python2: 快速获取机器网卡IP和可用的端口

import socket 
import os 
import sys 
import fcntl 
import struct 
def get_ip_address(ifname): 
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
 return socket.inet_ntoa(fcntl.ioctl( 
        s.fileno(), 
 0x8915, # SIOCGIFADDR 
 struct.pack('256s', ifname[:15]) 
 )[20:24]) 
ttype = sys.argv[1] 
if ttype == "ip": 
    ip = get_ip_address(os.getenv("eth", "eth1")) 
 print(ip) 
else: 
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    s.bind(('', 0)) 
    addr = s.getsockname() 
 print(addr[1]) 
    s.close() 

ip=`python getipport.py ip` 
echo $ip 
port=`python getipport.py port` 
echo $port 
export listen_ip=$ip 
export listen_port=$port 
exec ./myapp 2>>./stderr/stderr.log