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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <time.h>
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <fcntl.h>
#include "logd.h"
/* should match system/core/include/cutils/logger.h */
#define LOGGER_LOG_MAIN "log/main"
#define LOGGER_LOG_RADIO "log/radio"
#define LOGGER_LOG_EVENTS "log/events"
#define LOGGER_LOG_SYSTEM "log/system"
#include <pthread.h>
#define LOG_BUF_SIZE 1024
typedef enum {
LOG_ID_NONE = 0,
LOG_ID_MAIN,
LOG_ID_RADIO,
LOG_ID_MAX
} log_id_t;
/* logger handles writing to object, pointed by log channel id */
typedef int (*logger_function_t)(log_id_t log_id, struct iovec *vec);
typedef struct {
logger_function_t logger;
int fd;
const char *path;
} log_channel_t;
static int __write_to_log_init(log_id_t log_id, struct iovec *vec);
static int __write_to_log_null(log_id_t log_id, struct iovec *vec);
static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER;
static log_channel_t log_channels[LOG_ID_MAX] = {
{ __write_to_log_null, -1, NULL },
{ __write_to_log_init, -1, "/dev/"LOGGER_LOG_MAIN },
{ __write_to_log_init, -1, "/dev/"LOGGER_LOG_RADIO }
};
static int __write_to_log_null(log_id_t log_id, struct iovec *vec)
{
/*
* ALTERED behaviour from previous version
* always returns successful result
*/
int i = 0;
size_t res = 0;
for ( ; i < 3; ++i) {
res += vec[i].iov_len;
}
return (int)res;
}
/*
* it's supposed, that log_id contains valid id always.
* this check must be performed in higher level functions
*/
static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec)
{
ssize_t ret;
do {
ret = writev(log_channels[log_id].fd, vec, 3);
} while ((ret < 0) && (errno == EINTR));
return ret;
}
static int __write_to_log_init(log_id_t log_id, struct iovec *vec)
{
if ((LOG_ID_NONE < log_id) && (log_id < LOG_ID_MAX)) {
pthread_mutex_lock(&log_init_lock);
int fd = open(log_channels[log_id].path, O_WRONLY);
log_channels[log_id].logger =
(fd < 0) ? __write_to_log_null : __write_to_log_kernel;
log_channels[log_id].fd = fd;
log_channels[log_id].fd = fd;
pthread_mutex_unlock(&log_init_lock);
return log_channels[log_id].logger(log_id, vec);
}
/* log_id is invalid */
return -1;
}
static int __android_log_write(int prio, const char *tag, const char *msg)
{
struct iovec vec[3];
log_id_t log_id = LOG_ID_MAIN;
if (tag == NULL)
tag = "";
if (!strcmp(tag, "HTC_RIL"))
log_id = LOG_ID_RADIO;
vec[0].iov_base = (unsigned char *) &prio;
vec[0].iov_len = 1;
vec[1].iov_base = (void *) tag;
vec[1].iov_len = strlen(tag) + 1;
vec[2].iov_base = (void *) msg;
vec[2].iov_len = strlen(msg) + 1;
return log_channels[log_id].logger(log_id, vec);
}
int __libc_android_log_vprint(int prio, const char *tag, const char *fmt,
va_list ap)
{
char buf[LOG_BUF_SIZE];
vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
return __android_log_write(prio, tag, buf);
}
int __libc_android_log_print(int prio, const char *tag, const char *fmt, ...)
{
va_list ap;
char buf[LOG_BUF_SIZE];
va_start(ap, fmt);
vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
va_end(ap);
return __android_log_write(prio, tag, buf);
}
int __libc_android_log_assert(const char *cond, const char *tag,
const char *fmt, ...)
{
va_list ap;
char buf[LOG_BUF_SIZE];
va_start(ap, fmt);
vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
va_end(ap);
__android_log_write(ANDROID_LOG_FATAL, tag, buf);
exit(1);
return -1;
}
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