1/*
2 * Copyright (C) 2011 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 "SerialServiceJNI"
18#include "utils/Log.h"
19
20#include "jni.h"
21#include "JNIHelp.h"
22#include "android_runtime/AndroidRuntime.h"
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <fcntl.h>
27
28namespace android
29{
30
31static struct parcel_file_descriptor_offsets_t
32{
33    jclass mClass;
34    jmethodID mConstructor;
35} gParcelFileDescriptorOffsets;
36
37static jobject android_server_SerialService_open(JNIEnv *env, jobject /* thiz */, jstring path)
38{
39    const char *pathStr = env->GetStringUTFChars(path, NULL);
40
41    int fd = open(pathStr, O_RDWR | O_NOCTTY);
42    if (fd < 0) {
43        ALOGE("could not open %s", pathStr);
44        env->ReleaseStringUTFChars(path, pathStr);
45        return NULL;
46    }
47    env->ReleaseStringUTFChars(path, pathStr);
48
49    jobject fileDescriptor = jniCreateFileDescriptor(env, fd);
50    if (fileDescriptor == NULL) {
51        return NULL;
52    }
53    return env->NewObject(gParcelFileDescriptorOffsets.mClass,
54        gParcelFileDescriptorOffsets.mConstructor, fileDescriptor);
55}
56
57
58static const JNINativeMethod method_table[] = {
59    { "native_open",                "(Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;",
60                                    (void*)android_server_SerialService_open },
61};
62
63int register_android_server_SerialService(JNIEnv *env)
64{
65    jclass clazz = env->FindClass("com/android/server/SerialService");
66    if (clazz == NULL) {
67        ALOGE("Can't find com/android/server/SerialService");
68        return -1;
69    }
70
71    clazz = env->FindClass("android/os/ParcelFileDescriptor");
72    LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor");
73    gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
74    gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "(Ljava/io/FileDescriptor;)V");
75    LOG_FATAL_IF(gParcelFileDescriptorOffsets.mConstructor == NULL,
76                 "Unable to find constructor for android.os.ParcelFileDescriptor");
77
78    return jniRegisterNativeMethods(env, "com/android/server/SerialService",
79            method_table, NELEM(method_table));
80}
81
82};
83