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 "libsearch4j.h"
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8 |
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9 | void usage();
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10 |
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11 | enum Action {
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12 | Find,
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13 | Launch,
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14 | Compare
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15 | };
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16 |
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17 | enum JvmProperty {
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18 | JavaHome,
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19 | Version,
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20 | Executable,
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21 | Type
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22 | };
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23 |
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24 | string actionToString( Action a ) {
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25 | if ( a == Find )
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26 | return "Find";
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27 | else if ( a == Launch )
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28 | return "Launch";
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29 | else if ( a == Compare )
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30 | return "Compare";
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31 | return "Unknown";
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32 | }
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33 |
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34 | string jvmPropertyToString( JvmProperty jp ) {
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35 | if ( jp == JavaHome )
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36 | return "JavaHome";
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37 | else if ( jp == Version )
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38 | return "Version";
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39 | else if ( jp == Executable )
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40 | return "Executable";
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41 | else if ( jp == Type )
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42 | return "Type";
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43 |
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44 | return "Unknown";
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45 | }
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46 |
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47 |
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48 | int main ( int argc, char** argv ) {
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49 |
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50 | bool verbose = false;
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51 | string phint = "";
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52 | string hint = "";
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53 | bool use_minimum = false;
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54 | bool useJavaw = false;
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55 | bool jdkOnly = false;
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56 | bool jreOnly = false;
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57 | Jvm minimum;
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58 | JvmProperty jvmProperty = JavaHome;
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59 | Action action = Find;
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60 | string arg1 = "";
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61 |
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62 | //parse commandline arguments
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63 | for (int i=1; i<argc; i++) {
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64 |
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65 | //be verbose
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66 | if ( strcmp(argv[i], "--verbose") == 0 ) {
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67 | verbose = true;
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68 |
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69 | //show help
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70 | } else if ( strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "--usage") == 0 ) {
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71 | usage();
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72 | return 0;
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73 |
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74 | //show version
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75 | } else if ( strcmp(argv[i], "-v") == 0 ) {
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76 | jvmProperty = Version;
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77 |
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78 | //show path to executable
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79 | } else if ( strcmp(argv[i], "-e") == 0 ) {
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80 | jvmProperty = Executable;
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81 |
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82 | //show whether jre or jdk
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83 | } else if ( strcmp(argv[i], "-t") == 0 ) {
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84 | jvmProperty = Type;
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85 |
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86 | //compare found java with the given version string
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87 | } else if ( strcmp(argv[i], "-c") == 0 ) {
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88 | action = Compare;
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89 | if ( i == argc-1 ) {
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90 | usage();
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91 | return -1;
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92 | } else {
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93 | arg1 = argv[++i];
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94 | }
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95 |
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96 | //find only javas at or above the given version
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97 | } else if ( strcmp(argv[i], "-m") == 0 ) {
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98 | if ( i == argc-1 ) {
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99 | usage();
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100 | return -1;
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101 | } else {
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102 | if ( !minimum.setVersionFromString( argv[++i] ) ) {
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103 | usage();
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104 | return 0;
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105 | }
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106 | use_minimum = true;
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107 | }
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108 |
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109 | //find only jdks
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110 | } else if ( strcmp(argv[i], "-d") == 0 ) {
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111 | jdkOnly = true;
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112 |
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113 | //find only jres
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114 | } else if ( strcmp(argv[i], "-r") == 0 ) {
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115 | jreOnly = true;
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116 |
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117 | //launch the named jar with the found java
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118 | } else if ( strcmp(argv[i], "-l") == 0 ) {
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119 | if ( i == argc-1 ) {
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120 | usage();
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121 | return -1;
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122 | } else {
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123 | action = Launch;
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124 | arg1 = argv[++i];
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125 | }
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126 |
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127 | //take the given priority hint
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128 | } else if ( strcmp(argv[i], "-p") == 0 ) {
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129 | if ( i == argc-1 ) {
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130 | usage();
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131 | return -1;
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132 | } else {
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133 | phint = argv[++i];
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134 | }
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135 |
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136 | // take the following hint
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137 | } else if ( strcmp(argv[i], "-h") == 0 ) {
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138 | if ( i == argc-1 ) {
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139 | usage();
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140 | return -1;
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141 | } else {
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142 | hint = argv[++i];
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143 | }
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144 |
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145 | #ifdef WINDOWS
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146 | //show the path to the javaw executable
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147 | } else if ( strcmp(argv[i], "-w") == 0 ) {
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148 | useJavaw = true;
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149 | #endif
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150 |
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151 | } else {
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152 | cout << "unknown option: " << argv[i] << endl;
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153 | return -1;
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154 | }
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155 | }
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156 |
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157 | //summarise commandline arguments
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158 | if ( verbose ) {
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159 | cout << "Action: " << actionToString( action ) << endl;
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160 | }
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161 |
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162 | //find java
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163 | Jvm foundJvm;
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164 | bool found = find( foundJvm, use_minimum, minimum, jreOnly, jdkOnly, phint, hint, verbose );
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165 |
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166 | //check if it was found
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167 | if ( found ) {
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168 | if ( verbose ) cout << "Found JVM at '" << foundJvm.getJavaHome() << "'" << endl;
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169 | } else {
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170 | //not found - exit with -1
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171 | if ( verbose ) cout << "JVM not found" << endl;
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172 | return -1;
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173 | }
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174 |
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175 |
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176 | //Find Action
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177 | //---------------
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178 | if ( action == Find ) {
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179 |
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180 | if ( verbose ) cout << "Property to print: " << jvmPropertyToString( jvmProperty ) << endl;
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181 |
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182 | //found - print out info about it
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183 | if ( jvmProperty == JavaHome ) {
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184 | cout << foundJvm.getJavaHome() << endl;
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185 | } else if ( jvmProperty == Version ) {
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186 | cout << foundJvm.getVersion() << endl;
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187 | } else if ( jvmProperty == Executable ) {
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188 | #ifdef WINDOWS
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189 | if ( useJavaw ) {
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190 | cout << foundJvm.getWinExecutable() << endl;
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191 | } else {
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192 | cout << foundJvm.getExecutable() << endl;
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193 | }
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194 | #else
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195 | cout << foundJvm.getExecutable() << endl;
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196 | #endif
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197 | } else if ( jvmProperty == Type ) {
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198 | if ( foundJvm.getIsJdk() ) {
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199 | cout << "JDK" << endl;
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200 | } else {
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201 | cout << "JRE" << endl;
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202 | }
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203 | } else {
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204 | return -1; //should never happen
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205 | }
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206 |
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207 |
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208 | //Compare Action
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209 | //---------------
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210 | } else if ( action == Compare ) {
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211 |
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212 | if ( verbose ) cout << "Compare to java at: " << arg1 << endl;
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213 |
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214 | //load a dummy jvm for comparison
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215 | Jvm givenJvm;
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216 | if ( !givenJvm.setVersionFromString(arg1) ) {
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217 | if ( verbose ) cout << "Could not parse that version string" << endl;
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218 | return -1;
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219 | }
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220 |
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221 | //compare
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222 | cout << foundJvm.compare( givenJvm );
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223 | return 0;
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224 |
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225 |
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226 | //Launch Action
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227 | //---------------
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228 | } else if ( action == Launch ) {
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229 |
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230 | if ( verbose ) cout << "Jar to launch: " << arg1 << endl;
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231 |
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232 | string cmd = "\"", output = "";
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233 | #ifdef WINDOWS
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234 | if ( useJavaw ) {
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235 | cmd.append( foundJvm.getWinExecutable() );
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236 | } else {
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237 | cmd.append( foundJvm.getExecutable() );
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238 | }
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239 | #else
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240 | cmd.append( foundJvm.getExecutable() );
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241 | #endif
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242 | cmd.append( "\" -jar " );
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243 | cmd.append( arg1 );
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244 |
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245 | process( cmd, true );
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246 |
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247 | }
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248 |
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249 | return 0;
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250 | }
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251 |
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252 | void usage() {
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253 |
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254 | cout
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255 | << "-----------------" << endl
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256 | << " search4j: usage" << endl
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257 | << "-----------------" << endl
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258 | << "Three usage methods: find, compare and launch" << endl
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259 | << endl
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260 | << "find: find java and print out information about it" << endl
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261 | << endl
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262 | << " search4j [-v|-e|-t]" << endl
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263 | << " eg: search4j -e" << endl
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264 | << endl
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265 | << " by default, print JAVA_HOME. E.g., C:\\Program Files\\jre1.5.0_15, or" << endl
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266 | << " if -v is specified, print the java version string. E.g. 1.5.0_15, or" << endl
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267 | << " 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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268 | << " if -t is specified, print whether the found java is a JRE or a JDK" << endl
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269 | << endl
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270 | << "compare: compare the found java with the given java version string" << endl
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271 | << endl
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272 | << " search4j -c VERSION_STRING" << endl
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273 | << " eg: search4j -c VERSION_STRING" << endl
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274 | << endl
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275 | << " print -1 if found java is older" << endl
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276 | << " print 0 if found java is same" << endl
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277 | << " print 1 if found java is newer" << endl
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278 | << endl
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279 | << "launch: launch the given executable jar with the found java" << endl
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280 | << endl
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281 | << " search4j -l EXECUTABLE_JAR [-m VERSION_STRING]" << endl
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282 | << " eg: search4j -l greenstone3.jar" << endl
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283 | << endl
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284 | << " specify the location of the jar relative to the current directory" << endl
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285 | << endl
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286 | << "Global Options:" << endl
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287 | << " -m VERSION_STRING: (minimum) find a java of the given version or newer, or fail" << endl
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288 | << " -d : find only jdks" << endl
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289 | << " -r : find only jres" << endl
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290 | << " -p LOCATION: (priority hint) first look for java in LOCATION (treated as a JAVA_HOME)" << endl
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291 | << " -h LOCATION: (hint) as a last resort look for java in LOCATION (treated as a JAVA_HOME)" << endl
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292 | #ifdef WINDOWS
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293 | << " -w: (windows) find and/or use the javaw.exe executable instead of java.exe (in windows only)" << endl
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294 | #endif
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295 | << " --verbose : have search4j print out information about what its doing" << endl
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296 | << " --help : display this usage screen" << endl
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297 | << endl
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298 | ;
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299 | }
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