Add missing ServerName directive to httpd.conf file using sed

fizzistuff · 04-11-2013, 03:35 PM

I have the following virtual hosts in httpd.conf file

Code:

.... other lines of httpd.conf

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

.... other lines of httpd.conf

I'm trying to add "ServerName abc.com" to every virtual host which doesn't have a ServerName already setup.

I was trying to do it in sed, and I'm not getting anywhere .. any help ?

This is what I have so far ...

Code:

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

   }
  }
}' httpd.conf

danielbmartin · 04-11-2013, 09:09 PM

[QUOTE=fizzistuff;4929964]Your sample input file contains this ...

Code:

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

Should this group of records terminate with </VirtualHost> just as the others do?

Daniel B. Martin

danielbmartin · 04-11-2013, 09:37 PM

Quote:

Originally Posted by fizzistuff

I was trying to do it in sed, and I'm not getting anywhere .. any help ?

I find it easier to perform this transformation in small steps.
1) Reformat the input file so each "<VirtualHost *:80>" block of lines becomes one line.
2) If any line lacks a ServerName, plug in the default.
3) Reformat the file to look like the original.

With this InFile ...

Code:

    <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
   could be any line
   could be any line
    ServerName zzz.com
    could be any line
    could be any line
    could be any line
    </VirtualHost>

... this code ...

Code:

 sed 's/$/~/' $InFile                             \
|paste -d"\0 " -s                                 \
|sed 's|</VirtualHost>~|</VirtualHost>\n|g'       \
|awk '{if ($0~"<VirtualHost" && $0!~"ServerName")  
   sub(">",">~     ServerName ABC.COM")} {print}' \
|sed 's/~/\n/g'                                   \
> $OutFile

...produced this OutFile ...

Code:

   <VirtualHost *:80>
     ServerName ABC.COM
    ## could be comments
     could be any line
    could be any line
     could be any line
    </VirtualHost>
 
    <VirtualHost *:80>
     ServerName ABC.COM
        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
   could be any line
    could be any line
    ServerName zzz.com
     could be any line
    could be any line
     could be any line
    </VirtualHost>

Daniel B. Martin