Re: [PLUG] Linux mount of Windows share keeps dropping

[Keith via plug <plug@lists.phillylinux.org>]

On 10/22/20 8:21 PM, Walt Mankowski via plug wrote:
> Thanks Joe! I didn't know about either automount or credentials files!
> It sounds like it's exactly what I was looking for. I'll give them a
> try tomorrow.
>
> Walt
>
> On Thu, Oct 22, 2020 at 07:21:08PM -0400, Joe Rosato via plug wrote:
> > Put it automount. If a network issue and you use it sparingly, it will
> > mostly stay unmounted.. and then mount when you use it. Saw this while
> > waiting in car (parked) so did not read the whole thread, if this was
> > touched upon. Do a search, you just need to put the login/passwd in a
> > credentials file.
> >
> > On Thu, Oct 22, 2020, 5:15 PM Walt Mankowski via plug <
> > plug@lists.phillylinux.org> wrote:
> >
> > > On Thu, Oct 22, 2020 at 04:55:36PM -0400, Keith via plug wrote:
> > > > Ah... ok, the version thing definitely was/is a thing but I haven't had
> > > to
> > > > use that trick in at least 10 years.  Structurally speaking what I'm
> > > going
> > > > after is a refreshing of stale links.  The network connection is at a
> > > lower
> > > > level than the user so, for instance, I use this same technique for
> > > > "healing" SIP carrier connections for VoIP servers.  All you are doing is
> > > > making sure the connection is available.  Your applications will have no
> > > > knowledge of those lower level lower details.  Either apps can access
> > > files
> > > > or not so this type of thing is benign (i.e. it fails silently if you are
> > > > still connected).  Playing with the version numbers may yield some relief
> > > > but typically with that solution it was about forcing the share protocol
> > > > down to an earlier version.  1.0 might be too old so you may need to use
> > > > something higher.
> > > This morning I tried mounting it with every version listed in the
> > > manpage for mount.cifs. 1.0 is the only one that worked.
> > >
> > > Aside from that I'm not sure I understand what it is you're suggesting
> > > I do. Remounting it requires entering both my local password (for
> > > sudo) and my network password, so it would be tricky doing that via
> > > something like cron.
> > >
> > > Walt

When remounting you just specify the password on the command line so, 
for example if you initially did something like this:

mount -t cifs -o user=someguy  //a.b.c.d/someshare /mnt/somemountpoint

the remount command would be:

mount -t cifs -o remount,user=someguy,password=somepassword 
//a.b.c.d/someshare /mnt/somemountpoint

If your share is mounted, this fails silently.  If not, it will 
remount.  You can put this in a shell script that executes an infinite 
loop with an appropriate sleep time.  To protect your password, you 
should encrypt the file.  You can decrypt and execute it in memory.  
This link might be a good start for that:

https://stackoverflow.com/questions/14651616/automatically-decrypt-and-run-an-encrypted-bash-script-without-saving-decrypted


--
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Keith C. Perry, MS E.E.
Managing Member, DAO Technologies LLC
(O) +1.215.525.4165 x2033
(M) +1.215.432.5167
www.daotechnologies.com

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