On Sat, 20 Sep 2014 09:45:30 +0900 Joel Rees <[email protected]> wrote:
> On Sat, Sep 20, 2014 at 5:28 AM, Steve Litt > <[email protected]> wrote: > > On Fri, 19 Sep 2014 21:08:45 +0400 > > Reco <[email protected]> wrote: > > > > > >> 4) Why re-implementing systemd? Writing your own init is much more > >> fun, as [1] shows to us. > > > > What other things, besides firing up /dev/tty* and running all > > daemons, does an init program absolutely have to do? > > Well, I'm sitting here looking at the results of > > ps wwaux | less > > on a wheezy box. (And I'll check it on openbsd when I got back from > running an errand for my wife.) > > And I'm thinking, not much. > > Managing threads doesn't need to be part of init. > > softirqs don' have to be part of init. > > Watchdog doesn't need to be part of init. (Who'd've thunk it?) > > Managing swap doesn't have to be part of init. > > > For > > authentication, is there any way to use a non-systemd connected > > PAM, or any other mechanism? > > My goodness. That's there as a separate daemon as well. > > > I'm not asking about replacing what the current init or systemd does > > --- I'm asking for the absolute minimum that PID 1 must do. > > The only other thing that I am aware of is the collection of dead > processes, as the grandaddy of all processes. > > I'm thinking that may mean init has to be the backstop for signals, as > well. But I believe that actually handling the signals that hit the > backstop is done elsewhere. > > Which, I think, is at the core of the disagreement on systemd. > > Do we use a streamlined init, forcing interprocess communication to be > well-defined and explicit? > > Or do we use a larger init, more capable of fielding less well-defined > and more implicit, meaning "easier" interprocess communication > techniques? > > (Unpacking all the implications of that question here will be viewed > by some as "fud" or "scaremongering" or such, so I'll refrain at this > point.) Joel, Check this out: http://code.dogmap.org/svscan-1/ This guy's actually done it and gotten it running. SteveT Steve Litt * http://www.troubleshooters.com/ Troubleshooting Training * Human Performance -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]
