Writing to the event log without admin - vsto

I am admin on my local machine. However the app I am creating (an outlook VSTO addin) will be deployed by a deployment admin to users who won't have admin.
The app installs correctly.
My issue is that I have code which checks if an EventLog.SourceExists("my VSTO addin"). If not it will EventLog.CreateEventSource("my VSTO addin").
My questions:
Do I really need to create an event source? Will it still log without the source existing?
How should I create the event source (if #1 is required)?
2a Perhaps I need to create a small app which creates the event source and this needs to be installed by an admin?
2b Perhaps I can put it in the code somewhere which will invoke when its being installed? (I'm using install shield)
2c Perhaps it can be done by an admin as part of group policy?
2d I can create a registry key as per https://learn.microsoft.com/en-us/windows/desktop/EventLog/event-sources

To answer my questions:
I do need create the source.
To solve this I created another console app which just creates the event log sources I require.
In installshield I added this new exe as a custom action. The install is done with Admin mode so the sources are created.
This fixes the application because non admins were using the app and it was trying to create the event log sources if they didn't exist. I removed this check.

Related

Create a first-time logon script for new users

I am creating generalized images of a Windows 10 machine for my company and some of the software we use requires setting up for each user account. I have a script (.cmd) that can do all of the setup automatically. Is there a way to make the script run each time a new user logs on, but only the first time they log on?
Every guide I have found explains how to assign a script to a user, but I want to have the script automatically assigned and run the first time a new user logs in, without having to go back and assign the script to their account.
The company uses Active Directory to manage user accounts, so options that use AD are perfectly valid.
EDIT 1:
I found a guide for doing this in windows 7:
https://community.spiceworks.com/topic/886089-mdt-log-on-script-for-each-new-user-run-once
However, I cannot find the locscripts file or some equivalent on Windows 10.
It's possible to trigger a first-run script via the RunOnce registry key. The linked article describes mounting the default user registry hive and adding the RunOnce entry, so that any new profiles created in the future which are based on a copy of this registry will have this setting.

Multiple Authorization In Cocoa App

I'm writing a cocoa app which needs to modify system proxy settings ( I'm using networksetup to do that ).The problem is that it needs system administrator level access to change proxy settings. I tried running both running an NSTask as administrator using Apple's default API ( I used STPrivilagedTask wrapper for it ) and running a shell script with administrator privileges. It works perfect either way, but the problem is that my app needs to change settings so many times, and user has to type his password every single time.
Is there anyway that I can get the privilege one time, and use it again and again ?
What you're looking to do is write a "privileged helper tool" which gets included (or delivered, or embedded) in your application bundle and you can then call using SMJobBless().
Creating a helper tool is not for the faint of heart, but here is a related question with answers that may set you off down the right path.

Is there a WIX extension for install MMC snapin/extension?

It appears there was previously an extension for MMC in Wix2 advising the xmlns http://schemas.microsoft.com/wix/MmcExtension - attempting to read this URL results in an error page currently.
I cannot seem to locate equivalent for Wix3.6, is this deliberately (re)moved, or just missing?
It was removed, you have to manually create the registry keys. This link has a good summation of what you need to do.
The old extension was just a wrapper for the code included in the link above. I'm not sure why they took it out.
You can use also the heat tool (you can find it in the wix bin/ directory).
the usage is simple, you just need to export the registry key generated with installutil and launch the command:
heat reg <your_exported_registry> -o <output_filename>
Related info:
Having generated the registry entries, the larger issue for our MMC snapin was that it was extending the AD Users and Computers Snapin - in particular extending the node types for other directory object types.
I had hoped such a wix extension would cover such, but it was not in the earlier version.
While waiting for Microsoft to address Windows File/Registry protection overly protecting ADUAC and SMADUAC and GPO etc. our customer have requested we work around this.
Using a custom action we take ownership from WRP TrustedInstaller and grant access to Adminstrators group to modify the NodeType key so that additional keys can be added.
Functions sourced initial from MSDN examples
SetPrivilege Example Code
Taking Ownership Example Code
Modify ACL Example Code - this was adjusted Taking ownership to extend ACL rather than create new ACL and blast the old
Some further items of Note:
Pre Win7 - Alternate method to taking ownership would be to use SE_RESTORE_NAME to allow direct changing of an ACL, however installer process from Win7 deliberatly prevents it, this also prevents take ownership from being able to restore the original owner.
Platform Types: SetNamedSecurityInfo doesn't allow 32 bit execution against 64 bit registry - Windows OS limitation still present in Windows 8
It does however allow a 64 bit execution to address both the 64 and wow6432 sections.
For a binary custom action at least need a platform specific dll.

VB.Net 2005 Setup Project Application Data Folder no Content

Under VB.Net 2005, I created a Setup Project which produced installation files for a windows application. I placed the mdb file in the User's Application Data Folder and remapped the DataDirectory to Environment.SpecialFolder.ApplicationData at runtime. Unfortunately, sometimes the system just did create the mdb file at the Application Directory. An example was that I installed the program in Windows 7 under a normal user account. I chose inside the installer that the program would be made available to everyone. After installation, the mdb file would be created automatically for the Administrator account but not for the normal user account. For XP, the whole thing worked fine.
I am tempted to write a routine to check and create the mdb file if it is not present, but why does this happens and what other opinions do I have?
If the application is installed for all users instead of once for each user that logs onto the machine, then you will eventually run into a problem where the database isn't available for the signed on user.
In order to resolve this, you would probably be better off checking for the existence of the database on application startup and then either copying a standard version from the application directory to the current user's data directory or creating a new db from scratch in place. I would recommend the first approach.

Where are the best locations to write an error log in Windows?

Where would you write an error log file, say ErrorLog.txt, in Windows? Keep in mind the path would need to be open to basic users for file write permissions.
I know the eventlog is a possible location for writing errors, but does it work for "user" level permissions?
EDIT: I am targeting Windows 2003, but I was posing the question in such a way as to have a "General Guideline" for where to write error logs.
As for the EventLog, I have had issues before in an ASP.NET application where I wanted to log to the Windows event log, but I had security issues causing me heartache. (I do not recall the issues I had, but remember having them.)
Have you considered logging the event viewer instead? If you want to write your own log, I suggest the users local app setting directory. Make a product directory under there. It's different on different version of Windows.
On Vista, you cannot put files like this under c:\program files. You will run into a lot of problems with it.
In .NET, you can find out this folder with this:
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)
And the Event Log is fairly simple to use too:
http://msdn.microsoft.com/en-us/library/system.diagnostics.eventlog.aspx
Text files are great for a server application (you did say Windows 2003). You should have a separate log file for each server application, the location is really a matter of convention to agree with administrators. E.g. for ASP.NET apps I've often seen them placed on a separate disk from the application under a folder structure that mimics the virtual directory structure.
For client apps, one disadvantage of text files is that a user may start multiple copies of your application (unless you've taken specific steps to prevent this). So you have the problem of contention if multiple instances attempt to write to the same log file. For this reason I would always prefer the Windows Event Log for client apps. One caveat is that you need to be an administrator to create an event log - this can be done e.g. by the setup package.
If you do use a file, I'd suggest using the folder Environment.SpecialFolder.LocalApplicationData rather than SpecialFolder.ApplicationData as suggested by others. LocalApplicationData is on the local disk: you don't want network problems to stop you from logging when the user has a roaming profile. For a WinForms application, use Application.LocalUserAppDataPath.
In either case, I would use a configuration file to decide where to log, so that you can easily change it. E.g. if you use Log4Net or a similar framework, you can easily configure whether to log to a text file, event log, both or elsewhere (e.g. a database) without changing your app.
The standard location(s) are:
C:\Documents and Settings\All Users\Application Data\MyApp
or
C:\Documents and Settings\%Username%\Application Data\MyApp
(aka %UserProfile%\Application Data\MyApp) which would match your user level permission requirement. It also separates logs created by different users.
Using .NET runtime, these can be built as:
AppDir=
System.Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData)
or
AppDir=
System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
followed by:
MyAppDir = IO.Path.Combine(AppDir,'MyApp')
(Which, hopefully, maps Vista profiles too).
Personally, I would suggest using the Windows event log, it's great. If you can't, then write the file to the ApplicationData directory or the ProgramData (Application Data for all users on Windows XP) directory.
The Windows event log is definitely the way to go for logging of errors. You're not limited to the "Application" log as it's possible to create a new log target (e.g. "My Application"). That may need to be done as part of setup as I'm not sure if it requires administrative privileges or not. There's a Microsoft example in C# at http://support.microsoft.com/kb/307024.
Windows 2008 also has Event Log Forwarding which can be quite handy with server applications.
I agree with Lou on this, but I prefer to set this up in a configuration file like Joe said. You can use
file value="${APPDATA}/Test/log-file.txt"
("Test" could be whatever you want, or removed entirely) in the configuration file, which causes the log file to be written to "/Documents and Settings/LoginUser/Application
Data/Test" on Windows XP and to "/Users/LoginUser/AppData/Roaming/Test on Windows Vista.
I am just adding this as I just spent way too much time figuring how to make this work on Windows Vista...
This works as-is with Windows applications. To use logging in web applications, I found Phil Haack's blog entry on this to be a great resource:
http://haacked.com/archive/2005/03/07/ConfiguringLog4NetForWebApplications.aspx
%TEMP% is always a good location for logs I find.
Going against the grain here - it depends on what you need to do. Sometimes you need to manipulate the results, so log.txt is the way to go. It's simple, mutable, and easy to search.
Take an example from Joel. Fogbugz will send a log / dump of error messages via http to their server. You could do the same and not have to worry about the user's access rights on their drive.
I personally don't like to use the Windows Event Log where I am right now because we do not have access to the production servers, so that would mean that we would need to request access every time we wanted to look at the errors. It is not a speedy process unfortunately, so your troubleshooting is completely haulted by waiting for someone else. I also don't like that they kind of get lost within the ones from other applications. Sure you can sort, but it's just a bit of a nucance scrolling down. What you use will end up being a combination of personal preference coupled along with limitations of the enviroment you are working in. (log file, event log, or database)
Put it in the directory of the application. The users will need access to the folder to run and execute the application, and you can check write access on application startup.
The event log is a pain to use for troubleshooting, but you should still post significant errors there.
EDIT - You should look into the MS Application Blocks for logging if you are using .NET. They really make life easy.
Jeez Karma-killers. Next time I won't even offer a suggestion when the poster puts up an incomplete post.