+// ----------------------------------------------------------------------------
+// env vars
+// ----------------------------------------------------------------------------
+
+bool wxGetEnv(const wxString& var, wxString *value)
+{
+#ifdef __WIN16__
+ const wxChar* ret = wxGetenv(var);
+ if ( !ret )
+ return FALSE;
+
+ if ( value )
+ {
+ *value = ret;
+ }
+
+ return TRUE;
+#else // Win32
+ // first get the size of the buffer
+ DWORD dwRet = ::GetEnvironmentVariable(var, NULL, 0);
+ if ( !dwRet )
+ {
+ // this means that there is no such variable
+ return FALSE;
+ }
+
+ if ( value )
+ {
+ (void)::GetEnvironmentVariable(var, value->GetWriteBuf(dwRet), dwRet);
+ value->UngetWriteBuf();
+ }
+
+ return TRUE;
+#endif // Win16/32
+}
+
+bool wxSetEnv(const wxString& var, const wxChar *value)
+{
+ // some compilers have putenv() or _putenv() or _wputenv() but it's better
+ // to always use Win32 function directly instead of dealing with them
+#if defined(__WIN32__)
+ if ( !::SetEnvironmentVariable(var, value) )
+ {
+ wxLogLastError(_T("SetEnvironmentVariable"));
+
+ return FALSE;
+ }
+
+ return TRUE;
+#else // no way to set env vars
+ return FALSE;
+#endif
+}
+
+// ----------------------------------------------------------------------------
+// process management
+// ----------------------------------------------------------------------------
+
+#ifdef __WIN32__
+
+// structure used to pass parameters from wxKill() to wxEnumFindByPidProc()
+struct wxFindByPidParams
+{
+ wxFindByPidParams() { hwnd = 0; pid = 0; }
+
+ // the HWND used to return the result
+ HWND hwnd;
+
+ // the PID we're looking from
+ DWORD pid;
+
+ DECLARE_NO_COPY_CLASS(wxFindByPidParams)
+};
+
+// wxKill helper: EnumWindows() callback which is used to find the first (top
+// level) window belonging to the given process
+BOOL CALLBACK wxEnumFindByPidProc(HWND hwnd, LPARAM lParam)
+{
+ DWORD pid;
+ (void)::GetWindowThreadProcessId(hwnd, &pid);
+
+ wxFindByPidParams *params = (wxFindByPidParams *)lParam;
+ if ( pid == params->pid )
+ {
+ // remember the window we found
+ params->hwnd = hwnd;
+
+ // return FALSE to stop the enumeration
+ return FALSE;
+ }
+
+ // continue enumeration
+ return TRUE;
+}
+
+#endif // __WIN32__
+
+int wxKill(long pid, wxSignal sig, wxKillError *krc)
+{
+#ifdef __WIN32__
+ // get the process handle to operate on
+ HANDLE hProcess = ::OpenProcess(SYNCHRONIZE |
+ PROCESS_TERMINATE |
+ PROCESS_QUERY_INFORMATION,
+ FALSE, // not inheritable
+ (DWORD)pid);
+ if ( hProcess == NULL )
+ {
+ if ( krc )
+ {
+ if ( ::GetLastError() == ERROR_ACCESS_DENIED )
+ {
+ *krc = wxKILL_ACCESS_DENIED;
+ }
+ else
+ {
+ *krc = wxKILL_NO_PROCESS;
+ }
+ }
+
+ return -1;
+ }
+
+ bool ok = TRUE;
+ switch ( sig )
+ {
+ case wxSIGKILL:
+ // kill the process forcefully returning -1 as error code
+ if ( !::TerminateProcess(hProcess, (UINT)-1) )
+ {
+ wxLogSysError(_("Failed to kill process %d"), pid);
+
+ if ( krc )
+ {
+ // this is not supposed to happen if we could open the
+ // process
+ *krc = wxKILL_ERROR;
+ }
+
+ ok = FALSE;
+ }
+ break;
+
+ case wxSIGNONE:
+ // do nothing, we just want to test for process existence
+ break;
+
+ default:
+ // any other signal means "terminate"
+ {
+ wxFindByPidParams params;
+ params.pid = (DWORD)pid;
+
+ // EnumWindows() has nice semantics: it returns 0 if it found
+ // something or if an error occured and non zero if it
+ // enumerated all the window
+ if ( !::EnumWindows(wxEnumFindByPidProc, (LPARAM)¶ms) )
+ {
+ // did we find any window?
+ if ( params.hwnd )
+ {
+ // tell the app to close
+ //
+ // NB: this is the harshest way, the app won't have
+ // opportunity to save any files, for example, but
+ // this is probably what we want here. If not we
+ // can also use SendMesageTimeout(WM_CLOSE)
+ if ( !::PostMessage(params.hwnd, WM_QUIT, 0, 0) )
+ {
+ wxLogLastError(_T("PostMessage(WM_QUIT)"));
+ }
+ }
+ else // it was an error then
+ {
+ wxLogLastError(_T("EnumWindows"));
+
+ ok = FALSE;
+ }
+ }
+ else // no windows for this PID
+ {
+ if ( krc )
+ {
+ *krc = wxKILL_ERROR;
+ }
+
+ ok = FALSE;
+ }
+ }
+ }
+
+ // the return code
+ DWORD rc;
+
+ if ( ok )
+ {
+ // as we wait for a short time, we can use just WaitForSingleObject()
+ // and not MsgWaitForMultipleObjects()
+ switch ( ::WaitForSingleObject(hProcess, 500 /* msec */) )
+ {
+ case WAIT_OBJECT_0:
+ // process terminated
+ if ( !::GetExitCodeProcess(hProcess, &rc) )
+ {
+ wxLogLastError(_T("GetExitCodeProcess"));
+ }
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unexpected WaitForSingleObject() return") );
+ // fall through
+
+ case WAIT_FAILED:
+ wxLogLastError(_T("WaitForSingleObject"));
+ // fall through
+
+ case WAIT_TIMEOUT:
+ if ( krc )
+ {
+ *krc = wxKILL_ERROR;
+ }
+
+ rc = STILL_ACTIVE;
+ break;
+ }
+ }
+ else // !ok
+ {
+ // just to suppress the warnings about uninitialized variable
+ rc = 0;
+ }
+
+ ::CloseHandle(hProcess);
+
+ // the return code is the same as from Unix kill(): 0 if killed
+ // successfully or -1 on error
+ if ( sig == wxSIGNONE )
+ {
+ if ( ok && rc == STILL_ACTIVE )
+ {
+ // there is such process => success
+ return 0;
+ }
+ }
+ else // not SIGNONE
+ {
+ if ( ok && rc != STILL_ACTIVE )
+ {
+ // killed => success
+ return 0;
+ }
+ }
+#else // Win16
+ wxFAIL_MSG( _T("not implemented") );
+#endif // Win32/Win16
+
+ // error
+ return -1;
+}
+
+// Execute a program in an Interactive Shell
+bool wxShell(const wxString& command)
+{
+ wxChar *shell = wxGetenv(wxT("COMSPEC"));
+ if ( !shell )
+ shell = (wxChar*) wxT("\\COMMAND.COM");
+
+ wxString cmd;
+ if ( !command )
+ {
+ // just the shell
+ cmd = shell;
+ }
+ else
+ {
+ // pass the command to execute to the command processor
+ cmd.Printf(wxT("%s /c %s"), shell, command.c_str());
+ }
+
+ return wxExecute(cmd, wxEXEC_SYNC) == 0;
+}
+
+// Shutdown or reboot the PC
+bool wxShutdown(wxShutdownFlags wFlags)
+{
+#ifdef __WIN32__
+ bool bOK = TRUE;
+
+ if ( wxGetOsVersion(NULL, NULL) == wxWINDOWS_NT ) // if is NT or 2K
+ {
+ // Get a token for this process.
+ HANDLE hToken;
+ bOK = ::OpenProcessToken(GetCurrentProcess(),
+ TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
+ &hToken) != 0;
+ if ( bOK )
+ {
+ TOKEN_PRIVILEGES tkp;
+
+ // Get the LUID for the shutdown privilege.
+ ::LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
+ &tkp.Privileges[0].Luid);
+
+ tkp.PrivilegeCount = 1; // one privilege to set
+ tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+
+ // Get the shutdown privilege for this process.
+ ::AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
+ (PTOKEN_PRIVILEGES)NULL, 0);
+
+ // Cannot test the return value of AdjustTokenPrivileges.
+ bOK = ::GetLastError() == ERROR_SUCCESS;
+ }
+ }
+
+ if ( bOK )
+ {
+ UINT flags = EWX_SHUTDOWN | EWX_FORCE;
+ switch ( wFlags )
+ {
+ case wxSHUTDOWN_POWEROFF:
+ flags |= EWX_POWEROFF;
+ break;
+
+ case wxSHUTDOWN_REBOOT:
+ flags |= EWX_REBOOT;
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unknown wxShutdown() flag") );
+ return FALSE;
+ }
+
+ bOK = ::ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE | EWX_REBOOT, 0) != 0;
+ }
+
+ return bOK;
+#else // Win16
+ return FALSE;
+#endif // Win32/16
+}
+
+// ----------------------------------------------------------------------------
+// misc
+// ----------------------------------------------------------------------------
+
+// Get free memory in bytes, or -1 if cannot determine amount (e.g. on UNIX)
+long wxGetFreeMemory()
+{
+#if defined(__WIN32__) && !defined(__BORLANDC__) && !defined(__TWIN32__)
+ MEMORYSTATUS memStatus;
+ memStatus.dwLength = sizeof(MEMORYSTATUS);
+ GlobalMemoryStatus(&memStatus);
+ return memStatus.dwAvailPhys;
+#else
+ return (long)GetFreeSpace(0);
+#endif
+}
+
+unsigned long wxGetProcessId()
+{
+#ifdef __WIN32__
+ return ::GetCurrentProcessId();
+#else
+ return 0;
+#endif
+}
+
+// Emit a beeeeeep
+void wxBell()
+{
+ ::MessageBeep((UINT)-1); // default sound
+}
+
+wxString wxGetOsDescription()
projects / wxWidgets.git / blobdiff