UNIX shell获取IP和修改IP

UNIX shell获取IP和修改IP#！/bin/ksh#全局变量
#已配置信息的网卡个数
ETHNUM=0
#网卡名称信息，多个网卡用#符号分隔
ETHS=""
#网卡IP/掩码/默认网关信息，用:符号分隔，多个网卡用#符号分隔
ETHINFO=""
#网卡名称信息，用数组存储
ETHSArray[0]=""
#网卡IP/掩码/默认网关信息，用数组存储
ETHINFOArray[0]=""
#修改IP时原IP所在网卡在数组中的索引
ETHINDEX=0
function getIP
{
typeset ethList="";
typeset ethaddr="";
typeset ethmask="";
typeset gateway="";
typeset ethinfo="";
# 获取所有网卡信息
ethList=`ifconfig -a | grep "eth" | awk "{print $1}"`
# 循环所有网卡
for eth in ${ethList}
do
# 获取网卡IP地址
ethaddr=`ifconfig ${eth} | grep "inet addr:"| awk "{print $2}" | awk -F : "{print $2}"`
# 网卡配置了IP地址
if [ "-$ethaddr" ！= "-" ]
then
# 获取网卡掩码
ethmask=`ifconfig ${eth} | grep "inet addr:"| awk "{print $4}" | awk -F : "{print $2}"`
# 获取网卡默认网关
# gateway=`route ${eth}| grep default.*UG.*$eth | awk "{print $2}"`
gateway=`route | grep default.*UG.*$eth | awk "{print $2}"`
# 将该网卡的信息拼成字符串
ethinfo="${ethaddr}:${ethmask}:${gateway}"

ETHSArray[$ETHNUM]="$eth"
ETHINFOArray[$ETHNUM]="$ethinfo"
ETHNUM=`expr $ETHNUM + 1`

# ETHS为空字符串
if [ "-$ETHS" == "-" ]
then
ETHS="${eth}"
else
ETHS="${ETHS}#${eth}"
fi

# ETHINFO为空字符串
if [ "-$ETHINFO" == "-" ]
then
ETHINFO="${ethinfo}"
else
ETHINFO="${ETHINFO}#${ethinfo}"
fi

fi

done

return 0
}function modifyIP
{
# 保证输入4个参数
if [ $# -ne 4 ]; then
echo "The parameters is not 4！"
return 1
fi

typeset oldIP=$1
typeset newIP=$2
typeset newmask=$3
typeset newgw=$4

# 获取当前网卡信息
getIP

# 判断该原IP是否存在
get_eth_of_IP $oldIP
# 原IP不存在，返回1
if [ $？ -ne 0 ]; then
echo "The old IP $oldIP is not exist."
return 1
fi

typeset eth="${ETHSArray[$ETHINDEX]}"
typeset ethinfo="${ETHINFOArray[$ETHINDEX]}"
typeset ethaddr=`echo $ethinfo | awk -F: "{print $1}"`
typeset ethmask=`echo $ethinfo | awk -F: "{print $2}"`
typeset ethgw=`echo $ethinfo | awk -F: "{print $3}"`

# 即时生效方式修改IP
echo "ifconfig $eth $newIP netmask $newmask"
ifconfig $eth $newIP netmask $newmask
if [ "$？" -ne 0 ]; then
echo "Modify old IP $oldIP to new IP $newIP failed."
return 1
fi

# 永久生效方式修改IP
sed "s/$oldIP/$newIP/" /etc/sysconfig/network/ifcfg-$eth > /tmp/ifcfgtemp
sed "s/$ethmask/$newmask/" /tmp/ifcfgtemp > /etc/sysconfig/network/ifcfg-$eth
rm /tmp/ifcfgtemp

#即时生效方式修改网关
route del default
echo "route del default"
route add default gw $newgw dev $eth
echo "route add default gw $newgw dev $eth"

# 永久生效方式修改网关
sed "s/$ethgw/$newgw/" /etc/sysconfig/network/routes > /tmp/routetemp
mv /tmp/routetemp /etc/sysconfig/network/routes

return 0
}
###############################################################
#函数名称：get_eth_of_IP
#功能：获取IP所在网卡的索引
#输入参数：IP
#返回值：1 没有设置该IP的网卡，0 设置该IP的网卡所在索引。
# 2 传入参数错误
# ETHINDEX值为索引位置
#
###############################################################
function get_eth_of_IP
{
# 保证输入一个参数
if [ $# -ne 1 ]; then
echo "The parameters is not 1！"
return 2
fi

typeset oldIP=$1
typeset ethaddr=""
typeset ethinfo=""
typeset index=0
while [ $index -lt ${#ETHSArray[@]} ]
do
ethinfo="${ETHINFOArray[index]}"
ethaddr=`echo $ethinfo | awk -F: "{print $1}"`
if [ "${ethaddr}" == "${oldIP}" ];then
ETHINDEX=$index
return 0
fi
index=`expr $index + 1`
done
return 1
}

if [ $# -eq 0 ];then
getIP
echo "eas_modify_ip_result = [$ETHINFO]"
#echo $ETHINFO
#echo "]"
exit 0
fi
case $1 in
getip）
getIP
echo "eas_modify_ip_result = ["
echo $ETHINFO
echo "]"
exit 0
;;
modify）
modifyIP $2 $3 $4 $5
exit 0
;;
esac
echo "The parameters are invalid."
exit 0
;;Linux Shell参数替换 http://www.linuxidc.com/Linux/2013-06/85356.htmShell for参数 http://www.linuxidc.com/Linux/2013-07/87335.htmLinux/Unix Shell 参数传递到SQL脚本 http://www.linuxidc.com/Linux/2013-03/80568.htmShell脚本中参数传递方法介绍 http://www.linuxidc.com/Linux/2012-08/69155.htmShell脚本传递命令行参数 http://www.linuxidc.com/Linux/2012-01/52192.htm本文永久更新链接地址：http://www.linuxidc.com/Linux/2014-08/105212.htm