[15093] | 1 | /*
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| 2 | * Search4j utility
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| 3 | * Command Line utility to search a system for java, launch a jar, or compare java versions
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| 4 | * base on launch4j
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| 5 | */
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| 6 |
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| 7 | #include <iostream>
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| 8 | #include <fstream>
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| 9 | #include <sstream>
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| 10 | #include <string>
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| 11 | #include <windows.h>
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| 12 | using namespace std;
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| 13 |
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| 14 |
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| 15 | //minimal launch4j stuff
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| 16 | #define NO_JAVA_FOUND 0
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| 17 | #define FOUND_JRE 1
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| 18 | #define FOUND_SDK 2
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| 19 | int foundJava = NO_JAVA_FOUND;
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| 20 | char foundJavaVer[128] = {0};
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| 21 |
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| 22 |
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| 23 | //global variables
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| 24 | bool verbose = false;
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| 25 | bool use_minimum = false;
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| 26 |
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| 27 | enum JvmProperty {
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| 28 | JavaHome,
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| 29 | Version,
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| 30 | Executable
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| 31 | };
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| 32 |
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| 33 | enum Action {
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| 34 | Find,
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| 35 | Launch,
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| 36 | Compare
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| 37 | };
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| 38 |
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| 39 | void replace_all ( std::string & str, std::string const & pattern, std::string const & replacement ) {
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| 40 |
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| 41 | std::string::size_type start = str.find( pattern, 0 );
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| 42 |
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| 43 | while ( start != str.npos ) {
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| 44 | str.replace( start, pattern.size(), replacement );
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| 45 | start = str.find( pattern, start+replacement.size() );
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| 46 | }
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| 47 |
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| 48 | }
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| 49 |
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| 50 | int process( string command, string &output ) {
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| 51 |
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| 52 | FILE *pPipe;
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| 53 |
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| 54 | /* Run command so that it writes its output to a pipe. Open this
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| 55 | * pipe with read text attribute so that we can read it
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| 56 | * like a text file. */
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| 57 | char cmd[1024]; strcpy(cmd, command.c_str());
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| 58 | //if ( verbose ) cout << "process(): running '" << command << "'" << endl;
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| 59 | if( (pPipe = _popen( cmd, "rt" )) == NULL ) {
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| 60 | if ( verbose ) cout << "could not start process" << endl;
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| 61 | _pclose( pPipe );
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| 62 | return -1;
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| 63 | }
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| 64 | //if ( verbose ) cout << "started process" << endl;
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| 65 |
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| 66 | /* Read pipe until end of file. */
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| 67 | while( !feof( pPipe ) ) {
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| 68 | char psBuffer[128];
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| 69 | //if ( verbose ) cout << "get some data" << endl;
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| 70 | if( fgets( psBuffer, 128, pPipe ) != NULL ) {
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| 71 |
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| 72 | //if ( verbose ) cout << "got: " << psBuffer << endl;
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| 73 | output.append( psBuffer );
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| 74 |
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| 75 | } else {
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| 76 | //if ( verbose ) cout << "none left" << endl;
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| 77 | }
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| 78 |
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| 79 | }
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| 80 |
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| 81 | /* Close pipe and return return value of pPipe. */
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| 82 | int code = _pclose( pPipe );
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| 83 | return code;
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| 84 | }
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| 85 |
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| 86 | class Jvm {
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| 87 |
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| 88 | string javaHome;
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| 89 |
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| 90 | // version string. era.major.minor_update. eg: 1.4.2_02
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| 91 | int era;
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| 92 | int major;
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| 93 | int minor;
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| 94 | int update;
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| 95 |
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| 96 | bool isJdk;
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| 97 | bool healthy;
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| 98 |
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| 99 |
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| 100 | public:
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| 101 | Jvm() {
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| 102 | healthy = false;
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| 103 | }
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| 104 |
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| 105 | void setJavaHome( string jh ) {
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| 106 | healthy = true;
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| 107 | javaHome = jh;
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| 108 | setVersionFromExeOuput();
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| 109 | }
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| 110 |
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| 111 | string getJavaHome() {
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| 112 | return javaHome;
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| 113 | }
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| 114 |
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| 115 | string getExecutable() {
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| 116 | string exec = "";
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| 117 | exec.append( javaHome );
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| 118 | exec.append( "\\bin\\java.exe" );
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| 119 | return exec;
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| 120 | }
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| 121 |
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| 122 | string getVersion() {
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| 123 | stringstream ss;
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| 124 | ss << era << "." << major << "." << minor << "_" << update;
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| 125 | return ss.str();
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| 126 | }
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| 127 |
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| 128 | bool check() {
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| 129 | return healthy;
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| 130 | }
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| 131 |
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| 132 | bool setVersionFromString( string version ) {
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| 133 | era = atoi( version.substr(0,1).c_str() );
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| 134 | major = atoi( version.substr(2,1).c_str() );
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| 135 | minor = atoi( version.substr(4,1).c_str() );
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| 136 | update = atoi( version.substr(6,2).c_str() );
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| 137 | return true;
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| 138 | }
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| 139 |
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| 140 | int compare( Jvm otherJvm ) {
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| 141 | //era
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| 142 | if ( era > otherJvm.getEra() )
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| 143 | return 1;
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| 144 | else if ( era < otherJvm.getEra() )
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| 145 | return -1;
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| 146 |
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| 147 | //major
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| 148 | if ( major > otherJvm.getMajor() )
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| 149 | return 1;
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| 150 | else if ( major < otherJvm.getMajor() )
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| 151 | return -1;
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| 152 |
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| 153 | //minor
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| 154 | if ( minor > otherJvm.getMinor() )
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| 155 | return 1;
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| 156 | else if ( minor < otherJvm.getMinor() )
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| 157 | return -1;
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| 158 |
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| 159 | //update
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| 160 | if ( update > otherJvm.getUpdate() )
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| 161 | return 1;
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| 162 | else if ( update < otherJvm.getUpdate() )
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| 163 | return -1;
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| 164 |
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| 165 | //all the same so far, must be exactly the same
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| 166 | return 0;
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| 167 |
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| 168 | }
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| 169 |
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| 170 | int getEra() { return era; }
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| 171 | int getMajor() { return major; }
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| 172 | int getMinor() { return minor; }
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| 173 | int getUpdate() { return update; }
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| 174 |
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| 175 | private:
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| 176 |
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| 177 | void setVersionFromExeOuput() {
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| 178 | string command = "", output = "";
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| 179 | command.append( "\"" );
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| 180 | command.append( getExecutable() );
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| 181 | command.append( "\"" );
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| 182 | command.append(" -version 2>&1");
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| 183 | int result = process( command, output );
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| 184 | if ( result == 0 ) {
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| 185 | if ( _stricmp( output.substr( 0, 12 ).c_str() , "java version" ) == 0 || true ) {
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| 186 | era = atoi( output.substr(14,1).c_str() );
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| 187 | major = atoi( output.substr(16,1).c_str() );
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| 188 | minor = atoi( output.substr(18,1).c_str() );
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| 189 | update = atoi( output.substr(20,2).c_str() );
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| 190 | //if ( verbose) cout << "set version to: " << era << "." << major << "." << minor << "_" << update << endl;
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| 191 | } else {
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| 192 | healthy=false;
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| 193 | }
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| 194 | } else {
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| 195 | healthy = false;
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| 196 | }
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| 197 | }
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| 198 |
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| 199 |
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| 200 | };
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| 201 |
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| 202 | string actionToString( Action a ) {
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| 203 | if ( a == Find )
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| 204 | return "Find";
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| 205 | else if ( a == Launch )
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| 206 | return "Launch";
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| 207 | else if ( a == Compare )
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| 208 | return "Compare";
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| 209 | return "Unknown";
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| 210 | }
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| 211 |
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| 212 | string jvmPropertyToString( JvmProperty jp ) {
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| 213 | if ( jp == JavaHome )
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| 214 | return "JavaHome";
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| 215 | else if ( jp == Version )
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| 216 | return "Version";
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| 217 | else if ( jp == Executable )
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| 218 | return "Executable";
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| 219 | return "Unknown";
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| 220 | }
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| 221 |
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| 222 | void usage() {
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| 223 |
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| 224 | cout
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| 225 | << "-----------------" << endl
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| 226 | << " search4j: usage" << endl
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| 227 | << "-----------------" << endl
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| 228 | << "Three usage methods: find, compare and launch" << endl
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| 229 | << endl
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| 230 | << "find: find java and print out information about it" << endl
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| 231 | << endl
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| 232 | << " search4j [-v|-e] [-m VERSION_STRING]" << endl
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| 233 | << " eg: search4j -m 1.4.1_01 -e" << endl
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| 234 | << endl
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| 235 | << " by default, print JAVA_HOME. E.g., C:\\Program Files\\jre1.5.0_15, or" << endl
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| 236 | << " if -v is specified, print the java version string. E.g. 1.5.0_15, or" << endl
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| 237 | << " if -e is specified, print the path the to the java executable. E.g. C:\\Program Files\\jre1.5.0_15\\bin\\java.exe" << endl
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| 238 | << " if -m option is used, find a java of the given version or newer, or fail" << endl
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| 239 | << endl
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| 240 | << "compare: compare the found java with the given java version string" << endl
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| 241 | << endl
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| 242 | << " search4j -c VERSION_STRING" << endl
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| 243 | << " eg: search4j -c VERSION_STRING" << endl
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| 244 | << endl
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| 245 | << " print -1 if found java is older" << endl
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| 246 | << " print 0 if found java is same" << endl
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| 247 | << " print 1 if found java is newer" << endl
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| 248 | << endl
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| 249 | << "launch: launch the given executable jar with the found java" << endl
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| 250 | << endl
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| 251 | << " search4j -l EXECUTABLE_JAR [-m VERSION_STRING]" << endl
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| 252 | << " eg: search4j -l greenstone3.jar" << endl
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| 253 | << endl
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| 254 | << " specify the location of the jar relative to the current directory" << endl
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| 255 | << " if -m option is used, find a java of the given version or newer" << endl
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| 256 | << endl
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| 257 | << "Global Options:" << endl
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| 258 | << " --verbose : have search4j print out information about what its doing" << endl
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| 259 | << " --help : display this usage screen" << endl
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| 260 | << endl
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| 261 | ;
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| 262 | }
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| 263 |
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| 264 | //another global
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| 265 | Jvm minimum;
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| 266 |
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| 267 |
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| 268 | void regSearch(HKEY hKey, const char* keyName, int searchType) {
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| 269 | DWORD x = 0;
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| 270 | unsigned long size = 1024;
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| 271 | FILETIME time;
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| 272 | char buffer[1024] = {0};
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| 273 | while (RegEnumKeyEx(
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| 274 | hKey, // handle to key to enumerate
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| 275 | x++, // index of subkey to enumerate
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| 276 | buffer, // address of buffer for subkey name
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| 277 | &size, // address for size of subkey buffer
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| 278 | NULL, // reserved
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| 279 | NULL, // address of buffer for class string
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| 280 | NULL, // address for size of class buffer
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| 281 | &time) == ERROR_SUCCESS) {
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| 282 | strcpy(foundJavaVer, buffer);
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| 283 | foundJava = searchType;
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| 284 | size = 1024;
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| 285 | }
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| 286 | }
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| 287 |
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| 288 |
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| 289 | /*
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| 290 | * function to find java
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| 291 | * implements the logic drawn on the dl lab whiteboard in feb 08
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| 292 | * return a Jvm object which represents the jvm on disk
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| 293 | */
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| 294 | bool find( Jvm &jvm ) {
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| 295 |
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| 296 | if ( verbose ) cout << "Searching for a JVM" << endl;
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| 297 | char *javaHome = "";
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| 298 | bool jvmFound = false;
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| 299 |
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| 300 | if ( !jvmFound ) {
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| 301 | //try JAVA_HOME
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| 302 | if ( verbose ) cout << " - trying JAVA_HOME: ";
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| 303 | javaHome = getenv( "JAVA_HOME" );
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| 304 | if ( javaHome != NULL ) {
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| 305 | jvm.setJavaHome( javaHome );
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| 306 | if ( jvm.check() ) {
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| 307 | if ( use_minimum ) {
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| 308 | if ( jvm.compare( minimum ) >= 0 ) {
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| 309 | jvmFound = true;
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| 310 | }
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| 311 | } else {
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| 312 | jvmFound = true;
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| 313 | }
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| 314 | }
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| 315 | }
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| 316 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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| 317 | }
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| 318 |
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| 319 | if ( !jvmFound ) {
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| 320 | //try JRE_HOME
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| 321 | if ( verbose ) cout << " - trying JRE_HOME: ";
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| 322 | javaHome = getenv( "JRE_HOME" );
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| 323 | if ( javaHome != NULL ) {
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| 324 | jvm.setJavaHome( javaHome );
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| 325 | if ( jvm.check() ) {
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| 326 | if ( use_minimum ) {
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| 327 | if ( jvm.compare( minimum ) >= 0 ) {
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| 328 | jvmFound = true;
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| 329 | }
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| 330 | } else {
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| 331 | jvmFound = true;
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| 332 | }
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| 333 | }
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| 334 | }
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| 335 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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| 336 | }
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| 337 |
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| 338 | if ( !jvmFound ) {
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| 339 | //try the registry - this code based on launch4j code
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| 340 | if ( verbose ) cout << " - trying the registry: ";
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| 341 | HKEY hKey;
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| 342 | const char jre[] = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
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| 343 | const char sdk[] = "SOFTWARE\\JavaSoft\\Java Development Kit";
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| 344 |
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| 345 | if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(jre), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
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| 346 | regSearch(hKey, jre, FOUND_JRE);
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| 347 | RegCloseKey(hKey);
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| 348 | }
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| 349 |
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| 350 | if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(sdk), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
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| 351 | regSearch(hKey, sdk, FOUND_SDK);
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| 352 | RegCloseKey(hKey);
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| 353 | }
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| 354 |
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| 355 | if ( foundJava != NO_JAVA_FOUND ) {
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| 356 | char path[1024] = {0};
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| 357 | char keyBuffer[1024];
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| 358 | unsigned long datatype;
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| 359 | unsigned long bufferlength = 1024;
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| 360 | if (foundJava == FOUND_JRE) {
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| 361 | strcpy(keyBuffer, jre);
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| 362 | } else {
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| 363 | strcpy(keyBuffer, sdk);
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| 364 | }
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| 365 | strcat(keyBuffer, "\\");
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| 366 | strcat(keyBuffer, foundJavaVer);
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| 367 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(keyBuffer), 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
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| 368 | unsigned char buffer[1024] = {0};
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| 369 | if (RegQueryValueEx(hKey, "JavaHome", NULL, &datatype, buffer, &bufferlength) == ERROR_SUCCESS) {
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| 370 | int i = 0;
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| 371 | do {
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| 372 | path[i] = buffer[i];
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| 373 | } while (path[i++] != 0);
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| 374 | if (foundJava == FOUND_SDK) {
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| 375 | strcat(path, "\\jre");
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| 376 | }
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| 377 | jvm.setJavaHome( path );
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| 378 | if ( jvm.check() ) {
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| 379 | if ( use_minimum ) {
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| 380 | if ( jvm.compare( minimum ) >= 0 ) {
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| 381 | jvmFound = true;
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| 382 | }
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| 383 | } else {
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| 384 | jvmFound = true;
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| 385 | }
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| 386 | }
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| 387 | }
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| 388 | RegCloseKey(hKey);
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| 389 | }
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| 390 | }
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| 391 | if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
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| 392 | }
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| 393 |
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| 394 | return jvmFound;
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| 395 | }
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| 396 |
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| 397 | int main ( int argc, char** argv ) {
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| 398 | //cout << "testing process()" << endl;
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| 399 | //string out = "";
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| 400 | //process( "dir", out );
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| 401 | //cout << out << endl;
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| 402 | //return 0;
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| 403 |
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| 404 |
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| 405 | JvmProperty jvmProperty = JavaHome;
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| 406 | Action action = Find;
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| 407 | string arg1 = "";
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| 408 |
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| 409 | //parse commandline arguments
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| 410 | for (int i=1; i<argc; i++) {
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| 411 | if ( _stricmp(argv[i], "--verbose") == 0 ) {
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| 412 | verbose = true;
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| 413 | } else if ( _stricmp(argv[i], "--help") == 0 || _stricmp(argv[i], "--usage") == 0 ) {
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| 414 | usage();
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| 415 | return 0;
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| 416 | } else if ( _stricmp(argv[i], "-v") == 0 ) {
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| 417 | jvmProperty = Version;
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| 418 | } else if ( _stricmp(argv[i], "-e") == 0 ) {
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| 419 | jvmProperty = Executable;
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| 420 | } else if ( _stricmp(argv[i], "-c") == 0 ) {
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| 421 | action = Compare;
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| 422 | if ( i == argc-1 ) {
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| 423 | usage();
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| 424 | return 0;
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| 425 | } else {
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| 426 | arg1 = argv[++i];
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| 427 | }
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| 428 |
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| 429 | } else if ( _stricmp(argv[i], "-m") == 0 ) {
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| 430 | if ( i == argc-1 ) {
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| 431 | usage();
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| 432 | return 0;
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| 433 | } else {
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| 434 | if ( !minimum.setVersionFromString( argv[++i] ) ) {
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| 435 | usage();
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| 436 | return 0;
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| 437 | }
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| 438 | use_minimum = true;
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| 439 | }
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| 440 |
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| 441 | } else if ( _stricmp(argv[i], "-l") == 0 ) {
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| 442 | action = Launch;
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| 443 | arg1 = argv[++i];
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| 444 |
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| 445 | } else {
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| 446 | cout << "unknown option: " << argv[i] << endl;
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| 447 | return -1;
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| 448 | }
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| 449 | }
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| 450 |
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| 451 | //summarise commandline arguments
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| 452 | if ( verbose ) {
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| 453 | cout << "Action: " << actionToString( action ) << endl;
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| 454 | }
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| 455 |
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| 456 | //find java
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| 457 | Jvm foundJvm;
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| 458 | bool found = find( foundJvm );
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| 459 |
|
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| 460 | //check if it was found
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| 461 | if ( found ) {
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| 462 | if ( verbose ) cout << "Found JVM at '" << foundJvm.getJavaHome() << "'" << endl;
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| 463 | } else {
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| 464 | //not found - exit with -1
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| 465 | if ( verbose ) cout << "JVM not found" << endl;
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| 466 | return -1;
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| 467 | }
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| 468 |
|
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| 469 |
|
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| 470 | //Find Action
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| 471 | //---------------
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| 472 | if ( action == Find ) {
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| 473 |
|
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| 474 | if ( verbose ) cout << "Property to print: " << jvmPropertyToString( jvmProperty ) << endl;
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| 475 |
|
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| 476 | //found - print out info about it
|
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| 477 | if ( jvmProperty == JavaHome ) {
|
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| 478 | cout << foundJvm.getJavaHome() << endl;
|
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| 479 | } else if ( jvmProperty == Version ) {
|
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| 480 | cout << foundJvm.getVersion() << endl;
|
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| 481 | } else if ( jvmProperty == Executable ) {
|
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| 482 | cout << foundJvm.getExecutable() << endl;
|
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| 483 | } else {
|
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| 484 | return -1; //should never happen
|
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| 485 | }
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| 486 |
|
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| 487 |
|
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| 488 | //Compare Action
|
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| 489 | //---------------
|
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| 490 | } else if ( action == Compare ) {
|
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| 491 |
|
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| 492 | if ( verbose ) cout << "Compare to java at: " << arg1 << endl;
|
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| 493 |
|
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| 494 | //load a dummy jvm for comparison
|
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| 495 | Jvm givenJvm;
|
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| 496 | if ( !givenJvm.setVersionFromString(arg1) ) {
|
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| 497 | if ( verbose ) cout << "Could not parse that version string" << endl;
|
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| 498 | return -1;
|
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| 499 | }
|
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| 500 |
|
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| 501 | //compare
|
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| 502 | cout << foundJvm.compare( givenJvm );
|
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| 503 | return 0;
|
---|
| 504 |
|
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| 505 |
|
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| 506 | //Launch Action
|
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| 507 | //---------------
|
---|
| 508 | } else if ( action == Launch ) {
|
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| 509 |
|
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| 510 | if ( verbose ) cout << "Jar to launch: " << arg1 << endl;
|
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| 511 |
|
---|
| 512 | string cmd = "\"", output = "";
|
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| 513 | cmd.append( foundJvm.getExecutable() );
|
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| 514 | cmd.append( "\" -jar " );
|
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| 515 | cmd.append( arg1 );
|
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| 516 |
|
---|
| 517 | process( cmd, output );
|
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| 518 |
|
---|
| 519 | }
|
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| 520 |
|
---|
| 521 | return 0;
|
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| 522 | } |
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