I have a problem with my script.
I want to create a variable from 2 variables and then echo the result
$a = "server1"
$server_server1 = "Success"
echo ("`$server_$a")
The result of the echo should by Success
Thx in advance
You can use the Get-Variable Cmdlet:
(get-variable "server_$a").Value
Which from your example, will give you Success.
See TechNet for more information on Get-Variable
short way to accomplish same result:
iex "`$server_$a"
Related
Hello all and thanks for your time in advance;
I'm running into a slight issue.
I'm running a command and piping it into a variable so i can manipulate the output.
$variable = some command
this normally works fine but doesn't output what's happening to the screen, which is fine most of the time. However occasionally this command requires some user input (like yes or no or skip for example), and since it's not actually piping anything to the command window, it just sits there hanging instead of prompting the user. If you know what to expect you can hit y or n or s and it'll proceed normally.
Is there anyway to run the command so that the output is piped to a variable AND appears on screen? I've already tried:
($variable = some command)
I've also tried:
write-host ($variable = some command)
But neither work. Note that the command running isn't a native windows or shell command and I cannot just run it twice in a row.
To clarify (because i probably wasn't clear)
I've also tried :
$variable = some command : Out-host
and
$variable = some command | out-default
with all their parameters, But the "prompt" from the command (to write y, n, s) doesn't show up.
Being able to pass S automatically would also be acceptable.
Sounds like you need Tee-Object. Example:
some command | Tee-Object -Variable MyVariable
This should pass everything from the command down the pipe, as well as store all output from the command in the $MyVariable variable for you.
You need to give some specific example that doesn't work. I tried this and it works:
function test { $c = read-host "Say something"; $c }
$x = test
I still see "Say something". read-host does not output to standard output so your problem is surprising. Even this works:
read-host "Say something" *> out
=== EDIT ===
Since this is interaction with cmd.exe you have two options AFAIK. First, test command:
test.cmd
#echo off
set /p something="Say something: "
echo %something%
This doesn't work as you said: $x= ./test.cmd
To make it work:
a) Replace above command with: "Say something:"; $x= ./test.cmd. This is obviously not ideal in general scenario as you might not know in advance what the *.cmd will ask. But when you do know its very easy.
b) Try this:
Start-transcript test_out;
./test.cmd;
Stop-transcript;
gc .\test_out | sls 'test.cmd' -Context 0,1 | select -Last 1 | set y
rm test_out
$z = ($y -split "`n").Trim()
After this $z variable contains: Say something: something. This could be good general solution that you could convert to function:
$z = Get-CmdOutput test.cmd
Details of text parsing might be slightly different in general case - I assumed here that only 1 question is asked and answer is on the same line but in any case with some work you will be able to get everything cmd.exe script outputed in general case:
=== EDIT 2 ===
This might be a better general extraction:
$a = gi test_out; rm test_out
$z = $a | select -Index 14,($a.count-5)
$z
$variable = ""
some command | % {$variable += $_;"$_"}
This executes the command, and each line of output is both added to $variable and printed to the console.
I need a batch command to return everything until after a certain substring.
What I mean, is when I have a string like this: "Hi! How are you doing? I don't care!!!!!" I can execute a command that gives me everything until after "?".
I looked around the web and didn't find anything that I wanted. I found one method that took everything until after a substring and changed it:
set name=123456789
set blablabla=%name:*5=5%
This returns "56789" to the variable blablabla. The strings in my program are not going to be specific, so this won't work.
Thank you for any help!
Use sed and regular expressions:
$ string1='Hello my name is Foobar? What do I care!'
$ string2=$(echo $string1 | sed 's/^.*\? //')
$ echo $string2
What do I care!
I have not understood your requirements fully. But I think PowerShell is a better option for this. However, you can use following script to get all characters upto given delimiter.
#echo off
set delim=%1
set input=%2
for /f "delims=%upto%" %%i in ("%input%") do (
echo %i
goto :eof
)
Sample run command:
stringupto.bat 5 123456789
Output:
1234
Here is my code there is plenty more but these work independently
echo $row['Queue'];
echo "Modify";
what I want to do is this
echo "$row['Queue']";
this doesn't work and gives a syntax error. any tips on how to get this to work?
thanks!
This would be:
echo "" . $row['Queue'] . "";
echo "".$row['Queue']."";
I'm using powershell to run another powershell script, at some point the other script asks for some input, I would like to be able to read the output from the other script and based on that supply input to it. Similar to what you can do with expect on bash.
Any ideas?
Thanks
Just posting my solution so that it can help someone. I faced the same problem while running some other script that will ask for answers. First create a file "inputFileLocation.txt" with answers to each question in each line in sequence. Then run the script in below syntax. And it will do the work.
`cmd.exe /c "script.bat < inputFileLocation.txt"`
You just use Expect program in your powershell. It works. Powershell is a shell too, you can run code wrote by powershell, which call bash code, which call powershell again.
Bellow is a test, it passed.
It "can work with tcl expect" {
$bs = #'
echo "Do you wish to install this program?"
select yn in "Yes" "No"; do
case $yn in
Yes ) echo "install"; break;;
No ) exit;;
esac
done
'#
$bsf = New-TemporaryFile
$bs | Set-Content -Path $bsf
$tcls = #'
#!/bin/sh
# exp.tcl \
exec tclsh "$0" ${1+"$#"}
package require Expect
set timeout 100000
spawn {spawn-command}
expect {
"Enter password: $" {
exp_send "$password\r"
exp_continue
}
"#\? $" {
exp_send "1"
}
eof {}
timeout {}
}
'#
$tclf = New-TemporaryFile
$tcls -replace "{spawn-command}",("bash",$bsf -join " ") | Set-Content -Path $tclf
"bash", $tclf -join " " | Invoke-Expression
Remove-Item $bsf
Remove-Item $tclf
}
Let me explain the test.
create a bash file which expect an input.
create a tcl file which call bash created in step one.
invoke tcl program from powershell, it works, will not waiting for input.
Sample to solve part of the problem
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
Start-Process -FilePath C:\myexecbatchfile.bat
# Wait the application start for 2 sec
Start-Sleep -m 2000
# Send keys
[System.Windows.Forms.SendKeys]::SendWait("input1")
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Start-Sleep -m 3000
[System.Windows.Forms.SendKeys]::SendWait("input2")
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
I am not aware of any native capability to duplicate exact. This question has an answer that claims to be able to pass content to/from a process, so it might work with what you want.
How to run interactive commands in another application window from powershell
Good Luck!
Lee Holmes put out an "Expect for Powershell" in 2014 on the Powershell Gallery called Await. Turns out emulating expect is a lot more complicated than you'd imagine, involving the Win32 calls.
Package
https://www.powershellgallery.com/packages/Await/0.8
Demo
https://www.youtube.com/watch?v=tKyAVm7bXcQ
I'm trying to use a variable as a command's parameter but can't quite figure it out. Let's say MyCommand will accept two parameters: option1 and option2 and they accept boolean values. How would I use $newVar to substitute option 1 or 2? For example:
$newVar = "option1"
MyCommand -$newVar:$true
I keep getting something along the lines of 'A positional parameter cannot be found that accepts argument '-System.String option1'.
More Specifically:
Here, the CSV file is an output of a different policy. The loop goes through each property in the file and sets that value in my policy asdf; so -$_.name:$_.value should substitute as -AllowBluetooth:true.
Import-Csv $file | foreach-object {
$_.psobject.properties | where-object {
# for testing I'm limiting this to 'AllowBluetooth' option
if($_.name -eq "AllowBluetooth"){
Set-ActiveSyncMailboxPolicy -Identity "asdf" -$_.name:$_.value
}}
}
Typically to use a variable to populate cmdlet parameters, you'd use a hash table variable, and splat it, using #
$newVar = #{option1 = $true}
mycommand #newVar
Added example:
$AS_policy1 = #{
Identity = "asdf"
AllowBluetooth = $true
}
Set-ActiveSyncMailboxPolicy #AS_policy1
See if this works for you:
iex "MyCommand -$($newVar):$true"
I had the same Problem and just found out how to resolve it. Solution is to use invoke-Expression: invoke-Expression $mycmd
This uses the $mycmd-string, replaces variables and executes it as cmdlet with given parameters
Nowadays, If you don't mind evaluating strings as commands, you may use Invoke-Expression:
$mycmd = "MyCommand -$($newVar):$true"
Invoke-Expression $mycmd
I would try with:
$mycmd = "MyCommand -$($newVar):$true"
& $mycmd
result
Can't work because the ampersand operator just execute single commands without prameters, or script blocks.