I'm creating installer using wix, and in my deferred custom action File.Exists return false on existing temporary file. How can I make C:\Users\<me>\AppData\Local\Temp visible for my custom action?
You should show the actual code. It might work fine in code run from the interactive user's desktop, but it's being called from an msiexec process running impersonated (or with the system account) from the system folder, and you don't even say if it's a Dll call or an executable.
However, the issue is that you can't just look in that folder from a custom action. If you are running deferred with the system account and looking at Environment.SpecialFolder to get the user's temp folder you'll get the system account's temp folder. If you run with impersonation you still won't get the right location because impersonation does not load up the entire user profile that would give you access to user profile locations like the user's temp folder.
Without knowing exactly what you're trying to do this may not help, but WiX and Windows Installer have searches which will do exactly what you want. Just do a file search for that file in TempFolder, which is the property name location you need. You need this kind of thing searching TempFolder, ignoring the version checks:
http://wixtoolset.org/documentation/manual/v3/howtos/files_and_registry/check_the_version_number.html
Related
I have a per-machine WiX installer (InstallScope="perMachine" InstallPrivileges="elevated") and I need to create a folder and copy a few files to the Documents folder of each user running the application. At the moment I install the files to a personal folder of the current user, but that's wrong and I get the ICE91 verification warning:
ICE91: The file 'SomeFile' will be installed to the per user directory 'SomeDir'
that doesn't vary based on ALLUSERS value. This file won't be copied to each
user's profile even if a per machine installation is desired.
I want the files to be automatically copied to the Documents folder of each user. Could someone post the step-by-step instructions how to do that?
UPDATE: I will be on holiday until September, during that time I will not be able to respond to any comments.
Windows Installer will do this - it's what advertised shortcuts will do. If you install a file to a user specific folder location and a different user logs on, then that file will be missing for that user and repair mechanism of the advertised shortcut repair will install it from the original MSI file. In your case the PersonalFolder property is the user's Documents folder.
To arrange this, the file must be the keypath of a component, and that component must be in a feature with an advertised shortcut. When the shortcut is used the component and containing feature are checked for "self healing" and the missing file installed. This works for users that don't yet exist. Older Office installers once did this to install user-specific items such as templates.
The MSI must obviously be available for this to work, and there is no mechanism to remove the files at uninstall time.
An alternative (or if there are no advertised shortcuts) is to add code to the app that calls MsiProvideComponment (or equivalent p/invoke) passing the ProductCode, feature name, Component id (of that documents file) and use INSTALLMODE_DEFAULT, which will install the file if it's missing as documented here:
https://msdn.microsoft.com/en-us/library/windows/desktop/aa370356(v=vs.85).aspx
and it will be missing and therefore will be installed for a user who has not run the app before.
Why would you want to do this this way? What if there are 10000 (just for example) users on the machine? You want to copy the files to all 10000 documents folders taking up potentially GBs of space (depending on the size if the files copied)? If these are configuration options needed by your app, the app itself should create default files in the user's documents location on the first run if they are not present otherwise load the settings from these files. You should not put the default files there for every single user on the machine at install time.
This approach also fails for new users added after you install. How will they get the files in their documents folder? Do they have to reinstall the product?
Consider a per machine install of per user installers with shortcuts that interested users could launch. For example, templates.msi, examples.msi.
I would like to delete file (that was created by pyinstaller in C:\Users\User\AppData\Local\VirtualStore\Program Files (x86)\App\tmp )
during Uninstall (using WiX). Any idea on how to do that?
Does anybody know why pyinstaller creates that file and if I can control that?
A partial answer: That virtual store location is where Windows redirects file output when the program is not privileged enough to write to a location, and does not have an elevation-type manifest that shows it is UAC-aware. This might help:
http://sourcedaddy.com/windows-7/uac-virtualization.html
So it appears that pyinstaller assumes it is being run as administrator, but it isn't, and is writing to a location that's virtualised. Instead of trying to remove those files I'd look at that installer and how you are running it and (since it seems to require admin privilege) how to have it run with admin privilege. I assume it's old technology because an updated version would presumably include an elevation manifest saying that it requires admin privilege.
I'm creating a WIX installer for a C# application.
In the application I use System.Configuration.ConfigurationManager.AppSettings[Setting1] to get settings.
My question is, where must I place the program.exe.config file on the machine in order for it to work?
I can't place it with the program in ProgramFiles directory, since those files are read-only.
I tried:
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal);
config.AppSettings.Settings[Config1].Value = "Value1";
config.Save();
Unfortunately I don't know where it's looking.
Thanks your replies, Trevy
It should be in the same folder of the program.exe. Use wix to copy both program.exe and program.exe.config to the required folder.
If you need to edit the configuration file during the installation you will need to do it using a custom action in wix. Make sure you pass the file path to the custom action and write the code to read the configurations in that file and edit.
The problem isn't that the files there are readonly - the problem is that you are trying to update files in the Program Files folder with your config.Save, and you can't do that if you are a limited user, and you are always limited (even if you are admin) unless you elevate. The short answer is that:
If your app routinely updates files in restricted areas then it probably needs elevation, so give it an elevation manifest.
If however you require you app to be used by limited users and allow them to update that config file then don't install to Program Files. Choose User Appdata folder, for example. Windows is probably using your config file during program startup, so you can't separate it from the exe.
When I was creating an installer for my app, I found I couldn’t save my settings.
The reason is because the Program Files repository, from a practical point of view, is read-only (Applications should never run with elevated permissions). When installing a program, the only time we modify the MyApp.exe.config file is at installation/upgrade/repair time.
The config file has many sections. One of them is userSettings. This is where we store any data we need to modify during the lifetime of the application. When run for the first time, Windows creates a hidden file in the user’s AppData folder. That is why we can save user settings, even though the config file is in the same directory as the MyApp.exe
So the answer is, if we run into permission errors when trying to save our settings it means we are writing our settings to the wrong section of the config file. We need to place it in the userSettings section and nowhere else.
For convenience, Visual Studios has a settings editor (the settings tab of the properties page). It allows you to create strongly typed user and application settings. The generated class lets you save user settings, but not application settings for the above reasons.
I try to create a wix installer that has the need to create a file in the programme folder after Installation. For doing so, I have created a custom action, but I now have the following problem:
In order to write the file, I need to know the installation directory from session["INSTALLDIR"], which is only available if the action is executed "immediate".
However, if i run "immediate" after "install files", the target directory does not yet exist. If I run "deferred", it exists, but i cannot access session["INSTALLDIR"].
If I run "immediate" after "InstallFinalize", I can get the variable and the directory exists, but I am not elevated and hence not allowed to write the file.
What is the correct combination for writing a file to the installation directory?
You need to use CustomActionData to access property values from a deferred CA. You need something like this
or
another answer
Beyond using a built in extension for custom actions instead of writing your own, the next level would be how can I move complexity / custom actions out of the installer?
One thought is to write it to the registry instead. Another thought is for the application reading the value to be able to determine installation directory on it's own. One possibility is reflection to get the location another possibility is to query the MSI API for where the product is installed.
I am about to create a MSI package.
During the installation (launched e.g. via double-click on the MSI) some files contained in the MSI are deposited deeper under c:\ProgramData (resp. the CommonAppDataFolder), e.g. c:\ProgramData\myCompany\myApplication.
Later when the installed application is run by the user the application may need to modify these file.
The problem is that neither the running application nor the user e.g. via Windows Explorer has the right to modify any files under c:\ProgramData\myCompany\myApplication created during installation.
The files do not have a readonly attribute set.
The strange thing for me now is: If I install the MSI via msiexec /q /i then I have write permissions on these files.
My MSI is created with WiX, my os is Win 7, the user is member of the administrator group.
Can anyone tell me why that is so, and how I can gain write permissions to these files w/o having to use /q /i?
Thanks
Jan
EDIT 2014-03-24: Damned. I missed to specify the InstallPrivileges attribute on my element, I just didn't know about it.
Setting it to "limited" does not show up a UAC prompt when installing to ProgramData! And now the user / my application is allowed to overwrite files in the destination folder :)
I don't know why that behavior would be different regarding access to that folder unless you have a custom action that does something that is only in the UI sequence. That's the only functional difference I can think of - the UI sequence is suppressed in a silent install.
However the common app data folder is not normally writeable to limited users. I'm not sure how much you know about UAC, but it doesn't matter if the user running the program is an admin or not because by default admins run with limited privileges. If the app needs admin privilege to run then it needs building with an elevation manifest so it asks for elevation to admin privilege. Either that or run it as administrator from a shortcut.
Windows access control is extremely complicated to deal with. In every version of Windows there is something new and changed to deal with, and it looks like the default write access in ProgramData now includes some sort of special ACL / DACL. If this is indeed the problem you can apply new permissions there and open up for regular users to write. Please note that I am not quite aware of exactly what newer versions of Windows apply as default. The tool I generally use to set permissioning is subinacl.exe. A real handful of a tool with a command line that can scare the most experienced system administrators. Some command line samples are here. You can also use the LockPermissions table in MSI, but somehow there are some issues with how these permissions are applied to the file system object. subinacl.exe is more complex, and more capable.
More on file and folder permissioning:
http://technet.microsoft.com/en-us/library/bb727008.aspx
http://support.microsoft.com/kb/308419
With regards to where you should put different types of files on the system, please check this thread.