Re: sshfs permission problem

On Fri, Aug 10, 2018 at 10:38:52AM +0200, Hiltjo Posthuma wrote:
> On Fri, Aug 03, 2018 at 01:44:39PM +0200, Rudolf Sykora wrote:
> > Hello!
> >
> > I run
> >
> > doas sshfs sykora@pc109.fzu.cz: /home/ruda/mnt/fzu -o uid=1000 -o gid=1000
> >
> > But then the mount point is owned (after the mounting) by root:
> >
> > drwx------ 1 root wheel 512 Aug 3 13:22 fzu
> >
> > Hence I cannot enter the directory as the usual (and wanted) user 'ruda'.
> >
> > 1) doas chmod 777 fzu does not help (does nothing)
> > 2) doas chown ruda:ruda fzu gives permission denied
> >
> > What can I do?
> >
> > Thanks
> > Ruda
> >
>
> Hi,
>
> I have the same issue here.
>
> chmod 777 changes the permisions, but seems to reset them automatically after a
> second or so.
>
> The umask 0000 suggestion doesn't work either unfortunately.
>
> On 6.3 this problem doesn't occur, but on -current it does. I'll try to bisect
> it later.
>
> --
> Kind regards,
> Hiltjo
>

I figured it out and it doesn't seem like a bug, just a changed behaviour. The
following commit changed it:

CVS revision 1.47:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libfuse/fuse.c?rev=1.47&content-type=text/x-cvsweb-markup

or git commit:

commit 0f4d2db5a50672bad418a08041219503c0deeced
Author: helg <helg@openbsd.org>
Date: Tue Jun 19 13:01:34 2018 +0000

Changes the default mount behaviour so only the user that mounts the
file system can access it unless the allow_other mount options is
specified. The allow_other mount option makes the file system
available to other users just like any other mounted file system.

ok mpi@


So the solution is to use the option: -o allow_other, for example:
sshfs -o allow_other user@host:dir /mnt/mount

I hope this helps someone.

--
Kind regards,
Hiltjo