Powershell和regex用于解析配置和显示接口，配置了ospf

Question

请帮帮忙。我要显示输出

interface vlan1 is not configured with ospf
interface vlan3 is configured with ospf
interface vlan7 is configured with ospf

但是我在运行下面的脚本时得到的输出是

interface vlan1 interface vlan3 interface vlan7 is configured with ospf

$interface = select-string -path c:\doc\config.txt -pattern "interface\vlan\d{1,3} -context 0, 3

$ospf = Select-string -inputobject $interface -pattern "ip ospf message-digest.*" | % {$_.matches.value}
if ($ospf -ne $null)
{
   $int = $ interface | select -expandproperty line #don't want to show line#
   write-host "$int is configured with ospf"
}
else
  {
    $int = $ interface | select -expandproperty line #don't want to show line#
     Write-host "$int is not configured with ospf"
  }

interface Vlan1
 no ip address
 shutdown
!
interface Vlan3
 ip ospf message-digest-key 100 md5 7 aa93naf
!
interface Vlan7
 standby 38 preempt
 ip ospf message-digest-key 100 md5 7 asf9394

Answer 1

你的方法太复杂了，

1. 将配置文件拆分为由!分隔的块(接口)，
2. 检查ospf字符串的每个接口，
3. 选择当前接口的第一行并输出测试结果。

## Q:\Test\2019\03\08\SO_55056710.ps1
$interfaces = (Get-Content .\config.txt -Raw) -split "!`r?`n"

foreach($interface in $interfaces){
    if ($interface -match "ip ospf message-digest"){
        $ospf = "is"} else {$ospf = "is not"}
    "{0} {1} configured with ospf" -f ($interface -split "`r?`n")[0],$ospf
}

样本输出：

> Q:\Test\2019\03\08\SO_55056710.ps1
interface Vlan1 is not configured with ospf
interface Vlan3 is configured with ospf
interface Vlan7 is configured with ospf