Function opendir

components/dfs/dfs_v2/src/dfs_posix.c:928–975

* this function is a POSIX compliant version, which will open a directory. * * @param name the path name to be open. * * @return the DIR pointer of directory, NULL on open directory failed. */

 * @return the DIR pointer of directory, NULL on open directory failed.
 */
DIR *opendir(const char *name)
{
    DIR *t = RT_NULL;
    int fd, result;
    struct dfs_file *file = RT_NULL;

    if (!name || dfs_file_isdir(name) != 0)
    {
        rt_set_errno(-RT_ERROR);
        return RT_NULL;
    }

    fd = fd_new();
    if (fd >= 0)
    {
        file = fd_get(fd);
    }
    else
    {
        rt_set_errno(-RT_ERROR);
        return RT_NULL;
    }

    result = dfs_file_open(file, name, O_RDONLY | O_DIRECTORY, 0);
    if (result >= 0)
    {
        /* open successfully */
        t = (DIR *) rt_malloc(sizeof(DIR));
        if (t == NULL)
        {
            dfs_file_close(file);
            fd_release(fd);
        }
        else
        {
            rt_memset(t, 0, sizeof(DIR));

            t->fd = fd;
        }

        return t;
    }

    fd_release(fd);
    rt_set_errno(result);

    return NULL;
}
RTM_EXPORT(opendir);

/**