Date: Sun, 12 Feb 2012 23:32:17 +0200 From: Mikolaj Golub <trociny@freebsd.org> To: Jos Backus <jos@catnook.com> Cc: src-committers@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>, Guy Helmer <ghelmer@palisadesystems.com>, svn-src-all@freebsd.org, Andrey Zonov <andrey@zonov.org>, svn-src-head@freebsd.org Subject: Re: svn commit: r230869 - head/usr.sbin/daemon Message-ID: <86wr7r4u1q.fsf@kopusha.home.net> In-Reply-To: <CAETOPp0mYn0fVdBdzsDaH16SXzFHa_wLXE3vg--4cgXwVFg9pA@mail.gmail.com> (Jos Backus's message of "Sun, 12 Feb 2012 12:56:58 -0800") References: <20120205214647.GI30033@garage.freebsd.pl> <86sjiov29o.fsf@in138.ua3> <20120206082706.GA1324@garage.freebsd.pl> <86wr7zmy8f.fsf@kopusha.home.net> <20120206221742.GA1336@garage.freebsd.pl> <86liodu3me.fsf@in138.ua3> <20120208090600.GA1308@garage.freebsd.pl> <86sjihsln4.fsf@kopusha.home.net> <4F365C10.5050607@zonov.org> <861upz6fcg.fsf@kopusha.home.net> <20120212200253.GC1355@garage.freebsd.pl> <4F38240B.5040507@zonov.org> <CAETOPp0mYn0fVdBdzsDaH16SXzFHa_wLXE3vg--4cgXwVFg9pA@mail.gmail.com>
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On Sun, 12 Feb 2012 12:56:58 -0800 Jos Backus wrote: JB> Right. So why not add a Unix socket listener to daemon(8) so the rc.d JB> script can send commands over the socket instead of using the pidfile? JB> This is what supervise/svc let you do today. JB> I don't understand why this solution isn't obvious once you are JB> committed to running daemon(8) for each service anyway. And then you JB> don't need pidfiles because now you have a much better, standard JB> control interface (sending commands to daemon(8) and gathering JB> responses). Why do you think one is committed to running daemon(8) for each service? daemon(8) is for a program that can't daemonize itself and you want an easy way to run it detached from a terminal. And have an easy way to integrate it in rc(8) using rc.subr(8). And rc.subr(8) knows about pidfiles but knows nothing about unix sockets. Although I don't say that the idea to use a socket file for monitoring and control is bad in general. -- Mikolaj Golub
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