1 files changed, 116 insertions, 0 deletions
diff --git a/nuttx/lib/stdio/lib_wrflush.c b/nuttx/lib/stdio/lib_wrflush.c
new file mode 100644
index 000000000..c16109515
--- /dev/null
+++ b/nuttx/lib/stdio/lib_wrflush.c
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * lib/stdio/lib_wrflush.c
+ *
+ *   Copyright (C) 2008-2009, 2011 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 <stdbool.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "lib_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_wrflush
+ *
+ * Description:
+ *   This is simply a version of fflush that does not report an error if
+ *   the file is not open for writing.
+ *
+ ****************************************************************************/
+
+int lib_wrflush(FAR FILE *stream)
+{
+  /* Verify that we were passed a valid (i.e., non-NULL) stream */
+
+#if CONFIG_STDIO_BUFFER_SIZE > 0
+  if (stream)
+    {
+      /* Verify that the stream is opened for writing... lib_fflush will
+       * return an error if it is called for a stream that is not opened for
+       * writing.
+       */
+
+      if ((stream->fs_oflags & O_WROK) == 0 ||
+          lib_fflush(stream, true) == 0)
+       {
+         /* Return success if there is no buffered write data -- i.e., that
+          * the stream is not opened for writing or, if it is, that all of
+          * the buffered write data was successfully flushed.
+          */
+
+         return OK;
+       }
+    }
+  return ERROR;
+#else
+  return stream ? OK : ERROR;
+#endif
+}