115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
/****************************************************************************
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* drivers/syslog/vsyslog.c
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*
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* Copyright (C) 2007-2009, 2011-2014, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <syslog.h>
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#include <nuttx/init.h>
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#include <nuttx/arch.h>
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#include <nuttx/clock.h>
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#include <nuttx/streams.h>
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#include <nuttx/syslog/syslog.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: _vsyslog
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*
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* Description:
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* _vsyslog() handles the system logging system calls. It is functionally
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* equivalent to vsyslog() except that (1) the per-process priority
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* filtering has already been performed and the va_list parameter is
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* passed by reference. That is because the va_list is a structure in
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* some compilers and passing of structures in the NuttX sycalls does
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* not work.
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*
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****************************************************************************/
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int _vsyslog(int priority, FAR const IPTR char *fmt, FAR va_list *ap)
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{
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struct lib_outstream_s stream;
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#ifdef CONFIG_SYSLOG_TIMESTAMP
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struct timespec ts;
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/* Get the current time. Since debug output may be generated very early
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* in the start-up sequence, hardware timer support may not yet be
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* available.
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*/
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if (!OSINIT_HW_READY() || clock_systimespec(&ts) < 0)
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{
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/* Timer hardware is not available, or clock_systimespec failed */
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ts.tv_sec = 0;
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ts.tv_nsec = 0;
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}
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#endif
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/* Wrap the low-level output in a stream object and let lib_vsprintf
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* do the work. NOTE that emergency priority output is handled
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* differently.. it will use the SYSLOG emergency stream.
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*/
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if (priority == LOG_EMERG)
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{
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/* Use the SYSLOG emergency stream */
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emergstream((FAR struct lib_outstream_s *)&stream);
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}
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else
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{
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/* Use the normal SYSLOG stream */
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syslogstream((FAR struct lib_outstream_s *)&stream);
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}
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#if defined(CONFIG_SYSLOG_TIMESTAMP)
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/* Pre-pend the message with the current time, if available */
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(void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
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"[%6d.%06d]", ts.tv_sec, ts.tv_nsec/1000);
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#endif
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return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, *ap);
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}
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