From: Stuart Henderson <stu@spacehopper.org>
Subject: Re: sysupgrade vs NFS
To: tech@openbsd.org
Date: Thu, 12 Jun 2025 13:21:22 +0100

On 2025/06/10 18:56, Marc Espie wrote:
> I triend to use sysupgrade on a cluster where /home is mounted over NFS.
> It didn't work. I think it might be possible to write a hints file to
> make it work, but it is brittle.
> 
> In the mean time, the following patch appears to stop it right in its
> track before wasting time downloading files to NFS.

Those downloads can be pretty slow sometimes so that's not a bad idea.

> Index: sysupgrade.sh
> ===================================================================
> RCS file: /build/data/openbsd/cvs/src/usr.sbin/sysupgrade/sysupgrade.sh,v
> diff -u -p -r1.52 sysupgrade.sh
> --- sysupgrade.sh	19 Jun 2024 05:22:33 -0000	1.52
> +++ sysupgrade.sh	10 Jun 2025 16:54:11 -0000
> @@ -132,6 +132,11 @@ fi
>  
>  install -d -o 0 -g 0 -m 0755 ${SETSDIR}
>  cd ${SETSDIR}
> +case `df ${SETSDIR}` in

Would be nice to avoid creating the dir too, but then it's harder to
reliably check the fs type.

> +*:*) 
> +	echo "Error: ${SETSDIR} on NFS is currently not supported"

That also catches MFS. Not a bad thing but then the error message is
wrong.

> +	exit 1;;
> +esac
>  
>  echo "Fetching from ${URL}"
>  unpriv -f SHA256.sig ftp -N sysupgrade -Vmo SHA256.sig ${URL}SHA256.sig
>