/
display.c
373 lines (324 loc) · 10.9 KB
/
display.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
#include <tchar.h>
#include <windows.h>
#include <wingdi.h>
#include <winuser.h>
#include <Wtsapi32.h>
#include <userenv.h>
#include <TlHelp32.h>
#include <strsafe.h>
/* you have to change port number for your environment */
#define COMPORT _T("\\\\.\\COM4")
static VOID DebugMsg( LPCTSTR lpszFormat, ... );
static VOID WINAPI ServiceMain(DWORD , LPTSTR* );
static SERVICE_STATUS_HANDLE m_hStatus = NULL;
static HANDLE m_hStop = NULL;
#define SERVICE_NAME (TEXT("RotateDisplay"))
SERVICE_TABLE_ENTRY ServiceTable[] = {
{ SERVICE_NAME, ServiceMain },
{ NULL, NULL }
};
static VOID DebugMsg( LPCTSTR lpszFormat, ... )
{
va_list arg;
TCHAR buf[ 4096 ];
LPTSTR lpszEnd;
va_start( arg, lpszFormat );
if( StringCchVPrintfEx(
buf, _countof( buf ) - 3,
&lpszEnd, NULL, STRSAFE_IGNORE_NULLS, lpszFormat, arg ) == S_OK )
{
*lpszEnd++ = '\r';
*lpszEnd++ = '\n';
*lpszEnd = '\0';
OutputDebugString( buf );
}else{
OutputDebugString( lpszFormat );
}
va_end( arg );
}
static BOOL Rotate( int iDevNum, SHORT dmOrientation )
{
DISPLAY_DEVICE d;
DEVMODE dm;
int w;
LONG r;
ZeroMemory( &d, sizeof( d ) );
d.cb = sizeof( d );
if( !EnumDisplayDevices( NULL, iDevNum, &d, 0 ) ) {
DebugMsg( _T("EnumDisplayDevices failed:%d\r\n" ), GetLastError() );
return FALSE;
}
if( !EnumDisplaySettings( d.DeviceName, ENUM_CURRENT_SETTINGS, &dm ) ){
DebugMsg( _T("EnumDisplaySettings(\"%s\") failed:%d\r\n" ), d.DeviceName, GetLastError() );
return FALSE;
}
if( dm.dmDisplayOrientation == dmOrientation ) return TRUE;
w = dm.dmPelsHeight;
dm.dmPelsHeight = dm.dmPelsWidth;
dm.dmPelsWidth = w;
dm.dmDisplayOrientation = dmOrientation;
r = ChangeDisplaySettingsEx( d.DeviceName, &dm, NULL, CDS_UPDATEREGISTRY, NULL );
if( r != DISP_CHANGE_SUCCESSFUL ){
DebugMsg( _T("ChangeDisplaySettingsEx failed:%d\r\n"), r );
return FALSE;
}
return TRUE;
}
DWORD WINAPI HandlerEx ( DWORD dwControl, DWORD dwEventType, LPVOID lpEventData, LPVOID lpContext )
{
SERVICE_STATUS ss;
BOOL r;
ss.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
ss.dwWin32ExitCode = NO_ERROR;
ss.dwServiceSpecificExitCode = 0;
ss.dwCheckPoint = 0;
ss.dwWaitHint = 3000;
ss.dwControlsAccepted = SERVICE_ACCEPT_STOP;
UNREFERENCED_PARAMETER( dwControl );
UNREFERENCED_PARAMETER( dwEventType );
UNREFERENCED_PARAMETER( lpEventData );
UNREFERENCED_PARAMETER( lpContext );
switch( dwControl ){
case SERVICE_CONTROL_STOP:
ss.dwCurrentState = SERVICE_STOP_PENDING;
r = SetServiceStatus( m_hStatus, &ss );
if ( !r ) {
DebugMsg( _T("SetServiceStatus:%d"), GetLastError() );
break;
}
SetEvent( m_hStop );
break;
case SERVICE_CONTROL_SESSIONCHANGE:
case SERVICE_CONTROL_HARDWAREPROFILECHANGE:
break;
default:
return ERROR_CALL_NOT_IMPLEMENTED;
}
return NO_ERROR;
}
BOOL ExecMyself( LPCTSTR lpCommandLine )
{
DWORD dwSession, r;
HANDLE hToken;
LPVOID lpEnv;
STARTUPINFO startupInfo;
PROCESS_INFORMATION processInformation;
TCHAR szApplicationName[ 1024 ];
TCHAR szCommandLine[ 1024 ];
r = GetModuleFileName( NULL, szApplicationName, _countof( szApplicationName ) );
if( r == 0 || r >= _countof( szApplicationName ) ){
DebugMsg( _T("GetModuleFileName:%d"), GetLastError() );
return FALSE;
}
if( StringCchPrintf( szCommandLine, _countof( szCommandLine ), _T("\"%s\" %s"), szApplicationName, lpCommandLine ) != S_OK ) return FALSE;
dwSession = WTSGetActiveConsoleSessionId();
if( dwSession == 0xFFFFFFFF ){
DebugMsg( _T("WTSGetActiveConsoleSessionId:%d"), GetLastError() );
return FALSE;
}
if( !WTSQueryUserToken( dwSession, &hToken ) ){
DebugMsg( _T("WTSQueryUserToken:%d"), GetLastError() );
return FALSE;
}
if( !CreateEnvironmentBlock( &lpEnv, hToken, FALSE ) ){
DebugMsg( _T("CreateEnvironmentBlock:%d"), GetLastError() );
return FALSE;
}
ZeroMemory( &startupInfo, sizeof(STARTUPINFO) );
startupInfo.cb = sizeof(STARTUPINFO);
startupInfo.lpDesktop = _T( "winsta0\\default" );
if( !CreateProcessAsUser( hToken, szApplicationName, szCommandLine, NULL, NULL,
FALSE, CREATE_UNICODE_ENVIRONMENT, lpEnv, NULL, &startupInfo, &processInformation) )
{
DebugMsg( _T("CreateProcessAsUser:%d"), GetLastError() );
return FALSE;
}
CloseHandle(processInformation.hThread);
CloseHandle(processInformation.hProcess);
return TRUE;
}
static VOID WINAPI ServiceMain(DWORD dwArgc, LPTSTR* pszArgv)
{
DWORD r;
SERVICE_STATUS ss;
HANDLE hComm = INVALID_HANDLE_VALUE;
DWORD dwCommState = 0;
HANDLE hHandles[ 2 ];
OVERLAPPED ov;
UNREFERENCED_PARAMETER( dwArgc );
UNREFERENCED_PARAMETER( pszArgv );
ov.hEvent = NULL;
__try{
ss.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
ss.dwWin32ExitCode = NO_ERROR;
ss.dwServiceSpecificExitCode = 0;
ss.dwCheckPoint = 1;
ss.dwWaitHint = 1000;
ss.dwControlsAccepted = SERVICE_ACCEPT_STOP |
SERVICE_ACCEPT_SESSIONCHANGE ;
m_hStatus = RegisterServiceCtrlHandlerEx(
SERVICE_NAME, HandlerEx, NULL );
if( m_hStatus == 0 ){
DebugMsg( _T("RegisterServiceCtrlHandlerEx:%d" ), GetLastError() );
__leave;
}
ss.dwCurrentState = SERVICE_START_PENDING;
if( !SetServiceStatus( m_hStatus, &ss ) ){
DebugMsg( _T("SetServiceStatus:%d" ), GetLastError() );
__leave;
}
m_hStop = CreateEvent( NULL, TRUE, FALSE, NULL );
if( m_hStop == NULL ){
DebugMsg( _T("CreateEvent:%d"), GetLastError() );
__leave;
}
ZeroMemory( &ov, sizeof( ov ) );
ov.hEvent = CreateEvent( NULL, TRUE, TRUE, NULL );
if( ov.hEvent == NULL ){
DebugMsg( _T("CreateEvent:%d"), GetLastError() );
__leave;
}
hComm = CreateFile( COMPORT, GENERIC_READ | GENERIC_WRITE,
0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL );
if( hComm == INVALID_HANDLE_VALUE ){
DebugMsg( _T("CreateFile(\"%s\") failed:%d"), COMPORT, GetLastError() );
__leave;
}
hHandles[ 0 ] = m_hStop;
hHandles[ 1 ] = ov.hEvent;
ss.dwCurrentState = SERVICE_RUNNING;
ss.dwCheckPoint = 0;
ss.dwControlsAccepted = SERVICE_ACCEPT_STOP;
if( !SetServiceStatus( m_hStatus, &ss ) ){
DebugMsg( _T("SetServiceStatus:%d"), GetLastError() );
__leave;
}
EscapeCommFunction( hComm, SETDTR );
for(;;){
WaitCommEvent( hComm, &dwCommState, &ov );
r = WaitForMultipleObjects( 2, hHandles, FALSE, 30000 );
if( r == WAIT_OBJECT_0 ){
__leave;
}else if( r == WAIT_OBJECT_0 + 1 ){
if( GetCommModemStatus( hComm, &dwCommState ) ){
if( dwCommState & MS_DSR_ON ){
ExecMyself( _T("0") );
}else{
ExecMyself( _T("90") );
}
}
Sleep( 1000 );
}
EscapeCommFunction( hComm, SETDTR );
SetCommMask( hComm, EV_DSR );
ResetEvent( ov.hEvent );
}
}
__finally{
if( m_hStop != NULL ) CloseHandle( m_hStop );
if( hComm != INVALID_HANDLE_VALUE ) CloseHandle( hComm );
if( ov.hEvent != NULL ) CloseHandle( ov.hEvent );
ss.dwCurrentState = SERVICE_STOPPED;
ss.dwCheckPoint = 0;
ss.dwWaitHint = 0;
SetServiceStatus( m_hStatus, &ss );
}
}
typedef struct MYPROCESSENTRY32_tag{
PROCESSENTRY32 pe;
struct MYPROCESSENTRY32_tag *next;
} MYPROCESSENTRY32, *LPMYPROCESS32;
// Retrieve tha name of parent process. return length of the name in chars.
static DWORD GetParentProcessName( LPTSTR lpszBuf, DWORD cchBufSize )
{
HANDLE hSnap;
LPMYPROCESS32 ppe, ppe0;
DWORD dwPid, dwPPid;
size_t w;
DWORD r = 0;
ppe = (LPMYPROCESS32)LocalAlloc( LMEM_FIXED, sizeof( MYPROCESSENTRY32 ) );
ppe0 = ppe;
dwPid = GetCurrentProcessId(), dwPPid = 0;
hSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
if( hSnap == INVALID_HANDLE_VALUE ){
DebugMsg( _T("CreateToolhelp32Snapshot:%d"), GetLastError() );
return 0;
}
ZeroMemory( ppe, sizeof( MYPROCESSENTRY32 ) );
ppe->next = NULL;
ppe->pe.dwSize = sizeof( PROCESSENTRY32 );
if( Process32First( hSnap, &(ppe->pe) ) ){
for(;;){
LPMYPROCESS32 ppe2 = (LPMYPROCESS32)LocalAlloc( LMEM_FIXED, sizeof( MYPROCESSENTRY32 ) );
ZeroMemory( ppe2, sizeof( MYPROCESSENTRY32 ) );
ppe2->pe.dwSize = sizeof( PROCESSENTRY32 );
ppe2->next = NULL;
if( !Process32Next( hSnap, &(ppe->pe) ) ){
LocalFree( ppe2 );
break;
}
ppe->next = ppe2;
if( ppe->pe.th32ProcessID == dwPid ){
dwPPid = ppe->pe.th32ParentProcessID;
}
ppe = ppe2;
}
}
ppe = ppe0;
while( ppe != NULL ){
if( ppe->pe.th32ProcessID == dwPPid ){
StringCchCopy( lpszBuf, cchBufSize, ppe->pe.szExeFile );
if( StringCchLength( ppe->pe.szExeFile, MAX_PATH + 2, &w ) == NO_ERROR ){
r = w;
}
break;
}
ppe = ppe->next;
}
ppe = ppe0;
while( ppe != NULL ){
ppe0 = ppe->next;
LocalFree( ppe );
ppe = ppe0;;
}
CloseHandle( hSnap );
return r;
}
int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
TCHAR buf[ MAX_PATH ];
SHORT dmOrientation = DMDO_DEFAULT;
UNREFERENCED_PARAMETER( hInstance );
UNREFERENCED_PARAMETER( hPrevInstance );
UNREFERENCED_PARAMETER( lpCmdLine );
UNREFERENCED_PARAMETER( nCmdShow );
if( !GetParentProcessName( buf, _countof( buf ) ) ){
return FALSE;
}
if( lstrcmpi( _T("services.exe"), buf ) == 0 ){
// run as a service
if( !StartServiceCtrlDispatcher( ServiceTable )){
DebugMsg( _T("StartServiceCtrlDispatcher:%d"), GetLastError() );
return -1;
}
}else{
// run as a rotate command
if( lstrcmpA( lpCmdLine, "90" ) == 0 ){
dmOrientation = DMDO_90;
}else{
dmOrientation = DMDO_DEFAULT;
}
if( !GetSystemMetrics( SM_REMOTESESSION ) ){
Rotate( 1, dmOrientation );
}
}
if( !StartServiceCtrlDispatcher( ServiceTable )){
DebugMsg( _T("StartServiceCtrlDispatcher:%d"), GetLastError() );
}
return 0;
}