bind: address already in use about socks5 HOT 2 CLOSED

#!/usr/bin/env bash

set -e

proxy_port=1080

netstat_out="$(netstat -nap 2>/dev/null | grep -w $proxy_port || true)"
if [ -n "$netstat_out" ]; then
  echo "error: address already in use"
  echo "found $(echo "$netstat_out" | wc -l) open connections with port $proxy_port:"
  echo "$netstat_out"
  #if true; then
  if false; then
    exit 1
  else
    echo "killing worker procs using port $proxy_port"
    netstat -nap 2>/dev/null | grep -w $proxy_port | awk '{ print $7 }' | cut -d/ -f1 | grep -vxFe - | xargs -r kill
  fi
fi

cd cmd/socks5/
go build
cd ../..

./cmd/socks5/socks5 &

socks5_pid=$!;
echo socks5_pid: $socks5_pid;
sleep 2;

#if true; then
if false; then
  # socks5
  curl --no-keepalive --proxy socks5://localhost:$proxy_port https://httpbin.org/ip;
else
  # socks5h
  curl --no-keepalive --proxy socks5h://localhost:$proxy_port https://httpbin.org/ip;
fi

kill $socks5_pid