linux - 使用 sed 将缺少的 ServerName 添加到 httpd.conf 文件

Question

我在 httpd.conf 文件中有以下虚拟主机

    <VirtualHost *:80>
    ## could be comments
    could be any line
    could be any line
    could be any line
    </VirtualHost>

    <VirtualHost *:80>
       could be any line
    ## could be comments
    could be any line
    could be any line
    could be any line
    could be any line
    could be any line
    </VirtualHost>

    <VirtualHost *:80>
## may have comments
    ServerName ppp.com
        could be any line
    could be any line
    could be any line
  </VirtualHost>

    <VirtualHost *:443>
   ## could be empty
    ServerName zzz.com
    could be any line
    could be any line
    could be any line
    </VirtualHost>

我正在尝试将“ServerName abc.com”添加到每个尚未设置 ServerName 的虚拟主机。

我试图在 sed 中完成它，但我没有取得任何进展......有什么帮助吗？

这就是我目前所拥有的...

sed '/^[ \t]*<VirtualHost/,/^[ \t]*<\/VirtualHost/{
/^ServerName/!{
   /<VirtualHost/{
     /^/a\ServerName abc.com

   }
  }
}' httpd.conf

Answer 1

使用 sed:

sed '/<VirtualHost/{
       :a N;/<\/VirtualHost>/!b a;
       /ServerName/!s!\(</VirtualHost>\)!ServerName abc.com\n\1!
}' input

我不认为 awk 在这个特定问题上比 sed 有任何优势。