Function rpmsgfs_write

fs/rpmsgfs/rpmsgfs.c:526–573

 ****************************************************************************/

static ssize_t rpmsgfs_write(FAR struct file *filep, const char *buffer,
                             size_t buflen)
{
  FAR struct inode *inode;
  FAR struct rpmsgfs_mountpt_s *fs;
  FAR struct rpmsgfs_ofile_s *hf;
  ssize_t ret;

  DEBUGASSERT(filep->f_priv != NULL);

  /* Recover our private data from the struct file instance */

  hf    = filep->f_priv;
  inode = filep->f_inode;
  fs    = inode->i_private;

  DEBUGASSERT(fs != NULL);

  /* Take the lock */

  ret = nxmutex_lock(&fs->fs_lock);
  if (ret < 0)
    {
      return ret;
    }

  /* Test the permissions.  Only allow write if the file was opened with
   * write flags.
   */

  if ((hf->oflags & O_WROK) == 0)
    {
      ret = -EACCES;
      goto errout_with_lock;
    }

  /* Call the host to perform the write */

  ret = rpmsgfs_client_write(fs->handle, hf->fd, buffer, buflen);
  if (ret > 0)
    {
      filep->f_pos += ret;
    }

errout_with_lock:
  nxmutex_unlock(&fs->fs_lock);
  return ret;
}

/****************************************************************************
 * Name: rpmsgfs_seek