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#!/bin/ash
# Called to calculate the next wakeup of this machine. Should be called whenever
# it might make sense to update this, e.g. right after boot, when entering/leaving
# standby, and when shutting down.
if [ "$1" = "test" ]; then
shift
TEST=1
SCHEDULE="$@"
else
SCHEDULE=
TEST=
. /opt/openslx/config
fi
# Figure out the next rtcwake
SCHEDULE="$SCHEDULE $SLX_WAKEUP_SCHEDULE"
if [ "$1" = "suspend" ]; then
# If we're about to suspend, consider reboot and shutdown too - we
# need to wake up to execute these
SCHEDULE="$SCHEDULE $SLX_SHUTDOWN_SCHEDULE $SLX_REBOOT_SCHEDULE"
fi # suspend == true
SCHEDULE=$( echo ${SCHEDULE} ) # poor man's trim
NEXT=
if [ -n "$SCHEDULE" ]; then
# Time-math in ash - yay
TODAY=$(date +%Y-%m-%d)
# Use tomorrow instead of adding 86400 seconds so it (hopefully) works when DST changes
TOMORROW=$(date --date="+1 day" +%Y-%m-%d)
NOW=$(date +%s)
for t in $SCHEDULE; do
HOUR=${t%%:*}
MINUTE=${t##*:}
[ -z "$HOUR" -o -z "$MINUTE" ] && continue
[ "$HOUR" -lt 0 -o "$HOUR" -gt 23 ] && continue
[ "$MINUTE" -lt 0 -o "$MINUTE" -gt 59 ] && continue
# wake up 2 minutes early; for the shutdown/reboot times this is required
# so the actual cronjob for the shutdown/reboot will run.
# Otherwise, since the wakeup will take some seconds, the actual cronjob
# will not trigger, since it lies a few seconds in the past.
# For the scheduled wakeups this would't be needed, but two minutes
# early shouldn't hurt anyone.
TS=$(date --date "-2 minutes $TODAY $t" +%s)
[ "$TS" -le "$NOW" ] && TS=$(date --date "-2 minutes $TOMORROW $t" +%s)
if [ -z "$NEXT" ] || [ "$NEXT" -gt "$TS" ]; then
NEXT="$TS"
fi
done
fi
if [ -n "$TEST" ]; then
echo -n "Next wakeup: "
date -d "@$NEXT"
exit 0
fi
# Enable WOL again, in case it got disabled
/opt/openslx/scripts/cron-enable_wol
if [ -n "$NEXT" ]; then
# Set -l and hope it does the right thing on DST
rtcwake -l -m no -t "$NEXT"
else
rtcwake -m disable
fi
exit 0
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