/****************************************************************************
* libc/syslog/lib_syslog.c
*
* Copyright (C) 2007-2009, 2011-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <syslog.h>
#include <nuttx/clock.h>
#include <nuttx/streams.h>
#include "syslog/syslog.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Global Function Prototypes
****************************************************************************/
/****************************************************************************
* Global Constant Data
****************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Private Constant Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: vsyslog_internal
*
* Description:
* This is the internal implementation of vsyslog (see the description of
* syslog and vsyslog below)
*
****************************************************************************/
static inline int vsyslog_internal(FAR const char *fmt, va_list ap)
{
#if defined(CONFIG_SYSLOG)
struct lib_outstream_s stream;
#elif CONFIG_NFILE_DESCRIPTORS > 0
struct lib_rawoutstream_s stream;
#elif defined(CONFIG_ARCH_LOWPUTC)
struct lib_outstream_s stream;
#endif
#if defined(CONFIG_SYSLOG_TIMESTAMP)
struct timespec ts;
int ret;
/* Get the current time */
ret = clock_systimespec(&ts);
#endif
#if defined(CONFIG_SYSLOG)
/* Wrap the low-level output in a stream object and let lib_vsprintf
* do the work.
*/
lib_syslogstream((FAR struct lib_outstream_s *)&stream);
#if defined(CONFIG_SYSLOG_TIMESTAMP)
/* Pre-pend the message with the current time */
if (ret == OK)
{
(void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
"[%6d.%06d]",
ts.tv_sec, ts.tv_nsec/1000);
}
#endif
return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
#elif CONFIG_NFILE_DESCRIPTORS > 0
/* Wrap the stdout in a stream object and let lib_vsprintf
* do the work.
*/
lib_rawoutstream(&stream, 1);
#if defined(CONFIG_SYSLOG_TIMESTAMP)
/* Pre-pend the message with the current time */
if (ret == OK)
{
(void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
"[%6d.%06d]",
ts.tv_sec, ts.tv_nsec/1000);
}
#endif
return lib_vsprintf(&stream.public, fmt, ap);
#elif defined(CONFIG_ARCH_LOWPUTC)
/* Wrap the low-level output in a stream object and let lib_vsprintf
* do the work.
*/
lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
#if defined(CONFIG_SYSLOG_TIMESTAMP)
/* Pre-pend the message with the current time */
if (ret == OK)
{
(void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
"[%6d.%06d]",
ts.tv_sec, ts.tv_nsec/1000);
}
#endif
return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
#else /* CONFIG_SYSLOG */
return 0;
#endif /* CONFIG_SYSLOG */
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: vsyslog
*
* Description:
* The function vsyslog() performs the same task as syslog() with the
* difference that it takes a set of arguments which have been obtained
* using the stdarg variable argument list macros.
*
****************************************************************************/
int vsyslog(int priority, FAR const char *fmt, va_list ap)
{
int ret = 0;
/* Check if this priority is enabled */
if ((g_syslog_mask & LOG_MASK(priority)) != 0)
{
/* Yes.. let vsylog_internal do the deed */
ret = vsyslog_internal(fmt, ap);
}
return ret;
}
/****************************************************************************
* Name: syslog
*
* Description:
* syslog() generates a log message. The priority argument is formed by
* ORing the facility and the level values (see include/syslog.h). The
* remaining arguments are a format, as in printf and any arguments to the
* format.
*
* The NuttX implementation does not support any special formatting
* characters beyond those supported by printf.
*
****************************************************************************/
int syslog(int priority, FAR const char *fmt, ...)
{
va_list ap;
int ret;
/* Let vsyslog do the work */
va_start(ap, fmt);
ret = vsyslog(priority, fmt, ap);
va_end(ap);
return ret;
}
