socks5-entrypoint.sh

#!/usr/bin/env bash

function spawn {
    if [[ -z ${PIDS+x} ]]; then PIDS=(); fi
    "$@" &
    PIDS+=($!)
}

function join {
    if [[ ! -z ${PIDS+x} ]]; then
        for pid in "${PIDS[@]}"; do
            wait "${pid}"
        done
    fi
}

function on_kill {
    if [[ ! -z ${PIDS+x} ]]; then
        for pid in "${PIDS[@]}"; do
            kill "${pid}" 2> /dev/null
        done
    fi
    kill "${ENTRYPOINT_PID}" 2> /dev/null
}

export ENTRYPOINT_PID="${BASHPID}"

trap "on_kill" EXIT
trap "on_kill" SIGINT

spawn socks5

if [[ -n "${SOCKS5_UP}" ]]; then
    spawn "${SOCKS5_UP}" "$@"
elif [[ $# -gt 0 ]]; then
    "$@"
fi

if [[ $# -eq 0 || "${DAEMON_MODE}" == true ]]; then
    join
fi