Functions/Get-PowershellPath.ps1
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# Copyright 2012 Aaron Jensen # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Get-PowershellPath { <# .SYNOPSIS Gets the path to powershell.exe. .DESCRIPTION Returns the path to the powershell.exe binary for the machine's default architecture (i.e. x86 or x64). If you're on a x64 machine and want to get the path to x86 PowerShell, set the `x86` switch. Here are the possible combinations of operating system, PowerShell, and desired path architectures, and the path they map to. +-----+-----+------+--------------------------------------------------------------+ | OS | PS | Path | Result | +-----+-----+------+--------------------------------------------------------------+ | x64 | x64 | x64 | $env:windir\System32\Windows PowerShell\v1.0\powershell.exe | | x64 | x64 | x86 | $env:windir\SysWOW64\Windows PowerShell\v1.0\powershell.exe | | x64 | x86 | x64 | $env:windir\sysnative\Windows PowerShell\v1.0\powershell.exe | | x64 | x86 | x86 | $env:windir\SysWOW64\Windows PowerShell\v1.0\powershell.exe | | x86 | x86 | x64 | $env:windir\System32\Windows PowerShell\v1.0\powershell.exe | | x86 | x86 | x86 | $env:windir\System32\Windows PowerShell\v1.0\powershell.exe | +-----+-----+------+--------------------------------------------------------------+ .EXAMPLE Get-PowerShellPath Returns the path to the version of PowerShell that matches the computer's architecture (i.e. x86 or x64). .EXAMPLE Get-PowerShellPath -x86 Returns the path to the x86 version of PowerShell. #> [CmdletBinding()] param( [Switch] # Gets the path to 32-bit PowerShell. $x86 ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $psPath = $PSHOME if( Test-OSIs64Bit ) { if( Test-PowerShellIs64Bit ) { if( $x86 ) { # x64 OS, x64 PS, want x86 path $psPath = $PSHOME -replace 'System32','SysWOW64' } } else { if( -not $x86 ) { # x64 OS, x32 PS, want x64 path $psPath = $PSHome -replace 'SysWOW64','sysnative' } } } else { # x86 OS, no SysWOW64, everything is in $PSHOME $psPath = $PSHOME } Join-Path $psPath powershell.exe } |