android_system_core/liblog/log_event_write.c

/*
 * Copyright (C) 2015 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 <log/log.h>

#include "log_portability.h"

#define MAX_SUBTAG_LEN 32

LIBLOG_ABI_PUBLIC int __android_log_error_write(
        int tag,
        const char *subTag,
        int32_t uid,
        const char *data, uint32_t dataLen)
{
    int ret = -EINVAL;

    if (subTag && (data || !dataLen)) {
        android_log_context ctx = create_android_logger(tag);

        ret = -ENOMEM;
        if (ctx) {
            ret = android_log_write_string8_len(ctx, subTag, MAX_SUBTAG_LEN);
            if (ret >= 0) {
                ret = android_log_write_int32(ctx, uid);
                if (ret >= 0) {
                    ret = android_log_write_string8_len(ctx, data, dataLen);
                    if (ret >= 0) {
                        ret = android_log_write_list(ctx, LOG_ID_EVENTS);
                    }
                }
            }
            android_log_destroy(&ctx);
        }
    }
    return ret;
}