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Meh
Asked: 2010-07-31 05:26:49 +0800 CST

Can I hook PowerShell to call a function each time I execute a command?

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I want to change the title of the PowerShell window to the command line of the currently executing process inside it, just like CMD.EXE does.

Can I do this in PowerShell?

Is there some function like prompt which is called when I execute a command in PowerSHell?

windows powershell console

3 Answers

  1. Do you want it for a small select number of executables? Or all exes?

    One hack for a select number of executables would to do

    function cmd
{
    $title = $host.UI.RawUI.WindowTitle
    $host.UI.RawUI.WindowTitle = 'cmd.exe ' + ($args -join " ")
    cmd.exe $args
    $host.UI.RawUI.WindowTitle = $title
}

    Then just run cd c: cmd /c dir /s

    And see the title change

    And for all the commands

    Get-Command -CommandType Application | where {$_.Name -match '.exe$'} | %{
$f = @'
    function {0}
    {{
        $title = $host.UI.RawUI.WindowTitle
        $host.UI.RawUI.WindowTitle = '{0} ' + ($args -join " ")
        {0}.exe $args
        $host.UI.RawUI.WindowTitle = $title
    }}
'@ -f ($_ -replace '.exe', '')
Invoke-Expression $f
}

    And then try ping 127.0.0.1

    Its hacky, YMMV

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  2. This is definitely possible, though you do have to code for it yourself. This TechNet article describes how to change the Title line of the executing window.

    http://technet.microsoft.com/en-us/library/ee156814.aspx

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  3. Yes there is, this is my function for prompt, it put the last part of the actual path in the prompt. Also set the window title and when you runit as admin change the background and add a Admin: in the title.

    $FirstRun=1
function prompt{
$shortpath = split-path (Get-Location) -leaf;

$id = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$p = New-Object System.Security.Principal.WindowsPrincipal($id)

if
($p.IsInRole([System.Security.Principal.WindowsBuiltInRole]::Administrator))
   {
   $host.UI.RawUI.WindowTitle = "ADMIN:$shortpath"
   if($FirstRun){$host.UI.RawUI.BackgroundColor = "Black"; cls; $global:FirstRun = 0;}
}
else
{$host.UI.RawUI.WindowTitle = $shortpath}

$(if (test-path variable:/PSDebugContext) 
   { '[DBG]: ' } 
else { '' }) + 'PS ' + $($shortpath) + $(if ($nestedpromptlevel -ge 1) { '>>' }) + '>         ';

}

    Put that in your profile, remember that any profile is accesible directly with the profile variable: $profile.CurrentUserCurrentHost, $profile.CurrentuserAllhost ....etc.

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