlet to capture your desired value using a regex. Then just pipe the result to the Out-File cmdlet. To get your desired output with spaces, you can use a simple format string:
"{0:### ### ###}" -f [int](Select-string 'ad\.partition=(.*)' -Path C:\file.cfg).Matches.Groups[1].Value |
Out-File C:\result.cfg
Related
I have a Commands.csv file like:
| Command |
| -----------------------------------------------|
|(Get-FileHash C:\Users\UserA\Desktop\File1).Hash|
|(Get-FileHash C:\Users\UserA\Desktop\File2).Hash|
|(Get-FileHash C:\Users\UserA\Desktop\File3).Hash|
Header name is "Command"
My idea is to:
Use ForEach ($line in Get-Content C:\Users\UserA\Desktop\Commands.csv ) {echo $line}
Execute $line one by one via powershell.exe, then output a result to a new .csv file - "result.csv"
Can you give me some directions and suggestions to implement this idea? Thanks!
Important:
Only use the technique below with input files you either fully control or implicitly trust to not contain malicious commands.
To execute arbitrary PowerShell statements stored in strings, you can use Invoke-Expression, but note that it should typically be avoided, as there are usually better alternatives - see this answer.
There are advanced techniques that let you analyze the statements before executing them and/or let you use a separate runspace with a restrictive language mode that limits what kinds of statements are allowed to execute, but that is beyond the scope of this answer.
Given that your input file is a .csv file with a Commands column, import it with Import-Csv and access the .Commands property on the resulting objects.
Use Get-Content only if your input file is a plain-text file without a header row, in which case the extension should really be .txt. (If it has a header row but there's only one column, you could get away with Get-Content Commands.csv | Select-Object -Skip 1 | ...). If that is the case, use $_ instead of $_.Commands below.
To also use the CSV format for the output file, all commands must produce objects of the same type or at least with the same set of properties. The sample commands in your question output strings (the value of the .Hash property), which cannot meaningfully be passed to Export-Csv directly, so a [pscustomobject] wrapper with a Result property is used, which will result in a CSV file with a single column named Result.
Import-Csv Commands.csv |
ForEach-Object {
[pscustomobject] #{
# !! SEE CAVEAT AT THE TOP.
Result = Invoke-Expression $_.Commands
}
} |
Export-Csv -NoTypeInformation Results.csv
I am new to PowerShell, and I have the following example code and output to illustrate my problem:
select-string "$env:appdata\..\Local\test\*.ini" -pattern "example_adjustment=" | select filename, line | sort-object -property line -Descending >> file.txt
Filename Line
-------- ----
test1.ini example_adjustment="4.2"
test4.ini example_adjustment="11.0000000"
test2.ini example_adjustment="1.20"
test5.ini example_adjustment="0.90"
test3.ini example_adjustment="0.90"
I want to be able to modify the output so that the "Line" values appear as their numbers only and in float format for the purpose of the sort performing correctly. The end result is I'd be appending that information to a text file.
How would I go about modifying the Line property? I saw a post about regex, but I cannot edit directly from the pipe using regex it seems.
I cannot edit directly from the pipe using regex it seems.
You most certainly can! :-)
Use the -replace regex operator inside a calculated property:
... |Select filename,#{Name='Line';Expression={$_.Line -replace 'example_adjustment="([^"]*)"','$1'}}
I have a csv file that contains fields with values that begin with "$" that are representative of variables in different powershell scripts. I am attempting to import the csv and then replace the string version of the variable (ex. '$var1') with the actual variable in the script. I have been able to isolate the appropriate strings from the input but I'm having difficulty turning the corner on modifying the value.
Example:
CSV input file -
In Server,Out Server
\\$var1\in_Company1,\\$var2\in_Company1
\\$var1\in_Company2,\\$var2\in_Company2
Script (so far) -
$Import=import-csv "C:\temp\test1.csv"
$Var1="\\server1"
$Var2="\\server2"
$matchstring="(?=\$)(.*?)(?=\\)"
$Import| %{$_ | gm -MemberType NoteProperty |
%{[regex]::matches($Import.$($_.name),"$matchstring")[0].value}}
Any thoughts as to how to accomplish this?
The simplest way to address this that I could think of was with variable expansion as supposed to replacement. You have the variables set in the CSV so lets just expand them to their respective values in the script.
# If you dont have PowerShell 3.0 -raw will not work use this instead
# $Import=Get-Content $path | Out-String
$path = "C:\temp\test1.csv"
$Import = Get-Content $path -Raw
$Var1="\\server1"
$Var2="\\server2"
$ExecutionContext.InvokeCommand.ExpandString($Import) | Set-Content $path
This will net the following output in $path
In Server,Out Server
\\\\server1\in_Company1,\\\\server2\in_Company1
\\\\server1\in_Company2,\\\\server2\in_Company2
If the slashes are doubled up here and you do not want them to be then just change the respective variable values in your script of the data in the CSV.
Caveat
This has the potential to execute malicious code you did not mean too. Have a look at this thread for more on Expanding variables in file contents. If you are comfortable with the risks then this solution as presented should be fine.
Maybe I misunderstood, but do you need this?
$Import=import-csv "C:\temp\test1.cvs"
$Var1="\\server1"
$Var2="\\server2"
Foreach ($row in $Import )
{
$row.'In Server' = ($row.'In Server' -replace '\\\\\$var1', "$var1")
$row.'Out Server' = ($row.'Out Server' -replace '\\\\\$var2', "$var2")
}
$import | set-content $path
I am sorting a large directory of files and I am trying to select individual lines from the output of an ls command and show those only, but I get weird results and I am not familiar enough with powershell to know what I'm doing wrong.
this approach works:
ls > data.txt
select-string 2012 data.txt
rm data.txt
but it seems wasteful to me to create a file just to read the data that I already have to fill into the file. I want to pipe the output directly to select-string.
I have tried this approach:
ls | select-string 2012
but that does not give me the appropriate output.
My guess is that I need to convert the output from ls into something select-string can work with, but I have no idea how to do that, or even whether that is actually the correct approach.
PowerShell is object-oriented, not pure text like cmd. If you want to get fileobjects(lines) that were modified in 2012, use:
Get-ChildItem | Where-Object { $_.LastWriteTime.Year -eq 2012 }
If you want to get fileobjects with "2012" in the filename, try:
Get-ChildItem *2012*
When you use
ls | select-string 2012
you're actually searching for lines with "2012" INSIDE every file that ls / get-childitem listed.
If you really need to use select-string on the output from get-childitem, try converting it to strings, then splitting up into lines and then search it. Like this:
(Get-ChildItem | Out-String) -split "`n" | Select-String 2012
I found another simple way to convert objects to strings:
Get-ChildItem | Out-String -stream | Select-String 2012
in this very interesting article:
http://blogs.msdn.com/b/powershell/archive/2006/04/25/how-does-select-string-work-with-pipelines-of-objects.aspx
If you wanted Select-String to work on the Monad formatted output, you'll need to get that as a string. Here is the thing to grok about
our outputing. When your command sequence emits a stream of strings,
we emit it without processing. If instead, your command sequence
emits a stream of objects, then we redirect those objects to the
command Out-Default. Out-Default looks at the type of the object and
the registered formating metadata to see if there is a default view
for that object type. A view defines a FORMATTER and the metadata for
that command. Most objects get vectored to either Format-Table or
Format-List (though they could go to Format-Wide or Format-Custom).
THESE FORMATTERS DO NOT EMIT STRINGS! You can see this for yourself
by the following: "These formating records are then vectored to an
OUT-xxx command to be rendered into the appropriate data for a
particular output device. By default, they go to Out-Host but you can
pipe this to Out-File, Out-Printer or Out-String. (NOTE: these
OUT-xxx commands are pretty clever, if you pipe formating objects to
them, they'll render them. If you pipe raw object to them, they'll
first call the appropriate formatter and then render them.)
I am a little new to PowerShell, so this is probably a basic question.
I have written a small one-liner to remove the first 97 lines from the top of each text file in a directory.
The script works in as far as removing the line, but the new file created at the end doesn't have the name I expected. Here is the script:
Get-ChildItem | ForEach-Object {Get-Content $_.PSPath | Select -Skip 97 | Set-Content "Edited-$_.PSChildName" }
The original file is called:
file.txt
What I expect the new file to be called is:
Edited-file.txt
The file actually comes out as:
Edited-file.txt.PSChildName
Any idea what I am doing wrong?
I think you want Set-Content "Edited-$($_.PSChildName)". The $() allows you to interpolate expressions into strings e.g. "abc$(2+2)" returns the string "abc4".