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annotate ui/processhelp_win.cpp @ 658:ac5c0ad4dd04

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author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 25 Jun 2014 15:31:23 +0200
parents 81a44b93229e
children 175370634226
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details. */
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7
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8 #ifdef WIN32
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9 #include "processhelp.h"
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10 #include "strhelp.h"
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11
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12 #include <windows.h>
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13 #include <tlhelp32.h>
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14 #include <psapi.h>
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15 #include <unistd.h>
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16
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17 #include <QDebug>
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18
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19 struct EnumWindowsStruct {
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20 EnumWindowsStruct() : windowId(0) {}
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21 DWORD pid;
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22 HWND windowId;
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23 };
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24
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25 PSID copySid(PSID from)
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26 {
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27 if (!from) {
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28 return 0;
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29 }
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30
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31 int sidLength = GetLengthSid(from);
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32 PSID to = (PSID) xmalloc(sidLength);
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33 CopySid(sidLength, to, from);
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34 return to;
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35 }
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36
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37 static PSID getProcessOwner(HANDLE hProcess)
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38 {
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39 HANDLE hToken = NULL;
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40 PSID sid;
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41
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42 OpenProcessToken(hProcess, TOKEN_READ, &hToken);
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43 if (hToken) {
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44 DWORD size;
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45 PTOKEN_USER userStruct;
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46
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47 // check how much space is needed
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48 GetTokenInformation(hToken, TokenUser, NULL, 0, &size);
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49 if (ERROR_INSUFFICIENT_BUFFER == GetLastError()) {
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50 userStruct = reinterpret_cast<PTOKEN_USER>(new BYTE[size]);
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51 GetTokenInformation(hToken, TokenUser, userStruct, size, &size);
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52
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53 sid = copySid(userStruct->User.Sid);
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54 CloseHandle(hToken);
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55 delete [] userStruct;
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56 return sid;
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57 }
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58 }
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59 return 0;
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60 }
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61
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62 BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
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63 {
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64 if (GetWindowLong(hwnd, GWL_STYLE) & WS_VISIBLE) {
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65
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66 DWORD pidwin;
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67
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68 GetWindowThreadProcessId(hwnd, &pidwin);
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69 if (pidwin == ((EnumWindowsStruct *)lParam)->pid) {
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70 ((EnumWindowsStruct *)lParam)->windowId = hwnd;
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71 return FALSE;
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72 }
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73 }
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74 return TRUE;
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75 }
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76
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77
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78 static HANDLE getProcessHandle(int processID)
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79 {
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80 return OpenProcess(SYNCHRONIZE |
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81 PROCESS_QUERY_INFORMATION |
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82 PROCESS_VM_READ |
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83 PROCESS_TERMINATE,
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84 false, processID);
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85 }
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86
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87 const QList<int> ProcessHelp::getProcessesIdForName(const QString &processName)
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88 {
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89 HANDLE h;
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90 PROCESSENTRY32 pe32;
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91 QList <int> pids;
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92
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93 h = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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94 if (h == INVALID_HANDLE_VALUE) {
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95 return pids;
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96 }
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97
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98 pe32.dwSize = sizeof(PROCESSENTRY32); // Necessary according to MSDN
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99 if (!Process32First(h, &pe32)) {
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100 return pids;
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101 }
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102
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103 pids.clear();
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104
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105 const QString processNameLower = processName.toLower().replace(".exe", "");
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106 const QString processNameExe = processNameLower + ".exe";
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107
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108 do {
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109 const QString exeFile = QString::fromWCharArray(pe32.szExeFile).toLower();
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110 if (exeFile == processNameLower || exeFile == processNameExe) {
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111 PSID user_sid = getProcessOwner(GetCurrentProcess());
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112 if (user_sid) {
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113 // Also check that we are the owner of that process
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114 HANDLE hProcess = getProcessHandle(pe32.th32ProcessID);
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115 if (!hProcess) {
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116 continue;
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117 }
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118
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119 PSID sid = getProcessOwner(hProcess);
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120 PSID userSid = getProcessOwner(GetCurrentProcess());
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121 if (!sid || (userSid && !EqualSid(userSid, sid))) {
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122 free(sid);
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123 continue;
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124 }
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125 }
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126 pids.append((int)pe32.th32ProcessID);
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127 qDebug() << "found PID: " << (int)pe32.th32ProcessID;
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128 }
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129 } while (Process32Next(h, &pe32));
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130 CloseHandle(h);
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131 return pids;
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132 }
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133
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134 bool ProcessHelp::otherProcessesExist(const QString &processName)
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135 {
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136 const QList<int> pids = getProcessesIdForName(processName);
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137 int myPid = getpid();
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138 foreach(int pid, pids) {
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139 if (myPid != pid) {
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140 qDebug() << "Found another process with id: " << pid;
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141 return true;
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142 }
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143 }
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144 return false;
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145 }
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146
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147 void ProcessHelp::activateWindowForProcess(const QString &executableName)
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148 {
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149 const QList<int> pids = getProcessesIdForName(executableName);
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150 int myPid = getpid();
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151 int foundPid = 0;
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152 foreach(int pid, pids) {
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153 if (myPid != pid) {
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154 qDebug() << "activateWindowForProcess(): PID to activate:" << pid;
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155 foundPid = pid;
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156 break;
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157 }
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158 }
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159 if (foundPid == 0) {
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160 return;
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161 }
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162 EnumWindowsStruct winStruct;
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163 winStruct.pid = foundPid;
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164 EnumWindows(EnumWindowsProc, (LPARAM)&winStruct);
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165 if (winStruct.windowId == 0) {
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166 return;
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167 }
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168 SetForegroundWindow(winStruct.windowId);
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169 }
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170 #endif // WIN32
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171
http://wald.intevation.org/projects/trustbridge/