Function sys_chmod

components/lwp/lwp_syscall.c:10332–10361

* @brief Change file permissions. * * This function changes the permissions of a file or directory specified by the `pathname`. * The new permissions are specified using the `mode` argument, which is a bitwise OR of permission bits. * The permissions apply to the file owner, group, and others, depending on the value of `mode`. * * @param[in] pathname The path to the file or directory whose

 *       not the target file or directory.
 */
sysret_t sys_chmod(const char *pathname, mode_t mode)
{
    char *copy_file;
    size_t len_file, copy_len_file;
    struct dfs_attr attr = {0};
    int ret = 0;

    len_file = lwp_user_strlen(pathname);
    if (len_file <= 0)
    {
        return -EFAULT;
    }

    copy_file = (char*)rt_malloc(len_file + 1);
    if (!copy_file)
    {
        return -ENOMEM;
    }

    copy_len_file = lwp_get_from_user(copy_file, (void *)pathname, len_file);

    attr.st_mode = mode;
    attr.ia_valid |= ATTR_MODE_SET;

    copy_file[copy_len_file] = '\0';
    ret = dfs_file_setattr(copy_file, &attr);
    rt_free(copy_file);

    return (ret < 0 ? GET_ERRNO() : ret);
}

/**
 * @brief Change the ownership of a file or directory.