/*
* Entry point.
*/
int
main(int argc, char ** argv)
{
JavaVM *vm = 0;
JNIEnv *env = 0;
char *jarfile = 0;
char *classname = 0;
char *s = 0;
char *main_class = NULL;
jstring mainClassName;
jclass mainClass;
jmethodID mainID;
jobjectArray mainArgs;
int ret;
InvocationFunctions ifn;
jlong start, end;
char jrepath[MAXPATHLEN], jvmpath[MAXPATHLEN];
char ** original_argv = argv;
/*
* Error message to print or display; by default the message will
* only be displayed in a window.
*/
char * message = "Fatal exception occurred. Program will exit.";
jboolean messageDest = JNI_FALSE;
if (getenv("_JAVA_LAUNCHER_DEBUG") != 0) {
_launcher_debug = JNI_TRUE;
printf("----_JAVA_LAUNCHER_DEBUG----\n");
}
/*
* Make sure the specified version of the JRE is running.
*
* There are three things to note about the SelectVersion() routine:
* 1) If the version running isn't correct, this routine doesn't
* return (either the correct version has been exec'd or an error
* was issued).
* 2) Argc and Argv in this scope are *not* altered by this routine.
* It is the responsibility of subsequent code to ignore the
* arguments handled by this routine.
* 3) As a side-effect, the variable "main_class" is guaranteed to
* be set (if it should ever be set). This isn't exactly the
* poster child for structured programming, but it is a small
* price to pay for not processing a jar file operand twice.
*/
SelectVersion(argc, argv, &main_class);
/* copy original argv */
{
int i;
original_argv = (char**)MemAlloc(sizeof(char*)*(argc+1));
for(i = 0; i < argc+1; i++)
original_argv[i] = argv[i];
}
CreateExecutionEnvironment(&argc, &argv,
jrepath, sizeof(jrepath),
jvmpath, sizeof(jvmpath),
original_argv);
ifn.CreateJavaVM = 0;
ifn.GetDefaultJavaVMInitArgs = 0;
if (_launcher_debug)
start = CounterGet();
if (!LoadJavaVM(jvmpath, &ifn)) {
exit(6);
}
if (_launcher_debug) {
end = CounterGet();
printf("%ld micro seconds to LoadJavaVM\n",
(long)(jint)Counter2Micros(end-start));
}
#ifdef JAVA_ARGS /* javac, jar and friends. */
progname = "java";
#else /* java, oldjava, javaw and friends */
#ifdef PROGNAME
progname = PROGNAME;
#else
progname = *argv;
if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
progname = s + 1;
}
#endif /* PROGNAME */
#endif /* JAVA_ARGS */
++argv;
--argc;
#ifdef JAVA_ARGS
/* Preprocess wrapper arguments */
TranslateDashJArgs(&argc, &argv);
if (!AddApplicationOptions()) {
exit(1);
}
#endif
/* Set default CLASSPATH */
if ((s = getenv("CLASSPATH")) == 0) {
s = ".";
}
#ifndef JAVA_ARGS
SetClassPath(s);
#endif
/*
* Parse command line options; if the return value of
* ParseArguments is false, the program should exit.
*/
if (!ParseArguments(&argc, &argv, &jarfile, &classname, &ret)) {
exit(ret);
}
/* Override class path if -jar flag was specified */
if (jarfile != 0) {
SetClassPath(jarfile);
}
/* set the -Dsun.java.command pseudo property */
SetJavaCommandLineProp(classname, jarfile, argc, argv);
/* Set the -Dsun.java.launcher pseudo property */
SetJavaLauncherProp();
/*
* Done with all command line processing and potential re-execs so
* clean up the environment.
*/
(void)UnsetEnv(ENV_ENTRY);
/* Initialize the virtual machine */
if (_launcher_debug)
start = CounterGet();
if (!InitializeJVM(&vm, &env, &ifn)) {
ReportErrorMessage("Could not create the Java virtual machine.",
JNI_TRUE);
exit(1);
}
if (printVersion || showVersion) {
PrintJavaVersion(env);
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
if (printVersion) {
ret = 0;
message = NULL;
goto leave;
}
if (showVersion) {
fprintf(stderr, "\n");
}
}
/* If the user specified neither a class name nor a JAR file */
if (jarfile == 0 && classname == 0) {
PrintUsage();
message = NULL;
goto leave;
}
FreeKnownVMs(); /* after last possible PrintUsage() */
if (_launcher_debug) {
end = CounterGet();
printf("%ld micro seconds to InitializeJVM\n",
(long)(jint)Counter2Micros(end-start));
}
/* At this stage, argc/argv have the applications' arguments */
if (_launcher_debug) {
int i = 0;
printf("Main-Class is '%s'\n", classname ? classname : "");
printf("Apps' argc is %d\n", argc);
for (; i < argc; i++) {
printf(" argv[%2d] = '%s'\n", i, argv[i]);
}
}
ret = 1;
/* Get the application's main class */
if (jarfile != 0) {
mainClassName = GetMainClassName(env, jarfile);
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
if (mainClassName == NULL) {
const char * format = "Failed to load Main-Class manifest "
"attribute from\n%s";
message = (char*)MemAlloc((strlen(format) + strlen(jarfile)) *
sizeof(char));
sprintf(message, format, jarfile);
messageDest = JNI_TRUE;
goto leave;
}
classname = (char *)(*env)->GetStringUTFChars(env, mainClassName, 0);
if (classname == NULL) {
ReportExceptionDescription(env);
goto leave;
}
mainClass = LoadClass(env, classname);
if(mainClass == NULL) { /* exception occured */
ReportExceptionDescription(env);
message = "Could not find the main class. Program will exit.";
goto leave;
}
(*env)->ReleaseStringUTFChars(env, mainClassName, classname);
} else {
mainClassName = NewPlatformString(env, classname);
if (mainClassName == NULL) {
const char * format = "Failed to load Main Class: %s";
message = (char *)MemAlloc((strlen(format) + strlen(classname)) *
sizeof(char) );
sprintf(message, format, classname);
messageDest = JNI_TRUE;
goto leave;
}
classname = (char *)(*env)->GetStringUTFChars(env, mainClassName, 0);
if (classname == NULL) {
ReportExceptionDescription(env);
goto leave;
}
mainClass = LoadClass(env, classname);
if(mainClass == NULL) { /* exception occured */
ReportExceptionDescription(env);
message = "Could not find the main class. Program will exit.";
goto leave;
}
(*env)->ReleaseStringUTFChars(env, mainClassName, classname);
}
/* Get the application's main method */
mainID = (*env)->GetStaticMethodID(env, mainClass, "main",
"([Ljava/lang/String;)V");
if (mainID == NULL) {
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
} else {
message = "No main method found in specified class.";
messageDest = JNI_TRUE;
}
goto leave;
}
{ /* Make sure the main method is public */
jint mods;
jmethodID mid;
jobject obj = (*env)->ToReflectedMethod(env, mainClass,
mainID, JNI_TRUE);
if( obj == NULL) { /* exception occurred */
ReportExceptionDescription(env);
goto leave;
}
mid =
(*env)->GetMethodID(env,
(*env)->GetObjectClass(env, obj),
"getModifiers", "()I");
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
mods = (*env)->CallIntMethod(env, obj, mid);
if ((mods & 1) == 0) { /* if (!Modifier.isPublic(mods)) ... */
message = "Main method not public.";
messageDest = JNI_TRUE;
goto leave;
}
}
/* Build argument array */
mainArgs = NewPlatformStringArray(env, argv, argc);
if (mainArgs == NULL) {
ReportExceptionDescription(env);
goto leave;
}
/* Invoke main method. */
(*env)->CallStaticVoidMethod(env, mainClass, mainID, mainArgs);
if ((*env)->ExceptionOccurred(env)) {
/*
* Formerly, we used to call the "uncaughtException" method of
* the main thread group, but this was later shown to be
* unnecessary since the default definition merely printed out
* the same exception stack trace as ExceptionDescribe and
* could never actually be overridden by application programs.
*/
ReportExceptionDescription(env);
goto leave;
}
/*
* Detach the current thread so that it appears to have exited when
* the application's main method exits.
*/
if ((*vm)->DetachCurrentThread(vm) != 0) {
message = "Could not detach main thread.";
messageDest = JNI_TRUE;
goto leave;
}
ret = 0;
message = NULL;
leave:
(*vm)->DestroyJavaVM(vm);
if(message != NULL && !noExitErrorMessage)
ReportErrorMessage(message, messageDest);
return ret;
}
/*
* At this point we have the arguments to the application, and we need to
* check with original stdargs in order to compare which of these truly
* needs expansion. cmdtoargs will specify this if it finds a bare
* (unquoted) argument containing a glob character(s) ie. * or ?
*/
jobjectArray
CreateApplicationArgs(JNIEnv *env, char **strv, int argc)
{
int i, j, idx;
size_t tlen;
jobjectArray outArray, inArray;
char *arg, **nargv;
jboolean needs_expansion = JNI_FALSE;
jmethodID mid;
int stdargc;
StdArg *stdargs;
int *appArgIdx;
int isTool;
jclass cls = GetLauncherHelperClass(env);
NULL_CHECK0(cls);
if (argc == 0) {
return NewPlatformStringArray(env, strv, argc);
}
// the holy grail we need to compare with.
stdargs = JLI_GetStdArgs();
stdargc = JLI_GetStdArgc();
// sanity check, this should never happen
if (argc > stdargc) {
JLI_TraceLauncher("Warning: app args is larger than the original, %d %d\n", argc, stdargc);
JLI_TraceLauncher("passing arguments as-is.\n");
return NewPlatformStringArray(env, strv, argc);
}
// sanity check, match the args we have, to the holy grail
idx = JLI_GetAppArgIndex();
isTool = (idx == 0);
if (isTool) { idx++; } // skip tool name
JLI_TraceLauncher("AppArgIndex: %d points to %s\n", idx, stdargs[idx].arg);
appArgIdx = calloc(argc, sizeof(int));
for (i = idx, j = 0; i < stdargc; i++) {
if (isTool) { // filter -J used by tools to pass JVM options
arg = stdargs[i].arg;
if (arg[0] == '-' && arg[1] == 'J') {
continue;
}
}
appArgIdx[j++] = i;
}
// sanity check, ensure same number of arguments for application
if (j != argc) {
JLI_TraceLauncher("Warning: app args count doesn't match, %d %d\n", j, argc);
JLI_TraceLauncher("passing arguments as-is.\n");
JLI_MemFree(appArgIdx);
return NewPlatformStringArray(env, strv, argc);
}
// make a copy of the args which will be expanded in java if required.
nargv = (char **)JLI_MemAlloc(argc * sizeof(char*));
for (i = 0; i < argc; i++) {
jboolean arg_expand;
j = appArgIdx[i];
arg_expand = (JLI_StrCmp(stdargs[j].arg, strv[i]) == 0)
? stdargs[j].has_wildcard
: JNI_FALSE;
if (needs_expansion == JNI_FALSE)
needs_expansion = arg_expand;
// indicator char + String + NULL terminator, the java method will strip
// out the first character, the indicator character, so no matter what
// we add the indicator
tlen = 1 + JLI_StrLen(strv[i]) + 1;
nargv[i] = (char *) JLI_MemAlloc(tlen);
if (JLI_Snprintf(nargv[i], tlen, "%c%s", arg_expand ? 'T' : 'F',
strv[i]) < 0) {
return NULL;
}
JLI_TraceLauncher("%s\n", nargv[i]);
}
if (!needs_expansion) {
// clean up any allocated memory and return back the old arguments
for (i = 0 ; i < argc ; i++) {
JLI_MemFree(nargv[i]);
}
JLI_MemFree(nargv);
JLI_MemFree(appArgIdx);
return NewPlatformStringArray(env, strv, argc);
}
NULL_CHECK0(mid = (*env)->GetStaticMethodID(env, cls,
"expandArgs",
"([Ljava/lang/String;)[Ljava/lang/String;"));
// expand the arguments that require expansion, the java method will strip
// out the indicator character.
NULL_CHECK0(inArray = NewPlatformStringArray(env, nargv, argc));
outArray = (*env)->CallStaticObjectMethod(env, cls, mid, inArray);
for (i = 0; i < argc; i++) {
JLI_MemFree(nargv[i]);
}
JLI_MemFree(nargv);
JLI_MemFree(appArgIdx);
return outArray;
}
jobjectArray
CreateApplicationArgs(JNIEnv *env, char **strv, int argc)
{
return NewPlatformStringArray(env, strv, argc);
}
/*
* At this point we have the arguments to the application, and we need to
* check with original stdargs in order to compare which of these truly
* needs expansion. cmdtoargs will specify this if it finds a bare
* (unquoted) argument containing a glob character(s) ie. * or ?
*/
jobjectArray
CreateApplicationArgs(JNIEnv *env, char **strv, int argc)
{
int i, j, idx, tlen;
jobjectArray outArray, inArray;
char *ostart, *astart, **nargv;
jboolean needs_expansion = JNI_FALSE;
jmethodID mid;
int stdargc;
StdArg *stdargs;
jclass cls = GetLauncherHelperClass(env);
NULL_CHECK0(cls);
if (argc == 0) {
return NewPlatformStringArray(env, strv, argc);
}
// the holy grail we need to compare with.
stdargs = JLI_GetStdArgs();
stdargc = JLI_GetStdArgc();
// sanity check, this should never happen
if (argc > stdargc) {
JLI_TraceLauncher("Warning: app args is larger than the original, %d %d\n", argc, stdargc);
JLI_TraceLauncher("passing arguments as-is.\n");
return NewPlatformStringArray(env, strv, argc);
}
// sanity check, match the args we have, to the holy grail
idx = stdargc - argc;
ostart = stdargs[idx].arg;
astart = strv[0];
// sanity check, ensure that the first argument of the arrays are the same
if (JLI_StrCmp(ostart, astart) != 0) {
// some thing is amiss the args don't match
JLI_TraceLauncher("Warning: app args parsing error\n");
JLI_TraceLauncher("passing arguments as-is\n");
return NewPlatformStringArray(env, strv, argc);
}
// make a copy of the args which will be expanded in java if required.
nargv = (char **)JLI_MemAlloc(argc * sizeof(char*));
for (i = 0, j = idx; i < argc; i++, j++) {
jboolean arg_expand = (JLI_StrCmp(stdargs[j].arg, strv[i]) == 0)
? stdargs[j].has_wildcard
: JNI_FALSE;
if (needs_expansion == JNI_FALSE)
needs_expansion = arg_expand;
// indicator char + String + NULL terminator, the java method will strip
// out the first character, the indicator character, so no matter what
// we add the indicator
tlen = 1 + JLI_StrLen(strv[i]) + 1;
nargv[i] = (char *) JLI_MemAlloc(tlen);
if (JLI_Snprintf(nargv[i], tlen, "%c%s", arg_expand ? 'T' : 'F',
strv[i]) < 0) {
return NULL;
}
JLI_TraceLauncher("%s\n", nargv[i]);
}
if (!needs_expansion) {
// clean up any allocated memory and return back the old arguments
for (i = 0 ; i < argc ; i++) {
JLI_MemFree(nargv[i]);
}
JLI_MemFree(nargv);
return NewPlatformStringArray(env, strv, argc);
}
NULL_CHECK0(mid = (*env)->GetStaticMethodID(env, cls,
"expandArgs",
"([Ljava/lang/String;)[Ljava/lang/String;"));
// expand the arguments that require expansion, the java method will strip
// out the indicator character.
inArray = NewPlatformStringArray(env, nargv, argc);
outArray = (*env)->CallStaticObjectMethod(env, cls, mid, inArray);
for (i = 0; i < argc; i++) {
JLI_MemFree(nargv[i]);
}
JLI_MemFree(nargv);
return outArray;
}
