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#!/bin/bash
# Shutdown Script Emulator Sceleton
# by cyperghost for retropie


# --------------------------
# Initial release: ??? Don't know January 2018?
# 04/19/18 Release in RetroPie forums
# 04/20/18 julenvitoria introduced kill -9 signal for emulators

# This function is called still all childPIDs are found
function getcpid() {
local cpids="$(pgrep -P $1)"
    for cpid in $cpids;
    do
        pidarray+=($cpid)
        getcpid $cpid
    done
}

# Abolish sleep timer! This one is much better!
function smart_wait() {
    local PID=$1
    while [[ -e /proc/$PID ]]
    do
        sleep 0.05
    done
}

# Our entrypoint! RUNCOMMAND is alpha, emulator is OMEGA
motherpid="$(pgrep -f -n runcommand.sh)"

# if there is no runcommand.sh running then exit
[ "$motherpid" ] && getcpid $motherpid || exit

# Reverse array and do your TERM job
for ((z=${#pidarray[*]}-1; z>-1; z--)); do
    echo "Terminate PID ${pidarray[z]}"
    kill -9 ${pidarray[z]}
    smart_wait ${pidarray[z]}
done