0

我有一个小文件：

    # Format
    # <iface_name>,<ip_addr>,<ip_netmask>,<broadcast>,<eth_addr>,<status>,<obtaining_method>

    eth0,192.168.0.11,255.255.255.0,192.168.0.255,4A:DD:00:00:05:00,up,static
    lv0,172.20.8.12,255.255.248.0,172.20.15.255,4A:DD:00:FF:15:01,down,static
    #lv0:0,172.20.16.12,255.255.248.0,172.20.23.255,4A:DD:00:FF:15:01,down,static
    #lv0:1,172.20.24.12,255.255.248.0,172.20.31.255,4A:DD:00:FF:15:01,down,static
    lv1,172.21.8.11,255.255.248.0,172.21.15.255,4A:DD:00:FF:15:02,down,dhcp
    #lv1:0,172.21.16.1,255.255.248.0,172.21.23.255,4A:DD:00:FF:15:02,down,static
    #lv1:1,172.21.24.1,255.255.248.0,172.21.31.255,4A:DD:00:FF:15:02,down,static
    mv0,10.100.0.1,255.255.255.0,10.100.0.255,40:FD:00:00:01:0A,up,static
    lp0,172.22.0.12,255.255.255.0,172.22.0.255,4A:DD:00:FF:15:04,down,static
    lp1,172.22.1.12,255.255.255.0,172.22.1.255,4A:DD:00:FF:15:05,down,static
    dummy0,192.168.111.100,255.255.255.0,192.168.111.255,00:00:00:00:00:00,down,static

我有一个想法，在一个周期内获取所有接口参数，并做了这个表达式：

    #!/bin/sh

    SPATH=/mnt/dcu/tmp/

    for INTERFACE in $(awk -F\, '/^[^#]/ {print $1}' $SPATH/ifaces); do
        INTERFACE_SETTINGS=$(awk -F\, '$1 ~ interface_name {print $2,$3,$4,$5,$6,$7}' interface_name=$INTERFACE $SPATH/ifaces)
        set $INTERFACE_SETTINGS
        IPADDR=$1
        NETMASK=$2
        BROADCAST=$3
        MACADDR=$4
        STATE=$5
        METHOD=$6

        sed -r -i -e "/$INTERFACE/s/^([^,]*,)([^,]*,)([^,]*,)([^,]*,)([^,]*,)([^,]*,)([^,]*)$/$INTERFACE,$IPADDR,$NETMASK,$BROADCAST,$MACADDR,$STATE,$METHOD/" /etc/network/ifaces
    done

但它执行以下操作：

     # Format
     # <iface_name>,<ip_addr>,<ip_netmask>,<broadcast>,<eth_addr>,<status>,<obtaining_method>

     eth0,192.168.0.11,255.255.255.0,192.168.0.255,4A:DD:00:00:05:00,up,static
     lv0,172.20.8.12,255.255.248.0,172.20.15.255,4A:DD:00:FF:15:01,down,static
     lv0,172.20.8.12,255.255.248.0,172.20.15.255,4A:DD:00:FF:15:01,down,static
     lv0,172.20.8.12,255.255.248.0,172.20.15.255,4A:DD:00:FF:15:01,down,static
     lv1,172.21.8.11,255.255.248.0,172.21.15.255,4A:DD:00:FF:15:02,down,dhcp
     lv1,172.21.8.11,255.255.248.0,172.21.15.255,4A:DD:00:FF:15:02,down,dhcp
     lv1,172.21.8.11,255.255.248.0,172.21.15.255,4A:DD:00:FF:15:02,down,dhcp
     mv0,10.100.0.1,255.255.255.0,10.100.0.255,40:FD:00:00:01:0A,up,static
     lp0,172.22.0.12,255.255.255.0,172.22.0.255,4A:DD:00:FF:15:04,down,static
     lp1,172.22.1.12,255.255.255.0,172.22.1.255,4A:DD:00:FF:15:05,down,static
     dummy0,192.168.111.100,255.255.255.0,192.168.111.255,00:00:00:00:00:00,down,static

它会得到更改和已评论的接口。

我试图为它做任何例外 - 但它不适用于一行：

    awk -F\, '{ if ($1 !~ /[#]|^$/interface_name ) {print $2,$3,$4,$5,$6,$7} }' interface_name=lv0 /etc/network/ifaces
    192.168.0.1 255.255.255.0 192.168.0.255 4A:DD:00:00:01:0A up static
    172.20.8.1 255.255.248.0 172.20.15.255 4A:DD:00:FF:15:01 up static
    172.21.8.1 255.255.248.0 172.21.15.255 4A:DD:00:FF:15:02 down static
    10.10.0.1 255.255.255.0 10.10.0.255 40:FD:00:00:01:0A down static
    172.22.0.1 255.255.255.0 172.22.0.255 4A:DD:00:FF:15:04 down static
    172.22.1.1 255.255.255.0 172.22.1.255 4A:DD:00:FF:15:05 down static
    192.168.111.111 255.255.255.0 192.168.111.255 00:00:00:00:00:00 down static

我怎么能为我的案子做呢？

先感谢您。

4

3 回答 3

2

您已经在使用 awk 那么为什么要添加一个 shell 循环和一个 sed 命令呢？

看起来您要做的只是将 /etc/network/ifaces 中的值替换为具有相同接口名称的 $SPATH/ifaces 中的值。如果是这样，整个事情就是：

awk -F, 'NR==FNR{a[$1]=$0; next} {print ($1 in a ? a[$1] : $0}' $SPATH/ifaces /etc/network/ifaces > tmp && mv tmp /etc/network/ifaces

看起来注释行和空白行不会成为问题，因为它们只会在无关紧要的文件之间匹配（空白为空白，每个文件中的前几行相同，并且没有注释掉“真正的”数据行在你的第二个文件中），但如果他们这样做了，那么在解析第一个文件时只需调整它以排除它们：

awk -F, 'NR==FNR{if (!/^(#|$)/) a[$1]=$0; next} {print ($1 in a ? a[$1] : $0}' $SPATH/ifaces /etc/network/ifaces > tmp && mv tmp /etc/network/ifaces
于 2013-02-16T12:47:32.730 回答
1

awk要根据变量匹配模式bash，您可以执行以下操作：

awk -v interface_name=$inter '$0 ~ interface_name {print $0}' inputfile

此命令将 bash 变量传递$inter给awk变量interface_name（注意-v选项），然后过滤变量中包含字符串的所有行（带有$0 ~ interface_name）

于 2013-02-16T09:35:41.063 回答
0

已经这样做了，但非常感谢用户user000001

    awk -F\, '{ if ($1 !~ /[#]|^$/interface_name  && $1 ~ interface_name) {print $2,$3,$4,$5,$6,$7} }' interface_name=lv0 /etc/network/ifaces
    172.20.8.1 255.255.248.0 172.20.15.255 4A:DD:00:FF:15:01 up static
于 2013-02-16T10:32:55.753 回答