Shutting down

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2 total messages Started by Jos� Mon, 11 Feb 2008 17:26

#630

Author: Jos�
Date: Mon, 11 Feb 2008 17:26

34 lines
1919 bytes

Some time ago I asked how to shut down my computer. I thought it
worked, but after all it apears there is something wrong with
privileges. After reading help files and websites, I wrote this:

    TOKEN_PRIVILEGES tp;
    HANDLE hToken;
    LUID luid;
    tp.PrivilegeCount = 1;
    tp.Privileges[0].Luid = luid;
    tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
    tp.Privileges[0].Attributes = 0;


    LookupPrivilegeValue(
            NULL,            // lookup privilege on local system
            "SE_SHUTDOWN_NAME",   // privilege to lookup
            &luid ) ;        // receives LUID of privilege

AdjustTokenPrivileges(
           hToken,
           FALSE, 
           &tp,
           sizeof(TOKEN_PRIVILEGES), 
           (PTOKEN_PRIVILEGES) NULL,
           (PDWORD) NULL);

      ExitWindowsEx(EWX_POWEROFF,0);

I think the trouble is the first parameter of AdjustTokenPrivileges,
which, according to the help file "TokenHandle identifies the access
token that contains the privileges to be modified". That's Greek to
me.
-- 
Jos�

Re: Shutting down

#631

Author: Remy Lebeau (TeamB)
Date: Mon, 11 Feb 2008 18:25

27 lines
2038 bytes

"Jos�" <jose@127.0.0.1> wrote in message 
news:nr01r35bb4etpk28l2uf89a7f01bvlvsqk@4ax.com...

>    LookupPrivilegeValue(
>            NULL,            // lookup privilege on local system
>            "SE_SHUTDOWN_NAME",   // privilege to lookup
>            &luid ) ;        // receives LUID of privilege

SE_SHUTDOWN_NAME is a precompiler macro, not a string.  The actual string 
value is "SeShutdownPrivilege".  To use SE_SHUTDOWN_NAME, you need to get 
rid of the quotation marks, ie:

    LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &luid);

> I think the trouble is the first parameter of AdjustTokenPrivileges,
> which, according to the help file "TokenHandle identifies the access
> token that contains the privileges to be modified". That's Greek to
> me.

You need to use OpenThreadToken() and/or OpenProcessToken() to get the 
required access token.  I suggest you go to http://www.deja.com and search 
through the newsgroup archives.  Examples of using AdjustTokenPrivileges() 
have been posted many times before.


Gambit

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