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 <nativehelper/JNIPlatformHelp.h>
22 #include "android_runtime/AndroidRuntime.h"
23
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <fcntl.h>
27
28 namespace android
29 {
30
31 static struct parcel_file_descriptor_offsets_t
32 {
33 jclass mClass;
34 jmethodID mConstructor;
35 } gParcelFileDescriptorOffsets;
36
android_server_SerialService_open(JNIEnv * env,jobject,jstring path)37 static 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 close(fd);
52 return NULL;
53 }
54 return env->NewObject(gParcelFileDescriptorOffsets.mClass,
55 gParcelFileDescriptorOffsets.mConstructor, fileDescriptor);
56 }
57
58
59 static const JNINativeMethod method_table[] = {
60 { "native_open", "(Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;",
61 (void*)android_server_SerialService_open },
62 };
63
register_android_server_SerialService(JNIEnv * env)64 int register_android_server_SerialService(JNIEnv *env)
65 {
66 jclass clazz = env->FindClass("com/android/server/SerialService");
67 if (clazz == NULL) {
68 ALOGE("Can't find com/android/server/SerialService");
69 return -1;
70 }
71
72 clazz = env->FindClass("android/os/ParcelFileDescriptor");
73 LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor");
74 gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
75 gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "(Ljava/io/FileDescriptor;)V");
76 LOG_FATAL_IF(gParcelFileDescriptorOffsets.mConstructor == NULL,
77 "Unable to find constructor for android.os.ParcelFileDescriptor");
78
79 return jniRegisterNativeMethods(env, "com/android/server/SerialService",
80 method_table, NELEM(method_table));
81 }
82
83 };
84