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incubator-nuttx/drivers/syslog/vsyslog.c

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/****************************************************************************
* drivers/syslog/vsyslog.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <syslog.h>
#include <errno.h>
#include <nuttx/arch.h>
#include <nuttx/init.h>
#include <nuttx/clock.h>
#include <nuttx/streams.h>
#include <nuttx/syslog/syslog.h>
#include "syslog.h"
/****************************************************************************
* Private Data
****************************************************************************/
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT)
static FAR const char * const g_priority_color[] =
{
"\e[31;1;5m", /* LOG_EMERG, Red, Bold, Blinking */
"\e[31;1m", /* LOG_ALERT, Red, Bold */
"\e[31;1m", /* LOG_CRIT, Red, Bold */
"\e[31m", /* LOG_ERR, Red */
"\e[33m", /* LOG_WARNING, Yellow */
"\e[1m", /* LOG_NOTICE, Bold */
"", /* LOG_INFO, Normal */
"\e[2m", /* LOG_DEBUG, Dim */
};
#endif
#if defined(CONFIG_SYSLOG_PRIORITY)
static FAR const char * const g_priority_str[] =
{
"EMERG", "ALERT", "CRIT", "ERROR",
"WARN", "NOTICE", "INFO", "DEBUG"
};
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_vsyslog
*
* Description:
* nx_vsyslog() handles the system logging system calls. It is functionally
* equivalent to vsyslog() except that (1) the per-process priority
* filtering has already been performed and the va_list parameter is
* passed by reference. That is because the va_list is a structure in
* some compilers and passing of structures in the NuttX sycalls does
* not work.
*
****************************************************************************/
int nx_vsyslog(int priority, FAR const IPTR char *fmt, FAR va_list *ap)
{
struct lib_syslograwstream_s stream;
int ret = 0;
#ifdef CONFIG_SYSLOG_PROCESS_NAME
FAR struct tcb_s *tcb = nxsched_get_tcb(nxsched_gettid());
#endif
#ifdef CONFIG_SYSLOG_TIMESTAMP
struct timespec ts;
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
struct tm tm;
char date_buf[CONFIG_SYSLOG_TIMESTAMP_BUFFER];
# endif
#endif
/* Wrap the low-level output in a stream object and let lib_vsprintf
* do the work.
*/
lib_syslograwstream_open(&stream);
#ifdef CONFIG_SYSLOG_TIMESTAMP
ts.tv_sec = 0;
ts.tv_nsec = 0;
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
memset(&tm, 0, sizeof(tm));
# endif
/* Get the current time. Since debug output may be generated very early
* in the start-up sequence, hardware timer support may not yet be
* available.
*/
if (OSINIT_HW_READY())
{
# if defined(CONFIG_SYSLOG_TIMESTAMP_REALTIME)
/* Use CLOCK_REALTIME if so configured */
clock_gettime(CLOCK_REALTIME, &ts);
# else
/* Prefer monotonic when enabled, as it can be synchronized to
* RTC with clock_resynchronize.
*/
clock_gettime(CLOCK_MONOTONIC, &ts);
# endif
/* Prepend the message with the current time, if available */
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
# if defined(CONFIG_SYSLOG_TIMESTAMP_LOCALTIME)
localtime_r(&ts.tv_sec, &tm);
# else
gmtime_r(&ts.tv_sec, &tm);
# endif
# endif
}
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
date_buf[0] = '\0';
strftime(date_buf, CONFIG_SYSLOG_TIMESTAMP_BUFFER,
CONFIG_SYSLOG_TIMESTAMP_FORMAT, &tm);
# endif
#endif
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT) || defined(CONFIG_SYSLOG_TIMESTAMP) || \
defined(CONFIG_SMP) || defined(CONFIG_SYSLOG_PROCESSID) || \
defined(CONFIG_SYSLOG_PRIORITY) || defined(CONFIG_SYSLOG_PREFIX) || \
defined(CONFIG_SYSLOG_PROCESS_NAME)
ret = lib_sprintf_internal(&stream.common,
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT)
/* Reset the terminal style. */
"\e[0m"
#endif
#ifdef CONFIG_SYSLOG_TIMESTAMP
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMAT_MICROSECOND)
"[%s.%06ld] "
# else
"[%s] "
# endif
# else
"[%5ju.%06ld] "
# endif
#endif
#if defined(CONFIG_SMP)
"[CPU%d] "
#endif
#if defined(CONFIG_SYSLOG_PROCESSID)
/* Prepend the Thread ID */
"[%2d] "
#endif
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT)
/* Set the terminal style according to message priority. */
"%s"
#endif
#if defined(CONFIG_SYSLOG_PRIORITY)
/* Prepend the message priority. */
"[%6s] "
#endif
#if defined(CONFIG_SYSLOG_PREFIX)
/* Prepend the prefix, if available */
"[%s] "
#endif
#ifdef CONFIG_SYSLOG_PROCESS_NAME
/* Prepend the thread name */
"%s: "
#endif
#ifdef CONFIG_SYSLOG_TIMESTAMP
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMATTED)
# if defined(CONFIG_SYSLOG_TIMESTAMP_FORMAT_MICROSECOND)
, date_buf, ts.tv_nsec / NSEC_PER_USEC
# else
, date_buf
# endif
# else
, (uintmax_t)ts.tv_sec
, ts.tv_nsec / NSEC_PER_USEC
# endif
#endif
#if defined(CONFIG_SMP)
, this_cpu()
#endif
#if defined(CONFIG_SYSLOG_PROCESSID)
/* Prepend the Thread ID */
, nxsched_gettid()
#endif
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT)
/* Set the terminal style according to message priority. */
, g_priority_color[priority]
#endif
#if defined(CONFIG_SYSLOG_PRIORITY)
/* Prepend the message priority. */
, g_priority_str[priority]
#endif
#if defined(CONFIG_SYSLOG_PREFIX)
/* Prepend the prefix, if available */
, CONFIG_SYSLOG_PREFIX_STRING
#endif
#ifdef CONFIG_SYSLOG_PROCESS_NAME
/* Prepend the thread name */
, get_task_name(tcb)
#endif
);
#endif /* CONFIG_SYSLOG_COLOR_OUTPUT || CONFIG_SYSLOG_TIMESTAMP || ... */
/* Generate the output */
ret += lib_vsprintf_internal(&stream.common, fmt, *ap);
if (stream.last_ch != '\n')
{
lib_stream_putc(&stream.common, '\n');
ret++;
}
#if defined(CONFIG_SYSLOG_COLOR_OUTPUT)
/* Reset the terminal style back to normal. */
ret += lib_stream_puts(&stream.common, "\e[0m", sizeof("\e[0m"));
#endif
/* Flush and destroy the syslog stream buffer */
lib_syslograwstream_close(&stream);
return ret;
}
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