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 <nativehelper/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 30namespace android { 31 32static 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 53static const JNINativeMethod g_methods[] = { 54 { "native_measureDirectory", "(Ljava/lang/String;)J", (void*)native_measureDirectory }, 55}; 56 57int 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 68int 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