174 lines
5.4 KiB
C
174 lines
5.4 KiB
C
/****************************************************************************
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* drivers/syslog/syslog_channel.c
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*
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* Copyright (C) 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 <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/syslog/syslog.h>
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#ifdef CONFIG_RAMLOG_SYSLOG
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# include <nuttx/syslog/ramlog.h>
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#elif defined(CONFIG_SYSLOG_RPMSG)
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# include <nuttx/syslog/syslog_rpmsg.h>
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#elif defined(CONFIG_ARCH_LOWPUTC)
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# include <nuttx/arch.h>
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#endif
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#include "syslog.h"
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#if defined(CONFIG_ARCH_LOWPUTC)
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# define HAVE_LOWPUTC
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#elif !defined(CONFIG_RAMLOG_SYSLOG) && !defined(CONFIG_SYSLOG_RPMSG)
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# define NEED_LOWPUTC
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#endif
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#ifdef NEED_LOWPUTC
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static int syslog_default_putc(int ch);
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#endif
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static int syslog_default_flush(void);
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#if defined(CONFIG_RAMLOG_SYSLOG)
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static const struct syslog_channel_s g_default_channel =
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{
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ramlog_putc,
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ramlog_putc,
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syslog_default_flush
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};
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#elif defined(CONFIG_SYSLOG_RPMSG)
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static const struct syslog_channel_s g_default_channel =
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{
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syslog_rpmsg_putc,
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syslog_rpmsg_putc,
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syslog_default_flush
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};
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#elif defined(HAVE_LOWPUTC)
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static const struct syslog_channel_s g_default_channel =
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{
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up_putc,
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up_putc,
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syslog_default_flush
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};
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#else
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static const struct syslog_channel_s g_default_channel =
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{
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syslog_default_putc,
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syslog_default_putc,
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syslog_default_flush
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};
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#endif
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/* This is the current syslog channel in use */
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FAR const struct syslog_channel_s *g_syslog_channel = &g_default_channel;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: syslog_default_putc and syslog_default_flush
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*
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* Description:
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* Dummy, no-nothing channel interface methods
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*
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****************************************************************************/
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#ifdef NEED_LOWPUTC
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static int syslog_default_putc(int ch)
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{
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return ch;
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}
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#endif
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static int syslog_default_flush(void)
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{
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: syslog_channel
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*
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* Description:
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* Configure the SYSLOGging function to use the provided channel to
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* generate SYSLOG output.
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*
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* Input Parameters:
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* channel - Provides the interface to the channel to be used.
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*
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* Returned Value:
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* Zero (OK) is returned on success. A negated errno value is returned
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* on any failure.
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*
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****************************************************************************/
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int syslog_channel(FAR const struct syslog_channel_s *channel)
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{
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DEBUGASSERT(channel != NULL);
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if (channel != NULL)
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{
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DEBUGASSERT(channel->sc_putc != NULL && channel->sc_force != NULL &&
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channel->sc_flush != NULL);
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g_syslog_channel = channel;
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return OK;
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}
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return -EINVAL;
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}
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