Shell正则表达式验证IP地址

本机多个IP

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代码如下:

ifconfig | awk /inet/{print $2} | awk -F: {print $2} 

首先，先用这个来着

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代码如下:

CheckIPAddress()       

{

        echo $1 > /tmp/tmpserverip

echo $1 |grep “^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$” > /dev/null

        if [ $? = 1 ];    then

                return 1

        else

a=$(cut -d. -f1 /tmp/tmpserverip)

                b=$(cut -d. -f2 /tmp/tmpserverip)

                c=$(cut -d. -f3 /tmp/tmpserverip)

d=$(cut -d. -f4 /tmp/tmpserverip)

                for loop in $a $b $c $d

                do

                        if [ $loop -ge 255 ] || [ $loop -le 0 ]; then

                                return 2

                        fi

                done

        fi

        return 0

}

最初的时候，参考过下面的这些

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代码如下:

grep “^([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).$”

输入ip，检查其是否满足的ip书写规范，即不能大于255，不能有字母，和其他标点，参考网上的，自己搞了个如下，做个标记！@

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代码如下:

echo -n Enter the Server-ip:

        read BISSip

        echo $BISSip > /tmp/tmpserverip

echo $BISSip|grep “^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$” > /dev/null

        num=$?

if [ $num = 1 ]

        then

                echo error ip,please enter correct

        else

  {

        a=$(cut -d. -f1 /tmp/tmpserverip)

b=$(cut -d. -f2 /tmp/tmpserverip)

        c=$(cut -d. -f3 /tmp/tmpserverip)

        d=$(cut -d. -f4 /tmp/tmpserverip)

        {

if [ $a -ge 255 ]||[ $a -le 0 ]

                then

                        echo a:error ip

                else

                        echo 1 > /tmp/jack

                 fi

        }

        {

                if [ $b -ge 255 ]||[ $b -lt 0 ]

                then

echo b:error ip

        else

                        echo 1 >>/tmp/jack

        fi

        }

        { if [ $c -ge 255 ]||[ $c -lt 0 ]

                 then

                         echo c:error ip

                else

echo 1 >>/tmp/jack

                    fi

         }

         { if [ $d -ge 255 ]||[ $d -le 0 ]

                then

                        echo d:error ip

                else

                        echo 1 >> /tmp/jack

                fi

         }