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Full Discussion: While loop with awk issue
Top Forums Shell Programming and Scripting While loop with awk issue Post 302571804 by Stephan on Tuesday 8th of November 2011 09:33:53 AM
Old 11-08-2011
While loop with awk issue

Hi folks.

I am trying to use a while loop along with awk to get the colums where 2 specific words are found.

Here is the output of the command i run where i need to pull the column numbers if specific words are found:

Code:
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N         512   4096  1048576   1049996  1048065                0         1048065              0             N  DATA/

What i am trying to do, is have the loop "check" each columns until it finds Total_MB and set a TOTALCOL=7 (as this is the 7th column) and then continue through its loop until it finds Free_MB and set a FREECOL=8 variable that i can use later in the script...When the loop reaches then end, i was guessing an empty return, it would exit the loop and continue...

Here is what i have so for, but it does not work as expected. I may be completely off too! Smilie Note that the ultimate goal is to extract the Total and free space in 2 separate variables. If that can be done during the loop, then even better...

Code:
# Query ASM through lsdg for Free_MB and Total_MB columns

i=1

while [[ $QUERYLSDG != " " ]]
do

QUERYLSDG=$(asmcmd lsdg | awk '{print $i}')

echo $QUERYLSDG

case $QUERYLSDG in
       Total_MB)       TOTALCOL=$i;;
       Free_MB)        FREECOL=$i;;
esac

i=i+1
done

echo $TOTALCOL
echo $FREECOL

 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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