Re: dbus-deamon avoiding reboot after upgrade

From	Brian <ad44@cityscape.co.uk>
Newsgroups	linux.debian.user
Subject	Re: dbus-deamon avoiding reboot after upgrade
Date	2019-08-17 00:30 +0200
Message-ID	<yvSTn-YA-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <yvtih-1Vh-3@gated-at.bofh.it> <yvtV0-29W-11@gated-at.bofh.it> <yvEno-fR-7@gated-at.bofh.it> <yvOZr-6Z8-5@gated-at.bofh.it> <yvQeR-7Hl-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri 16 Aug 2019 at 22:39:09 +0300, Reco wrote:

> On Fri, Aug 16, 2019 at 07:14:58PM +0100, Brian wrote:
> > On Fri 16 Aug 2019 at 09:51:15 +0300, Reco wrote:
> > 
> > > On Thu, Aug 15, 2019 at 08:47:34PM +0100, Brian wrote:
> > > 
> > > > Nowadays that system often relies on printer/print queue Bonjour
> > > > broadcasts.
> > > 
> > > And that is called "jumping to conclusions".
> > > Printing itself haven't changed a bit for last 15 years - a print server
> > > takes user's PS or PDF, mangles it to fit printer's representation (be
> > > it PCL or something else), and feeds it to the printer. By utilizing
> > > unicasts of course.
> > 
> > I was going to let this go because it takes us beyond the server
> > situation we are discussing and is a reasonable, succinct description
> > of classic printing (which will become unsupported by CUPS in a few
> > years time).
> > 
> > However, modern printers will accept and print jobs (e.g. PDF and JPEG)
> > without the mangling. These AirPrint-enabled, IPP printers completely
> > do away with having to use non-free software or plugins also. What is
> > there to dislike about that?
> 
> Nothing. But it also means that one only needs something like ipptool
> ([1]) on client-side, leaving CUPS (and a whole notion of a "print
> server") out of the equation completely.

ipptool depends on libcups2.

> > > A user can discover a print server via mDNS multicasts (*not*
> > > broadcasts). Or a user can be told a location of such print server.
> > 
> > So - I give my VIP, Android-using customer a piece of paper with a URI
> > to type into his phone rather than telling him which printer to use to
> > print out the multimillion Euro contract he has just signed?
> > Very last century.
> 
> Multicasts are limited to a single L2 network segment by their very
> definition.

DNS-SD/Bonjour not scaling on typical multi-segment networks is a
recognised issue by CUPS upstream. Developments at

 https://tools.ietf.org/wg/dnssd/

could produce a solution that CUPS could take advantage of.
 
> Putting your printers (or print servers) within a guest network (WiFi
> for Android customers) - that's a last century indeed.
> 
> Besides, "multimillion Euro contract" can involve some pretty secretary
> lady who's happy to print said contract. Just saying.

I have no idea whether a secretary likes to be typecast, but is being
pretty, male and amenable a prerequisite to obtaining the post? 

Anyway, the secretary has knocked off and I am left to instruct my VIP
how to use his Android phone to type the printer location without a
mistype:

 dnssd://ENVY4500._ipp._tcp.local/?uuid=1c852a4d-b800-1f08-abcd-308d99fafac2

So much for telling a user a location. While he is typing I could rivet
him with describing the difference between a broadcast and a multicast.

-- 
Brian.

Thread

dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-13 20:10 +0200
  Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-13 21:30 +0200
    Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-14 07:50 +0200
      Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-14 08:50 +0200
        Re: dbus-deamon avoiding reboot after upgrade Sven Hartge <sven@svenhartge.de> - 2019-08-14 09:00 +0200
          Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-14 09:30 +0200
            Re: dbus-deamon avoiding reboot after upgrade Curt <curty@free.fr> - 2019-08-14 10:30 +0200
      Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-15 19:00 +0200
        Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-15 19:20 +0200
          Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-15 20:50 +0200
            Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-15 21:10 +0200
              Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-15 21:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-16 09:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 12:20 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 20:20 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-16 21:40 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-17 00:30 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-17 12:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-17 13:20 +0200
            Re: dbus-deamon avoiding reboot after upgrade Tixy <tixy@yxit.co.uk> - 2019-08-15 23:20 +0200
              Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-15 23:40 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-16 09:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Greg Wooledge <wooledg@eeg.ccf.org> - 2019-08-16 14:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 16:30 +0200
          Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-15 21:00 +0200
        Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-16 11:10 +0200
          Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 12:10 +0200
            Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 12:30 +0200
              Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 12:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 13:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 13:10 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 13:20 +0200
                Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 13:30 +0200
                Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-16 13:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 14:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 13:00 +0200
          Re: dbus-deamon avoiding reboot after upgrade <tomas@tuxteam.de> - 2019-08-16 12:30 +0200
  Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-17 20:20 +0200
    Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-18 12:30 +0200
      Re: dbus-deamon avoiding reboot after upgrade Brian <ad44@cityscape.co.uk> - 2019-08-18 15:20 +0200
        Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-18 17:00 +0200
          Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-19 09:30 +0200
            Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-19 09:40 +0200
              Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-19 10:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-19 10:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade Andrei POPESCU <andreimpopescu@gmail.com> - 2019-08-19 21:10 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-19 21:20 +0200
              Re: dbus-deamon avoiding reboot after upgrade Bastien Durel <bastien@durel.org> - 2019-08-19 10:50 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-19 11:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Bastien Durel <bastien@durel.org> - 2019-08-19 12:00 +0200
                Re: dbus-deamon avoiding reboot after upgrade Reco <recoverym4n@enotuniq.net> - 2019-08-19 12:10 +0200
                Re: dbus-deamon avoiding reboot after upgrade Greg Wooledge <wooledg@eeg.ccf.org> - 2019-08-19 16:20 +0200
                Re: dbus-deamon avoiding reboot after upgrade Bastien Durel <bastien@durel.org> - 2019-08-19 18:20 +0200
        Re: dbus-deamon avoiding reboot after upgrade john doe <johndoe65534@mail.com> - 2019-08-18 17:00 +0200

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