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annotate ui/processhelp_win.cpp @ 633:6c090638b2b4

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Use static buffer for module file name. According to the msdn examle the return value of getmodulefilename should be used to indicate success and not the size. And according to comments on that function on Windows 8.1 it does not return the needed size. So better be more robust and just use max_path as a limit.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 23 Jun 2014 15:29:48 +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/