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Full Discussion: awk help - matching a field with certail values
Top Forums Shell Programming and Scripting awk help - matching a field with certail values Post 302803331 by Don Cragun on Monday 6th of May 2013 12:07:15 PM
Old 05-06-2013
Quote:
Originally Posted by juzz4fun
Hello there,

I have a file with few fields separated by ":". I wrote a below awk to manipulate this file:

awk 'BEGIN { FS=OFS=":" }\
NR != 1 && $2 !~ /^98/ && $8 !~ /^6[12][01][0]/{print $0}' $in_file > $out_file

What I wanted was that if $8 field contains any of the values - 6100, 6110, 6200 - it should not be processed. But above pattern will match to 6210 as well and will reject it. What modification should I make in order for pattern not to select 6210 and all 6210s appear in the output?

regards,
juzz4fun
Code:
awk 'BEGIN { FS=OFS=":" }
NR != 1 && $2 !~ /^98/ && $8 !~ /^6(10|11|20)0/' $in_file > $out_file

will copy lines from $infile to output if and only if:
  1. it is not the 1st line of the file,
  2. the second field in the file does not start with "98", and
  3. the eighth field in the file does not start with 6100, 6110, or 6200.
Note that item #3 in the list says "start with" (which is what your code was doing), but your English description said "contains". If you want "contains" instead of "starts with", change /^6(10|11|20)0/ to /6(10|11|20)0/. If you want "is" instead of "starts with" or "contains", change $8 !~ /^6(10|11|20)0/ to $8 != /6(10|11|20)0/.
 

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bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
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       bup-midx(1), bup-save(1)

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AUTHORS

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Bup unknown-															     bup-margin(1)
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