1 /*
2 * Copyright (c) 2003, 2013, 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 #else
35 /* This is one of the rare times it's more portable to declare an
36 * external symbol explicitly, rather than via a system header.
37 * The declaration is standardized as part of UNIX98, but there is
38 * no standard (not even de-facto) header file where the
39 * declaration is to be found. See:
40 * http://www.opengroup.org/onlinepubs/009695399/functions/environ.html
41 * http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_02.html
42 *
43 * "All identifiers in this volume of IEEE Std 1003.1-2001, except
44 * environ, are defined in at least one of the headers" (!)
45 */
46 extern char **environ;
47 #endif
48
49 JNIEXPORT jobjectArray JNICALL
Java_java_lang_ProcessEnvironment_environ(JNIEnv * env,jclass ign)50 Java_java_lang_ProcessEnvironment_environ(JNIEnv *env, jclass ign)
51 {
52 jsize count = 0;
53 jsize i, j;
54 jobjectArray result;
55 jclass byteArrCls = (*env)->FindClass(env, "[B");
56 CHECK_NULL_RETURN(byteArrCls, NULL);
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 CHECK_NULL_RETURN(result, 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 CHECK_NULL_RETURN(var, NULL);
77 val = (*env)->NewByteArray(env, valLength);
78 CHECK_NULL_RETURN(val, 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