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Help with shell script to extract certain information

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Top Forums Shell Programming and Scripting Help with shell script to extract certain information
# 8  
Old 11-15-2014
Quote:
Originally Posted by PTL
Thank you both, much appreciated.

awk '/STOP HERE/ {FN="XX"; next} {print > FN}' FN="YY" file

Please could you explain the actions? FN, I can't seem to find that as an awk variable. Please could you expantiate a bit.

awk '!/STOP HERE/ {print} /STOP HERE/ {exit}' file > file1

Everything that is not 'STOP HERE' in the input file print but exit at 'STOP HERE' and output to file1, is this what this is doing? I will try this and see how it goes.

thank you again.
FN is an user defined variable

Print any line which does not contain the regex
Code:
awk '!/STOP HERE/ {print}'

Same that
Code:
awk '!/STOP HERE/'

Now print each line that does not contain STOP HERE and exit reading the file
if STOP HERE is found
Code:
awk '!/STOP HERE/ {print} /STOP HERE/ {exit}' file

Same effect that the following:
Code:
awk '/STOP HERE/{exit} {print}' file

Code:
awk '/STOP HERE/{exit}1' file

Last edited by Aia; 11-15-2014 at 03:11 PM.. Reason: grammar
# 9  
Old 11-16-2014
Please use code tags as required by forum rules!

Code:
awk '/STOP HERE/ {FN="XX"; next} {print > FN}' FN="YY" file

That snippet prints to the file whose name in in FN, preset to "YY" by the first parameter. When "STOP HERE" is encountered, the file name is switched to "XX", and the line in NOT printed due to the "next" directive.
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