On Sat, Apr 04, 2020 at 09:29:04PM +0000, Laurent Bercot wrote: > > > 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. > > The notification-fd file is for s6-supervise, i.e. s6's implementation > of a supervisor. It is meant to make the fd number configurable on the > supervisor side, to allow daemons to use whatever fd they choose. > > On the daemon side, you can use any option you like to tell the daemon > what fd it should write to. It has nothing to do with s6, and I have no > recommended policy for daemons. > > > > s6-log however uses the -d argument to pass the > > fd, so I'll go with that. > > -d works for s6-log and a few others of my programs. For others, -d > is already used for something else, so I use another option. > I really suggest you don't try to standardize a way to tell daemons > what fd to use. No method will be universal, there will always be > some obscure daemon that will conflict with it. >
Right, I didn't mean -d specifically :) I just meant pass the fd# as a command line argument. thanks, -serge
