Add logic to re-direct debug output to a sysloggin device

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4381 7fd9a85b-ad96-42d3-883c-3090e2eb8679

nuttx/lib/stdio/Make.defs

@@ -52,6 +52,10 @@ STDIO_SRCS += lib_fopen.c lib_fclose.c lib_fread.c lib_libfread.c lib_fseek.c \
 endif
 endif
 
+ifdef ($(CONFIG_SYSLOG)
+STDIO_SRCS += lib_syslogstream.c
+endif
+
 ifeq ($(CONFIG_LIBC_FLOATINGPOINT),y)
 STDIO_SRCS += lib_dtoa.c
 endif

nuttx/lib/stdio/lib_lowprintf.c

@@ -1,8 +1,8 @@
 /****************************************************************************
  * lib/stdio/lib_lowprintf.c
  *
- *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *   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
@@ -82,17 +82,19 @@
  * Name: lib_lowvprintf
  ****************************************************************************/
 
-#ifdef CONFIG_ARCH_LOWPUTC
+#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_SYSLOG)
 
 int lib_lowvprintf(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.
-   */
+  /* Wrap the stdout in a stream object and let lib_vsprintf do the work. */
 
+#if defined(CONFIG_RAMLOG_CONSOLE) || defined(CONFIG_RAMLOG_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);
 }
 
@@ -111,4 +113,4 @@ int lib_lowprintf(const char *fmt, ...)
   return ret;
 }
 
-#endif /* CONFIG_ARCH_LOWPUTC */
+#endif /* CONFIG_ARCH_LOWPUTC || CONFIG_SYSLOG*/

nuttx/lib/stdio/lib_rawprintf.c

@@ -1,8 +1,8 @@
 /****************************************************************************
  * lib/stdio/lib_rawprintf.c
  *
- *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *   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
@@ -83,7 +83,18 @@
 
 int lib_rawvprintf(const char *fmt, va_list ap)
 {
-#if CONFIG_NFILE_DESCRIPTORS > 0
+#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;
 

nuttx/lib/stdio/lib_syslogstream.c

@@ -0,0 +1,103 @@
+/****************************************************************************
+ * lib/stdio/lib_syslogstream.c
+ *
+ *   Copyright (C) 2023 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <errno.h>
+
+#include <nuttx/ramlog.h>
+
+#include "lib_internal.h"
+
+#ifdef CONFIG_SYSLOG
+
+/****************************************************************************
+ * Pre-processor definition
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: syslogstream_putc
+ ****************************************************************************/
+
+static void syslogstream_putc(FAR struct lib_outstream_s *this, int ch)
+{
+  /* At present, the RAM log is the only supported logging device */
+
+#ifdef CONFIG_RAMLOG_SYSLOG
+  (void)ramlog_putc(ch);
+  this->nput++;
+#endif
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_sylogstream
+ *
+ * Description:
+ *   Initializes a stream for use with the coinfigured 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_sylogstream(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 */
+
+