nixos-config/modules/sus-then-hib.nix

39 lines
1.2 KiB
Nix

{ config, pkgs, ... }: let
hibernateEnvironment = {
HIBERNATE_SECONDS = "3600";
HIBERNATE_LOCK = "/var/run/autohibernate.lock";
};
in {
systemd.services."awake-after-suspend-for-a-time" = {
description = "Sets up the suspend so that it'll wake for hibernation";
wantedBy = [ "suspend.target" ];
before = [ "systemd-suspend.service" ];
environment = hibernateEnvironment;
script = ''
curtime=$(date +%s)
echo "$curtime $1" >> /tmp/autohibernate.log
echo "$curtime" > $HIBERNATE_LOCK
${pkgs.utillinux}/bin/rtcwake -m no -s $HIBERNATE_SECONDS
'';
serviceConfig.Type = "simple";
};
systemd.services."hibernate-after-recovery" = {
description = "Hibernates after a suspend recovery due to timeout";
wantedBy = [ "suspend.target" ];
after = [ "systemd-suspend.service" ];
environment = hibernateEnvironment;
script = ''
curtime=$(date +%s)
sustime=$(cat $HIBERNATE_LOCK)
rm $HIBERNATE_LOCK
if [ $(($curtime - $sustime)) -ge $(($HIBERNATE_SECONDS - 5)) ] ; then
systemctl hibernate
else
${pkgs.utillinux}/bin/rtcwake -m no -s 1
fi
'';
serviceConfig.Type = "simple";
};
}