SYSLOG: Add an option to use the syslog'ing device as the system consolution. This option enables a low-level, write-only console device at /dev/console (similar to the low-level UART console device). From Pierre-noel Bouteville.

arch/arm/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include <arch/board/board.h>
 
@@ -220,6 +221,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/arm/src/efm32/efm32_config.h

@@ -127,73 +127,82 @@
 #undef HAVE_UART_CONSOLE
 #undef HAVE_LEUART_CONSOLE
 
-#if defined(CONFIG_USART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART0_ISUART)
+#if defined(CONFIG_SYSLOG_CONSOLE)
 #  undef CONFIG_USART1_SERIAL_CONSOLE
 #  undef CONFIG_USART2_SERIAL_CONSOLE
 #  undef CONFIG_UART0_SERIAL_CONSOLE
 #  undef CONFIG_UART1_SERIAL_CONSOLE
 #  undef CONFIG_LEUART0_SERIAL_CONSOLE
 #  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_UART_CONSOLE 1
-#elif defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART1_ISUART)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_UART_CONSOLE 1
-#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART2_ISUART)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_UART_CONSOLE 1
-#elif defined(CONFIG_UART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_UART0)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_UART_CONSOLE 1
-#elif defined(CONFIG_UART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_UART1)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_UART_CONSOLE 1
-#elif defined(CONFIG_LEUART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_LEUART0)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
-#  define HAVE_LEUART_CONSOLE 1
-#elif defined(CONFIG_LEUART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_LEUART1)
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  define HAVE_LEUART_CONSOLE 1
 #else
-#  ifdef CONFIG_DEV_CONSOLE
+#  if defined(CONFIG_USART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART0_ISUART)
-#    warning "No valid CONFIG_U[S]ART[n]_SERIAL_CONSOLE Setting"
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_UART_CONSOLE 1
+#  elif defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART1_ISUART)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_UART_CONSOLE 1
+#  elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_EFM32_USART2_ISUART)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_UART_CONSOLE 1
+#  elif defined(CONFIG_UART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_UART0)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_UART_CONSOLE 1
+#  elif defined(CONFIG_UART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_UART1)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_UART_CONSOLE 1
+#  elif defined(CONFIG_LEUART0_SERIAL_CONSOLE) && defined(CONFIG_EFM32_LEUART0)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
+#    define HAVE_LEUART_CONSOLE 1
+#  elif defined(CONFIG_LEUART1_SERIAL_CONSOLE) && defined(CONFIG_EFM32_LEUART1)
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    define HAVE_LEUART_CONSOLE 1
+#  else
+#    ifdef CONFIG_DEV_CONSOLE
+#      warning "No valid CONFIG_U[S]ART[n]_SERIAL_CONSOLE Setting"
+#    endif
+#    undef CONFIG_USART0_SERIAL_CONSOLE
+#    undef CONFIG_USART1_SERIAL_CONSOLE
+#    undef CONFIG_USART2_SERIAL_CONSOLE
+#    undef CONFIG_UART0_SERIAL_CONSOLE
+#    undef CONFIG_UART1_SERIAL_CONSOLE
+#    undef CONFIG_LEUART0_SERIAL_CONSOLE
+#    undef CONFIG_LEUART1_SERIAL_CONSOLE
 #  endif
-#  undef CONFIG_USART0_SERIAL_CONSOLE
-#  undef CONFIG_USART1_SERIAL_CONSOLE
-#  undef CONFIG_USART2_SERIAL_CONSOLE
-#  undef CONFIG_UART0_SERIAL_CONSOLE
-#  undef CONFIG_UART1_SERIAL_CONSOLE
-#  undef CONFIG_LEUART0_SERIAL_CONSOLE
-#  undef CONFIG_LEUART1_SERIAL_CONSOLE
 #endif
 
 /****************************************************************************

arch/avr/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include <arch/board/board.h>
 
@@ -246,6 +247,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/hc/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include "up_arch.h"
 #include "up_internal.h"
@@ -169,6 +170,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/mips/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include <arch/board/board.h>
 
@@ -171,6 +172,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/sh/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include "up_arch.h"
 #include "up_internal.h"
@@ -159,6 +160,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/sim/src/up_initialize.c

@@ -46,6 +46,7 @@
 #include <nuttx/fs/ioctl.h>
 #include <nuttx/mtd/mtd.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include "up_internal.h"
 
@@ -143,6 +144,8 @@ void up_initialize(void)
   /* Register a console (or not) */
 
   up_devconsole();          /* Our private /dev/console */
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/x86/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include <arch/board/board.h>
 
@@ -171,6 +172,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/z16/src/common/up_initialize.c

@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
 #include <nuttx/syslog/ramlog.h>
+#include <nuttx/syslog/syslog_console.h>
 
 #include <arch/board/board.h>
 
@@ -175,6 +176,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/z80/src/common/up_initialize.c

@@ -168,6 +168,8 @@ void up_initialize(void)
 
 #if defined(CONFIG_DEV_LOWCONSOLE)
   lowconsole_init();
+#elif defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
 #elif defined(CONFIG_RAMLOG_CONSOLE)
   ramlog_consoleinit();
 #endif

arch/z80/src/common/up_internal.h

@@ -88,6 +88,9 @@
 #  if defined(CONFIG_RAMLOG_CONSOLE)
 #    undef  USE_SERIALDRIVER
 #    undef  CONFIG_DEV_LOWCONSOLE
+#  elif defined(CONFIG_SYSLOG_CONSOLE)
+#    undef  USE_SERIALDRIVER
+#    undef  CONFIG_DEV_LOWCONSOLE
 #  elif defined(CONFIG_DEV_LOWCONSOLE)
 #    undef  USE_SERIALDRIVER
 #  else
@@ -168,6 +171,14 @@ void lowconsole_init(void);
 # define lowconsole_init()
 #endif
 
+/* Defined in drivers/syslog_console.c */
+
+#ifdef defined(CONFIG_SYSLOG_CONSOLE)
+  syslog_console_init();
+#else
+# define syslog_console_init()
+#endif
+
 /* Defined in drivers/ramlog.c */
 
 #ifdef CONFIG_RAMLOG_CONSOLE

drivers/syslog/Kconfig

@@ -71,3 +71,15 @@ config RAMLOG_NPOLLWAITERS
 		The maximum number of threads that may be waiting on the poll method.
 
 endif
+
+config SYSLOG_CONSOLE
+	bool "Use SYSLOG for /dev/console"
+	default n
+	depends on DEV_CONSOLE
+	---help---
+		Use the syslog logging device as a system console. If this feature is enabled 
+		(along with DEV_CONSOLE), then all console output will be re-directed to syslog
+		output (syslog_putc). This is useful, for example, if the only console is a Telnet
+		console.  Then in that case, console output from non-Telnet threads will go to
+		the syslog output.
+

drivers/syslog/Make.defs

@@ -47,6 +47,12 @@ ifeq ($(CONFIG_RAMLOG),y)
   CSRCS += ramlog.c
 endif
 
+# (Add other SYSLOG_CONSOLE drivers here)
+
+ifeq ($(CONFIG_SYSLOG_CONSOLE),y)
+  CSRCS += syslog_console.c
+endif
+
 # Include SYSLOG build support
 
 DEPPATH += --dep-path syslog

drivers/syslog/syslog_console.c

@@ -0,0 +1,139 @@
+/****************************************************************************
+ * drivers/syslog/syslog_console.c
+ *
+ *   Copyright (C) 2015 Pierre-noel Bouteville. All rights reserved.
+ *   Author: Pierre-noel Bouteville <pnb990@gmail.com>
+ *
+ * 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 <sys/types.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/fs/fs.h>
+#include <nuttx/syslog/syslog.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* The architecture must provide syslog_putc for this driver */
+
+#if defined(CONFIG_SYSLOG)
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static ssize_t syslog_console_read(FAR struct file *filep, FAR char *buffer, 
+                                   size_t buflen);
+static ssize_t syslog_console_write(FAR struct file *filep,
+                                    FAR const char *buffer, size_t buflen);
+static int     syslog_console_ioctl(FAR struct file *filep, int cmd, 
+                                    unsigned long arg);
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+static const struct file_operations g_consoleops =
+{
+  0,                    /* open */
+  0,                    /* close */
+  syslog_console_read,  /* read */
+  syslog_console_write, /* write */
+  0,                    /* seek */
+  syslog_console_ioctl  /* ioctl */
+#ifndef CONFIG_DISABLE_POLL
+  , 0                   /* poll */
+#endif
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslog_console_ioctl
+ ****************************************************************************/
+
+static int syslog_console_ioctl(FAR struct file *filep, int cmd,
+                                unsigned long arg)
+{
+  return -ENOTTY;
+}
+
+/****************************************************************************
+ * Name: syslog_console_read
+ ****************************************************************************/
+
+static ssize_t syslog_console_read(FAR struct file *filep, FAR char *buffer, 
+                                   size_t buflen)
+{
+  return 0;
+}
+
+/****************************************************************************
+ * Name: syslog_console_write
+ ****************************************************************************/
+
+static ssize_t syslog_console_write(FAR struct file *filep,
+                                    FAR const char *buffer, size_t buflen)
+{
+  ssize_t ret = buflen;
+
+  for (; buflen; buflen--)
+    {
+      syslog_putc(*buffer++);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslog_console_init
+****************************************************************************/
+
+void syslog_console_init(void)
+{
+  (void)register_driver("/dev/console", &g_consoleops, 0666, NULL);
+}
+#endif /* CONFIG_SYSLOG */

include/nuttx/syslog/syslog_console.h

@@ -0,0 +1,102 @@
+/****************************************************************************
+ * include/nuttx/syslog/ramlog.h
+ *
+ *   Copyright (C) 2015 Pierre-noel Bouteville. All rights reserved.
+ *   Author: Pierre-noel Bouteville <pnb990@gmail.com>
+ *
+ * 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 __INCLUDE_NUTTX_SYSLOG_SYSLOG_CONSOLE_H
+#define __INCLUDE_NUTTX_SYSLOG_SYSLOG_CONSOLE_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/syslog/syslog.h>
+
+#ifdef CONFIG_SYSLOG_CONSOLE
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+/* CONFIG_SYSLOG_CONSOLE - Use the syslog logging output as a system console.
+ *   If this feature is enabled (along with CONFIG_DEV_CONSOLE), then all
+ *   console output will be re-directed to a syslog_putc function.  This
+ *   is useful, for example, if the only console is a Telnet console.  Then
+ *   in that case, console output from non-Telnet threads will go to the
+ *   syslog_putc output.
+ *
+ */
+
+#ifndef CONFIG_DEV_CONSOLE
+#  undef CONFIG_SYSLOG_CONSOLE
+#endif
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslog_console_init
+ *
+ * Description:
+ *   Create the console logging device and register it at the '/dev/console' 
+ *   path.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SYSLOG_CONSOLE
+EXTERN int syslog_console_init(void);
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_SYSLOG_CONSOLE */
+#endif /* __INCLUDE_NUTTX_SYSLOG_SYSLOG_CONSOLE_H */