problem of log in service

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My application is installed as windows service.
For log on file, I use the following class :

C++

debugTextListener = gcnew TextWriterTraceListener("c:\\myApp.log.txt");
...
debugTextListener->WriteLine( "app starts.");
debugTextListener->Flush();

If I use my application as program, log file is filled correctly;
If I use it as service, It run correctly, but no log file is created.
Any Idea ?
Best regards.

Posted 9-Feb-12 6:17am

Foulques NERA

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Manfred Rudolf Bihy · Answer 1 · 2012-02-09T07:11:00

It depends under which credentials the windows service is running. It may well be that the account the windows service is running under does not have sufficient rights to write to the root folder of C:. If possible try to let the service run under the same account when you ran it as a program and see if that will help fix the issue. Then it is up to you to decide to either change the ACL on C:\ or have the service run under an account that has sufficient rights to write to C:\.

Regards,

Manfred

Sergey Alexandrovich Kryukov · Answer 2 · 2012-02-09T07:36:00

As Manfred explained, the server usually don't have permission to write to this location. The locations like that are simply illegal; you should use appropriate directory under "Users" or "Documents and Settings". Also, there are no cases when any hard-coded path name could be useful, ever. All path names are always calculated during run-time, based on assembly location (for read-only files only), environment of configuration files.

But you don't need to do even that. For logging, use the system log via the class System.Diagnostics.EventLog, http://msdn.microsoft.com/en-us/library/system.diagnostics.eventlog.aspx[^].

For some more useful detail and idea, please see my past solutions:
How to create event log under a folder[^],
MsBuild OutPut to the TextBox on the fly in Windows Application[^].

This way, you can make logging structured per you project, redirect it, etc.

—SA

Satheesh1546 · Answer 3 · 2012-02-09T17:11:00

Hi,

This means that the service doesn't have sufficient privileges to
create the log file. Try giving admin privilege to service.
Try one of the following.

1. Edit the manifest to make sure that the service will run only with admin privileges.
<requestedExecutionLevel
level="asInvoker|highestAvailable|requireAdministrator"
uiAccess="true|false"/>
2. Lookup the current privilege, and then adjust it to give admin privileges.
LookupPrivilegeValue() and AdjustTokenPrivileges() will do the trick.

Thanks

problem of log in service

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