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[Unit]
Description=Delayed hibernation trigger
Documentation=https://bbs.archlinux.org/viewtopic.php?pid=1420279#p1420279
Documentation=https://wiki.archlinux.org/index.php/Power_management
Conflicts=hibernate.target hybrid-sleep.target
Before=sleep.target
StopWhenUnneeded=true
[Service]
Type=oneshot
RemainAfterExit=yes
Environment="WAKEALARM=/sys/class/rtc/rtc0/wakealarm"
Environment="SLEEPLENGTH=+30min"
ExecStart=-/usr/bin/sh -c 'echo -n "alarm set for "; date +%%s -d$SLEEPLENGTH | tee $WAKEALARM'
ExecStop=-/usr/bin/sh -c '\
alarm=$(cat $WAKEALARM); \
now=$(date +%%s); \
if [ -z "$alarm" ] || [ "$now" -ge "$alarm" ]; then \
echo "hibernate triggered"; \
systemctl hibernate; \
else \
echo "normal wakeup"; \
fi; \
echo 0 > $WAKEALARM; \
'
[Install]
WantedBy=sleep.target
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