Function rpmsgfs_open

fs/rpmsgfs/rpmsgfs.c:279–387

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

static int rpmsgfs_open(FAR struct file *filep, FAR const char *relpath,
                        int oflags, mode_t mode)
{
  FAR struct inode *inode;
  FAR struct rpmsgfs_mountpt_s *fs;
  FAR struct rpmsgfs_ofile_s  *hf;
  FAR char *path;
  int ret;

  /* Sanity checks */

  DEBUGASSERT((filep->f_priv == NULL) && (filep->f_inode != NULL));

  /* Get the mountpoint inode reference from the file structure and the
   * mountpoint private data from the inode structure
   */

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

  DEBUGASSERT(fs != NULL);

  path = lib_get_pathbuffer();
  if (path == NULL)
    {
      return -ENOMEM;
    }

  /* Take the lock */

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

  /* Allocate memory for the open file */

  hf = fs_heap_malloc(sizeof *hf);
  if (hf == NULL)
    {
      ret = -ENOMEM;
      goto errout_with_lock;
    }

  /* Append to the host's root directory */

  rpmsgfs_mkpath(fs, relpath, path, PATH_MAX);

  /* Try to open the file in the host file system */

  hf->fd = rpmsgfs_client_open(fs->handle, path, oflags, mode);
  if (hf->fd < 0)
    {
      /* Error opening file */

      ret = hf->fd;