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Awk - find string, search lines below string for other strings

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# 1  
Old 03-29-2011
Awk - find string, search lines below string for other strings
What's the easiest way to search a file for a specific string and then look for other instances after that? I want to search for all Virtual Hosts and print out the Server Name and Document Root (if it has that info), while discarding the rest of the info.

Basically my file looks like this:
Code:
...
<VirtualHost *:>
        ServerName server.name1.com
        ServerAlias svrname
        Redirect Permanent / http://www.sitename1.gov
# Disable HTTP TRACE Support (see http://www.kb.cert.org/vuls/id/867593)
        RewriteEngine On
        RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
        RewriteRule .* - [F]
</VirtualHost>

<VirtualHost *:>
        ServerName www.servername2
        ServerAlias srvname2
        ServerAlias srvname.2.com
        DocumentRoot /location/of/document/root
        DirectoryIndex index.shtml
        ScriptAlias /cgi-bin/ /tst/cgi-bin/
        ErrorDocument 403 http://www.error.com/errors/error403.html
#       ErrorDocument 404 http://www.error.com/errors/error404.html
# Disable HTTP TRACE Support (see http://www.kb.cert.org/vuls/id/867593)
        RewriteEngine On
        RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
        RewriteRule .* - [F]
</VirtualHost>
...

And I want it to look like this:
Code:
...
<VirtualHost *:>
                 ServerName server.name1.com
<VirtualHost *:>
                 ServerName www.servername2
                 DocumentRoot /location/of/document/root
...

There a simple or not so simple awk script for this? Thanks.
# 2  
Old 03-29-2011
If you're on Solaris, use gawk, nawk or /usr/xpg4/bin/awk.

Code:
awk 'END {
    if (ok) print r
  }
/VirtualHost/ {
  if (ok) print r
  r = $0; ok = x  
  }
/ServerName|DocumentRoot/ { 
  r = r RS $0; ok++  
  }' infile

This User Gave Thanks to radoulov For This Post:
Mbohmer
# 3  
Old 03-29-2011
Code:
grep -E 'VirtualHost|ServerName|DocumentRoot' *

# 4  
Old 03-29-2011
Code:
awk '/<VirtualHost \*:>|ServerName|DocumentRoot/{print}' file
<VirtualHost *:>
        ServerName server.name1.com
<VirtualHost *:>
        ServerName www.servername2
        DocumentRoot /location/of/document/root

# 5  
Old 03-29-2011
Quote:
Originally Posted by radoulov
If you're on Solaris, use gawk, nawk or /usr/xpg4/bin/awk.

Code:
awk 'END {
    if (ok) print r
  }
/VirtualHost/ {
  if (ok) print r
  r = $0; ok = x  
  }
/ServerName|DocumentRoot/ { 
  r = r RS $0; ok++  
  }' infile

Works like a charm. Thanks a bunch!
# 6  
Old 03-29-2011
Quote:
Originally Posted by ctsgnb
Code:
grep -E 'VirtualHost|ServerName|DocumentRoot' *

The above command will output the lines containing the string VirtualHost regardless of the presence of ServerName and DocumentRoot directives.
# 7  
Old 03-29-2011
Ooops you true.... i didn't see he wanted to discard those not having these ServerName and DocumentRoot
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