On Fri, Apr 03, 2020 at 07:41:25AM +0000, Jonathan de Boyne Pollard wrote: > Serge E. Hallyn: > > > If making changes to daemons were going to palatable, [...] > > > > Clearly, it *is* palatable, given that a few people have been adding the > systemd mechanism to their programs for several years, now. Pierre-Yves
Well both that and the less successfull upstart sigstop had the full force of popular distros behind them. Still I hope you're right, and maybe I'll go ahead and post some patches for a few daemons. > Ritschard's code and Cameron Norman's code come straight out of actual > service programs. > Serge E. Hallyn: > > > you are arguing for parsing stdout for a text message and/or using > > pidfiles (written to an fd) > > > > No, M. Bercot is not. Quite the opposite, in fact. The s6 readiness > mechanism demands *neither* pidfiles *nor* standard output. It's *any* file > descriptor (as defined by the service), and *just a linefeed* followed by > closing the descriptor. > > I'm nodding at almost everything M. Bercot is saying here, by the way. > > * http://jdebp.uk./FGA/unix-daemon-readiness-protocol-problems.html Yes it sounds like I completely misread the earlier emails, sorry about that. Now, looking at http://skarnet.org/software/s6/notifywhenup.html, I'm probably not reading that quite right, but it seems to tie the proposal to the 'notifcation-fd' file in the service directory, making it a bit less general. s6-log however uses the -d argument to pass the fd, so I'll go with that. thanks, -serge
