Function dfs_file_stat

components/dfs/dfs_v2/src/dfs_file.c:1249–1301

* @brief Get file status information * * @param[in] path The file path to get status for * @param[out] buf Pointer to stat structure to store the status information * * @return int Operation result: * - 0 on success * -ENOENT if file not found * -ENOMEM if memory allocation failed * Other negative error codes from filesystem operations */

 *         Other negative error codes from filesystem operations
 */
int dfs_file_stat(const char *path, struct stat *buf)
{
    int ret = -ENOENT;
    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)
                {
                    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, buf);
                    }
                }

                /* 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;
    }
    else
    {
        ret = -ENOMEM;
    }

    return ret;
}

/**
 * @brief Get file status information without following symbolic links