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#!/bin/bash
# From /usr/share/doc/xss-lock/transfer-sleep-lock-i3lock.sh on Debian stretch
## CONFIGURATION ##############################################################
# Options to pass to i3lock
# i3-rotate-wallpaper only ever generates a wallpaper.png suitable for
# a single monitor, so just ignore wallpaper.png if more than one
# monitor is plugged in
monitors="$(xrandr -q | grep ' connected' | wc -l)"
if [ -e "$HOME/local/wallpaper.png" ] \
&& ! [ $monitors -gt 1 ]; then
i3lock_options="-i $HOME/local/wallpaper.png"
else
i3lock_options="-c 3f3f3f"
fi
# Run before starting the locker
pre_lock() {
mpc pause
return
}
# Run after the locker exits
post_lock() {
return
}
###############################################################################
pre_lock
# We set a trap to kill the locker if we get killed, then start the locker and
# wait for it to exit. The waiting is not that straightforward when the locker
# forks, so we use this polling only if we have a sleep lock to deal with.
if [[ -e /dev/fd/${XSS_SLEEP_LOCK_FD:--1} ]]; then
kill_i3lock() {
pkill -xu $EUID "$@" i3lock
}
trap kill_i3lock TERM INT
# we have to make sure the locker does not inherit a copy of the lock fd
i3lock $i3lock_options {XSS_SLEEP_LOCK_FD}<&-
# now close our fd (only remaining copy) to indicate we're ready to sleep
exec {XSS_SLEEP_LOCK_FD}<&-
while kill_i3lock -0; do
sleep 0.5
done
else
trap 'kill %%' TERM INT
i3lock -n $i3lock_options &
wait
fi
post_lock
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