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annotate ui/processhelp_win.cpp @ 603:cfef809b890d

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Add Process Management functions and ther implementation for windows.
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 17 Jun 2014 17:26:10 +0200
parents
children 91dd38a71783
rev   line source
603
cfef809b890d Add Process Management functions and ther implementation for windows.
Andre Heinecke <andre.heinecke@intevation.de>
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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 {
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21 EnumWindowsStruct() : windowId( 0 ) {}
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22 DWORD pid;
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23 HWND windowId;
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24 };
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25
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26 PSID copySid(PSID from)
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27 {
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28 if ( !from ) {
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29 return 0;
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30 }
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31
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32 int sidLength = GetLengthSid( from );
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33 PSID to = (PSID) xmalloc( sidLength );
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34 CopySid(sidLength, to, from);
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35 return to;
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36 }
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37
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38 static PSID getProcessOwner(HANDLE hProcess)
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39 {
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40 HANDLE hToken = NULL;
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41 PSID sid;
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42
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43 OpenProcessToken(hProcess, TOKEN_READ, &hToken);
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44 if ( hToken ) {
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45 DWORD size;
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46 PTOKEN_USER userStruct;
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47
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48 // check how much space is needed
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49 GetTokenInformation( hToken, TokenUser, NULL, 0, &size );
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50 if ( ERROR_INSUFFICIENT_BUFFER == GetLastError() ) {
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51 userStruct = reinterpret_cast<PTOKEN_USER>( new BYTE[size] );
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52 GetTokenInformation( hToken, TokenUser, userStruct, size, &size );
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53
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54 sid = copySid( userStruct->User.Sid );
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55 CloseHandle( hToken );
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56 delete [] userStruct;
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57 return sid;
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58 }
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59 }
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60 return 0;
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61 }
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62
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63 BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
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64 {
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65 if (GetWindowLong(hwnd, GWL_STYLE) & WS_VISIBLE) {
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66
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67 DWORD pidwin;
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68
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69 GetWindowThreadProcessId(hwnd, &pidwin);
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70 if (pidwin == ((EnumWindowsStruct *)lParam)->pid) {
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71 ((EnumWindowsStruct *)lParam)->windowId = hwnd;
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72 return FALSE;
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73 }
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74 }
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75 return TRUE;
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76 }
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77
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78
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79 static HANDLE getProcessHandle(int processID)
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80 {
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81 return OpenProcess(SYNCHRONIZE |
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82 PROCESS_QUERY_INFORMATION |
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83 PROCESS_VM_READ |
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84 PROCESS_TERMINATE,
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85 false, processID);
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86 }
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87
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88 const QList<int> ProcessHelp::getProcessesIdForName(const QString &processName)
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89 {
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90 HANDLE h;
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91 PROCESSENTRY32 pe32;
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92 QList <int> pids;
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93
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94 h = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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95 if (h == INVALID_HANDLE_VALUE) {
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96 return pids;
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97 }
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98
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99 pe32.dwSize = sizeof(PROCESSENTRY32); // Necessary according to MSDN
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100 if (!Process32First(h, &pe32)) {
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101 return pids;
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102 }
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103
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104 pids.clear();
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105
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106 do {
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107 if ( QString::fromWCharArray(pe32.szExeFile) == processName ) {
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108 PSID user_sid = getProcessOwner(GetCurrentProcess());
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109 if ( user_sid ) {
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110 // Also check that we are the owner of that process
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111 HANDLE hProcess = getProcessHandle(pe32.th32ProcessID);
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112 if ( !hProcess ) {
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113 continue;
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114 }
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115
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116 PSID sid = getProcessOwner(hProcess);
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117 PSID userSid = getProcessOwner(GetCurrentProcess());
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118 if ( !sid || (userSid && !EqualSid(userSid, sid))) {
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119 free (sid);
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120 continue;
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121 }
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122 }
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123 pids.append((int)pe32.th32ProcessID);
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124 qDebug() << "found PID: " << (int)pe32.th32ProcessID;
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125 }
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126 } while (Process32Next(h, &pe32));
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127 CloseHandle( h );
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128 return pids;
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129 }
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130
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131 bool ProcessHelp::otherProcessesExist(const QString &processName)
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132 {
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133 const QList<int> pids = getProcessesIdForName(processName);
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134 int myPid = getpid();
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135 foreach (int pid, pids) {
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136 if (myPid != pid) {
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137 qDebug() << "Found another process with id: " << pid;
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138 return true;
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139 }
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140 }
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141 return false;
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142 }
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143
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144 void ProcessHelp::activateWindowForProcess(const QString &executableName) {
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145 const QList<int> pids = getProcessesIdForName(executableName);
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146 int myPid = getpid();
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147 int foundPid = 0;
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148 foreach (int pid, pids) {
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149 if (myPid != pid) {
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150 qDebug() << "activateWindowForProcess(): PID to activate:" << pid;
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151 foundPid = pid;
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152 break;
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153 }
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154 }
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155 if ( foundPid == 0 ) {
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156 return;
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157 }
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158 EnumWindowsStruct winStruct;
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159 winStruct.pid = foundPid;
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160 EnumWindows( EnumWindowsProc, (LPARAM)&winStruct );
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161 if ( winStruct.windowId == 0 ) {
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162 return;
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163 }
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164 SetForegroundWindow( winStruct.windowId );
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165 }
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166 #endif // WIN32
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167
http://wald.intevation.org/projects/trustbridge/