├── jitpack.yml ├── .gitattributes ├── .gitignore ├── .github └── FUNDING.yml ├── settings.gradle.kts ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── beta9 ├── build.gradle.kts └── src │ └── main │ └── java │ └── org │ └── apache │ └── logging │ └── log4j │ └── core │ └── lookup │ └── Interpolator.java ├── LICENSE ├── src └── main │ └── java │ └── org │ └── apache │ └── logging │ └── log4j │ └── core │ └── lookup │ └── JndiLookup.java ├── agent ├── build.gradle.kts └── src │ └── main │ └── java │ └── org │ └── glavo │ └── log4j │ └── patch │ └── agent │ └── Log4jAgent.java ├── gradlew.bat ├── README.md └── gradlew /jitpack.yml: -------------------------------------------------------------------------------- 1 | jdk: 2 | - openjdk8 -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | *.gradle.kts linguist-detectable=false -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ 2 | .gradle/ 3 | build/ 4 | /local.properties -------------------------------------------------------------------------------- /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | custom: ["https://afdian.net/@Glavo", "https://donate.glavo.org/"] -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | rootProject.name = "log4j-patch" 2 | 3 | include("agent", "beta9") -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Glavo/log4j-patch/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /beta9/build.gradle.kts: -------------------------------------------------------------------------------- 1 | @file:Suppress("GradlePackageUpdate") 2 | 3 | plugins { 4 | java 5 | } 6 | 7 | tasks.jar { 8 | archiveBaseName.set("log4j-patch-beta9") 9 | } 10 | 11 | 12 | repositories { 13 | mavenCentral() 14 | } 15 | 16 | dependencies { 17 | // https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core 18 | implementation("org.apache.logging.log4j:log4j-core:2.0-beta9") 19 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 2 | Version 2, December 2004 3 | 4 | Copyright (C) 2004 Sam Hocevar 5 | 6 | Everyone is permitted to copy and distribute verbatim or modified 7 | copies of this license document, and changing it is allowed as long 8 | as the name is changed. 9 | 10 | DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 11 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 12 | 13 | 0. You just DO WHAT THE FUCK YOU WANT TO. -------------------------------------------------------------------------------- /src/main/java/org/apache/logging/log4j/core/lookup/JndiLookup.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright © 2021 Glavo 3 | * This work is free. You can redistribute it and/or modify it under the 4 | * terms of the Do What The Fuck You Want To Public License, Version 2, 5 | * as published by Sam Hocevar. See http://www.wtfpl.net/ for more details. 6 | */ 7 | package org.apache.logging.log4j.core.lookup; 8 | 9 | public class JndiLookup { 10 | public JndiLookup() { 11 | throw new NoClassDefFoundError("JNDI lookup is disabled"); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /agent/build.gradle.kts: -------------------------------------------------------------------------------- 1 | plugins { 2 | java 3 | } 4 | 5 | tasks.jar { 6 | archiveBaseName.set("log4j-patch-agent") 7 | manifest.attributes( 8 | "Premain-Class" to "org.glavo.log4j.patch.agent.Log4jAgent" 9 | ) 10 | } 11 | 12 | tasks.processResources { 13 | dependsOn(rootProject.tasks.compileJava) 14 | 15 | into("org/glavo/log4j/patch/agent") { 16 | from(rootProject.file("build/classes/java/main/org/apache/logging/log4j/core/lookup/JndiLookup.class")) 17 | rename("JndiLookup.class", "JndiLookup.class.bin") 18 | } 19 | } 20 | 21 | dependencies { 22 | compileOnly(rootProject) 23 | } -------------------------------------------------------------------------------- /agent/src/main/java/org/glavo/log4j/patch/agent/Log4jAgent.java: -------------------------------------------------------------------------------- 1 | package org.glavo.log4j.patch.agent; 2 | 3 | import java.io.InputStream; 4 | import java.lang.instrument.ClassFileTransformer; 5 | import java.lang.instrument.IllegalClassFormatException; 6 | import java.lang.instrument.Instrumentation; 7 | import java.security.ProtectionDomain; 8 | 9 | public final class Log4jAgent { 10 | static final String TARGET_CLASS_NAME = "org/apache/logging/log4j/core/lookup/JndiLookup"; 11 | static final byte[] NEW_JNDILOOKUP = loadNewJndiLookup(); 12 | 13 | private static byte[] loadNewJndiLookup() { 14 | try { 15 | InputStream input = null; 16 | try { 17 | input = Log4jAgent.class.getResourceAsStream("JndiLookup.class.bin"); 18 | if (input == null) { 19 | throw new AssertionError("JndiLookup.class.bin not found"); 20 | } 21 | int available = input.available(); 22 | if (available <= 0) { 23 | throw new AssertionError(); 24 | } 25 | byte[] res = new byte[available]; 26 | if (input.read(res) != available) { 27 | throw new AssertionError(); 28 | } 29 | 30 | return res; 31 | } finally { 32 | if (input != null) { 33 | input.close(); 34 | } 35 | } 36 | } catch (Exception ex) { 37 | throw new Error(ex); 38 | } 39 | } 40 | 41 | public static void premain(String agentArgs, Instrumentation inst) throws Exception { 42 | System.setProperty("org.glavo.log4j.patch.agent.patched", "false"); 43 | inst.addTransformer(new Transformer()); 44 | } 45 | 46 | private static final class Transformer implements ClassFileTransformer { 47 | 48 | @Override 49 | public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { 50 | if (TARGET_CLASS_NAME.equals(className)) { 51 | System.setProperty("org.glavo.log4j.patch.agent.patched", "true"); 52 | return NEW_JNDILOOKUP; 53 | } 54 | return null; 55 | } 56 | } 57 | 58 | } 59 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Log4j Patch 2 | [![Release](https://jitpack.io/v/org.glavo/log4j-patch.svg)](https://jitpack.io/#org.glavo/log4j-patch) 3 | [![](http://www.wtfpl.net/wp-content/uploads/2012/12/wtfpl-badge-4.png)](http://www.wtfpl.net/) 4 | 5 | Resolve the RCE vulnerability caused by JNDI lookup in log4j 2.0~2.14.1. It is licensed under the [WTFPL 2.0](http://www.wtfpl.net/faq/) license, 6 | you can do anything with it! 7 | 8 | This is a **non-intrusive** patch that allows you to block this vulnerability without modifying the program code/updating the dependent. 9 | So you can use it to patch third-party programs, such as Minecraft. 10 | 11 | The principle of the library is simple: 12 | It provides an empty `JndiLookup` to override the implementation in log4j. 13 | Log4j2 can handle this situation and safely disable JNDI lookup. 14 | 15 | It is compatible with all versions of log4j2 (2.0~2.15). 16 | 17 | ## Usage 18 | 19 | You can add it to the classpath by yourself, or you can use javaagent to inject it automatically. 20 | 21 | ### Use Java Agent 22 | 23 | First, download the agent jar: [log4j-patch-agent-1.0.jar](https://github.com/Glavo/log4j-patch/releases/download/1.0/log4j-patch-agent-1.0.jar). 24 | 25 | You only need to add the `-javaagent:log4j-patch-agent-1.0.jar` to the JVM parameter, and the agent will do everything automatically. 26 | 27 | ### Manual injection 28 | 29 | Sometimes you may not want to use Java agent, such as when you need to generate native-image. You can download it directly from GitHub release: 30 | [log4j-patch-1.0.jar](https://github.com/Glavo/log4j-patch/releases/download/1.0/log4j-patch-1.0.jar). 31 | 32 | All you need to do is add it to the front of the classpath. 33 | 34 | **If you are using java 8, it is best to put it into `$JAVA_HOME/lib/ext`, which will protect programs started with that Java.** 35 | 36 | If you are using log4j2 as a Java module, use this JVM parameter instead of adding it to the classpath: 37 | `--patch-module org.apache.logging.log4j.core=log4j-patch-1.0.jar`. 38 | 39 | ## Adding patch to your build 40 | 41 | If you are using Maven/Gradle/SBT, adding it as the first dependency should solve the problem. 42 | 43 | It is published on Maven Central. You can add dependencies on it in this way: 44 | 45 | Maven: 46 | ```xml 47 | 48 | org.glavo 49 | log4j-patch 50 | 1.0 51 | 52 | ``` 53 | 54 | Gradle: 55 | ```groovy 56 | dependencies { 57 | implementation 'org.glavo:log4j-patch:1.0' 58 | } 59 | ``` 60 | 61 | Gradle Kotlin DSL: 62 | ```kotlin 63 | dependencies { 64 | implementation("org.glavo:log4j-patch:1.0") 65 | } 66 | ``` 67 | 68 | ## Check whether the replacement is successful 69 | 70 | When JNDI lookup is disabled, log4j may print similar content in the log: 71 | ``` 72 | 2021-12-10 15:50:39,521 main WARN JNDI lookup class is not available because this JRE does not support JNDI. JNDI string lookups will not be available, continuing configuration. Ignoring java.lang.ClassCastException: class org.apache.logging.log4j.core.lookup.JndiLookup 73 | ``` 74 | 75 | in addition, if you use the agent, it will set the system property `org.glavo.log4j.patch.agent.patched` to `true` when the replacement is successful. 76 | We can use the `jinfo` command line tool to observe the system properties of the JVM process. 77 | -------------------------------------------------------------------------------- /beta9/src/main/java/org/apache/logging/log4j/core/lookup/Interpolator.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Licensed to the Apache Software Foundation (ASF) under one or more 3 | * contributor license agreements. See the NOTICE file distributed with 4 | * this work for additional information regarding copyright ownership. 5 | * The ASF licenses this file to You under the Apache license, Version 2.0 6 | * (the "License"); you may not use this file except in compliance with 7 | * the License. You may obtain a copy of the License at 8 | * 9 | * http://www.apache.org/licenses/LICENSE-2.0 10 | * 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the license for the specific language governing permissions and 15 | * limitations under the license. 16 | */ 17 | package org.apache.logging.log4j.core.lookup; 18 | 19 | import java.util.HashMap; 20 | import java.util.Map; 21 | 22 | import org.apache.logging.log4j.Logger; 23 | import org.apache.logging.log4j.core.LogEvent; 24 | import org.apache.logging.log4j.core.config.plugins.PluginManager; 25 | import org.apache.logging.log4j.core.config.plugins.PluginType; 26 | import org.apache.logging.log4j.status.StatusLogger; 27 | 28 | /** 29 | * The Interpolator is a StrLookup that acts as a proxy for all the other StrLookups. 30 | */ 31 | public class Interpolator implements StrLookup { 32 | 33 | private static final Logger LOGGER = StatusLogger.getLogger(); 34 | 35 | /** Constant for the prefix separator. */ 36 | private static final char PREFIX_SEPARATOR = ':'; 37 | 38 | private final Map lookups = new HashMap(); 39 | 40 | private final StrLookup defaultLookup; 41 | 42 | public Interpolator(final StrLookup defaultLookup) { 43 | this.defaultLookup = defaultLookup == null ? new MapLookup(new HashMap()) : defaultLookup; 44 | final PluginManager manager = new PluginManager("Lookup"); 45 | manager.collectPlugins(); 46 | final Map> plugins = manager.getPlugins(); 47 | 48 | for (final Map.Entry> entry : plugins.entrySet()) { 49 | @SuppressWarnings("unchecked") 50 | final Class clazz = (Class) entry.getValue().getPluginClass(); 51 | try { 52 | lookups.put(entry.getKey(), clazz.newInstance()); 53 | } catch (final Exception ex) { 54 | LOGGER.error("Unable to create Lookup for " + entry.getKey(), ex); 55 | } 56 | } 57 | } 58 | 59 | /** 60 | * Create the default Interpolator using only Lookups that work without an event. 61 | */ 62 | public Interpolator() { 63 | this.defaultLookup = new MapLookup(new HashMap()); 64 | lookups.put("sys", new SystemPropertiesLookup()); 65 | lookups.put("env", new EnvironmentLookup()); 66 | // lookups.put("jndi", new JndiLookup()); 67 | LOGGER.warn("log4j-patch works, JNDI lookup is disabled."); 68 | try { 69 | if (Class.forName("javax.servlet.ServletContext") != null) { 70 | lookups.put("web", new WebLookup()); 71 | } 72 | } catch (ClassNotFoundException ex) { 73 | LOGGER.debug("ServletContext not present - WebLookup not added"); 74 | } catch (Exception ex) { 75 | LOGGER.error("Unable to locate ServletContext", ex); 76 | } 77 | } 78 | 79 | /** 80 | * Resolves the specified variable. This implementation will try to extract 81 | * a variable prefix from the given variable name (the first colon (':') is 82 | * used as prefix separator). It then passes the name of the variable with 83 | * the prefix stripped to the lookup object registered for this prefix. If 84 | * no prefix can be found or if the associated lookup object cannot resolve 85 | * this variable, the default lookup object will be used. 86 | * 87 | * @param var the name of the variable whose value is to be looked up 88 | * @return the value of this variable or null if it cannot be 89 | * resolved 90 | */ 91 | @Override 92 | public String lookup(final String var) { 93 | return lookup(null, var); 94 | } 95 | 96 | /** 97 | * Resolves the specified variable. This implementation will try to extract 98 | * a variable prefix from the given variable name (the first colon (':') is 99 | * used as prefix separator). It then passes the name of the variable with 100 | * the prefix stripped to the lookup object registered for this prefix. If 101 | * no prefix can be found or if the associated lookup object cannot resolve 102 | * this variable, the default lookup object will be used. 103 | * 104 | * @param event The current LogEvent or null. 105 | * @param var the name of the variable whose value is to be looked up 106 | * @return the value of this variable or null if it cannot be 107 | * resolved 108 | */ 109 | @Override 110 | public String lookup(final LogEvent event, String var) { 111 | if (var == null) { 112 | return null; 113 | } 114 | 115 | final int prefixPos = var.indexOf(PREFIX_SEPARATOR); 116 | if (prefixPos >= 0) { 117 | final String prefix = var.substring(0, prefixPos); 118 | final String name = var.substring(prefixPos + 1); 119 | final StrLookup lookup = lookups.get(prefix); 120 | String value = null; 121 | if (lookup != null) { 122 | value = event == null ? lookup.lookup(name) : lookup.lookup(event, name); 123 | } 124 | 125 | if (value != null) { 126 | return value; 127 | } 128 | var = var.substring(prefixPos + 1); 129 | } 130 | if (defaultLookup != null) { 131 | return event == null ? defaultLookup.lookup(var) : defaultLookup.lookup(event, var); 132 | } 133 | return null; 134 | } 135 | 136 | @Override 137 | public String toString() { 138 | final StringBuilder sb = new StringBuilder(); 139 | for (final String name : lookups.keySet()) { 140 | if (sb.length() == 0) { 141 | sb.append("{"); 142 | } else { 143 | sb.append(", "); 144 | } 145 | 146 | sb.append(name); 147 | } 148 | if (sb.length() > 0) { 149 | sb.append("}"); 150 | } 151 | return sb.toString(); 152 | } 153 | } 154 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | # 4 | # Copyright ? 2015-2021 the original authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | # 21 | # Gradle start up script for POSIX generated by Gradle. 22 | # 23 | # Important for running: 24 | # 25 | # (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is 26 | # noncompliant, but you have some other compliant shell such as ksh or 27 | # bash, then to run this script, type that shell name before the whole 28 | # command line, like: 29 | # 30 | # ksh Gradle 31 | # 32 | # Busybox and similar reduced shells will NOT work, because this script 33 | # requires all of these POSIX shell features: 34 | # * functions; 35 | # * expansions ?$var?, ?${var}?, ?${var:-default}?, ?${var+SET}?, 36 | # ?${var#prefix}?, ?${var%suffix}?, and ?$( cmd )?; 37 | # * compound commands having a testable exit status, especially ?case?; 38 | # * various built-in commands including ?command?, ?set?, and ?ulimit?. 39 | # 40 | # Important for patching: 41 | # 42 | # (2) This script targets any POSIX shell, so it avoids extensions provided 43 | # by Bash, Ksh, etc; in particular arrays are avoided. 44 | # 45 | # The "traditional" practice of packing multiple parameters into a 46 | # space-separated string is a well documented source of bugs and security 47 | # problems, so this is (mostly) avoided, by progressively accumulating 48 | # options in "$@", and eventually passing that to Java. 49 | # 50 | # Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, 51 | # and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; 52 | # see the in-line comments for details. 53 | # 54 | # There are tweaks for specific operating systems such as AIX, CygWin, 55 | # Darwin, MinGW, and NonStop. 56 | # 57 | # (3) This script is generated from the Groovy template 58 | # https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt 59 | # within the Gradle project. 60 | # 61 | # You can find Gradle at https://github.com/gradle/gradle/. 62 | # 63 | ############################################################################## 64 | 65 | # Attempt to set APP_HOME 66 | 67 | # Resolve links: $0 may be a link 68 | app_path=$0 69 | 70 | # Need this for daisy-chained symlinks. 71 | while 72 | APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path 73 | [ -h "$app_path" ] 74 | do 75 | ls=$( ls -ld "$app_path" ) 76 | link=${ls#*' -> '} 77 | case $link in #( 78 | /*) app_path=$link ;; #( 79 | *) app_path=$APP_HOME$link ;; 80 | esac 81 | done 82 | 83 | APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit 84 | 85 | APP_NAME="Gradle" 86 | APP_BASE_NAME=${0##*/} 87 | 88 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 89 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 90 | 91 | # Use the maximum available, or set MAX_FD != -1 to use that value. 92 | MAX_FD=maximum 93 | 94 | warn () { 95 | echo "$*" 96 | } >&2 97 | 98 | die () { 99 | echo 100 | echo "$*" 101 | echo 102 | exit 1 103 | } >&2 104 | 105 | # OS specific support (must be 'true' or 'false'). 106 | cygwin=false 107 | msys=false 108 | darwin=false 109 | nonstop=false 110 | case "$( uname )" in #( 111 | CYGWIN* ) cygwin=true ;; #( 112 | Darwin* ) darwin=true ;; #( 113 | MSYS* | MINGW* ) msys=true ;; #( 114 | NONSTOP* ) nonstop=true ;; 115 | esac 116 | 117 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 118 | 119 | 120 | # Determine the Java command to use to start the JVM. 121 | if [ -n "$JAVA_HOME" ] ; then 122 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 123 | # IBM's JDK on AIX uses strange locations for the executables 124 | JAVACMD=$JAVA_HOME/jre/sh/java 125 | else 126 | JAVACMD=$JAVA_HOME/bin/java 127 | fi 128 | if [ ! -x "$JAVACMD" ] ; then 129 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 130 | 131 | Please set the JAVA_HOME variable in your environment to match the 132 | location of your Java installation." 133 | fi 134 | else 135 | JAVACMD=java 136 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 137 | 138 | Please set the JAVA_HOME variable in your environment to match the 139 | location of your Java installation." 140 | fi 141 | 142 | # Increase the maximum file descriptors if we can. 143 | if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then 144 | case $MAX_FD in #( 145 | max*) 146 | MAX_FD=$( ulimit -H -n ) || 147 | warn "Could not query maximum file descriptor limit" 148 | esac 149 | case $MAX_FD in #( 150 | '' | soft) :;; #( 151 | *) 152 | ulimit -n "$MAX_FD" || 153 | warn "Could not set maximum file descriptor limit to $MAX_FD" 154 | esac 155 | fi 156 | 157 | # Collect all arguments for the java command, stacking in reverse order: 158 | # * args from the command line 159 | # * the main class name 160 | # * -classpath 161 | # * -D...appname settings 162 | # * --module-path (only if needed) 163 | # * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. 164 | 165 | # For Cygwin or MSYS, switch paths to Windows format before running java 166 | if "$cygwin" || "$msys" ; then 167 | APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) 168 | CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) 169 | 170 | JAVACMD=$( cygpath --unix "$JAVACMD" ) 171 | 172 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 173 | for arg do 174 | if 175 | case $arg in #( 176 | -*) false ;; # don't mess with options #( 177 | /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath 178 | [ -e "$t" ] ;; #( 179 | *) false ;; 180 | esac 181 | then 182 | arg=$( cygpath --path --ignore --mixed "$arg" ) 183 | fi 184 | # Roll the args list around exactly as many times as the number of 185 | # args, so each arg winds up back in the position where it started, but 186 | # possibly modified. 187 | # 188 | # NB: a `for` loop captures its iteration list before it begins, so 189 | # changing the positional parameters here affects neither the number of 190 | # iterations, nor the values presented in `arg`. 191 | shift # remove old arg 192 | set -- "$@" "$arg" # push replacement arg 193 | done 194 | fi 195 | 196 | # Collect all arguments for the java command; 197 | # * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of 198 | # shell script including quotes and variable substitutions, so put them in 199 | # double quotes to make sure that they get re-expanded; and 200 | # * put everything else in single quotes, so that it's not re-expanded. 201 | 202 | set -- \ 203 | "-Dorg.gradle.appname=$APP_BASE_NAME" \ 204 | -classpath "$CLASSPATH" \ 205 | org.gradle.wrapper.GradleWrapperMain \ 206 | "$@" 207 | 208 | # Use "xargs" to parse quoted args. 209 | # 210 | # With -n1 it outputs one arg per line, with the quotes and backslashes removed. 211 | # 212 | # In Bash we could simply go: 213 | # 214 | # readarray ARGS < <( xargs -n1 <<<"$var" ) && 215 | # set -- "${ARGS[@]}" "$@" 216 | # 217 | # but POSIX shell has neither arrays nor command substitution, so instead we 218 | # post-process each arg (as a line of input to sed) to backslash-escape any 219 | # character that might be a shell metacharacter, then use eval to reverse 220 | # that process (while maintaining the separation between arguments), and wrap 221 | # the whole thing up as a single "set" statement. 222 | # 223 | # This will of course break if any of these variables contains a newline or 224 | # an unmatched quote. 225 | # 226 | 227 | eval "set -- $( 228 | printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | 229 | xargs -n1 | 230 | sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | 231 | tr '\n' ' ' 232 | )" '"$@"' 233 | 234 | exec "$JAVACMD" "$@" 235 | --------------------------------------------------------------------------------