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Security and Windows Vista A forum for discussion on security issues with Windows Vista. (microsoft.public.windows.vista.security) |
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Restarting a Windows Service with C# under Vista when User Account Control is Enabled
Hello!
I need to restart the "Windows Audio Service" (audiosrv) via C#. I'm using the ServiceController Class to do this. It is no problem under XP and no problem under vista if UAC is disabled. But with enabled UAC i'm getting a "access refused" exception. I also tried to do it via console with "net start ..." but the same error appears. Three questions: 1. Is it possible to restart the "windows audio service" if UAC is enabled ? 2. Why does the exception occur? If I do some other stuff, e.g. starting regedit via Process.Start() the user gets asked if he really wants that. I would expect the same behaviour for restarting services. 3. If it's not possible at all: Can I find out programmatically whether UAC is enabled? Thanks and excuse my bad english! |
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Restarting a Windows Service with C# under Vista when User Account Control is Enabled
"gourmet" wrote in message
ps.com... Hello! I need to restart the "Windows Audio Service" (audiosrv) via C#. I'm using the ServiceController Class to do this. It is no problem under XP and no problem under vista if UAC is disabled. But with enabled UAC i'm getting a "access refused" exception. I also tried to do it via console with "net start ..." but the same error appears. Three questions: 1. Is it possible to restart the "windows audio service" if UAC is enabled ? Yes when running as full "Administrator". That is start the console (cmd interpreter) by right clicking "Run as Administrator". 2. Why does the exception occur? If I do some other stuff, e.g. starting regedit via Process.Start() the user gets asked if he really wants that. I would expect the same behaviour for restarting services. The exception occurs because you are running as a standard user, only admins can start, stop .... services. If you want the same behavior you'll have to insert a "manifest" in your executable file. ?xml version="1.0" encoding="utf-8" ? assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" assemblyIdentity version="1.0.0.0" processorArchitecture="X86" name="someExecName" type="win32" / descriptionProgram description/description trustInfo xmlns="urn:schemas-microsoft-com:asm.v3" security requestedPrivileges requestedExecutionLevel level="requireAdministrator" / /requestedPrivileges /security /trustInfo /assembly To add above manifest to the executable assembly, you have to run mt.exe like this; mt -manifest somename.exe.manifest -outputresource:somename.exe;#1 PS change the someExecName and Program description to suit your needs... 3. If it's not possible at all: Can I find out programmatically whether UAC is enabled? See above. Willy. |
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Restarting a Windows Service with C# under Vista when User Account Control is Enabled
"Willy Denoyette [MVP]" wrote in message
... "gourmet" wrote in message ps.com... Hello! I need to restart the "Windows Audio Service" (audiosrv) via C#. I'm using the ServiceController Class to do this. It is no problem under XP and no problem under vista if UAC is disabled. But with enabled UAC i'm getting a "access refused" exception. I also tried to do it via console with "net start ..." but the same error appears. Three questions: 1. Is it possible to restart the "windows audio service" if UAC is enabled ? Yes when running as full "Administrator". That is start the console (cmd interpreter) by right clicking "Run as Administrator". 2. Why does the exception occur? If I do some other stuff, e.g. starting regedit via Process.Start() the user gets asked if he really wants that. I would expect the same behaviour for restarting services. The exception occurs because you are running as a standard user, only admins can start, stop ... services. If you want the same behavior you'll have to insert a "manifest" in your executable file. ?xml version="1.0" encoding="utf-8" ? assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" assemblyIdentity version="1.0.0.0" processorArchitecture="X86" name="someExecName" type="win32" / descriptionProgram description/description trustInfo xmlns="urn:schemas-microsoft-com:asm.v3" security requestedPrivileges requestedExecutionLevel level="requireAdministrator" / /requestedPrivileges /security /trustInfo /assembly To add above manifest to the executable assembly, you have to run mt.exe like this; mt -manifest somename.exe.manifest -outputresource:somename.exe;#1 PS change the someExecName and Program description to suit your needs... 3. If it's not possible at all: Can I find out programmatically whether UAC is enabled? See above. Willy. To further clarify: save the above manifest in a file called "some.exe.manifest", where someApp is the name of your executable file. Say you have "audioCntrl.exe", then you could name your manifest audioCntrl.exe.manifest" and run mt.exe like: mt -manifest audioCntrl.exe.manifest -outputresource:audioCntrl.exe;#1 Willy. PS. type mt /help from the command line for more detailed help on mt. |
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Restarting a Windows Service with C# under Vista when User Account Control is Enabled
Thank you very much!
I will try that manifest stuff on friday and will let you know if it worked for me... |