1 /*
2 * Copyright (C) 2010 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 "DefContainer-JNI"
18
19 #include <JNIHelp.h>
20
21 #include <diskusage/dirsize.h>
22 #include <utils/Log.h>
23
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <string.h>
29
30 namespace android {
31
native_measureDirectory(JNIEnv * env,jobject,jstring directory)32 static jlong native_measureDirectory(JNIEnv* env, jobject /* clazz */, jstring directory) {
33 jlong ret = 0L;
34
35 const char* path = env->GetStringUTFChars(directory, NULL);
36 if (path == NULL) {
37 return ret;
38 }
39
40 int dirfd = open(path, O_DIRECTORY, O_RDONLY);
41 if (dirfd < 0) {
42 ALOGI("error opening: %s: %s", path, strerror(errno));
43 } else {
44 ret = calculate_dir_size(dirfd);
45 close(dirfd);
46 }
47
48 env->ReleaseStringUTFChars(directory, path);
49
50 return ret;
51 }
52
53 static const JNINativeMethod g_methods[] = {
54 { "native_measureDirectory", "(Ljava/lang/String;)J", (void*)native_measureDirectory },
55 };
56
register_com_android_defcontainer(JNIEnv * env)57 int register_com_android_defcontainer(JNIEnv *env) {
58 if (jniRegisterNativeMethods(
59 env, "com/android/defcontainer/MeasurementUtils", g_methods, NELEM(g_methods)) < 0) {
60 return JNI_ERR;
61 }
62
63 return JNI_VERSION_1_6;
64 }
65
66 } // namespace android
67
JNI_OnLoad(JavaVM * jvm,void *)68 int JNI_OnLoad(JavaVM *jvm, void* /* reserved */) {
69 JNIEnv *env;
70
71 if (jvm->GetEnv((void**)&env, JNI_VERSION_1_6)) {
72 return JNI_ERR;
73 }
74
75 return android::register_com_android_defcontainer(env);
76 }
77