Function dfs_file_write

components/dfs/dfs_v1/src/dfs_file.c:539–552

* this function will write some specified length data to file system. * * @param fd the file descriptor. * @param buf the data buffer to be written. * @param len the data buffer length * * @return the actual written data length. */

 * @return the actual written data length.
 */
ssize_t dfs_file_write(struct dfs_file *fd, const void *buf, size_t len)
{
    if (fd == NULL)
    {
        return -EINVAL;
    }

    if (fd->vnode->fops->write == NULL)
    {
        return -ENOSYS;
    }

    return fd->vnode->fops->write(fd, buf, len);
}

/**
 * this function will flush buffer on a file descriptor.