Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
On Wed, 07.08.13 10:12, Mathijs Kwik (math...@bluescreen303.nl) wrote: > Hi all, > > I have a few things that need to get run after waking up my laptop > (things like hdparm to set device power options/spindown time). > I created oneshot, remainafterexit services for those and made them > wanted by multi-user.target.This works fine for the first boot. > > As I consider these services "dead" after a suspend/hibernate, I added > Conflicts=sleep.target, so now systemd is aware that these services > are no longer active after a wakeup. > > Now I would like to somehow have these services restart on wakeup. > I can add these services to some new target(wakeup.target), but I > don't know how to proceed from there. I thought of making > wakeup.target WantedBy suspend.target, After suspend.target, but since > suspend.target pulls in sleep.target (which conflicts with these > services) that will fail. More so, after wakeup.target is started the > first time, it will never go down itself, so the second wakeup won't > do anything. The same is true for multi-user.target, once that is > reached/activated on first boot, it never deactivates until shutdown. > > How should a situation like this be handled? > Ideally, I don't want to use: > - /usr/lib/systemd/system-sleep (considered hacky) Well, doing hdparm fiddling after suspend is a hack in itself, hence /usr/lib/systemd/system-sleep/ is precisely the right hacky choice to implement something like this. It's simple, synchronous and the intended place to put hacks like this. Lennart -- Lennart Poettering - Red Hat, Inc. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
Hi, Yep. I have the exact same sleep@.service and it works. BTW, sleep.target is pulled in by both suspend.target and hibernate.target. There are some use cases that a hook should be only invoked by suspend.target (or hibernate.target). For instance, I have a hook used with the tuxoniceui: [Unit] Description=tuxoniceui hibernate hook Before=hibernate.target StopWhenUnneeded=yes [Service] Type=oneshot RemainAfterExit=yes ExecStartPre=/bin/bash -c "echo `fgconsole` > %t/tuxoniceui" ExecStart=/bin/chvt 63 ExecStop=-/bin/bash -c "chvt `< %t/tuxoniceui`" ExecStopPost=-/bin/rm -rf %t/tuxoniceui [Install] WantedBy=hibernate.target Obviously I don't want it to be called for suspend.target. The problem is, by default, suspend.target/hibernate.target is not a StopWhenUnneeded service. I have to overwrite it in /etc/systemd/system/hibernate.target.d. It's completely OK for me to do this. What I wonder is, what is the reason by they are not StopWhenUnneeded services? Uh, seems overly off-topic... Regards. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
Am 08.08.2013 08:12, schrieb 孙冰: > I use this: > > [Unit] > Description=Wicd sleep hook > Before=sleep.target > StopWhenUnneeded=yes > > [Service] > Type=oneshot > RemainAfterExit=yes > ExecStart=-/usr/share/wicd/daemon/suspend.py > ExecStop=-/usr/share/wicd/daemon/autoconnect.py > > [Install] > WantedBy=sleep.target > - Thank you very much for this idea. I think it can be expressed in a more generic way: [Unit] Description=%I sleep hook Before=sleep.target StopWhenUnneeded=yes [Service] Type=oneshot RemainAfterExit=yes ExecStart=-/usr/bin/systemctl stop %I ExecStop=-/usr/bin/systemctl start %I [Install] WantedBy=sleep.target - It would be invoked from sleep-hook@.service. What do you think? signature.asc Description: OpenPGP digital signature ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
孙冰 writes: > I use this: > > [Unit] > Description=Wicd sleep hook > Before=sleep.target > StopWhenUnneeded=yes > > [Service] > Type=oneshot > RemainAfterExit=yes > ExecStart=-/usr/share/wicd/daemon/suspend.py > ExecStop=-/usr/share/wicd/daemon/autoconnect.py > > [Install] > WantedBy=sleep.target > - Clever :) It turns out I always misinterpreted the documentation for StopWhenUnneeded. I never read past the first sentence and assumed this option was only going to stop services "when it felt like it". But this is a very nice solution, still stateful (remainafterexit) but by focusing on the sleep-state instead of the before-sleep and after-sleep it nicely works around cyclic/conflicting dependencies. Thanks! ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
I use this: [Unit] Description=Wicd sleep hook Before=sleep.target StopWhenUnneeded=yes [Service] Type=oneshot RemainAfterExit=yes ExecStart=-/usr/share/wicd/daemon/suspend.py ExecStop=-/usr/share/wicd/daemon/autoconnect.py [Install] WantedBy=sleep.target - ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
Indeed, that sounds like a solution. It's a bit of a philosophical thing though, remainafterexit+oneshot works nicely for things that represent a certain state (powersaving on) which can be inspected and turned off. oneshot "scripts" don't feel natural to me somehow without such a state (which RemainAfterExit provides). But maybe I need to alter my view on services a bit. For now I will try your solution. Thanks On Wed, Aug 7, 2013 at 1:02 PM, Tom Gundersen wrote: > On Wed, Aug 7, 2013 at 10:12 AM, Mathijs Kwik > wrote: >> I have a few things that need to get run after waking up my laptop >> (things like hdparm to set device power options/spindown time). >> I created oneshot, remainafterexit services for those and made them >> wanted by multi-user.target.This works fine for the first boot. > > Are you sure you want RemainAfterExit? Without it you should be able > to set WantedBy=sleep.target and After=sleep.target. > >> As I consider these services "dead" after a suspend/hibernate, I added >> Conflicts=sleep.target, so now systemd is aware that these services >> are no longer active after a wakeup. >> >> Now I would like to somehow have these services restart on wakeup. >> I can add these services to some new target(wakeup.target), but I >> don't know how to proceed from there. I thought of making >> wakeup.target WantedBy suspend.target, After suspend.target, but since >> suspend.target pulls in sleep.target (which conflicts with these >> services) that will fail. More so, after wakeup.target is started the >> first time, it will never go down itself, so the second wakeup won't >> do anything. The same is true for multi-user.target, once that is >> reached/activated on first boot, it never deactivates until shutdown. >> >> How should a situation like this be handled? >> Ideally, I don't want to use: >> - /usr/lib/systemd/system-sleep (considered hacky) >> - a service/script that runs "systemctl start ..." (secret >> dependency, hidden from systemd) >> >> Thanks, >> Mathijs >> ___ >> systemd-devel mailing list >> systemd-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/systemd-devel ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Fwd: best way to handle service restarts after hibernate/suspend?
On Wed, Aug 7, 2013 at 10:12 AM, Mathijs Kwik wrote: > I have a few things that need to get run after waking up my laptop > (things like hdparm to set device power options/spindown time). > I created oneshot, remainafterexit services for those and made them > wanted by multi-user.target.This works fine for the first boot. Are you sure you want RemainAfterExit? Without it you should be able to set WantedBy=sleep.target and After=sleep.target. > As I consider these services "dead" after a suspend/hibernate, I added > Conflicts=sleep.target, so now systemd is aware that these services > are no longer active after a wakeup. > > Now I would like to somehow have these services restart on wakeup. > I can add these services to some new target(wakeup.target), but I > don't know how to proceed from there. I thought of making > wakeup.target WantedBy suspend.target, After suspend.target, but since > suspend.target pulls in sleep.target (which conflicts with these > services) that will fail. More so, after wakeup.target is started the > first time, it will never go down itself, so the second wakeup won't > do anything. The same is true for multi-user.target, once that is > reached/activated on first boot, it never deactivates until shutdown. > > How should a situation like this be handled? > Ideally, I don't want to use: > - /usr/lib/systemd/system-sleep (considered hacky) > - a service/script that runs "systemctl start ..." (secret > dependency, hidden from systemd) > > Thanks, > Mathijs > ___ > systemd-devel mailing list > systemd-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/systemd-devel ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
