1 files changed, 147 insertions, 0 deletions
diff --git a/nuttx/fs/nxffs/nxffs_write.c b/nuttx/fs/nxffs/nxffs_write.c
new file mode 100644
index 0000000000..363a1d60fd
--- /dev/null
+++ b/nuttx/fs/nxffs/nxffs_write.c
@@ -0,0 +1,147 @@
+/****************************************************************************
+ * fs/nxffs/nxffs_write.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * References: Linux/Documentation/filesystems/romfs.txt
+ *
+ * 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 <string.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/fs.h>
+#include <nuttx/mtd.h>
+
+#include "nxffs.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxffs_write
+ *
+ * Description:
+ *   This is an implementation of the NuttX standard file system write
+ *   method.
+ *
+ ****************************************************************************/
+
+ssize_t nxffs_write(FAR struct file *filep, FAR const char *buffer, size_t buflen)
+{
+  FAR struct nxffs_volume_s *volume;
+  FAR struct nxffs_wrfile_s *wrfile;
+  ssize_t ret;
+
+  fvdbg("Write %d bytes to offset %d\n", buflen, filep->f_pos);
+
+  /* Sanity checks */
+
+  DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
+
+  /* Recover the open file state from the struct file instance */
+
+  wrfile = (FAR struct nxffs_wrfile_s *)filep->f_priv;
+
+  /* Recover the volume state from the open file */
+
+  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  DEBUGASSERT(volume != NULL);
+
+  /* Get exclusive access to the volume.  Note that the volume exclsem
+   * protects the open file list.
+   */
+
+  ret = sem_wait(&volume->exclsem);
+  if (ret != OK)
+    {
+      ret = -errno;
+      fdbg("sem_wait failed: %d\n", ret);
+      goto errout;
+    }
+
+  /* Check if the file was opened with write access */
+
+#ifdef CONFIG_DEBUG
+  if ((wrfile->ofile.mode & O_WROK) == 0)
+    {
+      fdbg("File not open for write access\n");
+      ret = -EACCES;
+      goto errout_with_semaphore;
+    }
+#endif
+
+  /* Seek to the current file offset */
+
+  nxffs_ioseek(volume, wrfile->dathdr + wrfile->wrlen);
+
+  /* Write data to that file offset */
+
+  ret = nxffs_wrdata(volume, (FAR const uint8_t*)buffer, buflen);
+  if (ret > 0)
+    {
+      /* Update the file offset */
+
+      filep->f_pos += ret;
+    }
+#warning "Add check for block full"
+
+errout_with_semaphore:
+  sem_post(&volume->exclsem);
+errout:
+  return ret;
+}