1 | /*
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2 | * Library of functions for the Search4j utility
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3 | */
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4 |
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5 | #include "libsearch4j.h"
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6 |
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7 | #ifdef WINDOWS
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8 | //minimal launch4j stuff
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9 | #define NO_JAVA_FOUND 0
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10 | #define FOUND_JRE 1
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11 | #define FOUND_SDK 2
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12 |
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13 | //windows functions
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14 | #define popen _popen
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15 | #define pclose _pclose
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16 | #define strcmp _stricmp
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17 |
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18 | #endif /* WINDOWS */
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19 |
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20 | void replace_all ( std::string & str, std::string const & pattern, std::string const & replacement ) {
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21 |
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22 | std::string::size_type start = str.find( pattern, 0 );
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23 |
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24 | while ( start != str.npos ) {
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25 | str.replace( start, pattern.size(), replacement );
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26 | start = str.find( pattern, start+replacement.size() );
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27 | }
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28 |
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29 | }
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30 |
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31 |
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32 | int process( string command, bool render ) {
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33 |
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34 | #ifdef WINDOWS
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35 |
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36 | STARTUPINFO si;
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37 | PROCESS_INFORMATION pi;
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38 | memset(&pi, 0, sizeof(pi));
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39 | memset(&si, 0, sizeof(si));
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40 | si.cb = sizeof(si);
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41 |
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42 | DWORD dwExitCode = -1;
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43 | char* cmd = (char*)command.c_str();
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44 |
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45 | bool result;
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46 | if ( render ) {
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47 | result = CreateProcess(NULL, cmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
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48 | } else {
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49 | result = CreateProcess(NULL, cmd, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi);
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50 | }
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51 |
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52 | if ( result ) {
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53 | WaitForSingleObject(pi.hProcess, INFINITE);
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54 | GetExitCodeProcess(pi.hProcess, &dwExitCode);
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55 | CloseHandle(pi.hThread);
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56 | CloseHandle(pi.hProcess);
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57 | }
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58 | return dwExitCode;
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59 |
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60 | #else
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61 |
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62 | return system( command.c_str() );
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63 |
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64 | #endif
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65 | }
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66 |
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67 |
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68 |
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69 | int process_and_catch_output( string command, string& output ) {
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70 |
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71 | FILE *pPipe;
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72 |
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73 | char cmd[1024];
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74 | strcpy(cmd, command.c_str());
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75 | strcat(cmd, " 2>&1" );
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76 |
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77 | //if ( verbose ) cout << "process(): running '" << command << "'" << endl;
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78 | #ifdef WINDOWS
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79 | if( (pPipe = _popen( cmd, "rt" )) == NULL ) {
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80 | _pclose( pPipe );
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81 | #else
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82 | if( (pPipe = popen( cmd, "r" )) == NULL ) {
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83 | pclose( pPipe );
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84 | #endif
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85 | return -1;
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86 | }
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87 | //if ( verbose ) cout << "started process" << endl;
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88 |
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89 | /* Read pipe until end of file. */
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90 | while( !feof( pPipe ) ) {
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91 | char psBuffer[512];
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92 | //if ( verbose ) cout << "get some data" << endl;
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93 | if( fgets( psBuffer, sizeof(psBuffer), pPipe ) != NULL ) {
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94 |
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95 | //if ( verbose ) cout << "got: " << psBuffer << endl;
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96 | output.append( psBuffer );
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97 |
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98 | } else {
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99 | //if ( verbose ) cout << "none left" << endl;
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100 | }
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101 |
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102 | }
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103 |
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104 | /* Close pipe and return return value of pPipe. */
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105 | #ifdef WINDOWS
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106 | int code = _pclose( pPipe );
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107 | #else
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108 | int code = pclose( pPipe );
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109 | #endif
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110 |
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111 | return code;
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112 |
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113 | }
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114 |
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115 | //Jvm class methods
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116 |
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117 | Jvm::Jvm()
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118 | : era_(1), major_(0), minor_(0), update_(0),
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119 | javaHome_(),
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120 | isJdk_(false), healthy_(false)
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121 | {}
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122 |
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123 | Jvm::~Jvm()
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124 | {
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125 | // javaHome automatically destructed
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126 | }
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127 |
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128 |
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129 | void Jvm::setJavaHome( string jh ) {
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130 | healthy_ = true;
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131 | javaHome_ = jh;
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132 | setVersionFromExeOuput();
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133 | setIsJdkFromJavacPresence();
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134 | }
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135 |
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136 | string Jvm::getJavaHome() {
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137 | return javaHome_;
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138 | }
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139 |
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140 | string Jvm::getExecutable() {
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141 | string exec = "";
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142 | exec.append( javaHome_ );
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143 |
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144 | #ifdef WINDOWS
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145 | exec.append( "\\bin\\java.exe" );
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146 | #endif
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147 |
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148 | #ifndef WINDOWS
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149 | exec.append( "/bin/java" );
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150 | #endif
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151 |
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152 | return exec;
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153 | }
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154 |
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155 | #ifdef WINDOWS
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156 | string Jvm::getWinExecutable() {
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157 | string exec = "";
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158 | exec.append( javaHome_ );
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159 | exec.append( "\\bin\\javaw.exe" );
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160 | return exec;
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161 | }
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162 | #endif
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163 |
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164 |
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165 | string Jvm::getVersion() {
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166 | stringstream ss;
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167 | ss << era_ << "." << major_ << "." << minor_ << "_" << update_;
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168 | return ss.str();
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169 | }
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170 |
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171 | bool Jvm::check() {
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172 | return healthy_;
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173 | }
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174 |
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175 | bool Jvm::setVersionFromString( string version ) {
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176 | era_ = atoi( version.substr(0,1).c_str() );
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177 | if (version[3] == '.') {
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178 | // Parsing something like 1.8.0_24
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179 | major_ = atoi( version.substr(2,1).c_str() );
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180 | if(version.length() >= 5) {
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181 | minor_ = atoi( version.substr(4,1).c_str() );
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182 | } else {
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183 | minor_ = 0;
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184 | }
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185 | if(version.length() >= 7) {
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186 | update_ = atoi( version.substr(6,2).c_str() );
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187 | } else {
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188 | update_ = 0;
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189 | }
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190 | }
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191 | else {
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192 | // Parsing something like 1.8.0_242
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193 | major_ = atoi( version.substr(2,2).c_str() );
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194 | if(version.length() >= 6) {
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195 | minor_ = atoi( version.substr(5,1).c_str() );
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196 | } else {
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197 | minor_ = 0;
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198 | }
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199 | if(version.length() >= 8) {
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200 | update_ = atoi( version.substr(7,2).c_str() );
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201 | } else {
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202 | update_ = 0;
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203 | }
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204 |
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205 | }
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206 |
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207 | return true;
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208 | }
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209 |
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210 | int Jvm::compare( Jvm otherJvm ) {
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211 | //era
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212 | if ( era_ > otherJvm.getEra() )
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213 | return 1;
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214 | else if ( era_ < otherJvm.getEra() )
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215 | return -1;
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216 |
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217 | //major
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218 | if ( major_ > otherJvm.getMajor() )
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219 | return 1;
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220 | else if ( major_ < otherJvm.getMajor() )
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221 | return -1;
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222 |
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223 | //minor
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224 | if ( minor_ > otherJvm.getMinor() )
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225 | return 1;
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226 | else if ( minor_ < otherJvm.getMinor() )
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227 | return -1;
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228 |
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229 | //update
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230 | if ( update_ > otherJvm.getUpdate() )
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231 | return 1;
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232 | else if ( update_ < otherJvm.getUpdate() )
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233 | return -1;
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234 |
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235 | //all the same so far, must be exactly the same
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236 | return 0;
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237 |
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238 | }
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239 |
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240 | int Jvm::getEra() { return era_; }
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241 | int Jvm::getMajor() { return major_; }
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242 | int Jvm::getMinor() { return minor_; }
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243 | int Jvm::getUpdate() { return update_; }
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244 |
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245 | bool Jvm::getIsJdk() { return isJdk_; }
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246 | bool Jvm::getIsJre() { return !isJdk_; }
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247 |
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248 | void Jvm::setVersionFromExeOuput() {
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249 | string command = "", output = "";
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250 | command.append( "\"" );
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251 | command.append( getExecutable() );
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252 | command.append( "\"" );
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253 | command.append(" -version");
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254 |
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255 | //cerr << "command: " << command << endl;
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256 | int result = process_and_catch_output( command, output );
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257 | //cerr << "output: " << output << endl;
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258 |
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259 | if ( result == 0 ) {
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260 | // 22 is the length of sentinel string plus typical version value
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261 | int max_search_length = output.length() - 22;
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262 | int caret = 0;
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263 | bool found = false;
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264 | while (caret < max_search_length && !found) {
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265 | const int to_match_len = 8;
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266 | if ( strcmp( output.substr( caret, to_match_len ).c_str() , " version" ) == 0 ) {
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267 | if (output[caret+to_match_len+3] == '.') {
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268 | // Version of the form 1.8.0_24
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269 | era_ = atoi( output.substr(caret + to_match_len + 2,1).c_str() );
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270 | major_ = atoi( output.substr(caret + to_match_len + 4,1).c_str() );
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271 | minor_ = atoi( output.substr(caret + to_match_len + 6,1).c_str() );
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272 | update_ = atoi( output.substr(caret + to_match_len + 8,2).c_str() );
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273 | }
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274 | else {
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275 | // Version of the form 11.0.6
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276 | era_ = 1;
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277 | major_ = atoi( output.substr(caret + to_match_len + 2,2).c_str() );
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278 | minor_ = atoi( output.substr(caret + to_match_len + 5,1).c_str() );
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279 | update_ = atoi( output.substr(caret + to_match_len + 7,2).c_str() );
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280 |
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281 | }
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282 | found = true;
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283 | }
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284 | else {
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285 | caret++;
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286 | }
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287 | }
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288 | if (!found) {
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289 | healthy_ = false;
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290 | }
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291 | }
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292 | else {
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293 | healthy_ = false;
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294 | }
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295 | }
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296 | void Jvm::setIsJdkFromJavacPresence() {
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297 | string javacFile = "";
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298 | javacFile.append( javaHome_ );
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299 |
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300 | #ifdef WINDOWS
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301 | javacFile.append( "\\bin\\javac.exe" );
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302 | #endif
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303 | #ifndef WINDOWS
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304 | javacFile.append( "/bin/javac" );
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305 | #endif
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306 | struct stat stFileInfo;
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307 | isJdk_ = ( stat(javacFile.c_str(),&stFileInfo) == 0 );
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308 | }
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309 |
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310 | //end of Jvm class methods
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311 |
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312 |
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313 | #ifdef WINDOWS
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314 | int regSearch(HKEY hKey, const char* keyName, int searchType, char* foundJavaVer ) {
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315 | DWORD x = 0;
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316 | unsigned long size = 1024;
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317 | FILETIME time;
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318 | char buffer[1024] = {0};
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319 |
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320 | int foundJava = NO_JAVA_FOUND;
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321 |
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322 | while (RegEnumKeyEx(
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323 | hKey, // handle to key to enumerate
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324 | x++, // index of subkey to enumerate
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325 | buffer, // address of buffer for subkey name
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326 | &size, // address for size of subkey buffer
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327 | NULL, // reserved
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328 | NULL, // address of buffer for class string
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329 | NULL, // address for size of class buffer
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330 | &time) == ERROR_SUCCESS) {
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331 | strcpy(foundJavaVer, buffer);
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332 | foundJava = searchType;
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333 | size = 1024;
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334 | }
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335 |
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336 | return foundJava;
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337 |
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338 | }
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339 | #endif
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340 |
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341 |
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342 | char* get_dirname (const char* full_file_path)
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343 | {
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344 | char* parent_dir = NULL;
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345 |
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346 | if (full_file_path != NULL) {
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347 |
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348 | char* full_file_path_dup = strdup(full_file_path);
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349 | #ifdef WINDOWS
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350 | char *p = strrchr(full_file_path_dup, '\\');
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351 | #else
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352 | char *p = strrchr(full_file_path_dup, '/');
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353 | #endif
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354 |
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355 | if (p != NULL) {
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356 | // truncate the string at the point where the dir-separator was found
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357 | p[0] = 0;
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358 | parent_dir = full_file_path_dup;
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359 | }
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360 | else {
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361 | // no dir-separator found
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362 | free(full_file_path_dup);
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363 | full_file_path_dup = NULL;
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364 | }
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365 | }
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366 |
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367 | return parent_dir;
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368 | }
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369 |
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370 | /*
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371 | * function to find java
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372 | * implements the logic drawn on the dl lab whiteboard in feb 08
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373 | * return a Jvm object which represents the jvm on disk
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374 | */
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375 | bool find( Jvm &jvm, bool use_minimum, const Jvm& minimum, bool jreOnly, bool jdkOnly, string phint, string hint, bool verbose ) {
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376 |
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377 | if ( verbose ) cout << "Searching for a JVM" << endl;
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378 |
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379 | char *javaHomeEnv = NULL; // use below would benefit from more careful application of strdup()/free()
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380 | bool jvmFound = false;
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381 |
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382 | if ( !jvmFound ) {
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383 |
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384 | //try the priority hint
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385 | if ( verbose ) cout << " - trying priority hint: ";
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386 | if ( strcmp(phint.c_str(),"") != 0 ) {
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387 | if ( verbose ) cout << "(" << phint << ") ";
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388 | jvm.setJavaHome( phint );
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389 | if ( jvm.check() ) {
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390 | if ( use_minimum ) {
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391 | if ( jvm.compare( minimum ) >= 0 ) {
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392 | jvmFound = true;
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393 | }
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394 | } else {
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395 | jvmFound = true;
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396 | }
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397 | }
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398 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
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399 | jvmFound = false;
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400 | }
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401 |
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402 | }
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403 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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404 | }
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405 |
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406 | if ( !jvmFound ) {
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407 |
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408 | //try JAVA_HOME
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409 | if ( verbose ) cout << " - trying JAVA_HOME: ";
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410 | javaHomeEnv = getenv( "JAVA_HOME" );
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411 | if ( javaHomeEnv != NULL ) {
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412 | if ( verbose ) cout << "(" << javaHomeEnv << ") ";
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413 | jvm.setJavaHome( javaHomeEnv );
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414 | if ( jvm.check() ) {
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415 | if ( use_minimum ) {
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416 | if ( jvm.compare( minimum ) >= 0 ) {
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417 | jvmFound = true;
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418 | }
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419 | } else {
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420 | jvmFound = true;
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421 | }
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422 | }
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423 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
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424 | jvmFound = false;
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425 | }
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426 |
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427 | }
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428 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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429 | }
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430 |
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431 | if ( !jvmFound ) {
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432 |
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433 | //try JRE_HOME
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434 | if ( verbose ) cout << " - trying JRE_HOME: ";
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435 | javaHomeEnv = getenv( "JRE_HOME" );
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436 | if ( javaHomeEnv != NULL ) {
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437 | if ( verbose ) cout << "(" << javaHomeEnv << ") ";
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438 | jvm.setJavaHome( javaHomeEnv );
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439 | if ( jvm.check() ) {
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440 | if ( use_minimum ) {
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441 | if ( jvm.compare( minimum ) >= 0 ) {
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442 | jvmFound = true;
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443 | }
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444 | } else {
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445 | jvmFound = true;
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446 | }
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447 | }
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448 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
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449 | jvmFound = false;
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450 | }
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451 |
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452 | }
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453 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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454 | }
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455 |
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456 | #ifdef WINDOWS
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457 | if ( !jvmFound ) {
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458 |
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459 | //try the registry - this code based on launch4j code
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460 | char foundJavaVer[8192] = {0};
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461 | int foundJava = NO_JAVA_FOUND;
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462 |
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463 | if ( verbose ) cout << " - trying the registry: "; cout.flush();
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464 | HKEY hKey;
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465 | const char jre[] = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
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466 | const char sdk[] = "SOFTWARE\\JavaSoft\\Java Development Kit";
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467 |
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468 | if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(jre), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
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469 | foundJava = regSearch(hKey, jre, FOUND_JRE, foundJavaVer);
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470 | RegCloseKey(hKey);
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471 | }
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472 |
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473 | if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(sdk), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
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474 | foundJava = regSearch(hKey, sdk, FOUND_SDK, foundJavaVer);
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475 | RegCloseKey(hKey);
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476 | }
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477 |
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478 | if ( foundJava != NO_JAVA_FOUND ) {
|
---|
479 | char path[1024] = {0};
|
---|
480 | char keyBuffer[1024];
|
---|
481 | unsigned long datatype;
|
---|
482 | unsigned long bufferlength = 1024;
|
---|
483 | if (foundJava == FOUND_JRE) {
|
---|
484 | strcpy(keyBuffer, jre);
|
---|
485 | } else {
|
---|
486 | strcpy(keyBuffer, sdk);
|
---|
487 | }
|
---|
488 |
|
---|
489 | strcat(keyBuffer, "\\");
|
---|
490 | strcat(keyBuffer, foundJavaVer);
|
---|
491 |
|
---|
492 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(keyBuffer), 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
|
---|
493 | unsigned char buffer[1024] = {0};
|
---|
494 | if (RegQueryValueEx(hKey, "JavaHome", NULL, &datatype, buffer, &bufferlength) == ERROR_SUCCESS) {
|
---|
495 | int i = 0;
|
---|
496 | do {
|
---|
497 | path[i] = buffer[i];
|
---|
498 | } while (path[i++] != 0);
|
---|
499 | if (foundJava == FOUND_SDK) {
|
---|
500 | strcat(path, "\\jre");
|
---|
501 | }
|
---|
502 | if ( verbose ) cerr << "path: " << path << endl ;
|
---|
503 | jvm.setJavaHome( path );
|
---|
504 | if ( jvm.check() ) {
|
---|
505 | if ( use_minimum ) {
|
---|
506 | if ( jvm.compare( minimum ) >= 0 ) {
|
---|
507 | jvmFound = true;
|
---|
508 | }
|
---|
509 | } else {
|
---|
510 | jvmFound = true;
|
---|
511 | }
|
---|
512 | }
|
---|
513 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
|
---|
514 | jvmFound = false;
|
---|
515 | }
|
---|
516 | }
|
---|
517 | RegCloseKey(hKey);
|
---|
518 | }
|
---|
519 | }
|
---|
520 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
|
---|
521 | }
|
---|
522 | #endif
|
---|
523 |
|
---|
524 | if ( !jvmFound ) {
|
---|
525 |
|
---|
526 | //try the hint
|
---|
527 | if ( verbose ) cout << " - trying hint: ";
|
---|
528 | if ( strcmp(hint.c_str(),"") != 0 ) {
|
---|
529 | if ( verbose ) cout << "(" << hint << ") ";
|
---|
530 | jvm.setJavaHome( hint );
|
---|
531 | if ( jvm.check() ) {
|
---|
532 | if ( use_minimum ) {
|
---|
533 | if ( jvm.compare( minimum ) >= 0 ) {
|
---|
534 | jvmFound = true;
|
---|
535 | }
|
---|
536 | } else {
|
---|
537 | jvmFound = true;
|
---|
538 | }
|
---|
539 | }
|
---|
540 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
|
---|
541 | jvmFound = false;
|
---|
542 | }
|
---|
543 |
|
---|
544 | }
|
---|
545 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
|
---|
546 | }
|
---|
547 |
|
---|
548 |
|
---|
549 |
|
---|
550 | if ( !jvmFound ) {
|
---|
551 | //look for it on PATH
|
---|
552 | if ( verbose ) cout << " - Looking on PATH (possibly yielding a pseudo, but passable, JAVA_HOME such as /usr): ";
|
---|
553 |
|
---|
554 | #ifdef WINDOWS
|
---|
555 | // The following is the DOS equivalent to 'which java', however note that
|
---|
556 | // 'where' returns a list of all possible matches (one per line)
|
---|
557 | const char* cmd = "where java 2>nul";
|
---|
558 | #else
|
---|
559 | const char* cmd = "which java 2>/dev/null";
|
---|
560 | #endif
|
---|
561 | char full_path_java[512] = { '\0' }; // empty string
|
---|
562 |
|
---|
563 | // ****
|
---|
564 | // Consider replacing the following code with a call to process_and_catch_output(command, output)
|
---|
565 | // but would need extending to have extra (optional) argument 'only_first_list' which defaults to 'false'
|
---|
566 |
|
---|
567 | FILE* PIN = popen(cmd,"r");
|
---|
568 | if (PIN == NULL) {
|
---|
569 | cerr << "Failed to run the command to locate 'java' on PATH" << endl;
|
---|
570 | cerr << "Command run was: " << cmd << endl;
|
---|
571 | }
|
---|
572 | else {
|
---|
573 | // Only need the first line of output
|
---|
574 |
|
---|
575 | // Returns number of chars returned. OK to ignore here
|
---|
576 | if (fgets(full_path_java, sizeof(full_path_java), PIN) == NULL) {
|
---|
577 | // Not strictly necessary (as already initialized to be the empty string when declared)
|
---|
578 | // but done to void the warning g++ gives about not checking the return value
|
---|
579 | full_path_java[0] = '\0';
|
---|
580 | }
|
---|
581 | }
|
---|
582 |
|
---|
583 | // Not all implmentations of 'which' are coded to return 0 if a program match is found
|
---|
584 | // => safer just to look to see if a non-empty string is returned
|
---|
585 |
|
---|
586 | int ignore_exit_val = pclose(PIN);
|
---|
587 |
|
---|
588 | if ( strcmp(full_path_java,"") != 0) {
|
---|
589 | // go two directories up from where 'java' was found
|
---|
590 |
|
---|
591 | char* parent_dir = get_dirname(full_path_java);
|
---|
592 | char* parent_parent_dir = get_dirname(parent_dir);
|
---|
593 |
|
---|
594 | javaHomeEnv = parent_parent_dir;
|
---|
595 |
|
---|
596 | if (parent_dir != NULL) {
|
---|
597 | free(parent_dir);
|
---|
598 | }
|
---|
599 |
|
---|
600 | // Logic from here same as for other search4j java/javac testing
|
---|
601 | if (javaHomeEnv != NULL) {
|
---|
602 | if ( verbose ) cout << "(" << javaHomeEnv << ") ";
|
---|
603 | jvm.setJavaHome( javaHomeEnv );
|
---|
604 | if ( jvm.check() ) {
|
---|
605 | if ( use_minimum ) {
|
---|
606 | if ( jvm.compare( minimum ) >= 0 ) {
|
---|
607 | jvmFound = true;
|
---|
608 | }
|
---|
609 | } else {
|
---|
610 | jvmFound = true;
|
---|
611 | }
|
---|
612 | }
|
---|
613 | if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
|
---|
614 | jvmFound = false;
|
---|
615 | }
|
---|
616 | }
|
---|
617 | }
|
---|
618 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
|
---|
619 | }
|
---|
620 |
|
---|
621 |
|
---|
622 | return jvmFound;
|
---|
623 | }
|
---|