| 1 | /* $Id: libW32kHandleSystemEvent.c,v 1.2 2001-02-21 07:47:58 bird Exp $
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| 2 | *
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| 3 | * libW32kHandleSystemEvent - Override system events like Ctrl-Alt-Delete
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| 4 | * and Ctrl-Alt-2xNumLock.
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| 5 | *
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| 6 | * Copyright (c) 2000-2001 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 7 | *
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| 8 | * Project Odin Software License can be found in LICENSE.TXT
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| 9 | *
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| 10 | */
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| 11 |
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| 12 |
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| 13 | /*******************************************************************************
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| 14 | * Header Files *
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| 15 | *******************************************************************************/
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| 16 | #define INCL_DOSERRORS
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| 17 | #define INCL_DOSFILEMGR
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| 18 | #define INCL_DOSDEVICES
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| 19 |
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| 20 |
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| 21 | /*******************************************************************************
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| 22 | * Internal Functions *
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| 23 | *******************************************************************************/
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| 24 | #include <os2.h>
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| 25 | #include "win32k.h"
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| 26 | #include "libPrivate.h"
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| 27 |
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| 28 |
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| 29 | /**
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| 30 | * Override a system event.
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| 31 | * @returns NO_ERROR on success.
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| 32 | * ERROR_INVALID_PARAMETER If incorrect parameter specified.
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| 33 | * ERROR_ACCESS_DENIED If you tried to unset (fHandle=FALSE) an event specifying the wrong
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| 34 | * hev. Or you tried to handle (fHandle=TRUE) and event which is allready
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| 35 | * handled by someone else (which is alive and kicking - ie. !fBad).
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| 36 | * ERROR_INIT_ROUTINE_FAILED If the Win32k library isn't inited successfully.
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| 37 | * Any errorcode returned by DosDevIOCtl.
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| 38 | * @param ulEvent Event to override.
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| 39 | * In win32k.h the valid events are defined.
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| 40 | * @param hev Handle of shared event semaphore which is posted when
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| 41 | * the specified system event occures.
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| 42 | * If the value 0xFFFFFFFF is specified the system will handle the event.
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| 43 | * @param fHandle Action flag. <br>
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| 44 | * TRUE: Take control of the event.<br>
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| 45 | * FALSE: Give control back to the OS of this event. (hev must match the current handle!)
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| 46 | * @status partially implemented.
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| 47 | * @author knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 48 | * @remark Not all events are implemented yet.
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| 49 | */
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| 50 | APIRET APIENTRY W32kHandleSystemEvent(ULONG ulEvent, HEV hev, BOOL fHandle)
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| 51 | {
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| 52 | APIRET rc;
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| 53 |
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| 54 | if (fInited)
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| 55 | {
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| 56 | K32HANDLESYSTEMEVENT Param;
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| 57 | ULONG cbParam = sizeof(Param);
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| 58 | ULONG cbData = 0UL;
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| 59 |
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| 60 | Param.hdr.cb = sizeof(Param);
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| 61 | Param.hdr.rc = ERROR_NOT_SUPPORTED;
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| 62 | Param.ulEvent = ulEvent;
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| 63 | Param.hev = hev;
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| 64 | Param.fHandle = fHandle;
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| 65 |
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| 66 | if (usCGSelector)
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| 67 | return libCallThruCallGate(K32_HANDLESYSTEMEVENT, &Param);
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| 68 | rc = DosDevIOCtl(hWin32k,
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| 69 | IOCTL_W32K_K32,
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| 70 | K32_HANDLESYSTEMEVENT,
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| 71 | &Param, sizeof(Param), &cbParam,
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| 72 | "", 1, &cbData);
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| 73 |
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| 74 | if (rc == NO_ERROR)
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| 75 | rc = Param.hdr.rc;
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| 76 | }
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| 77 | else
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| 78 | rc = ERROR_INIT_ROUTINE_FAILED;
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| 79 |
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| 80 | return rc;
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| 81 | }
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| 82 |
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