375 lines
12 KiB
C
375 lines
12 KiB
C
/****************************************************************************
|
|
* drivers/syslog/syslog.h
|
|
*
|
|
* Copyright (C) 2016-2017 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __DRIVERS_SYSLOG_SYSLOG_H
|
|
#define __DRIVERS_SYSLOG_SYSLOG_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdbool.h>
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
/* The default SYSLOG channel */
|
|
|
|
struct syslog_channel_s; /* Forward reference */
|
|
EXTERN const struct syslog_channel_s g_default_channel;
|
|
|
|
/* This is the current syslog channel in use. It initially points to
|
|
* g_default_channel.
|
|
*/
|
|
|
|
EXTERN FAR const struct syslog_channel_s *g_syslog_channel;
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_initialize
|
|
*
|
|
* Description:
|
|
* Initialize to use the character device (or file) at
|
|
* CONFIG_SYSLOG_DEVPATH as the SYSLOG sink.
|
|
*
|
|
* One power up, the SYSLOG facility is non-existent or limited to very
|
|
* low-level output. This function may be called later in the
|
|
* intialization sequence after full driver support has been initialized.
|
|
* (via syslog_initialize()) It installs the configured SYSLOG drivers
|
|
* and enables full SYSLOGing capability.
|
|
*
|
|
* NOTE that this implementation excludes using a network connection as
|
|
* SYSLOG device. That would be a good extension.
|
|
*
|
|
* Input Parameters:
|
|
* devpath - The full path to the character device to be used.
|
|
* oflags - File open flags
|
|
* mode - File open mode (only if oflags include O_CREAT)
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0
|
|
int syslog_dev_initialize(FAR const char *devpath, int oflags, int mode);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_uninitialize
|
|
*
|
|
* Description:
|
|
* Called to disable the last device/file channel in preparation to use
|
|
* a different SYSLOG device. Currently only used for CONFIG_SYSLOG_FILE.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* any failure.
|
|
*
|
|
* Assumptions:
|
|
* The caller has already switched the SYSLOG source to some safe channel
|
|
* (the default channel).
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SYSLOG_FILE)
|
|
int syslog_dev_uninitialize(void);
|
|
#endif /* CONFIG_SYSLOG_FILE */
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_channel
|
|
*
|
|
* Description:
|
|
* Configure to use the character device (or file) at
|
|
* CONFIG_SYSLOG_DEVPATH as the SYSLOG channel.
|
|
*
|
|
* This tiny function is simply a wrapper around syslog_dev_initialize()
|
|
* and syslog_channel(). It calls syslog_dev_initialize() to configure
|
|
* the character device at CONFIG_SYSLOG_DEVPATH then calls
|
|
* syslog_channel() to use that device as the SYSLOG output channel.
|
|
*
|
|
* NOTE interrupt level SYSLOG output will be lost in this case unless
|
|
* the interrupt buffer is used.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SYSLOG_CHAR
|
|
int syslog_dev_channel(void);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_console_channel
|
|
*
|
|
* Description:
|
|
* Configure to use the character device (or file) at /dev/console as the
|
|
* SYSLOG channel.
|
|
*
|
|
* This tiny function is simply a wrapper around syslog_dev_initialize()
|
|
* and syslog_channel(). It calls syslog_dev_initialize() to configure
|
|
* the character device at /dev/console then calls syslog_channel() to
|
|
* use that device as the SYSLOG output channel.
|
|
*
|
|
* NOTE interrupt level SYSLOG output will be lost in the general case
|
|
* unless the interrupt buffer is used. As a special case: If the serial
|
|
* console is used and the architecture provides up_putc(), the interrupt
|
|
* level output will be directed to up_putc() is the interrupt buffer is
|
|
* disabled.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SYSLOG_CONSOLE
|
|
int syslog_console_channel(void);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_register
|
|
*
|
|
* Description:
|
|
* Register a simple character driver at /dev/syslog whose write() method
|
|
* will transfer data to the SYSLOG device. This can be useful if, for
|
|
* example, you want to redirect the output of a program to the SYSLOG.
|
|
*
|
|
* NOTE that unlike other syslog output, this data is unformatted raw
|
|
* byte output with no time-stamping or any other SYSLOG features
|
|
* supported.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SYSLOG_CHARDEV
|
|
void syslog_register(void);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_add_intbuffer
|
|
*
|
|
* Description:
|
|
* Add one more character to the interrupt buffer. In the event of
|
|
* buffer overlowed, the character will be dropped. The indication
|
|
* "[truncated]\n" will be appended to the end of the interrupt buffer.
|
|
*
|
|
* Input Parameters:
|
|
* ch - The character to add to the interrupt buffer (must be positive).
|
|
*
|
|
* Returned Value:
|
|
* Zero success, the character is echoed back to the caller. A negated
|
|
* errno value is returned on any failure.
|
|
*
|
|
* Assumptions:
|
|
* Called only from interrupt handling logic; Interrupts will be disabled.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SYSLOG_INTBUFFER
|
|
int syslog_add_intbuffer(int ch);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_flush_intbuffer
|
|
*
|
|
* Description:
|
|
* Flush any characters that may have been added to the interrupt buffer
|
|
* to the SYSLOG device.
|
|
*
|
|
* Input Parameters:
|
|
* channel - The syslog channel to use in performing the flush operation.
|
|
* force - Use the force() method of the channel vs. the putc() method.
|
|
*
|
|
* Returned Value:
|
|
* On success, the character is echoed back to the caller. A negated
|
|
* errno value is returned on any failure.
|
|
*
|
|
* Assumptions:
|
|
* Interrupts may or may not be disabled.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SYSLOG_INTBUFFER
|
|
int syslog_flush_intbuffer(FAR const struct syslog_channel_s *channel,
|
|
bool force);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_putc
|
|
*
|
|
* Description:
|
|
* This is the low-level, single character, system logging interface.
|
|
*
|
|
* Input Parameters:
|
|
* ch - The character to add to the SYSLOG (must be positive).
|
|
*
|
|
* Returned Value:
|
|
* On success, the character is echoed back to the caller. Minus one
|
|
* is returned on any failure with the errno set correctly.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int syslog_putc(int ch);
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_write
|
|
*
|
|
* Description:
|
|
* This is the low-level, multiple character, system logging interface.
|
|
*
|
|
* Input Parameters:
|
|
* buffer - The buffer containing the data to be output
|
|
* buflen - The number of bytes in the buffer
|
|
*
|
|
* Returned Value:
|
|
* On success, the number of characters written is returned. A negated
|
|
* errno value is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t syslog_write(FAR const char *buffer, size_t buflen);
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_force
|
|
*
|
|
* Description:
|
|
* This is the low-level system logging interface. This version forces
|
|
* the output and is only used in emergency situations (e.g., in assertion
|
|
* handling).
|
|
*
|
|
* Input Parameters:
|
|
* ch - The character to add to the SYSLOG (must be positive).
|
|
*
|
|
* Returned Value:
|
|
* On success, the character is echoed back to the caller. A negated errno
|
|
* value is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int syslog_force(int ch);
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_write
|
|
*
|
|
* Description:
|
|
* This is the low-level, multile byte, system logging interface provided
|
|
* for the character driver interface.
|
|
*
|
|
* Input Parameters:
|
|
* buffer - The buffer containing the data to be output
|
|
* buflen - The number of bytes in the buffer
|
|
*
|
|
* Returned Value:
|
|
* On success, the character is echoed back to the caller. A negated errno
|
|
* value is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t syslog_dev_write(FAR const char *buffer, size_t buflen);
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_putc
|
|
*
|
|
* Description:
|
|
* This is the low-level system logging interface provided for the
|
|
* character driver interface.
|
|
*
|
|
* Input Parameters:
|
|
* ch - The character to add to the SYSLOG (must be positive).
|
|
*
|
|
* Returned Value:
|
|
* On success, the character is echoed back to the caller. A negated
|
|
* errno value is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0
|
|
int syslog_dev_putc(int ch);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: syslog_dev_flush
|
|
*
|
|
* Description:
|
|
* Flush any buffer data in the file system to media.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno value is returned on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0
|
|
int syslog_dev_flush(void);
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __DRIVERS_SYSLOG_SYSLOG_H */
|