548 lines
18 KiB
C++
548 lines
18 KiB
C++
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//
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// machinfo.cpp - SHGetMachineInfo and related functions
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//
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//
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#include "priv.h"
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#include <dbt.h>
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#include <cfgmgr32.h>
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#include <apithk.h>
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#ifndef UNIX
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#include <batclass.h>
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const GUID GUID_DEVICE_BATTERY = { 0x72631e54L, 0x78A4, 0x11d0,
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{ 0xbc, 0xf7, 0x00, 0xaa, 0x00, 0xb7, 0xb3, 0x2a } };
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#include <winsta.h>
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#endif
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//
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// Win95 does not decorate BroadcastSystemMessage, so we can't either.
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//
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#undef BroadcastSystemMessage
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extern "C" {
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WINUSERAPI long WINAPI
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BroadcastSystemMessage(DWORD, LPDWORD, UINT, WPARAM, LPARAM);
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};
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/*****************************************************************************
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*
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* DOCK STATE - Win95, Win98, and WinNT all do this differently (yuck)
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*
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*****************************************************************************/
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C_ASSERT(GMID_NOTDOCKABLE == CM_HWPI_NOT_DOCKABLE);
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C_ASSERT(GMID_UNDOCKED == CM_HWPI_UNDOCKED);
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C_ASSERT(GMID_DOCKED == CM_HWPI_DOCKED);
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#if defined(_X86_) && !defined(UNIX)
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typedef struct CMHDR {
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LPVOID pArgs;
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DWORD dwService;
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DWORD dwRet;
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} CMHDR, *PCMHDR;
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#define CONFIGMG_Get_Hardware_Profile_Info 0x00330052
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//
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// GetDockedState95
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//
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DWORD GetDockedState95()
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{
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struct GHWPI95 { // Get_Hardware_Profile_Info parameter blk
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CMHDR cmhdr;
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ULONG ulIndex;
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PHWPROFILEINFO_A pHWProfileInfo;
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ULONG ulFlags;
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HWPROFILEINFO_A HWProfileInfo;
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} *pghwpi;
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HANDLE hheap;
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DWORD Result = GMID_NOTDOCKABLE; // assume the worst
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#define HEAP_SHARED 0x04000000 /* put heap in shared memory--undoc'd */
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//
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// Win95 Configmg requires the parameter block to reside in the shared
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// heap since we're going to do a cross-process SendMessage.
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//
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hheap = HeapCreate(HEAP_SHARED, 1, 4096);
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if (hheap) {
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// Allocate parameter block in shared memory
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pghwpi = (struct GHWPI95 *)HeapAlloc(hheap, HEAP_ZERO_MEMORY,
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sizeof(*pghwpi));
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if (pghwpi) {
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DWORD dwRecipients = BSM_VXDS;
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pghwpi->cmhdr.dwRet = 0;
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pghwpi->cmhdr.dwService = CONFIGMG_Get_Hardware_Profile_Info;
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pghwpi->cmhdr.pArgs = &pghwpi->ulIndex;
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pghwpi->ulIndex = 0xFFFFFFFF;
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pghwpi->pHWProfileInfo = &pghwpi->HWProfileInfo;
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pghwpi->ulFlags = 0;
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// "Call" the service
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BroadcastSystemMessage(0, &dwRecipients, WM_DEVICECHANGE,
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DBT_CONFIGMGAPI32, (LPARAM)pghwpi);
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if (pghwpi->cmhdr.dwRet == CR_SUCCESS) {
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Result = pghwpi->HWProfileInfo.HWPI_dwFlags;
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} else {
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TraceMsg(DM_WARNING, "GetDockedState95: CONFIGMG did not respond");
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}
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}
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HeapDestroy(hheap);
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} else {
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TraceMsg(DM_WARNING, "GetDockedState95: Unable to create shared heap");
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}
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return Result;
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}
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//
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// On Win98, use the 32-bit interface to configmg.
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//
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CONFIGRET __cdecl
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CallConfigmg98(DWORD dwServiceNumber, ...)
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{
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CONFIGRET cr;
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HANDLE hCM;
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hCM = CreateFileA("\\\\.\\CONFIGMG",
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GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ|FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, 0, NULL);
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if (hCM != INVALID_HANDLE_VALUE) {
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DWORD dwRet;
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// Evil hack that works only on x86. Fortunately, this code is
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// inside an #ifdef _X86_ block, so we're safe.
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LPVOID pvArg = 1 + &dwServiceNumber;
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if (DeviceIoControl(hCM, dwServiceNumber, &pvArg, sizeof(pvArg),
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&cr, sizeof(cr), &dwRet, 0) &&
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dwRet == sizeof(cr)) {
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} else {
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TraceMsg(DM_WARNING, "CallConfigmg98: CONFIGMG did not respond");
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cr = CR_FAILURE;
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}
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CloseHandle(hCM);
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} else {
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TraceMsg(DM_WARNING, "CallConfigmg98: Couldn't connect to CONFIGMG");
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cr = CR_FAILURE;
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}
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return cr;
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}
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DWORD GetDockedState98()
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{
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CONFIGRET cr;
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DWORD Result = GMID_NOTDOCKABLE; // assume the worst
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HWPROFILEINFO_A HWProfileInfo;
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cr = CallConfigmg98(
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0x80000000 + LOWORD(CONFIGMG_Get_Hardware_Profile_Info),
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-1, // ulIndex, -1 means "current profile"
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&HWProfileInfo, // PHWPROFILEINFO
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0); // ulFlags
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if (cr == CR_SUCCESS) {
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Result = HWProfileInfo.HWPI_dwFlags;
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}
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return Result;
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}
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#endif
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typedef BOOL (WINAPI *GETCURRENTHWPROFILEA)(LPHW_PROFILE_INFOA);
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DWORD GetDockedStateNT()
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{
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HW_PROFILE_INFOA hpi;
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GETCURRENTHWPROFILEA GetCurrentHwProfileA;
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DWORD Result = GMID_NOTDOCKABLE; // assume the worst
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GetCurrentHwProfileA = (GETCURRENTHWPROFILEA)
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GetProcAddress(GetModuleHandle("ADVAPI32"),
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"GetCurrentHwProfileA");
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if (GetCurrentHwProfileA && GetCurrentHwProfileA(&hpi)) {
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Result = hpi.dwDockInfo & (DOCKINFO_UNDOCKED | DOCKINFO_DOCKED);
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// Wackiness: If the machine does not support docking, then
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// NT returns >both< flags set. Go figure.
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if (Result == (DOCKINFO_UNDOCKED | DOCKINFO_DOCKED)) {
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Result = GMID_NOTDOCKABLE;
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}
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} else {
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TraceMsg(DM_WARNING, "GetDockedStateNT: GetCurrentHwProfile failed");
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}
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return Result;
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}
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#if defined(_X86_) && !defined(UNIX)
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//
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// Platforms that support Win95/Win98 need to do version switching
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//
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DWORD GetDockedState()
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{
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if (g_bRunningOnNT) {
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return GetDockedStateNT();
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} else if (g_bRunningOnMemphis) {
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return GetDockedState98();
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} else {
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return GetDockedState95();
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}
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}
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#else
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//
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// Platforms that do not support Win95/Win98 can just call the NT version.
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//
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#define GetDockedState() GetDockedStateNT()
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#endif
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#ifndef UNIX
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/*****************************************************************************
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*
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* BATTERY STATE - Once again, Win95 and Win98 and NT all do it differently
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*
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*****************************************************************************/
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//
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// Values for SYSTEM_POWER_STATUS.ACLineStatus
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//
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#define SPSAC_OFFLINE 0
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#define SPSAC_ONLINE 1
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//
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// Values for SYSTEM_POWER_STATUS.BatteryFlag
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//
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#define SPSBF_NOBATTERY 128
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//
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// So many ways to detect batteries, so little time...
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//
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DWORD GetBatteryState()
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{
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//
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// Since GMIB_HASBATTERY is cumulative (any battery turns it on)
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// and GMIB_ONBATTERY is subtractive (any AC turns it off), the
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// state you have to start in before you find a battery is
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// GMIB_HASBATTERY off and GMIB_ONBATTERY on.
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//
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// dwResult & GMIB_ONBATTERY means we have yet to find AC power.
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// dwResult & GMIB_HASBATTERY means we have found a non-UPS battery.
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//
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DWORD dwResult = GMIB_ONBATTERY;
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//------------------------------------------------------------------
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//
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// First try - IOCTL_BATTERY_QUERY_INFORMATION
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//
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//------------------------------------------------------------------
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//
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// Windows 98 and Windows 2000 support IOCTL_BATTERY_QUERY_INFORMATION,
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// which lets us enumerate the batteries and ask each one for information.
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// Except that on Windows 98, we can enumerate only ACPI batteries.
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// We still have to use VPOWERD to enumerate APM batteries.
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// FEATURE -- deal with Win98 APM batteries
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HDEVINFO hdev = SetupDiGetClassDevs(&GUID_DEVICE_BATTERY, 0, 0,
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DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
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if (hdev != INVALID_HANDLE_VALUE) {
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SP_DEVICE_INTERFACE_DATA did;
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did.cbSize = sizeof(did);
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// Stop at 100 batteries so we don't go haywire
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for (int idev = 0; idev < 100; idev++) {
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// Pre-set the error code because our DLLLOAD wrapper doesn't
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// and Windows NT 4 supports SetupDiGetClassDevs but not
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// SetupDiEnumDeviceInterfaces (go figure).
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SetLastError(ERROR_NO_MORE_ITEMS);
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if (SetupDiEnumDeviceInterfaces(hdev, 0, &GUID_DEVICE_BATTERY, idev, &did)) {
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DWORD cbRequired = 0;
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/*
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* Ask for the required size then allocate it then fill it.
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*
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* Sigh. Windows NT and Windows 98 implement
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* SetupDiGetDeviceInterfaceDetail differently if you are
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* querying for the buffer size.
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*
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* Windows 98 returns FALSE, and GetLastError() returns
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* ERROR_INSUFFICIENT_BUFFER.
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*
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* Windows NT returns TRUE.
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*
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* So we allow the cases either where the call succeeds or
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* the call fails with ERROR_INSUFFICIENT_BUFFER.
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*/
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if (SetupDiGetDeviceInterfaceDetail(hdev, &did, 0, 0, &cbRequired, 0) ||
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GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
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PSP_DEVICE_INTERFACE_DETAIL_DATA pdidd;
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pdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)LocalAlloc(LPTR, cbRequired);
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if (pdidd) {
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pdidd->cbSize = sizeof(*pdidd);
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if (SetupDiGetDeviceInterfaceDetail(hdev, &did, pdidd, cbRequired, &cbRequired, 0)) {
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/*
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* Finally enumerated a battery. Ask it for information.
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*/
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HANDLE hBattery = CreateFile(pdidd->DevicePath,
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GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (hBattery != INVALID_HANDLE_VALUE) {
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/*
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* Now you have to ask the battery for its tag.
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*/
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BATTERY_QUERY_INFORMATION bqi;
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DWORD dwWait = 0;
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DWORD dwOut;
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bqi.BatteryTag = 0;
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if (DeviceIoControl(hBattery, IOCTL_BATTERY_QUERY_TAG,
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&dwWait, sizeof(dwWait),
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&bqi.BatteryTag, sizeof(bqi.BatteryTag),
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&dwOut, NULL) && bqi.BatteryTag) {
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/*
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* With the tag, you can query the battery info.
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*/
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BATTERY_INFORMATION bi;
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bqi.InformationLevel = BatteryInformation;
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bqi.AtRate = 0;
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if (DeviceIoControl(hBattery, IOCTL_BATTERY_QUERY_INFORMATION,
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&bqi, sizeof(bqi),
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&bi, sizeof(bi),
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&dwOut, NULL)) {
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// Only system batteries count
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if (bi.Capabilities & BATTERY_SYSTEM_BATTERY) {
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if (!(bi.Capabilities & BATTERY_IS_SHORT_TERM)) {
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dwResult |= GMIB_HASBATTERY;
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}
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/*
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* And then query the battery status.
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*/
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BATTERY_WAIT_STATUS bws;
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BATTERY_STATUS bs;
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ZeroMemory(&bws, sizeof(bws));
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bws.BatteryTag = bqi.BatteryTag;
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if (DeviceIoControl(hBattery, IOCTL_BATTERY_QUERY_STATUS,
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&bws, sizeof(bws),
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&bs, sizeof(bs),
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&dwOut, NULL)) {
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if (bs.PowerState & BATTERY_POWER_ON_LINE) {
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dwResult &= ~GMIB_ONBATTERY;
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}
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}
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}
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}
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}
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CloseHandle(hBattery);
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}
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}
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LocalFree(pdidd);
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}
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}
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} else {
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// Enumeration failed - perhaps we're out of items
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if (GetLastError() == ERROR_NO_MORE_ITEMS)
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break;
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}
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}
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SetupDiDestroyDeviceInfoList(hdev);
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}
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//
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// On Windows NT, SetupDi tells us everything there is to know.
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// So once you get this far, you're finished.
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//
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if (g_bRunningOnNT) {
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goto finish;
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}
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//------------------------------------------------------------------
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//
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// Second try - GetSystemPowerStatus
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//
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//------------------------------------------------------------------
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//
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// On Windows 9x, GetSystemPowerStatus enumerates a disjoint set of
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// batteries from SetupDi, so it's worth calling to find out.
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//
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SYSTEM_POWER_STATUS status;
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if (GetSystemPowerStatus(&status)) {
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//
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// HACKHACK: Some APM BIOS implementations set BatteryFlag = 0
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// instead of 128 or 255 when they don't have a
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// battery, so we have to check both.
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//
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if (status.BatteryFlag != 0 &&
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!(status.BatteryFlag & SPSBF_NOBATTERY)) {
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//
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// Found an APM battery.
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//
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dwResult |= GMIB_HASBATTERY;
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}
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if (status.ACLineStatus == SPSAC_ONLINE) {
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dwResult &= ~GMIB_ONBATTERY;
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}
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}
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#ifdef TRY_NtPowerInformation // Hopefully the Third Try won't be necessary
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SYSTEM_POWER_CAPABILITIES caps;
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//------------------------------------------------------------------
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//
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// Third try - NtPowerInformation
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//
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//------------------------------------------------------------------
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//
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// NtPowerInformation is supported on Win98 and Windows 2000, but not
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// Windows 95 or NT4.
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//
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if (SUCCEEDED(NtPowerInformation(SystemPowerCapabilities, NULL, 0,
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&caps, sizeof(caps)))) {
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if (caps.BatteriesAreShortTerm) {
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#error futz futz
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}
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if (caps.SystemBatteriesPresent && !fFoundUPS) {
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#error futz futz
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}
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}
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#endif // TRY_NtPowerInformation
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finish:
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//
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// Final cleanup: If we didn't find a battery, then presume that we
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// are on AC power.
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//
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if (!(dwResult & GMIB_HASBATTERY))
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dwResult &= ~GMIB_ONBATTERY;
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return dwResult;
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}
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||
|
/*****************************************************************************
|
||
|
*
|
||
|
* TERMINAL SERVER CLIENT
|
||
|
*
|
||
|
* This is particularly gruesome because Terminal Server for NT4 SP3 goes
|
||
|
* to extraordinary lengths to prevent you from detecting it. Even the
|
||
|
* semi-documented NtCurrentPeb()->SessionId trick doesn't work on NT4 SP3.
|
||
|
* So we have to go to the totally undocumented winsta.dll to find out.
|
||
|
*
|
||
|
*****************************************************************************/
|
||
|
|
||
|
BOOL g_fTSClient = -1; // Tri-state, 0 = no, 1 = yes, -1 = don't know
|
||
|
|
||
|
BOOL IsTSClientNT4(void)
|
||
|
{
|
||
|
BOOL fTS = FALSE; // Assume not
|
||
|
|
||
|
HINSTANCE hinstWinSta = LoadLibrary("winsta.dll");
|
||
|
if (hinstWinSta) {
|
||
|
PWINSTATIONQUERYINFORMATIONW WinStationQueryInformationW;
|
||
|
WINSTATIONINFORMATIONW wi;
|
||
|
WinStationQueryInformationW = (PWINSTATIONQUERYINFORMATIONW)
|
||
|
GetProcAddress(hinstWinSta, "WinStationQueryInformationW");
|
||
|
if (WinStationQueryInformationW &&
|
||
|
WinStationQueryInformationW(SERVERNAME_CURRENT, LOGONID_CURRENT, WinStationInformation, &wi, sizeof(wi), NULL) &&
|
||
|
wi.LogonId != 0) {
|
||
|
fTS = TRUE;
|
||
|
}
|
||
|
FreeLibrary(hinstWinSta);
|
||
|
}
|
||
|
|
||
|
return fTS;
|
||
|
}
|
||
|
|
||
|
BOOL IsTSClient(void)
|
||
|
{
|
||
|
if (!g_bRunningOnNT) {
|
||
|
// Windows 9x doesn't support Terminal Server
|
||
|
return FALSE;
|
||
|
} else if (g_bRunningOnNT5OrHigher) {
|
||
|
// NT5 has a new system metric to detect this
|
||
|
return GetSystemMetrics(SM_REMOTESESSION);
|
||
|
} else {
|
||
|
// NT4 is gross and evil. This is slow, so cache the result.
|
||
|
if (g_fTSClient < 0)
|
||
|
g_fTSClient = IsTSClientNT4();
|
||
|
return g_fTSClient;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*****************************************************************************
|
||
|
*
|
||
|
* SHGetMachineInfo
|
||
|
*
|
||
|
*****************************************************************************/
|
||
|
|
||
|
//
|
||
|
// SHGetMachineInfo
|
||
|
//
|
||
|
// Given an index, returns some info about that index. See shlwapi.w
|
||
|
// for documentation on the flags available.
|
||
|
//
|
||
|
STDAPI_(DWORD_PTR) SHGetMachineInfo(UINT gmi)
|
||
|
{
|
||
|
switch (gmi) {
|
||
|
case GMI_DOCKSTATE:
|
||
|
return GetDockedState();
|
||
|
|
||
|
case GMI_BATTERYSTATE:
|
||
|
return GetBatteryState();
|
||
|
|
||
|
//
|
||
|
// It smell like a laptop if it has a battery or if it can be docked.
|
||
|
//
|
||
|
case GMI_LAPTOP:
|
||
|
return (GetBatteryState() & GMIB_HASBATTERY) ||
|
||
|
(GetDockedState() != GMID_NOTDOCKABLE);
|
||
|
|
||
|
case GMI_TSCLIENT:
|
||
|
return IsTSClient();
|
||
|
}
|
||
|
|
||
|
TraceMsg(DM_WARNING, "SHGetMachineInfo: Unknown info query %d", gmi);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#else
|
||
|
|
||
|
STDAPI_(DWORD_PTR) SHGetMachineInfo(UINT gmi)
|
||
|
{
|
||
|
// IEUNIX : Stubbed out this api to resolve undefind symbol in linking.
|
||
|
TraceMsg(DM_WARNING, "SHGetMachineInfo: Unknown info query %d", gmi);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#endif
|