BuilderBob
25th March 2009 16:00 UTC

UAC plugin CallFunctionAsUser GetTempPath returns empty?
  I want to make an installer with UAC plugin where I can detect some original user folders using the user level process, and then copying files to Program Files using the elevated admin user process.

I began by finding the TEMP folder, calling GetTempPath using System plugin, but calling it in the user level process returns emtpy string or "0" ("0" if I run it in a virtual XP from a non-admin user, and when the elevation dialog pops I enter an admin user credentials).

Can anybody tell me why it happens or how should I do it? Here's my complete script:

SetCompressor lzma


OutFile.TempDir.exe


Name "TempDir"

>VIProductVersion "1.0.0.0"

>VIAddVersionKey "FileVersion" "1.0.0.0"

>VIAddVersionKey "FileDescription" "TempDir"

>VIAddVersionKey "ProductName" "TempDir"

>VIAddVersionKey "CompanyName" "Temp dir Inc."

>VIAddVersionKey "LegalCopyright" "lalala (c) 2009"

>RequestExecutionLevel user


SilentInstall silent


>!include UAC.nsh

>!include LogicLib.nsh


>Function .OnInit

   ${UAC.I.Elevate.AdminOnly}

>FunctionEnd


>Function .OnInstFailed

   ${UAC.Unload}

>FunctionEnd


>Function .OnInstSuccess

   ${UAC.Unload}

>FunctionEnd


>!define GetTemp "!insertmacro GetTemp"

>!macro GetTemp Answer

    Call GetTemp

    Pop${Answer}

!macroend

>!define UserGetTemp "!insertmacro UserGetTemp"

>!macro UserGetTemp Answer

   ${UAC.CallFunctionAsUser} GetTemp

    Pop${Answer}

!macroend

>Function GetTemp

    Push $R1

    

    Push $R0

    System::Call "*(&t${NSIS_MAX_STRLEN}) i .R0"

   System::Call "kernel32.dll::GetTempPathA(i ${NSIS_MAX_STRLEN}, i R0)"

   System::Call "*$R0(&t${NSIS_MAX_STRLEN} .R1)"

   System::Free $R0

    Pop $R0

    

    Push $R2

    StrCpy $R2 $R1"" -1

   ${If} $R2 == "\"

    ${OrIf} $R2 == "/"

        StrCpy $R1 $R1 -1

    ${EndIf}

    Pop $R2

    

    Exch $R1

FunctionEnd


Section

    ${UserGetTemp} $0

    ${GetTemp} $1

    MessageBox MB_OK "$$TEMP: $TEMP$nUser Temp: $0$nTemp: $1"

SectionEnd 

>

Anders
25th March 2009 16:07 UTC

you can't read the "user" stack in the admin process

you can use UAC::GetShellFolderPath (I can't remember if there is a CSIDL_TEMP)