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Position of a string using AWK

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# 1  
Old 03-04-2011
Position of a string using AWK
I'm plowing through a bunch of text (and I have to use awk) and need to identify which position a certain string is in. Consider the two lines...
Code:
UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1372  Metric:1
UP LOOPBACK RUNNING  MTU:16436  Metric:1

I can identify the line by searching for MTU:. But I want to know which position the MTU string is in. Positions 6 and 4 in the two cases above.

Is there a quick trick for this or should I fight to write the script in perl?
Last edited by Scott; 03-04-2011 at 08:07 PM.. Reason: Added code tags
# 2  
Old 03-04-2011
A for-loop should cover it.

Code:
$ awk '{for(i=1;i<=NF;i++) if( $i ~ /^MTU:/ ) print i}' file
6
4

# 3  
Old 03-04-2011
Code:
awk '/MTU:/{print NR;NR=0}' RS=" +"

# 4  
Old 03-06-2011
Note: Only gawk and mawk can handle regex RS.
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