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#!/bin/sh
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
readonly PROGRAM_NAME="$(basename "$0")"
main()
{
# Handle opts
while getopts ":C:S:c:ht:v" opt
do
case "$opt" in
S) rundir=$OPTARG ;;
d) command_dir=$OPTARG ;;
h) usage && exit 0 ;;
v) verbose=1 ;;
*)
printf "Invalid option passed: %s\n" "$OPTARG" >&2
;;
esac
done
shift $(( OPTIND - 1 ))
# Set default values
[ -z "$rundir" ] && rundir="$XDG_RUNTIME_DIR/$PROGRAM_NAME"
time_old=0
time_now="$(xprintidle)"
# Check availability of dependencies
for i in xprintidle xset
do
command -v "$i" >/dev/null && continue
log "Missing dependency $i"
exit 3
done
# Ensure $DISPLAY is set
if [ -z "$DISPLAY" ]
then
log "\$DISPLAY is unset"
exit 4
fi
# Initialize the rundir
log "Create rundir ($rundir)"
mkdir -p -- "$rundir"
printf "0\n" > "$rundir/paused"
[ ! -f "$rundir/state" ] && printf "active\n" > "$rundir/state"
# Enter the loop
while :
do
# Do nothing if the program is paused
if is_paused
then
log "$PROGRAM_NAME is paused ($rundir)"
sleep 1
continue
fi
# Get the time the system has been idle in milliseconds
time_old=$time_now
time_now="$(($(xprintidle) / 1000))"
# Run command_active upon detecting activity
if [ "$((time_now))" -lt "$((time_old))" ]
then
log "Detected activity ($time_now < $time_old)"
cmd="$(get_script active)"
if [ "$cmd" = "" ]
then
log "No executable found for activation"
sleep 1
continue
fi
log "> $cmd"
$cmd
fi
# Run command based on inactivity duration
loop_index=$(($time_old))
log "Running (potential) scripts $time_old through $time_now"
while [ "$(($loop_index))" -lt "$(($time_now))" ]
do
loop_index="$(($loop_index + 1))"
log "Running script for $loop_index"
cmd=$(get_script idle_$loop_index)
if [ "$cmd" = "" ]
then
log "No executable found for idling (${loop_index}s)"
continue
fi
log "> $cmd"
$cmd
done
# Sleep to not burn your CPU
sleep 1
done
}
get_script()
{
if [ -n "$command_dir" ]
then
if [ -x "$command_dir/$1" ]
then
printf "%s\n" "$command_dir/$1"
return
fi
# Don't continue if a command_dir was explicitly set
return
fi
set -f
OIFS=$IFS
IFS=:
dirs="$XDG_CONFIG_HOME:$XDG_CONFIG_DIRS:$HOME/.config"
for dir in $dirs
do
[ "$dir" = "" ] && continue
if [ -x "$dir/$PROGRAM_NAME/$1" ]
then
printf "%s\n" "$dir/$PROGRAM_NAME/$1"
return
fi
done
IFS=$OIFS
set +f
}
is_paused()
{
if [ "$(head -n 1 "$rundir/paused")" = "0" ]
then
return 1
fi
return 0
}
log()
{
[ -z "$verbose" ] && return
printf "[%s] %s\n" "$(prettify_time "$time_now")" "$*" >&2
}
prettify_time()
{
printf "%03dh %02dm %02ds\n" \
"$(( $1 / 60 / 60 ))" \
"$(( $1 / 60 % 60 ))" \
"$(( $1 % 60 ))"
}
usage()
{
cat <<EOF
Usage:
${0##*/} -h
${0##*/} [-C <command>] [-R <path>] [-c <command>] [-t <timeout>] [-v]
Force-blank the screen after a certain timeout.
Options:
-C Set the command to run when X is becoming active.
-R Set the location of the rundir.
-c Set the command to run when X is going idle.
-h Show this help text and exit.
-t Set the timeout in seconds. Defaults to 60.
-v Add verbosity.
EOF
}
main "$@"
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