Move syslog logic from libc/misc and libc/stdio to libc/syslog

6 files changed, 612 insertions, 0 deletions

diff --git a/nuttx/libc/syslog/Make.defs b/nuttx/libc/syslog/Make.defs
new file mode 100644
index 000000000..fe6e620ed
--- /dev/null
+++ b/nuttx/libc/syslog/Make.defs
@@ -0,0 +1,51 @@
+############################################################################
+# libc/syslog/Make.defs
+#
+#   Copyright (C) 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.
+#
+############################################################################
+
+# Add the internal C files to the build
+
+CSRCS += lib_syslog.c lib_lowsyslog.c
+
+ifeq ($(CONFIG_SYSLOG),y)
+CSRCS += lib_syslogstream.c
+endif
+
+ifeq ($(CONFIG_SYSLOG_ENABLE),y)
+CSRCS += lib_syslogenable.c
+endif
+
+# Add the syslog directory to the build
+
+DEPPATH += --dep-path syslog
+VPATH += :syslog
diff --git a/nuttx/libc/syslog/lib_lowsyslog.c b/nuttx/libc/syslog/lib_lowsyslog.c
new file mode 100644
index 000000000..f7287c517
--- /dev/null
+++ b/nuttx/libc/syslog/lib_lowsyslog.c
@@ -0,0 +1,130 @@
+/****************************************************************************
+ * libc/syslog/lib_lowsyslog.c
+ *
+ *   Copyright (C) 2007-2009, 2011-2012 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 <debug.h>
+
+#include "lib_internal.h"
+
+/* This interface can only be used from within the kernel */
+
+#if !defined(CONFIG_BUILD_PROTECTED) || defined(__KERNEL__)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lowvsyslog
+ ****************************************************************************/
+
+#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_SYSLOG)
+
+int lowvsyslog(int priority, FAR const char *fmt, va_list ap)
+{
+  struct lib_outstream_s stream;
+
+  /* Wrap the stdout in a stream object and let lib_vsprintf do the work. */
+
+#ifdef CONFIG_SYSLOG
+  lib_syslogstream((FAR struct lib_outstream_s *)&stream);
+#else
+  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
+#endif
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+}
+
+/****************************************************************************
+ * Name: lowsyslog
+ ****************************************************************************/
+
+int lowsyslog(int priority, FAR const char *fmt, ...)
+{
+  va_list ap;
+  int     ret;
+
+#ifdef CONFIG_SYSLOG_ENABLE
+  ret = 0;
+  if (g_syslogenable)
+#endif
+    {
+      va_start(ap, fmt);
+      ret = lowvsyslog(priority, fmt, ap);
+      va_end(ap);
+    }
+
+  return ret;
+}
+
+#endif /* CONFIG_ARCH_LOWPUTC || CONFIG_SYSLOG */
+#endif /* __KERNEL__ */
diff --git a/nuttx/libc/syslog/lib_syslog.c b/nuttx/libc/syslog/lib_syslog.c
new file mode 100644
index 000000000..21993ecc4
--- /dev/null
+++ b/nuttx/libc/syslog/lib_syslog.c
@@ -0,0 +1,155 @@
+/****************************************************************************
+ * 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 "lib_internal.h"
+#include "syslog/syslog.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Some output destinations are only available from within the kernel */
+
+#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
+#  undef CONFIG_SYSLOG
+#  undef CONFIG_ARCH_LOWPUTC
+#endif
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: vsyslog
+ ****************************************************************************/
+
+int vsyslog(int priority, FAR const char *fmt, va_list ap)
+{
+#if defined(CONFIG_SYSLOG)
+
+  struct lib_outstream_s stream;
+
+  /* Wrap the low-level output in a stream object and let lib_vsprintf
+   * do the work.
+   */
+
+  lib_syslogstream((FAR struct lib_outstream_s *)&stream);
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+
+#elif CONFIG_NFILE_DESCRIPTORS > 0
+
+  struct lib_rawoutstream_s rawoutstream;
+
+  /* Wrap the stdout in a stream object and let lib_vsprintf
+   * do the work.
+   */
+
+  lib_rawoutstream(&rawoutstream, 1);
+  return lib_vsprintf(&rawoutstream.public, fmt, ap);
+
+#elif defined(CONFIG_ARCH_LOWPUTC)
+
+  struct lib_outstream_s stream;
+
+  /* Wrap the low-level output in a stream object and let lib_vsprintf
+   * do the work.
+   */
+
+  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+
+#else
+  return 0;
+#endif
+}
+
+/****************************************************************************
+ * Name: syslog
+ ****************************************************************************/
+
+int syslog(int priority, FAR const char *fmt, ...)
+{
+  va_list ap;
+  int     ret;
+
+#ifdef CONFIG_SYSLOG_ENABLE
+  ret = 0;
+  if (g_syslogenable)
+#endif
+    {
+      va_start(ap, fmt);
+      ret = vsyslog(priority, fmt, ap);
+      va_end(ap);
+    }
+
+  return ret;
+}
diff --git a/nuttx/libc/syslog/lib_syslogenable.c b/nuttx/libc/syslog/lib_syslogenable.c
new file mode 100644
index 000000000..adba5b708
--- /dev/null
+++ b/nuttx/libc/syslog/lib_syslogenable.c
@@ -0,0 +1,73 @@
+/****************************************************************************
+ * libc/syslog/lib_syslogenable.c
+ *
+ *   Copyright (C) 2007-2009, 2011-2012 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 <stdbool.h>
+
+#include "lib_internal.h"
+
+#ifdef CONFIG_SYSLOG_ENABLE
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Debug output is initially disabled */
+
+bool g_syslogenable;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslog_enable
+ *
+ * Description:
+ *  Enable or disable debug output.
+ *
+ ****************************************************************************/
+
+void syslog_enable(bool enable)
+{
+  g_syslogenable = enable;
+}
+
+#endif /* CONFIG_SYSLOG_ENABLE */
diff --git a/nuttx/libc/syslog/lib_syslogstream.c b/nuttx/libc/syslog/lib_syslogstream.c
new file mode 100644
index 000000000..7d485e74c
--- /dev/null
+++ b/nuttx/libc/syslog/lib_syslogstream.c
@@ -0,0 +1,122 @@
+/****************************************************************************
+ * libc/syslog/lib_syslogstream.c
+ *
+ *   Copyright (C) 2012 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 <unistd.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <nuttx/syslog/syslog.h>
+
+#include "lib_internal.h"
+#include "syslog/syslog.h"
+
+#ifdef CONFIG_SYSLOG
+
+/****************************************************************************
+ * Pre-processor definition
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslogstream_putc
+ ****************************************************************************/
+
+static void syslogstream_putc(FAR struct lib_outstream_s *this, int ch)
+{
+  int ret;
+
+  /* Try writing until the write was successful or until an irrecoverable
+   * error occurs.
+   */
+
+  do
+    {
+      /* Write the character to the supported logging device.  On failure,
+       * syslog_putc returns EOF with the errno value set;
+       */
+
+      ret = syslog_putc(ch);
+      if (ret != EOF)
+        {
+          this->nput++;
+          return;
+        }
+
+      /* The special errno value -EINTR means that syslog_putc() was
+       * awakened by a signal.  This is not a real error and must be
+       * ignored in this context.
+       */
+    }
+  while (errno == -EINTR);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_syslogstream
+ *
+ * Description:
+ *   Initializes a stream for use with the configured syslog interface.
+ *
+ * Input parameters:
+ *   lowoutstream - User allocated, uninitialized instance of struct
+ *                  lib_lowoutstream_s to be initialized.
+ *
+ * Returned Value:
+ *   None (User allocated instance initialized).
+ *
+ ****************************************************************************/
+
+void lib_syslogstream(FAR struct lib_outstream_s *stream)
+{
+  stream->put   = syslogstream_putc;
+#ifdef CONFIG_STDIO_LINEBUFFER
+  stream->flush = lib_noflush;
+#endif
+  stream->nput  = 0;
+}
+
+#endif /* CONFIG_SYSLOG */
diff --git a/nuttx/libc/syslog/syslog.h b/nuttx/libc/syslog/syslog.h
new file mode 100644
index 000000000..6f9cb5ffa
--- /dev/null
+++ b/nuttx/libc/syslog/syslog.h
@@ -0,0 +1,81 @@
+/****************************************************************************
+ * libc/syslog/syslog.h
+ *
+ *   Copyright (C) 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.
+ *
+ ****************************************************************************/
+
+#ifndef __LIBC_SYSLOG_SYSLOG_H
+#define __LIBC_SYSLOG_SYSLOG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/* Debug output is initially disabled */
+
+#ifdef CONFIG_SYSLOG_ENABLE
+EXTERN bool g_syslogenable;
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __LIBC_SYSLOG_SYSLOG_H */