[CentOS] awk awk

Definitely have little to no understanding of awk but…

/./ suppresses empty lines (records in awk speak)

the gsub looks interesting but your code just tosses syntax errors

and yes Les, the >2 /dev/null definitely redirected the awk squawk to where it belonged

Craig

On Dec 6, 2012, at 1:34 PM, m.roth at 5-cent.us wrote:

> You rang?
> 
> Craig White wrote:
>> a little out of my comfort zone and have practically gotten what I want
>> but awk seems determined to send a message via std error which is
>> problematic and annoying. Basically trying to get a list of virtual host
>> names from nginx config files like this:
>> 
>> $ awk -F" " '/./ { if ( match ( "^server_name$", $2 ) ) print $1 }'
>> /opt/nginx/sites/*.conf \
>> | grep -v server_name | grep -v ';' | grep -v '}'
> 
> Why are you doing all that piping and grepping? And the -F" " confuses
> me...oh, I see. First, whitespace is the default field separator in awk.
> Then, are you asking if there's a line with a "." in it, or just any
> non-whitespace? If the latter... mmm, I see, you *really* don't understand
> awk.
> 
> awk -f '{if ( $1 ~ /server_name/ ) {\
>            server = $2;\
>            gsub(/;|}/,"",server);\
>            print server;
>         }
>        }'
> <snip>
>       mark
> 
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-- 
Craig White ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ craig.white at ttiltd.com
1.800.869.6908 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ www.ttiassessments.com 

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