Socat Control

socat_control.sh

#!/bin/bash

SOCKS_PID_FILE="/tmp/socat.pid"

start_socat() {
  socat TCP4-LISTEN:1080,fork SOCKS4A:localhost:www.example.com:80,socksport=1080 &
  echo $! > "$SOCKS_PID_FILE"
  echo "socat started with PID $!"
}

stop_socat() {
  if [[ -f "$SOCKS_PID_FILE" ]]; then
    pid=$(cat "$SOCKS_PID_FILE")
    kill "$pid"
    rm "$SOCKS_PID_FILE"
    echo "socat stopped (PID $pid)"
  else
    echo "socat is not running"
  fi
}

status_socat() {
  if [[ -f "$SOCKS_PID_FILE" ]]; then
    pid=$(cat "$SOCKS_PID_FILE")
    if ps -p "$pid" > /dev/null; then
      echo "socat is running (PID $pid)"
    else
      echo "socat is not running"
      rm "$SOCKS_PID_FILE"
    fi
  else
    echo "socat is not running"
  fi
}

case "$1" in
  start)
    start_socat
    ;;
  stop)
    stop_socat
    ;;
  status)
    status_socat
    ;;
  *)
    echo "Usage: $0 {start|stop|status}"
    exit 1
    ;;
esac