为什么我的控制台应用程序从System32运行？

Question

I have a console app which is located on my desktop. I have set it to a Scheduled Task to run every 20 Minutes indefinitely. I have turned off auto sleep/hibernate. Then I left my PC ON and locked my desktop for the weekend (2-3 days).

My console app was developed to email me every time it catches an exception. When I returned, checked my inbox received a couple of error emails containing

Access to the path 'C:\\WINDOWS\\system32\\myLogs\\' is denied.

it seemed my console app was being run from System32 not from my Desktop .

Q: Why is it behaving like it?

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this is my string on creating my myLog folder path

var logpath = Directory.GetCurrentDirectory() + Properties.Settings.Default.LogPath;

this checks if the folder exists, if not it creates a new folder.

if (!Directory.Exists(logpath))
   Directory.CreateDirectory(logpath);

I believe the error was triggered on checking/creating the folder. My app should create the myLog folder in the same directory as my console app.

Q: Why is it running from System32 Folder?

Answer 1

Scheduled Tasks are launched by the Task Scheduler service. This service runs inside the C:\\Windows\\System32\\svchost.exe executable. By default, all applications launched by the Task Scheduler are launched with C:\\Windows\\System32 as the current directory.

You can change the start directory in the Edit Action dialog of the Task Scheduler:

You can use environment variables. For example, %USERPROFILE% will set the start directory to the user's profile directory (eg. C:\\Users\\MyUsername).

Rather than changing the start directory for the scheduled task, you may want to find the the directory where the console application executable is located :

System.Reflection.Assembly.GetExecutingAssembly().Location

Answer 2

Console applications are "command line" and they are run from CMD.EXE which is usually located in C:\\Windows\\System32\\

I suspect the scheduled task sets the current directory to where CMD.EXE is located and then launches your application by specifying the full folder,

(note there is one in \\Syswow64\\ for 32-bit command lines for 64-bit machines).