Methods for using Python to detect IP and unused IP for a segment

Borrowed from the predecessors of the blog, and then added a lot of things.

which uses the Subprocess module.

>>> Import subprocess

>>> p = subprocess. Popen (' Df-h ', stdin=subprocess. Pipe,stdout=subprocess. Pipe,stderr=subprocess. Pipe,shell=true)

#获取命令执行结果的返回码, through the Wait () function

>>> p.wait ()

0

#获取命令输出结果 (standard output), via the Read () method

>>> P.stdout.read ()

' Filesystem Size used Avail use% mounted on\n/dev/sda1 18G 11G 5.8G 65%/\ntmpfs 495M 0 495M 0%/dev/shm\n '

#获取命令错误输出结果, through the Read () method

>>> P.stderr.read ()

''

#为空, indicating no error output

#获取错误输出

<subprocess. Popen Object at 0x7f267528dbd0>

>>> p = subprocess. Popen (' Ls/etc/password ', stdin=subprocess. Pipe,stdout=subprocess. Pipe,stderr=subprocess. Pipe,shell=true,close_fds=true)

>>> P.stderr.read ()

' Ls:cannot access/etc/password:no such file or directory\n '

Other ways to get error output are: Read (), ReadLine (), ReadLines (), close (), write (), and Writelines ().

#!/usr/bin/env python

#_ *_ Coding:utf8 _*_

# by Lijiajun

Import Re,subprocess,os,sys

net_region= ' 192.168.3 '

Print ("#########################################################")

Print ("#此脚本主要基于ping, test for a network segment used IP and unused IP #")

Print ("#分别将其保存到/tmp/alive_ip.txt #")

Print ("#以及/tmp/dead_ip.txt #")

Print ("#########################################################")

Print ("")

If Os.path.isfile ("/tmp/alive_ip.txt"):

Os.popen ("Mv/tmp/alive_ip.txt/tmp/alive_ip.txt.old")

Print "Can see the used IP in this file:/tmp/alive_ip.txt"

If Os.path.isfile ("/tmp/dead_ip.txt"):

Os.popen ("Mv/tmp/dead_ip.txt/tmp/dead_ip.txt.old")

Print "Can see the unused IP in this file:/tmp/dead_ip.txt"

Print ("")

Dead_ip=0

Alive_ip=0

def check_alive (ip,count,timeout):

Global ALIVE_IP

Global DEAD_IP

Cmd= ' ping-c%d-w%d%s '% (COUNT,TIMEOUT,IP)

P=subprocess. Popen (CMD,

Stdin=subprocess. PIPE,

Stdout=subprocess. PIPE,

Stderr=subprocess. PIPE,

Shell=true)

Result=p.stdout.read ()

Regx=re.findall (' 100% packet loss ', result)

If Len (REGX) ==0:

Print ("\033[1;32;40m%s is up \033[0m")% (IP)

F=file ('/tmp/alive_ip.txt ', ' a ')

F.write ('%s\n '%ip)

F.close ()

Alive_ip=alive_ip+1

Print "Alive_ip count is%d"% alive_ip

Return ALIVE_IP

Else

Print "\033[31m%s is down\033[0m"% (IP)

F=file ('/tmp/dead_ip.txt ', ' a ')

F.write ('%s\n '%ip)

F.close ()

Dead_ip=dead_ip+1

Print "Dead_ip count is%d"% dead_ip

Return DEAD_IP

If name== "main":

#f =file ('/tmp/iplist.txt ')

For I in Range (1,255):

ip= '%s.%s '% (net_region,i)

Print IP

Check_alive (ip,1,1)

Print ("")

Print "Final dead_ip count is%d"% dead_ip

Print "Final alived_ip count is%d"% alive_ip