Function dfs_file_unlink

components/dfs/dfs_v1/src/dfs_file.c:484–528

* this function will unlink (remove) a specified path file from file system. * * @param path the specified path file to be unlinked. * * @return 0 on successful, -1 on failed. */

 * @return 0 on successful, -1 on failed.
 */
int dfs_file_unlink(const char *path)
{
    int result;
    char *fullpath;
    struct dfs_filesystem *fs;

    /* Make sure we have an absolute path */
    fullpath = dfs_normalize_path(NULL, path);
    if (fullpath == NULL)
    {
        return -EINVAL;
    }

    /* Check whether file is already open */
    if (dfs_file_is_open(fullpath))
    {
        result = -EBUSY;
        goto __exit;
    }

    /* get filesystem */
    if ((fs = dfs_filesystem_lookup(fullpath)) == NULL)
    {
        result = -ENOENT;
        goto __exit;
    }

    if (fs->ops->unlink != NULL)
    {
        if (!(fs->ops->flags & DFS_FS_FLAG_FULLPATH))
        {
            if (dfs_subdir(fs->path, fullpath) == NULL)
                result = fs->ops->unlink(fs, "/");
            else
                result = fs->ops->unlink(fs, dfs_subdir(fs->path, fullpath));
        }
        else
            result = fs->ops->unlink(fs, fullpath);
    }
    else result = -ENOSYS;

__exit:
    rt_free(fullpath);
    return result;
}

/**
 * this function will write some specified length data to file system.