On Fri, Nov 28, 2014 at 10:55:56AM +0100, Jan Kiszka wrote:
> On 2014-11-28 10:50, Gilles Chanteperdrix wrote:
> > On Fri, Nov 28, 2014 at 10:40:27AM +0100, Jan Kiszka wrote:
> >> On 2014-11-28 00:15, Gilles Chanteperdrix wrote:
> >>> On Thu, Nov 27, 2014 at 09:43:34PM +0100, Jan Kiszka wrote:
> >>>> On 2014-11-27 21:34, Gilles Chanteperdrix wrote:
> >>>>> On Thu, Nov 27, 2014 at 02:14:38PM -0500, Lennart Sorensen wrote:
> >>>>>> On Thu, Nov 27, 2014 at 07:51:27PM +0100, Jan Kiszka wrote:
> >>>>>>> On 2014-11-27 19:18, Gilles Chanteperdrix wrote:
> >>>>>>>> According to the filesystem hierarchy standard, /mnt is the standard
> >>>>>>>> place for "temporarily mounted filesystems".
> >>>>>>>>
> >>>>>>>> http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard
> >>>>>>>
> >>>>>>> Right, another reason to NOT mess around with it: if something was
> >>>>>>> temporarily mounted there, we will create the mountpoint inside that
> >>>>>>> filesystem with unforeseeable side effects.
> >>>>>>
> >>>>>> I always read that as "temporarily mounted there by the admin or some
> >>>>>> other human". Certainly not automatic mounts by software. There is a
> >>>>>> reason /media and such exists on many distributins.
> >>>>>
> >>>>> I would not venture an "always", autofs for instance, used to mount
> >>>>> things under /mnt. and /media has not always existed either, we used
> >>>>> /mnt/cdrom.
> >>>>
> >>>> FHS on /mnt purpose:
> >>>>
> >>>> "This directory is provided so that the system administrator may
> >>>> temporarily mount a filesystem as needed. The content of this directory
> >>>> is a local issue and should not affect the manner in which any program
> >>>> is run."
> >>>>
> >>>> I think this makes it crystal clear that Xenomai is not supposed to
> >>>> touch it.
> >>>
> >>> Just to add another argument. I just asked a friend who is a
> >>> professional sysadmin. He creates directory under /mnt and mount
> >>> things under these directories. So, I am not sure the standard is
> >>> even applied by the people who should use it.
> >>>
> >>> If you read on the last site I sent, under the /media article:
> >>>
> >>> Amid much controversy and consternation on the part of system and
> >>> network administrators a directory containing mount points for
> >>> removable media has now been created. Funnily enough, it has been
> >>> named /media.
> >>>
> >>> Are you sure, 100% sure, that every Xenomai user expects to be able
> >>> to use /mnt as a mount point? Or that they will create directories
> >>> under /mnt like everybody has been doing since Linux exists?
> >>
> >> I'm both absolutely sure that a) has to be left alone by Xenomai because
> >> of requirements of the FHS and the way /mnt is used and b) we should try
> >> hard to avoid creating temporary dirs in persistent filesystems.
> >
> > This is ridiculous. Because the standard changed, and one
> > distribution, Debian, decided to follow the new standard, which
> > seems to be not widely accepted, and even controversial, you want to
> > impose what Debian does to everybody. The distribution I use has
> > mount points under /mnt. So, why following Debian and not the
> > distribution I use, and what sysadmin have been doing for ages?
> >
> > You want the mount point to be somewhere else? Fine, put a symbolic
> > link.
> >
> > mkdir /run/xenomai
> > ln -s /run/xenomai /mnt/xenomai
>
> Again, this is not acceptible as /mnt changes all the time and exposes
> various remote filesystems which will hide that link.
You are missing the point. Yes, Debian does that, but not all
distribution. Other distributions do not do that.
--
Gilles.
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