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Using AWK in IF evaluation in KSH

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# 1  
Old 06-04-2010
Using AWK in IF evaluation in KSH
Hi -

I have an expression that evaluates to "Alive" or some other condition. e.g. if I run :-

Code:
awk -F \| '{gsub(/[[:space:]]*/,"",$4); print $4 }'

then the output is "Alive".

I want to be able to test this as the result may be some other condition other than "Alive". I have tried the following which doesn't work. Can someone tell me what is wrong please ?

Code:
if [[ `awk -F \| '{gsub(/[[:space:]]*/,"",$4); print $4 }'` != "Alive" ]]; then

Thanks in advance.
# 2  
Old 06-04-2010
The way your code is written it must read from stdin. I think we need to see a few lines above...

What do you mean 'does not work' - what is your input and expected output
# 3  
Old 06-04-2010
OK I have an input file (e.g. imput.txt) which looks something like :-

Code:
Server 1  |  Group 1  |   34586   |   Alive
Server 2  |  Group 1  |   92876   |   Alive
Server 1  |  Group 2  |   87321   |   Alive
Server 2  |  Group 2  |   18763   |   Alive


Then I do :-

Code:
while read line
do
   if [[ `awk -F \| '{gsub(/[[:space:]]*/,"",$4); print $4 }'` != "Alive" ]]; then
       print "Server :" `awk -F\| '{print $1}'` " is " `awk -F\| '{print $4}'`
   fi
done < input.txt

Now this doesn't work in that even though all servers are "Alive", the code still enters the if statement.

Thanks for your help.
# 4  
Old 06-04-2010
You can do the job with 1 awk command:
Code:
awk -F \| '{gsub(/[[:space:]]*/,"",$4)}
$4 != "Alive" {print "Server : " $1 " is " $4}
' input.txt

# 5  
Old 06-04-2010
Genius - thanks very much. Exactly what's needed.
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