net/local: support FIONWRITE for domain socket ioctl
@@ -829,6 +829,7 @@ static int local_ioctl(FAR struct socket *psock, int cmd, unsigned long arg)
ret = -ENOTCONN;
}
break;
+ case FIONWRITE:
case FIONSPACE:
if (conn->lc_outfile.f_inode != NULL)
{
