1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "System"
18
19 #include "JNIHelp.h"
20 #include "JniConstants.h"
21 #include "ScopedUtfChars.h"
22 #include "cutils/log.h"
23 #include "openssl/opensslv.h"
24 #include "toStringArray.h"
25 #include "zlib.h"
26
27 #include <string>
28 #include <vector>
29
30 #include <limits.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34
System_log(JNIEnv * env,jclass,jchar type,jstring javaMessage,jthrowable exception)35 static void System_log(JNIEnv* env, jclass, jchar type, jstring javaMessage, jthrowable exception) {
36 ScopedUtfChars message(env, javaMessage);
37 if (message.c_str() == NULL) {
38 // Since this function is used for last-gasp debugging output, be noisy on failure.
39 ALOGE("message.c_str() == NULL");
40 return;
41 }
42 int priority;
43 switch (type) {
44 case 'D': case 'd': priority = ANDROID_LOG_DEBUG; break;
45 case 'E': case 'e': priority = ANDROID_LOG_ERROR; break;
46 case 'F': case 'f': priority = ANDROID_LOG_FATAL; break;
47 case 'I': case 'i': priority = ANDROID_LOG_INFO; break;
48 case 'S': case 's': priority = ANDROID_LOG_SILENT; break;
49 case 'V': case 'v': priority = ANDROID_LOG_VERBOSE; break;
50 case 'W': case 'w': priority = ANDROID_LOG_WARN; break;
51 default: priority = ANDROID_LOG_DEFAULT; break;
52 }
53 LOG_PRI(priority, LOG_TAG, "%s", message.c_str());
54 if (exception != NULL) {
55 jniLogException(env, priority, LOG_TAG, exception);
56 }
57 }
58
59 // Sets a field via JNI. Used for the standard streams, which are read-only otherwise.
System_setFieldImpl(JNIEnv * env,jclass clazz,jstring javaName,jstring javaSignature,jobject object)60 static void System_setFieldImpl(JNIEnv* env, jclass clazz,
61 jstring javaName, jstring javaSignature, jobject object) {
62 ScopedUtfChars name(env, javaName);
63 if (name.c_str() == NULL) {
64 return;
65 }
66 ScopedUtfChars signature(env, javaSignature);
67 if (signature.c_str() == NULL) {
68 return;
69 }
70 jfieldID fieldID = env->GetStaticFieldID(clazz, name.c_str(), signature.c_str());
71 env->SetStaticObjectField(clazz, fieldID, object);
72 }
73
System_specialProperties(JNIEnv * env,jclass)74 static jobjectArray System_specialProperties(JNIEnv* env, jclass) {
75 std::vector<std::string> properties;
76
77 char path[PATH_MAX];
78 properties.push_back(std::string("user.dir=") + getcwd(path, sizeof(path)));
79
80 properties.push_back("android.zlib.version=" ZLIB_VERSION);
81 properties.push_back("android.openssl.version=" OPENSSL_VERSION_TEXT);
82
83 return toStringArray(env, properties);
84 }
85
86 static JNINativeMethod gMethods[] = {
87 NATIVE_METHOD(System, log, "(CLjava/lang/String;Ljava/lang/Throwable;)V"),
88 NATIVE_METHOD(System, setFieldImpl, "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;)V"),
89 NATIVE_METHOD(System, specialProperties, "()[Ljava/lang/String;"),
90 };
register_java_lang_System(JNIEnv * env)91 void register_java_lang_System(JNIEnv* env) {
92 jniRegisterNativeMethods(env, "java/lang/System", gMethods, NELEM(gMethods));
93 }
94