1 files changed, 91 insertions, 0 deletions
diff --git a/nuttx/examples/ostest/dev_null.c b/nuttx/examples/ostest/dev_null.c
new file mode 100644
index 0000000000..11d6056c84
--- /dev/null
+++ b/nuttx/examples/ostest/dev_null.c
@@ -0,0 +1,91 @@
+/************************************************************
+ * dev_null.c
+ *
+ *   Copyright (C) 2007 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 Gregory Nutt 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.
+ *
+ ************************************************************/
+
+/************************************************************
+ * Compilation Switches
+ ************************************************************/
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <nuttx/config.h>
+#include <stdio.h>
+#include <nuttx/os_external.h>
+#include "ostest.h"
+
+/************************************************************
+ * Private Data
+ ************************************************************/
+
+static char buffer[1024];
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+int dev_null(void)
+{
+  int nbytes;
+  int fd;
+
+  fd = open("/dev/null", O_RDWR);
+  if (fd < 0)
+    {
+      fprintf(stderr, "%s: Failed to open /dev/null\n", __FUNCTION__);
+      return -1;
+    }
+
+  nbytes = read(fd, buffer, 1024);
+  if (nbytes < 0)
+    {
+      fprintf(stderr, "%s: Failed to read from /dev/null\n", __FUNCTION__);
+      close(fd);
+      return -1;
+    }
+  printf("%s: Read %d bytes from /dev/null\n", __FUNCTION__, nbytes);
+
+  nbytes = write(fd, buffer, 1024);
+  if (nbytes < 0)
+    {
+      fprintf(stderr, "%s: Failed to write to /dev/null\n", __FUNCTION__);
+      close(fd);
+      return -1;
+    }
+  printf("%s: Wrote %d bytes to /dev/null\n", __FUNCTION__, nbytes);
+
+  close(fd);
+  return 0;
+}