Awk 脚本删除某些块模式

Question

我有以下包含很多条目的文件：

[...]

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next
edit "ip_address_3"
    set uuid c1b62e20-9fef-51ee-5915-14502d40552e
    set associated-interface "interface2"
    set subnet 10.0.0.3 255.255.255.255
next

我想使用 awk 脚本删除所有不包含的块

set associated-interface "interface1" 所以最终结果应该是

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next

我尝试过这样的事情

awk '/edit/, /next/ {if ($0 ~ /set associated interface1/) {print $0}}' address.fgt 但输出仅包含以下行：

set associated interface1
set associated interface1

相反，我想要全部阻止。 有什么提示吗？

Answer 1

您可以使用这个

gnu-awk

解决方案：

awk -v RS='\nnext\n' '{ORS = RT} /set associated-interface "interface1"/' file

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next

详情：

• RS='\nnext\n'

   将输入记录分隔符设置为 

  next

   两边换行

• ORS = RT

  ：设置输出记录分隔符与输入记录分隔符相同

• /set associated-interface "interface1"/

   打印包含该子字符串的每条记录

---

第二个解决方案（适用于任何 awk 版本）：

awk '/^edit / {
   rec = 1
   s = $0
   next
}
rec {
   s = s ORS $0
}
/^next/ {
   if (s ~ /set associated-interface "interface1"/)
      print s
   rec = 0
}' file

edit "ip_address_1"
    set uuid 8b6d9bd0-9fe7-51ee-d54d-d904bfc9a7e1
    set associated-interface "interface1"
    set subnet 10.0.0.1 255.255.255.255
next
edit "ip_address_2"
    set uuid a3465e68-9fe7-51ee-cf95-96b35ab0532e
    set associated-interface "interface1"
    set subnet 10.0.0.2 255.255.255.255
next