python和shell实现的校验IP地址合法性脚本分享

 
[root@yang python]# vi check_ip.py
#!/usr/bin/python
import os,sys
def check_ip(ipaddr):
        import sys
        addr=ipaddr.strip().split('.')   #切割IP地址为一个列表
        #print addr
        if len(addr) != 4:   #切割后列表必须有4个参数
                print "check ip address failed!"
                sys.exit()
        for i in range(4):
                try:
                        addr[i]=int(addr[i])   #每个参数必须为数字，否则校验失败
                except:
                        print "check ip address failed!"
                        sys.exit()
                if addr[i]<=255 and addr[i]>=0:    #每个参数值必须在0-255之间
                        pass
                else:
                        print "check ip address failed!"
                        sys.exit()
                i+=1
        else:
                print "check ip address success!"
if  len(sys.argv)!=2:  #传参加本身长度必须为2
        print "Example: %s 10.0.0.1 "%sys.argv[0]
        sys.exit()
else:
        check_ip(sys.argv[1])   #满足条件调用校验IP函数

[root@yang python]# vi check_ip.sh
#!/usr/bin/sh
CheckIPAddr()
{
echo $1|grep "^[0-9]\{1,3\}\.\([0-9]\{1,3\}\.\)\{2\}[0-9]\{1,3\}$" > /dev/null;
#IP地址必须为全数字
        if [ $? -ne 0 ]
        then
                return 1
        fi
        ipaddr=$1
        a=`echo $ipaddr|awk -F . '{print $1}'`   #以"."分隔，取出每个列的值
        b=`echo $ipaddr|awk -F . '{print $2}'`
        c=`echo $ipaddr|awk -F . '{print $3}'`
        d=`echo $ipaddr|awk -F . '{print $4}'`
        for num in $a $b $c $d
        do
                if [ $num -gt 255 ] || [ $num -lt 0 ]     #每个数值必须在0-255之间
                then
                        return 1
                fi
        done
                return 0
}
if [ $# -ne 1 ];then            #判断传参数量
        echo "Usage: $0 ipaddress."
        exit
else
CheckIPAddr $1
fi