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36 lines
1.4 KiB
Bash
Executable File
36 lines
1.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Save every kitty daily session (~/.config/kitty/day_session.py) right before
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# shutdown/reboot.
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#
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# kitty-day-save.service runs this under a logind "delay" inhibitor. When a
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# shutdown or reboot starts, logind broadcasts PrepareForShutdown(true) and
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# waits (InhibitDelayMaxSec, 5 s by default) for the lock to be released, which
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# happens when this script exits. Nothing has been killed yet at that point, so
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# every kitty still has all of its windows. The flush also stops further saves
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# for a minute, so windows dying during the shutdown can't shrink the saved day.
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#
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# Usage: kitty-day-save hold the lock, wait for a shutdown, flush, exit
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# kitty-day-save --now flush every running kitty immediately
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set -u
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case "${1-}" in
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--now)
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# Every kitty on kitty.conf listens on @kitty-<pid>; ones that don't own
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# a day session ignore the flush.
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for s in $(grep -oE '@kitty-[0-9]+$' /proc/net/unix | sort -u); do
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timeout 3 kitten @ --to "unix:$s" action kitten day_session.py flush >/dev/null 2>&1 &
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done
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wait
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;;
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--wait)
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# grep returns on the first match; gdbus is left to the service's cgroup.
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grep -m1 -q 'PrepareForShutdown (true' < <(
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gdbus monitor --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1
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) && exec "$0" --now
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;;
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*)
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exec systemd-inhibit --what=shutdown --mode=delay --who=kitty \
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--why='Saving kitty sessions' "$0" --wait
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;;
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esac
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