Function dfs_fdtable_drop_fd

components/dfs/dfs_v2/src/dfs.c:634–657

* @brief drop fd from the fd table. * * @param fdt is the fd table, if empty, use global (_fdtab). * * @param fd is the fd in the designate fd table. * * @return -1 on failed the drop file descriptor. */

 * @return -1 on failed the drop file descriptor.
 */
int dfs_fdtable_drop_fd(struct dfs_fdtable *fdt, int fd)
{
    int err = 0;

    if (fdt == NULL)
    {
        fdt = &_fdtab;
    }

    if (dfs_file_lock() != RT_EOK)
    {
        return -RT_ENOSYS;
    }

    err = dfs_file_close(fdt->fds[fd]);
    if (!err)
    {
        fdt_fd_release(fdt, fd);
    }

    dfs_file_unlock();

    return err;
}

/**
 * @brief Duplicate a file descriptor in the current process's file descriptor table