1 /*
2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <stdlib.h>
27 #include <string.h>
28 #include "jni.h"
29 #include "jni_util.h"
30
31 #ifdef __APPLE__
32 #include <crt_externs.h>
33 #define environ (*_NSGetEnviron())
34 #endif
35 #include <nativehelper/JNIHelp.h>
36
37 #define NATIVE_METHOD(className, functionName, signature) \
38 { #functionName, signature, (void*)(className ## _ ## functionName) }
39
40 JNIEXPORT jobjectArray JNICALL
ProcessEnvironment_environ(JNIEnv * env,jclass ign)41 ProcessEnvironment_environ(JNIEnv *env, jclass ign)
42 {
43 /* This is one of the rare times it's more portable to declare an
44 * external symbol explicitly, rather than via a system header.
45 * The declaration is standardized as part of UNIX98, but there is
46 * no standard (not even de-facto) header file where the
47 * declaration is to be found. See:
48 * http://www.opengroup.org/onlinepubs/007908799/xbd/envvar.html */
49 #ifndef __APPLE__
50 extern char ** environ; /* environ[i] looks like: VAR=VALUE\0 */
51 #endif
52
53 jsize count = 0;
54 jsize i, j;
55 jobjectArray result;
56 jclass byteArrCls = (*env)->FindClass(env, "[B");
57
58 for (i = 0; environ[i]; i++) {
59 /* Ignore corrupted environment variables */
60 if (strchr(environ[i], '=') != NULL)
61 count++;
62 }
63
64 result = (*env)->NewObjectArray(env, 2*count, byteArrCls, 0);
65 if (result == NULL) return NULL;
66
67 for (i = 0, j = 0; environ[i]; i++) {
68 const char * varEnd = strchr(environ[i], '=');
69 /* Ignore corrupted environment variables */
70 if (varEnd != NULL) {
71 jbyteArray var, val;
72 const char * valBeg = varEnd + 1;
73 jsize varLength = varEnd - environ[i];
74 jsize valLength = strlen(valBeg);
75 var = (*env)->NewByteArray(env, varLength);
76 if (var == NULL) return NULL;
77 val = (*env)->NewByteArray(env, valLength);
78 if (val == NULL) return NULL;
79 (*env)->SetByteArrayRegion(env, var, 0, varLength,
80 (jbyte*) environ[i]);
81 (*env)->SetByteArrayRegion(env, val, 0, valLength,
82 (jbyte*) valBeg);
83 (*env)->SetObjectArrayElement(env, result, 2*j , var);
84 (*env)->SetObjectArrayElement(env, result, 2*j+1, val);
85 (*env)->DeleteLocalRef(env, var);
86 (*env)->DeleteLocalRef(env, val);
87 j++;
88 }
89 }
90
91 return result;
92 }
93
94 static JNINativeMethod gMethods[] = {
95 NATIVE_METHOD(ProcessEnvironment, environ, "()[[B"),
96 };
97
register_java_lang_ProcessEnvironment(JNIEnv * env)98 void register_java_lang_ProcessEnvironment(JNIEnv* env) {
99 jniRegisterNativeMethods(env, "java/lang/ProcessEnvironment", gMethods, NELEM(gMethods));
100 }
101