Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

rbgnow_110245's avatar
rbgnow_110245
Icon for Nimbostratus rankNimbostratus
Jan 16, 2009

Get multiple fields from string

How to get multiple fields from a string variable.     Example:   echo "a.b.c.d.e.f"|cut -d. -f2,4-6   b.d.e.f     trying to find the similar feature using getfield lik...
application delivery
dev
devops
irules
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Jan 19, 2009
You could use getfield for each field, but I think scan would be more efficient. Here are a few examples: 

 
 when RULE_INIT { 
  
    set ip 11.22.33.44 
    scan $ip {%d.%d.%d.%d} a b c d 
    log local0. "$a, $b, $c, $d" 
  
    set str "e f g h" 
    scan $str {%s %s %s %s} a b c d 
    log local0. "$a, $b, $c, $d" 
  
    set str "i 2 k 4" 
    scan $str {%s %s %s %s} a b c d 
    log local0. "$a, $b, $c, $d" 
 }

And the log output:

Rule : 11, 22, 33, 44

Rule : e, f, g, h

Rule : i, 2, k, 4

Aaron