b01e8bf57b
SerialManager: provides access to serial ports SerialPort: for reading and writing data to and from serial ports IO with both array based and direct ByteBuffers is supported. Accessing serial ports requires android.permission.SERIAL_PORT permission Each platform must configure list of supported serial ports in the config_serialPorts resource overlay (this is needed to prevent apps from accidentally accessing the bluetooth or other system UARTs). In addition, the platform uevent.rc file must set the owner to the /dev/tty* files to "system" so the framework can access the port. Signed-off-by: Mike Lockwood <lockwood@android.com>
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "SerialServiceJNI"
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#include "utils/Log.h"
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#include "jni.h"
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#include "JNIHelp.h"
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#include "android_runtime/AndroidRuntime.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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namespace android
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{
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static struct parcel_file_descriptor_offsets_t
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{
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jclass mClass;
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jmethodID mConstructor;
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} gParcelFileDescriptorOffsets;
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static jobject android_server_SerialService_open(JNIEnv *env, jobject thiz, jstring path)
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{
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const char *pathStr = env->GetStringUTFChars(path, NULL);
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int fd = open(pathStr, O_RDWR | O_NOCTTY);
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if (fd < 0) {
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ALOGE("could not open %s", pathStr);
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env->ReleaseStringUTFChars(path, pathStr);
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return NULL;
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}
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env->ReleaseStringUTFChars(path, pathStr);
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jobject fileDescriptor = jniCreateFileDescriptor(env, fd);
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if (fileDescriptor == NULL) {
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return NULL;
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}
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return env->NewObject(gParcelFileDescriptorOffsets.mClass,
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gParcelFileDescriptorOffsets.mConstructor, fileDescriptor);
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}
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static JNINativeMethod method_table[] = {
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{ "native_open", "(Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;",
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(void*)android_server_SerialService_open },
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};
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int register_android_server_SerialService(JNIEnv *env)
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{
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jclass clazz = env->FindClass("com/android/server/SerialService");
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if (clazz == NULL) {
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ALOGE("Can't find com/android/server/SerialService");
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return -1;
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}
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clazz = env->FindClass("android/os/ParcelFileDescriptor");
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LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor");
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gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
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gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "(Ljava/io/FileDescriptor;)V");
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LOG_FATAL_IF(gParcelFileDescriptorOffsets.mConstructor == NULL,
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"Unable to find constructor for android.os.ParcelFileDescriptor");
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return jniRegisterNativeMethods(env, "com/android/server/SerialService",
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method_table, NELEM(method_table));
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}
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};
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