Installing DLLs to the system directory

Archive: Installing DLLs to the system directory

soup-a-stu
1st May 2001 11:27 UTC

is it possible to extract DLL files to the system directory, but only if they don't already exist?

dTomoyo
1st May 2001 11:57 UTC

Originally posted by soup-a-stu
is it possible to extract DLL files to the system directory, but only if they don't already exist?


1) IfFileExists $SYSDIR\target.dll CheckVer InstNewVer
2) CheckVer:
     CompareDLLVersions source.dll $SYSDIR\target.dll InstNewVer SkipInst
3)  InstNewVer:
      SetOverwrite try
      SetOutPath $SYSDIR
      File source.dll
4) SkipInst:

1) if target.dll existed? goto CheckVer, else goto InstNewVer.
2) Compare DLL Version.
3) Install new version.
4) exit.

My trick... :)

justin
1st May 2001 18:08 UTC

That actually won't work, because CompareDLLVersions compares two DLLs on the _target_ system.

What you have to do is this:


; will update $SYSDIR\target.dll with my_updated_target.dll
SetOutPath $TEMP
File my_updated_target.dll
IfFileExists $SYSDIR\target.dll CheckVer InstNewVer
CheckVer:
     CompareDLLVersions $TEMP\my_updated_target.dll $SYSDIR\target.dll InstNewVer
     Goto SkipInst
InstNewVer:
     Rename /REBOOTOK $TEMP\my_updated_target.dll $SYSDIR\target.dll
     Goto End 
SkipInst:
     Delete $TEMP\my_updated_target.dll
End: