yes.  in p9p, srv initiates auth and expects factotum to negotiate it.  i
use this (it is from a man page and/or wiki page; i forget):

#!/bin/bash

factotum -n
srv -a bootes bootes
sudo mount -t 9p -o trans=unix,uname=$USER,dfltuid=`id -u`,dfltgid=`id -g`
`namespace`/bootes /mnt/bootes


On Mon, Jun 5, 2017 at 10:10 PM James A. Robinson <jim.robinson@gmail.com>
wrote:

> If I want to be able to use v9fs to mount a plan9 fileserver as a specific
> user, do I need to provide credentials via plan9port factotum?
>
> Drawterm takes an argument about which authentication server to talk to,
> but the directions I see for v9fs seem to only talk about USER environment
> variables, or mounting a factotum interface.
>
>