TCP listen port discovery for Zabbix LLD

tcp_listen_port_discovery.sh

#!/usr/bin/env bash
PROCNAME="$1"
PORT_LIST=$(ss -nap|grep LISTEN|grep \"${PROCNAME}\" \
  |awk '{ print $4 }'|sed -e 's/.*://g'|sort|uniq)
[ -z "${PORT_LIST}" ] && echo ZBX_NOTSUPPORTED && exit 1

{
  echo "{"
  echo "  \"data\":["
  for PORT in ${PORT_LIST}; do
    echo "  {"
    echo "    \"{#LISTEN_PORT}\":\"${PORT}\""
    echo "  },"
  done | sed -e '$d'
  echo "  }"
  echo "  ]"
  echo "}"
}