andre@603: /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
andre@603:  * Software engineering by Intevation GmbH
andre@603:  *
andre@603:  * This file is Free Software under the GNU GPL (v>=2)
andre@603:  * and comes with ABSOLUTELY NO WARRANTY!
andre@603:  * See LICENSE.txt for details. */
andre@603: 
andre@603: #ifdef WIN32
andre@603: #include "processhelp.h"
andre@603: #include "strhelp.h"
andre@603: 
andre@603: #include <windows.h>
andre@603: #include <tlhelp32.h>
andre@603: #include <psapi.h>
andre@603: #include <unistd.h>
andre@603: 
andre@603: #include <QDebug>
andre@603: 
andre@606: struct EnumWindowsStruct {
andre@606:     EnumWindowsStruct() : windowId(0) {}
andre@606:     DWORD pid;
andre@606:     HWND windowId;
andre@603: };
andre@603: 
andre@603: PSID copySid(PSID from)
andre@603: {
andre@606:     if (!from) {
andre@603:         return 0;
andre@603:     }
andre@603: 
andre@606:     int sidLength = GetLengthSid(from);
andre@606:     PSID to = (PSID) xmalloc(sidLength);
andre@603:     CopySid(sidLength, to, from);
andre@603:     return to;
andre@603: }
andre@603: 
andre@603: static PSID getProcessOwner(HANDLE hProcess)
andre@603: {
andre@603:     HANDLE hToken = NULL;
andre@603:     PSID sid;
andre@603: 
andre@603:     OpenProcessToken(hProcess, TOKEN_READ, &hToken);
andre@606:     if (hToken) {
andre@603:         DWORD size;
andre@603:         PTOKEN_USER userStruct;
andre@603: 
andre@603:         // check how much space is needed
andre@606:         GetTokenInformation(hToken, TokenUser, NULL, 0, &size);
andre@606:         if (ERROR_INSUFFICIENT_BUFFER == GetLastError()) {
andre@606:             userStruct = reinterpret_cast<PTOKEN_USER>(new BYTE[size]);
andre@606:             GetTokenInformation(hToken, TokenUser, userStruct, size, &size);
andre@603: 
andre@606:             sid = copySid(userStruct->User.Sid);
andre@606:             CloseHandle(hToken);
andre@603:             delete [] userStruct;
andre@603:             return sid;
andre@603:         }
andre@603:     }
andre@603:     return 0;
andre@603: }
andre@603: 
andre@603: BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
andre@603: {
andre@603:     if (GetWindowLong(hwnd, GWL_STYLE) & WS_VISIBLE) {
andre@603: 
andre@603:         DWORD pidwin;
andre@603: 
andre@603:         GetWindowThreadProcessId(hwnd, &pidwin);
andre@603:         if (pidwin == ((EnumWindowsStruct *)lParam)->pid) {
andre@603:             ((EnumWindowsStruct *)lParam)->windowId = hwnd;
andre@603:             return FALSE;
andre@603:         }
andre@603:     }
andre@603:     return TRUE;
andre@603: }
andre@603: 
andre@603: 
andre@603: static HANDLE getProcessHandle(int processID)
andre@603: {
andre@603:     return OpenProcess(SYNCHRONIZE |
andre@603:                        PROCESS_QUERY_INFORMATION |
andre@603:                        PROCESS_VM_READ |
andre@603:                        PROCESS_TERMINATE,
andre@603:                        false, processID);
andre@603: }
andre@603: 
andre@603: const QList<int> ProcessHelp::getProcessesIdForName(const QString &processName)
andre@603: {
andre@603:     HANDLE h;
andre@603:     PROCESSENTRY32 pe32;
andre@603:     QList <int> pids;
andre@603: 
andre@603:     h = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
andre@603:     if (h == INVALID_HANDLE_VALUE) {
andre@603:         return pids;
andre@603:     }
andre@603: 
andre@603:     pe32.dwSize = sizeof(PROCESSENTRY32); // Necessary according to MSDN
andre@603:     if (!Process32First(h, &pe32)) {
andre@603:         return pids;
andre@603:     }
andre@603: 
andre@603:     pids.clear();
andre@603: 
andre@608:     const QString processNameLower = processName.toLower().replace(".exe", "");
andre@608:     const QString processNameExe = processNameLower + ".exe";
andre@608: 
andre@603:     do {
andre@608:         const QString exeFile = QString::fromWCharArray(pe32.szExeFile).toLower();
andre@608:         if (exeFile == processNameLower || exeFile == processNameExe) {
andre@603:             PSID user_sid = getProcessOwner(GetCurrentProcess());
andre@606:             if (user_sid) {
andre@603:                 // Also check that we are the owner of that process
andre@603:                 HANDLE hProcess = getProcessHandle(pe32.th32ProcessID);
andre@606:                 if (!hProcess) {
andre@603:                     continue;
andre@603:                 }
andre@603: 
andre@603:                 PSID sid = getProcessOwner(hProcess);
andre@603:                 PSID userSid = getProcessOwner(GetCurrentProcess());
andre@606:                 if (!sid || (userSid && !EqualSid(userSid, sid))) {
andre@606:                     free(sid);
andre@603:                     continue;
andre@603:                 }
andre@603:             }
andre@603:             pids.append((int)pe32.th32ProcessID);
andre@603:             qDebug() << "found PID: " << (int)pe32.th32ProcessID;
andre@603:         }
andre@603:     } while (Process32Next(h, &pe32));
andre@606:     CloseHandle(h);
andre@603:     return pids;
andre@603: }
andre@603: 
andre@603: bool ProcessHelp::otherProcessesExist(const QString &processName)
andre@603: {
andre@603:     const QList<int> pids = getProcessesIdForName(processName);
andre@603:     int myPid = getpid();
andre@606:     foreach(int pid, pids) {
andre@603:         if (myPid != pid) {
andre@603:             qDebug() << "Found another process with id: " << pid;
andre@603:             return true;
andre@603:         }
andre@603:     }
andre@603:     return false;
andre@603: }
andre@603: 
andre@606: void ProcessHelp::activateWindowForProcess(const QString &executableName)
andre@606: {
andre@603:     const QList<int> pids = getProcessesIdForName(executableName);
andre@603:     int myPid = getpid();
andre@603:     int foundPid = 0;
andre@606:     foreach(int pid, pids) {
andre@603:         if (myPid != pid) {
andre@603:             qDebug() << "activateWindowForProcess(): PID to activate:" << pid;
andre@603:             foundPid = pid;
andre@603:             break;
andre@603:         }
andre@603:     }
andre@606:     if (foundPid == 0) {
andre@603:         return;
andre@603:     }
andre@603:     EnumWindowsStruct winStruct;
andre@603:     winStruct.pid = foundPid;
andre@606:     EnumWindows(EnumWindowsProc, (LPARAM)&winStruct);
andre@606:     if (winStruct.windowId == 0) {
andre@603:         return;
andre@603:     }
andre@606:     SetForegroundWindow(winStruct.windowId);
andre@603: }
andre@603: #endif // WIN32
andre@603: