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93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "jni.h"
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#include "jni_util.h"
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#ifdef __APPLE__
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#include <crt_externs.h>
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#define environ (*_NSGetEnviron())
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#else
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/* This is one of the rare times it's more portable to declare an
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* external symbol explicitly, rather than via a system header.
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* The declaration is standardized as part of UNIX98, but there is
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* no standard (not even de-facto) header file where the
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* declaration is to be found. See:
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* http://www.opengroup.org/onlinepubs/009695399/functions/environ.html
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* http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_02.html
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*
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* "All identifiers in this volume of IEEE Std 1003.1-2001, except
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* environ, are defined in at least one of the headers" (!)
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*/
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extern char **environ;
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#endif
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JNIEXPORT jobjectArray JNICALL
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Java_java_lang_ProcessEnvironment_environ(JNIEnv *env, jclass ign)
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{
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jsize count = 0;
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jsize i, j;
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jobjectArray result;
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jclass byteArrCls = (*env)->FindClass(env, "[B");
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CHECK_NULL_RETURN(byteArrCls, NULL);
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for (i = 0; environ[i]; i++) {
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/* Ignore corrupted environment variables */
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if (strchr(environ[i], '=') != NULL)
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count++;
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}
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result = (*env)->NewObjectArray(env, 2*count, byteArrCls, 0);
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CHECK_NULL_RETURN(result, NULL);
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for (i = 0, j = 0; environ[i]; i++) {
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const char * varEnd = strchr(environ[i], '=');
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/* Ignore corrupted environment variables */
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if (varEnd != NULL) {
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jbyteArray var, val;
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const char * valBeg = varEnd + 1;
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jsize varLength = varEnd - environ[i];
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jsize valLength = strlen(valBeg);
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var = (*env)->NewByteArray(env, varLength);
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CHECK_NULL_RETURN(var, NULL);
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val = (*env)->NewByteArray(env, valLength);
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CHECK_NULL_RETURN(val, NULL);
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(*env)->SetByteArrayRegion(env, var, 0, varLength,
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(jbyte*) environ[i]);
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(*env)->SetByteArrayRegion(env, val, 0, valLength,
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(jbyte*) valBeg);
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(*env)->SetObjectArrayElement(env, result, 2*j , var);
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(*env)->SetObjectArrayElement(env, result, 2*j+1, val);
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(*env)->DeleteLocalRef(env, var);
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(*env)->DeleteLocalRef(env, val);
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j++;
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}
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}
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return result;
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}
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