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windows-nt/Source/XPSP1/NT/shell/osshell/accessib/utilman/umanclnt.c
CryptoAlgo Inc b3cac27891 Add source files
2020-09-26 16:20:57 +08:00

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// ----------------------------------------------------------------------------
//
// UManClnt.c
//
// Utility Manager client depending code (used by UtilMan and UManDlg)
//
// Author: J. Eckhardt, ECO Kommunikation
// Copyright (c) 1997-1999 Microsoft Corporation
//
// History: created oct-98 by JE
// JE nov-15-98: removed any code related to key hook
// YX may-27-99: functions to start apps under current user account
// YX may-29-99: apps start under user account even from LogOn desktop,
// if possible
// YX jun-04-99: code to report the app processes status even if they
// have been started outside Utilman
// YX jun-23-99: IsAdmin function added (used in the dialog)
// Bug Fixes and Changes Anil Kumar 1999
// ----------------------------------------------------------------------------
#include <windows.h>
#include <TCHAR.h>
#include <WinSvc.h>
#include "_UMTool.h"
#include "w95trace.c"
#include "UtilMan.h"
#include "_UMClnt.h"
#include "ums_ctrl.h"
#include "w95trace.h"
// Handle to the utilman instance that is showing UI
HANDLE g_hUIProcess = 0;
// From Terminal services
extern BOOL GetWinStationUserToken(ULONG, PHANDLE);
// Private User function that returns user token for session 0 only
HANDLE GetCurrentUserTokenW( WCHAR WinSta[], DWORD desiredAccess);
#include <psapi.h>
#define MAX_NUMBER_OF_PROCESSES 2048
//
// RunningInMySession - returns TRUE if the specified process ID is
// running in the same session as UtilMan. In Whistler, with terminal
// services integrated, UtilMan is able to get information about
// processes that are not running in the same session. We must
// avoid impacting these processes.
//
BOOL RunningInMySession(DWORD dwProcessId)
{
DWORD dwSessionId = -1;
static DWORD dwMySessionId = -1;
if (-1 == dwMySessionId)
{
ProcessIdToSessionId(GetCurrentProcessId(), &dwMySessionId);
}
ProcessIdToSessionId(dwProcessId, &dwSessionId);
return (dwSessionId == dwMySessionId)?TRUE:FALSE;
}
// These are for compiling with irnotig.lib
// To be REMOVED once that becomes an API of advapi.lib
PVOID MIDL_user_allocate(IN size_t BufferSize)
{
return( LocalAlloc(0, BufferSize));
}
VOID MIDL_user_free(IN PVOID Buffer)
{
LocalFree( Buffer );
}
BOOL StartAppAsUser( LPCTSTR appPath,
LPTSTR cmdLine,
LPSTARTUPINFO lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation);
BOOL GetApplicationProcessInfo(umclient_tsp tspClient, BOOL fCloseHandle);
BOOL CloseAllWindowsByProcessID(DWORD procID);
// ---------------------------------
static BOOL ErrorOnLaunch(umclient_tsp client);
// ---------------------------------
BOOL StartClient(HWND hParent,umclient_tsp client)
{
if (client->runCount >= client->machine.MaxRunCount)
{
DBPRINTF(_TEXT("StartClient run count >= max run count\r\n"));
return FALSE;
}
switch (client->machine.ApplicationType)
{
case APPLICATION_TYPE_APPLICATION:
{
BOOL fStarted;
TCHAR ApplicationPath[MAX_APPLICATION_PATH_LEN+100];
if (!GetClientApplicationPath(
client->machine.ApplicationName
, ApplicationPath
, MAX_APPLICATION_PATH_LEN))
{
return FALSE;
}
fStarted = StartApplication(ApplicationPath
, UTILMAN_STARTCLIENT_ARG
, client->user.fCanRunSecure
, &client->processID[client->runCount]
, &client->hProcess[client->runCount]
, &client->mainThreadID[client->runCount]);
if (!fStarted)
{
ErrorOnLaunch(client);
return FALSE;
}
client->runCount++;
client->state = UM_CLIENT_RUNNING;
break;
}
case APPLICATION_TYPE_SERVICE:
{
DWORD i = 0;
SERVICE_STATUS ssStatus;
SC_HANDLE hService;
TCHAR arg2[200];
LPTSTR args[2];
SC_HANDLE hSCM = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (!hSCM)
return FALSE;
hService = OpenService(hSCM, client->machine.ApplicationName, SERVICE_ALL_ACCESS);
CloseServiceHandle(hSCM);
if (!hService)
{
ErrorOnLaunch(client);
return FALSE;
}
arg2[0] = 0;
args[0] = UTILMAN_STARTCLIENT_ARG;
args[1] = arg2;
if (!StartService(hService,1,args))
{
CloseServiceHandle(hService);
ErrorOnLaunch(client);
return FALSE;
}
Sleep(1000);
while(QueryServiceStatus(hService, &ssStatus))
{
if (ssStatus.dwCurrentState == SERVICE_RUNNING)
break;
Sleep(1000);
i++;
if (i >= 60)
break;
}
if (ssStatus.dwCurrentState != SERVICE_RUNNING)
{
CloseServiceHandle(hService);
ErrorOnLaunch(client);
return FALSE;
}
CloseServiceHandle(hService);
client->runCount++;
client->processID[0] = 0;
client->mainThreadID[0] = 0;
client->hProcess[0] = NULL;
client->state = UM_CLIENT_RUNNING;
break;
}
default:
return FALSE;
}
return TRUE;
}
// ---------------------------------
// The hParent window is used to signal whether the stop is interactive
// (and thus WM_COLSE could be used) or is a reaction to the desktop
// change
BOOL StopClient(umclient_tsp client)
{
if (!client->runCount)
return FALSE;
switch (client->machine.ApplicationType)
{
case APPLICATION_TYPE_APPLICATION:
{
DWORD j, runCount = client->runCount;
for (j = 0; j < runCount; j++)
{
// If client was started outside UtilMan then try to get its process ID
if (client->mainThreadID[j] == 0)
{
if (!GetApplicationProcessInfo(client, FALSE))
{
// could not find the client, so prevent attempts to stop it
client->hProcess[j] = NULL;
}
}
if (client->hProcess[j])
{
// Try to close the application by sending a WM_CLOSE message to
// all the windows in opened by the process. Then just kill it.
BOOL sent = CloseAllWindowsByProcessID(client->processID[j]);
if (!sent)
{
TerminateProcess(client->hProcess[j],1);
}
client->processID[j] = 0;
CloseHandle(client->hProcess[j]);
client->hProcess[j] = NULL;
client->mainThreadID[j] = 0;
client->runCount--;
if (!client->runCount)
client->state = UM_CLIENT_NOT_RUNNING;
}
}
if (runCount != client->runCount)
{
for (j = 0; j < (runCount-1); j++)
{
if (!client->hProcess[j])
{
memcpy(&client->processID[j], &client->processID[j+1],sizeof(DWORD)*(runCount-j-1));
memcpy(&client->hProcess[j], &client->hProcess[j+1],sizeof(HANDLE)*(runCount-j-1));
memcpy(&client->mainThreadID[j], &client->mainThreadID[j+1],sizeof(DWORD)*(runCount-j-1));
}
}
}
break;
}
case APPLICATION_TYPE_SERVICE:
{
SERVICE_STATUS ssStatus;
SC_HANDLE hService;
SC_HANDLE hSCM = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (!hSCM)
return FALSE;
hService = OpenService(hSCM, client->machine.ApplicationName, SERVICE_ALL_ACCESS);
CloseServiceHandle(hSCM);
if (!hService)
return FALSE;
if (ControlService(hService, SERVICE_CONTROL_STOP, &ssStatus))
{
DWORD i = 0;
Sleep(1000);
while(QueryServiceStatus(hService, &ssStatus))
{
if (ssStatus.dwCurrentState == SERVICE_STOPPED)
break;
Sleep(1000);
i++;
if (i >= 60)
break;
}
if (ssStatus.dwCurrentState != SERVICE_STOPPED)
{
CloseServiceHandle(hService);
return FALSE;
}
}
CloseServiceHandle(hService);
client->runCount--;
client->processID[0] = 0;
client->hProcess[0] = NULL;
client->mainThreadID[0] = 0;
if (!client->runCount)
client->state = UM_CLIENT_NOT_RUNNING;
break;
}
default:
return FALSE;
}
return TRUE;
}//StopClient
// ---------------------------------
static BOOL ErrorOnLaunch(umclient_tsp client)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
BOOL r;
TCHAR ErrorOnLaunch[MAX_APPLICATION_PATH_LEN];
if (!GetClientErrorOnLaunch(client->machine.ApplicationName, ErrorOnLaunch,MAX_APPLICATION_PATH_LEN))
return FALSE;
if (!ErrorOnLaunch[0])
return FALSE;
memset(&si,0,sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
memset(&pi,0,sizeof(PROCESS_INFORMATION));
// Assumption: Trusted applications that can run in secure mode won't define
// an "ErrorOnLaunch" reg key therefore we won't create this dialog as SYSTEM.
r = CreateProcess(ErrorOnLaunch,NULL,NULL,NULL,FALSE,
CREATE_DEFAULT_ERROR_MODE,//|NORMAL_PRIORITY_CLASS
NULL,NULL,&si,&pi);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return r;
}//ErrorOnLaunch
// ---------------------------------
BOOL GetClientApplicationPath(LPTSTR ApplicationName, LPTSTR ApplicationPath,DWORD len)
{
HKEY hKey, sKey;
DWORD ec, slen,type;
ec = RegOpenKeyEx(HKEY_LOCAL_MACHINE, UM_REGISTRY_KEY,0,KEY_READ,&hKey);
if (ec != ERROR_SUCCESS)
return FALSE;
ec = RegOpenKeyEx(hKey,ApplicationName,0,KEY_READ,&sKey);
if (ec != ERROR_SUCCESS)
{
RegCloseKey(hKey);
return FALSE;
}
slen = sizeof(TCHAR)*len;
ec = RegQueryValueEx(sKey,UMR_VALUE_PATH,NULL,&type,(LPBYTE)ApplicationPath,&slen);
if ((ec != ERROR_SUCCESS) || (type != REG_SZ))
{
RegCloseKey(sKey);
RegCloseKey(hKey);
return FALSE;
}
RegCloseKey(sKey);
RegCloseKey(hKey);
return (slen)?TRUE:FALSE;
}//GetClientApplicationPath
// ---------------------------------
BOOL GetClientErrorOnLaunch(LPTSTR ApplicationName, LPTSTR ErrorOnLaunch,DWORD len)
{
HKEY hKey, sKey;
DWORD ec, slen,type;
ec = RegOpenKeyEx(HKEY_LOCAL_MACHINE, UM_REGISTRY_KEY,0,KEY_READ,&hKey);
if (ec != ERROR_SUCCESS)
return FALSE;
ec = RegOpenKeyEx(hKey,ApplicationName,0,KEY_READ,&sKey);
if (ec != ERROR_SUCCESS)
{
RegCloseKey(hKey);
return FALSE;
}
slen = sizeof(TCHAR)*len;
ec = RegQueryValueEx(sKey,UMR_VALUE_EONL,NULL,&type,(LPBYTE)ErrorOnLaunch,&len);
if ((ec != ERROR_SUCCESS) || (type != REG_SZ))
{
RegCloseKey(sKey);
RegCloseKey(hKey);
return FALSE;
}
RegCloseKey(sKey);
RegCloseKey(hKey);
return TRUE;
}
BOOL TestServiceClientRuns(umclient_tsp client,SERVICE_STATUS *ssStatus)
{
SC_HANDLE hService;
SC_HANDLE hSCM = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (!hSCM)
return FALSE;
hService = OpenService(hSCM, client->machine.ApplicationName, SERVICE_ALL_ACCESS);
CloseServiceHandle(hSCM);
if (!hService)
return FALSE;
if (!QueryServiceStatus(hService, ssStatus) ||
(ssStatus->dwCurrentState == SERVICE_STOPPED))
{
CloseServiceHandle(hService);
return FALSE;
}
CloseServiceHandle(hService);
return TRUE;
}
//
// CheckStatus - Called from utilman's main timer and the dialog's timer
// to detect the state of running applications and pick up
// any that are started outside of utilman.
//
// Returns: TRUE if the state of any application has changed else FALSE
//
BOOL CheckStatus(umclient_tsp c, DWORD cClients)
{
DWORD i;
BOOL fAnyChanges = FALSE;
for (i = 0; i < cClients; i++)
{
// detect the client process started outside UMan
if ( (!c[i].runCount))
{
if (GetApplicationProcessInfo(&c[i], TRUE))
{
fAnyChanges = TRUE;
}
}
// detect clients not running anymore or not responding
switch (c[i].machine.ApplicationType)
{
case APPLICATION_TYPE_APPLICATION:
{
DWORD j, dwRunCount = c[i].runCount;
for (j = 0; j < dwRunCount; j++)
{
// step 1: test if terminated
if (!GetProcessVersion(c[i].processID[j]))
{
c[i].runCount--;
c[i].hProcess[j] = NULL;
c[i].processID[j] = 0;
c[i].mainThreadID[j] = 0;
c[i].state = UM_CLIENT_NOT_RUNNING;
c[i].user.fRestartOnDefaultDesk = FALSE;
fAnyChanges = TRUE;
continue; // its not running anymore
}
// step 2: test if responding (only processes started by utilman - mainThreadID != 0)
if (c[i].mainThreadID[j] != 0)
{
if (!PostThreadMessage(c[i].mainThreadID[j],WM_QUERYENDSESSION,0,ENDSESSION_LOGOFF))
{
c[i].state = UM_CLIENT_NOT_RESPONDING;
fAnyChanges = TRUE;
continue; // its not responding
}
}
if (c[i].state != UM_CLIENT_RUNNING)
{
fAnyChanges = TRUE;
}
c[i].state = UM_CLIENT_RUNNING;
}
if (dwRunCount != c[i].runCount)
{
for (j = 0; j < (dwRunCount-1); j++)
{
if (!c[i].processID[j])
{
memcpy(&c[i].processID[j], &c[i].processID[j+1],sizeof(DWORD)*(dwRunCount-j-1));
memcpy(&c[i].hProcess[j], &c[i].hProcess[j+1],sizeof(HANDLE)*(dwRunCount-j-1));
memcpy(&c[i].mainThreadID[j], &c[i].mainThreadID[j+1],sizeof(DWORD)*(dwRunCount-j-1));
}
}
}
break;
}
case APPLICATION_TYPE_SERVICE:
{
SERVICE_STATUS ssStatus;
if (!TestServiceClientRuns(&c[i],&ssStatus))
{
c[i].runCount--;
c[i].processID[0] = 0;
c[i].mainThreadID[0] = 0;
c[i].state = UM_CLIENT_NOT_RUNNING;
fAnyChanges = TRUE;
}
break;
}
}
}
return fAnyChanges;
}
__inline DWORD GetCurrentSession()
{
static DWORD dwSessionId = -1;
if (-1 == dwSessionId)
{
ProcessIdToSessionId(GetCurrentProcessId(), &dwSessionId);
}
return dwSessionId;
}
// GetUserAccessToken - return the logged on user's access token
//
// If fNeedImpersonationToken is true the token will be an
// impersonation token otherwise it will be a primary token.
// The returned token will be 0 if security calls fail.
//
// Notes: Caller must call CloseHandle on the returned handle.
//
HANDLE GetUserAccessToken(BOOL fNeedImpersonationToken, BOOL *fError)
{
HANDLE hUserToken = 0;
HANDLE hImpersonationToken = 0;
*fError = FALSE;
if (!GetWinStationUserToken(GetCurrentSession(), &hImpersonationToken))
{
// Call private API in the case where terminal services aren't running
HANDLE hPrimaryToken = 0;
DWORD dwFlags = TOKEN_QUERY | TOKEN_DUPLICATE;
dwFlags |= (fNeedImpersonationToken)? TOKEN_IMPERSONATE : TOKEN_ASSIGN_PRIMARY;
hPrimaryToken = GetCurrentUserTokenW (L"WinSta0", dwFlags);
// GetCurrentUserTokenW returns a primary token; turn
// it into an impersonation token if needed
if (hPrimaryToken && fNeedImpersonationToken)
{
if (!DuplicateToken(hPrimaryToken, SecurityImpersonation, &hUserToken))
{
*fError = TRUE;
DBPRINTF(TEXT("GetUserAccessToken: DuplicateToken returned %d\r\n"), GetLastError());
}
CloseHandle(hPrimaryToken);
} else
{
// otherwise, give out the primary token even if NULL
hUserToken = hPrimaryToken;
}
}
else
{
// Terminal services are running see if we need primary token
if (hImpersonationToken && !fNeedImpersonationToken)
{
if (!DuplicateTokenEx(hImpersonationToken, 0, NULL
, SecurityImpersonation, TokenPrimary, &hUserToken))
{
*fError = TRUE;
DBPRINTF(TEXT("GetUserAccessToken: DuplicateTokenEx returned %d\r\n"), GetLastError());
}
CloseHandle(hImpersonationToken);
} else
{
// otherwise, give out the impersonation token even if NULL
hUserToken = hImpersonationToken;
}
}
return hUserToken;
}
// StartAppAsUser - start the app in the context of the logged on user
//
BOOL StartAppAsUser( LPCTSTR appPath, LPTSTR cmdLine,
LPSTARTUPINFO lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation)
{
HANDLE hNewToken = 0;
BOOL fStarted = FALSE;
BOOL fError;
// Get the our process's primary token (only succeeds if we are SYSTEM)
hNewToken = GetUserAccessToken(FALSE, &fError);
if (hNewToken)
{
// running in system context so impersonate the logged on user
fStarted = CreateProcessAsUser( hNewToken, appPath,
cmdLine, 0, 0, FALSE,
NORMAL_PRIORITY_CLASS , 0, 0,
lpStartupInfo, lpProcessInformation );
CloseHandle( hNewToken );
DBPRINTF(TEXT("StartAppAsUser: CreateProcessAsUser(%s, %s) returns %d\r\n"), appPath, cmdLine, fStarted);
}
else if (IsInteractiveUser())
{
// Running in interactive user's context, just do normal create. Since
// we are the interactive user default security descriptors will do.
fStarted = CreateProcess(appPath, UTILMAN_STARTCLIENT_ARG
, NULL, NULL, FALSE, CREATE_DEFAULT_ERROR_MODE
, NULL, NULL, lpStartupInfo, lpProcessInformation);
DBPRINTF(TEXT("StartAppAsUser: CreateProcess(%s, %s) returns %d\r\n"), appPath, UTILMAN_STARTCLIENT_ARG, fStarted);
}
// caller is going to close handles
return fStarted;
}
// Functions to detect running copies of Accessibility utilities
// FindProcess - Searches the running processes by application name. If found,
// returns the process id. Else returns zero. If the process
// id is returned then phProcess is the process handle. The
// caller must close the process handle.
//
// pszApplicationName [in] - application as base.ext
// phProcess [out] - pointer to memory to receive process handle
//
// returns the process Id.
//
DWORD FindProcess(LPCTSTR pszApplicationName, HANDLE *phProcess)
{
DWORD dwProcId = 0;
DWORD adwProcess[MAX_NUMBER_OF_PROCESSES]; // array to receive the process identifiers
DWORD cProcesses;
DWORD dwThisProcess = GetCurrentProcessId();
unsigned int i;
*phProcess = 0;
// Get IDs of all running processes
if (!EnumProcesses(adwProcess, sizeof(adwProcess), &cProcesses))
return 0;
// cProcesses is returned as bytes; convert to number of processes
cProcesses = cProcesses/sizeof(DWORD);
// open each process and test against pszApplicationName
for (i = 0; i < cProcesses; i++)
{
HANDLE hProcess;
//
// EnumProcesses returns process IDs across all sessions but
// we are only interested in processes in our session
//
if (!RunningInMySession(adwProcess[i]))
continue;
// Skip this process
if (dwThisProcess == adwProcess[i])
continue;
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ
, FALSE, adwProcess[i]);
if (hProcess != NULL)
{
HMODULE hMod;
TCHAR szProcessName[MAX_PATH];
DWORD ccbProcess;
// find the module handle of exe of this process then it's base name (name.ext)
if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &ccbProcess) )
{
DWORD ctch = GetModuleBaseName(hProcess, hMod, szProcessName, MAX_PATH);
if (ctch && _wcsicmp(szProcessName, pszApplicationName) == 0)
{
*phProcess = hProcess; // found it
dwProcId = adwProcess[i];
break;
}
}
CloseHandle(hProcess);
}
}
return dwProcId;
}
// GetApplicationProcessInfo - Tries to find the process running for this application
BOOL GetApplicationProcessInfo(umclient_tsp tspClient, BOOL fCloseHandle)
{
DWORD dwProcId;
HANDLE hProcess;
TCHAR ApplicationPath[MAX_PATH];
TCHAR szDrive[_MAX_DRIVE];
TCHAR szPath[_MAX_PATH];
TCHAR szName[_MAX_FNAME+_MAX_EXT];
TCHAR szExt[_MAX_EXT];
if (GetClientApplicationPath(tspClient->machine.ApplicationName, ApplicationPath, MAX_PATH))
{
// ApplicationPath may include path information but we need just the base name
_wsplitpath(ApplicationPath, szDrive, szPath, szName, szExt);
lstrcat(szName, szExt);
dwProcId = FindProcess(szName, &hProcess);
if (dwProcId)
{
tspClient->processID[0] = dwProcId;
// I do not know how to get main thread ID
tspClient->mainThreadID[0] = 0;
tspClient->runCount = 1;
tspClient->state = UM_CLIENT_RUNNING;
// In order to keep the HANDLE usable, we may have to keep it open.
// So, we do not close it here, but I consider it relatively safe,
// since we cannot execute this code more than once without
// terminating the process first (and thus closing the handle)
if (fCloseHandle)
{
CloseHandle(hProcess);
tspClient->hProcess[0] = NULL;
} else
{
tspClient->hProcess[0] = hProcess;
}
return TRUE; // the application is running
}
}
return FALSE; // the application is not running
}
// YX 06-15-99 [
// Code to finid the window by its Process ID
static BOOL SentClose;
BOOL CALLBACK FindWindowByID(HWND hWnd, LPARAM lParam)
{
DWORD procID;
if (GetWindowThreadProcessId(hWnd, &procID) != 0)
{
if (procID == (DWORD)lParam)
{
// The process, We are looking for
// Send a message to close this window
// CAUTION: A SendMessage is Synchronous, So It will freeze UM if the
// message doenot return so PostMessage is safer or a SendMessageTimeout()
// PostMessage is sufficient....
PostMessage(hWnd, WM_CLOSE, 0, 0);
SentClose = TRUE;
}
}
return TRUE;
}
BOOL CloseAllWindowsByProcessID(DWORD procID)
{
BOOL rc = FALSE;
SentClose = FALSE;
rc = EnumWindows(FindWindowByID, (LPARAM)procID);
return SentClose;
}
// IsAdmin - Returns TRUE if our process has admin priviliges else FALSE
//
BOOL IsAdmin()
{
BOOL fStatus = FALSE;
BOOL fIsAdmin = FALSE;
PSID AdministratorsSid = AdminSid(TRUE);
if (AdministratorsSid)
{
fStatus = CheckTokenMembership(NULL, AdministratorsSid, &fIsAdmin);
}
return (fStatus && fIsAdmin);
}
// IsInteractiveUser - Returns TRUE if our process has an Interactive User SID
//
BOOL IsInteractiveUser()
{
BOOL fStatus = FALSE;
BOOL fIsInteractiveUser = FALSE;
PSID psidInteractive = InteractiveUserSid(TRUE);
if (psidInteractive)
{
fStatus = CheckTokenMembership(NULL, psidInteractive, &fIsInteractiveUser);
}
return (fStatus && fIsInteractiveUser);
}
// IsSystem - Returns TRUE if our process is running as SYSTEM
//
BOOL IsSystem()
{
BOOL fStatus = FALSE;
BOOL fIsLocalSystem = FALSE;
SID_IDENTIFIER_AUTHORITY siaLocalSystem = SECURITY_NT_AUTHORITY;
PSID psidSystem = SystemSid(TRUE);
if (psidSystem)
{
fStatus = CheckTokenMembership(NULL, psidSystem, &fIsLocalSystem);
}
return (fStatus && fIsLocalSystem);
}
BOOL StartApplication(
LPTSTR pszPath, // IN path + filename of application to start
LPTSTR pszArg, // IN command line argument(s)
BOOL fIsTrusted, // IN TRUE if app can run on secure desktop
DWORD *pdwProcessId, // OUT if not NULL, returned process Id
HANDLE *phProcess, // OUT if not NULL, returned process handle (caller must close)
DWORD *pdwThreadId // OUT if not NULL, returned thread Id
)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
desktop_ts desktop;
BOOL fStarted;
memset(&si,0,sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
memset(&pi,0,sizeof(PROCESS_INFORMATION));
QueryCurrentDesktop(&desktop, TRUE);
DBPRINTF(TEXT("StartApplication: pszPath=%s pszArg=%s fIsTrusted=%d Utilman is SYSTEM=%d\r\n"), pszPath, pszArg, fIsTrusted, IsSystem());
// If not on the winlogon desktop, first try starting the app as the interactive
// user. If that fails (eg. the case when OOBE runs after setup when there is
// no interactive user) then, if its the winlogon desktop or utilman is running
// SYSTEM and the app is trusted then use CreateProcess (the app will be running
// as SYSTEM). The latter case (running SYSTEM and the app is trusted allows
// applets to run when OOBE is running.
fStarted = FALSE;
if (desktop.type != DESKTOP_WINLOGON)
{
si.lpDesktop = desktop.name;
fStarted = StartAppAsUser(pszPath, pszArg, &si,&pi);
}
if (!fStarted && (desktop.type == DESKTOP_WINLOGON || (IsSystem() && fIsTrusted)))
{
if (fIsTrusted)
{
si.lpDesktop = 0;
// Since we only run trusted apps we can run with default security descriptor
fStarted = CreateProcess(pszPath, pszArg, NULL, NULL, FALSE,
CREATE_DEFAULT_ERROR_MODE, NULL, NULL, &si, &pi);
DBPRINTF(TEXT("StartApplication: trusted CreateProcess(%s, %s) returns %d\r\n"), pszPath, pszArg, fStarted);
}
}
if (fStarted)
{
if (pdwProcessId)
{
*pdwProcessId = pi.dwProcessId;
}
if (phProcess)
{
*phProcess = pi.hProcess;
}
else
{
CloseHandle(pi.hProcess);
}
if (pdwThreadId)
{
*pdwThreadId = pi.dwThreadId;
}
CloseHandle(pi.hThread);
}
return fStarted;
}
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