#!/bin/bash

DISPLAY=$1

if [ -e /usr/lib/bash/sleep ]
then
    enable -f /usr/lib/bash/sleep sleep
fi

export NOTICE=y
noticeLOG() { [ "$NOTICE" ] || return; echo "Notice: $*" >&2; }
debugLOG() { [ "$DBG" ] || return; echo "Debug: $*" >&2; }

. sliceweasel.lib.sh

vkill()
{
    if [ $# = 0 ]
    then
        return
    fi
    (
        if [ "$(id -u)" = 0 ]
        then sudo=
        else sudo=sudo
        fi
        set -x
        ps u "$@"
        $sudo kill "$@"
    )
}

slay_slayer()
{
    if [ "$ioslay" ]
    then
        children=$(for pid in $ioslay; do pgrep -P $ioslay; done)
        grandchildren=$(for pid in $children; do pgrep -P $pid; done)
        vkill $ioslay $children $grandchildren
    fi
}

group_procs=$(get_firefox_cgroup_procs)

ioslay=
lastprocs=
SIGNALLED=
trap 'SIGNALLED=y' SIGINT SIGTERM SIGHUP
while [ ! "$SIGNALLED" ]
do
    if ! [ -e "$group_procs" ]
    then
        [ "$warned" ] || echo "Warning: firefox not running or cgroup not found" >&2
        warned=y
    else
        if [ "$warned" ]
        then
            echo "Found firefox cgroup: $group_procs" >&2
            warned=
        fi
        read -N 1000100 procs < "$group_procs"
        if [ "$procs" ]
        then
            set --
            for pid in $procs
            do
                read comm < /proc/$pid/comm
                case "$comm" in
                    'Isolated Web Content' | 'Web Content' | 'Isolated Web Co')
                        set -- "$@" "$pid"
                        debugLOG "accept /proc/$pid/comm $comm"
                        ;;
                    *)
                       debugLOG "reject /proc/$pid/comm $comm"
                esac
            done

            # echo "pids: ($*|$(echo $procs))" >&2
            if [ "$lastargs" != "$*" ]
            then
                slay_slayer
                wait $ioslay
                if [ $# -gt 0 ]
                then
                    ioslay-firefox "$@" &
                    ioslay=$!
                    noticeLOG "Launched ioslay-firefox[$ioslay] $*"
                fi
            fi
            lastargs=$*
        fi
    fi
    sleep 1
done
slay_slayer