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/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
* Not a Contribution.
*
* Copyright (C) 2007-2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <assert.h>
#include <cutils/properties.h>
#include <utils/String8.h>
#include <android_runtime/Log.h>
#include <utils/Log.h>
#ifdef __BIONIC__
#include <android/set_abort_message.h>
#endif
#include <utils/Log.h>
#include "jni.h"
#include "JNIHelp.h"
#include "utils/misc.h"
#include "android_runtime/AndroidRuntime.h"
#define LOG_BUF_SIZE 1024
#define SEEMP_SOCK_NAME "/dev/socket/seempdw"
#ifndef __unused
#define __unused __attribute__((__unused__))
#endif
static int __write_to_log_init(struct iovec *vec, size_t nr);
static int (*write_to_log)(struct iovec *vec, size_t nr) = __write_to_log_init;
static int logd_fd = -1;
/* give up, resources too limited */
static int __write_to_log_null(struct iovec *vec __unused,
size_t nr __unused)
{
return -1;
}
/* log_init_lock assumed */
static int __write_to_log_initialize()
{
int i, ret = 0;
if (logd_fd >= 0) {
i = logd_fd;
logd_fd = -1;
close(i);
}
i = socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (i < 0) {
ret = -errno;
write_to_log = __write_to_log_null;
} else if (fcntl(i, F_SETFL, O_NONBLOCK) < 0) {
ret = -errno;
close(i);
i = -1;
write_to_log = __write_to_log_null;
} else {
struct sockaddr_un un;
memset(&un, 0, sizeof(struct sockaddr_un));
un.sun_family = AF_UNIX;
strlcpy(un.sun_path, SEEMP_SOCK_NAME, sizeof(un.sun_path));
if (connect(i, (struct sockaddr *)&un, sizeof(struct sockaddr_un)) < 0) {
ret = -errno;
close(i);
i = -1;
}
}
logd_fd = i;
return ret;
}
static int __write_to_log_socket(struct iovec *vec, size_t nr)
{
ssize_t ret;
if (logd_fd < 0) {
return -EBADF;
}
/*
* The write below could be lost, but will never block.
*
* ENOTCONN occurs if logd dies.
* EAGAIN occurs if logd is overloaded.
*/
ret = writev(logd_fd, vec, nr);
if (ret < 0) {
ret = -errno;
if (ret == -ENOTCONN) {
ret = __write_to_log_initialize();
if (ret < 0) {
return ret;
}
ret = writev(logd_fd, vec, nr);
if (ret < 0) {
ret = -errno;
}
}
}
return ret;
}
static int __write_to_log_init(struct iovec *vec, size_t nr)
{
if (write_to_log == __write_to_log_init) {
int ret;
ret = __write_to_log_initialize();
if (ret < 0) {
return ret;
}
write_to_log = __write_to_log_socket;
}
return write_to_log(vec, nr);
}
int __android_seemp_socket_write(int len, const char *msg)
{
struct iovec vec;
vec.iov_base = (void *) msg;
vec.iov_len = len;
return write_to_log(&vec, 1);
}
namespace android {
/*
* In class android.util.Log:
* public static native int println_native(int buffer, int priority, String tag, String msg)
*/
static jint android_util_SeempLog_println_native(JNIEnv* env, jobject clazz,
jint api, jstring msgObj)
{
if (msgObj == NULL) {
jniThrowNullPointerException(env, "seemp_println needs a message");
return -1;
}
int apiId = (int)api;
int apiIdLen = sizeof(apiId);
int utf8MsgLen = env->GetStringUTFLength(msgObj);
int len = apiIdLen + 1 + utf8MsgLen + 1;
char *msg = (char*)malloc(len);
if ( NULL == msg )
{
return -1;
}
char *params = msg + apiIdLen + 1; // api_id + encoding byte + params
*((int*)msg) = apiId; // copy api id
// // skip encoding byte
env->GetStringUTFRegion(msgObj, 0, env->GetStringLength(msgObj), params); // copy message
msg[len - 1] = 0; // copy terminating zero
int res = __android_seemp_socket_write(len, msg); // send message
free(msg);
return res;
}
/*
* JNI registration.
*/
static JNINativeMethod gMethods[] = {
/* name, signature, funcPtr */
{ "seemp_println_native", "(ILjava/lang/String;)I",
(void*) android_util_SeempLog_println_native },
};
int register_android_util_SeempLog(JNIEnv* env)
{
jclass clazz = env->FindClass("android/util/SeempLog");
if (clazz == NULL) {
return -1;
}
return AndroidRuntime::registerNativeMethods(env, "android/util/SeempLog", gMethods,
NELEM(gMethods));
}
}; // namespace android
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