/*
 * @(#)java.c	1.138 06/04/14
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

/*
 * Shared source for 'java' command line tool.
 *
 * If JAVA_ARGS is defined, then acts as a launcher for applications. For
 * instance, the JDK command line tools such as javac and javadoc (see
 * makefiles for more details) are built with this program.  Any arguments
 * prefixed with '-J' will be passed directly to the 'java' command.
 */

/*
 * One job of the launcher is to remove command line options which the
 * vm does not understand and will not process.  These options include
 * options which select which style of vm is run (e.g. -client and
 * -server) as well as options which select the data model to use.
 * Additionally, for tools which invoke an underlying vm "-J-foo"
 * options are turned into "-foo" options to the vm.  This option
 * filtering is handled in a number of places in the launcher, some of
 * it in machine-dependent code.  In this file, the function
 * CheckJVMType removes vm style options and TranslateApplicationArgs
 * removes "-J" prefixes.  On unix platforms, the
 * CreateExecutionEnvironment function from the unix java_md.c file
 * processes and removes -d<n> options.  However, in case
 * CreateExecutionEnvironment does not need to exec because
 * LD_LIBRARY_PATH is set acceptably and the data model does not need
 * to be changed, ParseArguments will screen out the redundant -d<n>
 * options and prevent them from being passed to the vm; this is done
 * by using the machine-dependent call
 * RemovableMachineDependentOption.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <jni.h>
#include <jvm.h>
#include "java.h"
#include "manifest_info.h"
#include "version_comp.h"
#include "wildcard.h"
#include "splashscreen.h"

#ifndef FULL_VERSION
#define FULL_VERSION JDK_MAJOR_VERSION "." JDK_MINOR_VERSION
#endif

/*
 * The following environment variable is used to influence the behavior
 * of the jre exec'd through the SelectVersion routine.  The command line
 * options which specify the version are not passed to the exec'd version,
 * because that jre may be an older version which wouldn't recognize them.
 * This environment variable is known to this (and later) version and serves
 * to suppress the version selection code.  This is not only for efficiency,
 * but also for correctness, since any command line options have been
 * removed which would cause any value found in the manifest to be used.
 * This would be incorrect because the command line options are defined
 * to take precedence.
 *
 * The value associated with this environment variable is the MainClass
 * name from within the executable jar file (if any). This is strictly a
 * performance enhancement to avoid re-reading the jar file manifest.
 *
 * A NOTE TO DEVELOPERS: For performance reasons it is important that
 * the program image remain relatively small until after SelectVersion
 * CreateExecutionEnvironment have finished their possibly recursive
 * processing. Watch everything, but resist all temptations to use Java
 * interfaces.
 */
#define ENV_ENTRY "_JAVA_VERSION_SET"

#define SPLASH_FILE_ENV_ENTRY "_JAVA_SPLASH_FILE"
#define SPLASH_JAR_ENV_ENTRY "_JAVA_SPLASH_JAR"

static jboolean printVersion = JNI_FALSE; /* print and exit */
static jboolean showVersion = JNI_FALSE;  /* print but continue */
static char *progname;
jboolean _launcher_debug = JNI_FALSE;

/*
 * Entries for splash screen environment variables.
 * putenv is performed in SelectVersion. We need
 * them in memory until UnsetEnv, so they are made static 
 * global instead of auto local.
 */
static char* splash_file_entry = NULL;
static char* splash_jar_entry = NULL;

/*
 * List of VM options to be specified when the VM is created.
 */
static JavaVMOption *options;
static int numOptions, maxOptions;