Function dfs_file_isdir

components/dfs/dfs_v2/src/dfs_file.c:2358–2416

* @brief Check if a path refers to a directory * * This function checks whether the specified path exists and is a directory. * * @param[in] path The filesystem path to check * * @return int Operation result: * - 0 if path exists and is a directory * -RT_ERROR if path doesn't exist or isn't a directory */

 *         -RT_ERROR if path doesn't exist or isn't a directory
 */
int dfs_file_isdir(const char *path)
{
    int ret = -RT_ERROR;
    char *fullpath = RT_NULL;
    struct dfs_mnt *mnt = RT_NULL;
    struct dfs_dentry *dentry = RT_NULL;

    fullpath = dfs_normalize_path(NULL, path);
    if (fullpath)
    {
        DLOG(msg, "dfs_file", "mnt", DLOG_MSG, "dfs_mnt_lookup(%s)", fullpath);
        mnt = dfs_mnt_lookup(fullpath);
        if (mnt)
        {
            char *tmp = dfs_file_realpath(&mnt, fullpath, DFS_REALPATH_EXCEPT_NONE);
            if (tmp)
            {
                rt_free(fullpath);
                fullpath = tmp;
            }

            DLOG(msg, "dfs_file", "dentry", DLOG_MSG, "dentry = dfs_dentry_lookup(mnt, %s)", fullpath);
            dentry = dfs_dentry_lookup(mnt, fullpath, 0);
            if (dentry)
            {
                DLOG(msg, "dentry", "dfs_file", DLOG_MSG_RET, "return dentry");
                if (mnt->fs_ops->stat)
                {
                    struct stat stat = {0};
                    DLOG(msg, "dfs_file", mnt->fs_ops->name, DLOG_MSG, "fs_ops->stat(dentry, buf)");

                    if (dfs_is_mounted(mnt) == 0)
                    {
                        ret = mnt->fs_ops->stat(dentry, &stat);
                    }

                    if (ret == RT_EOK && S_ISDIR(stat.st_mode))
                    {
                        ret = RT_EOK;
                    }
                    else
                    {
                        ret = -RT_ERROR;
                    }
                }

                /* unref dentry */
                DLOG(msg, "dfs_file", "dentry", DLOG_MSG, "dfs_dentry_unref(dentry)");
                dfs_dentry_unref(dentry);
                dentry = RT_NULL;
            }
        }

        rt_free(fullpath);
        fullpath = RT_NULL;
    }

    return ret;