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Looping in awk
Post 22294 by Kelam_Magnus on Thursday 30th of May 2002 06:58:57 PM
05-30-2002
You can use the $r from the first loop by adding a second for statement in the middle of the second one. Then you can replace the "0-6" with "$r" instead!
It looks like you are reading $i twice. Once in the for statement and then again with the "cat $i". I am not sure if you are using data in the $i or just using it for the looping or both. So you may need to keep that portion.
1) move the first done to the end of the whole script
2) use the $r from the first loop for the second loop. I try to use variables wherever possible.
cd /opt/daybreakp/logs
for i in accx24oac.log crbx01.log.X1 cssx108oac.log dbkx05.log dbkx12.log dbkx13.log glix10oac.log salx17oac.log
do
for r in "0 1 2 3 4 5 6"
cat $i | awk '($1 == "'${DAY[$r]}''" ) {print $0}' > /tmp/$i.tmp
mv /tmp/$i.tmp $i
done
done
I am not sure that is what you want above. MAYBE LIKE THIS NEXT ONE BELOW...
cd /opt/daybreakp/logs
for i in accx24oac.log crbx01.log.X1 cssx108oac.log dbkx05.log dbkx12.log dbkx13.log glix10oac.log salx17oac.log
do
for r in "0 1 2 3 4 5 6"
cat $i | awk '($1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ) {print $0}' > /tmp/$i.tmp
mv /tmp/$i.tmp $i
done
done
The less hardcoding of values and the more variables that you use the less headache you will have later or when someone else has to edit your code.
It looks like you are reading $i twice. Once in the for statement and then again with the "cat $i". I am not sure if you are using data in the $i or just using it for the looping or both. So you may need to keep that portion.
1) move the first done to the end of the whole script
2) use the $r from the first loop for the second loop. I try to use variables wherever possible.
cd /opt/daybreakp/logs
for i in accx24oac.log crbx01.log.X1 cssx108oac.log dbkx05.log dbkx12.log dbkx13.log glix10oac.log salx17oac.log
do
for r in "0 1 2 3 4 5 6"
cat $i | awk '($1 == "'${DAY[$r]}''" ) {print $0}' > /tmp/$i.tmp
mv /tmp/$i.tmp $i
done
done
I am not sure that is what you want above. MAYBE LIKE THIS NEXT ONE BELOW...
cd /opt/daybreakp/logs
for i in accx24oac.log crbx01.log.X1 cssx108oac.log dbkx05.log dbkx12.log dbkx13.log glix10oac.log salx17oac.log
do
for r in "0 1 2 3 4 5 6"
cat $i | awk '($1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ||
$1 == "'${DAY[$r]}'" ) {print $0}' > /tmp/$i.tmp
mv /tmp/$i.tmp $i
done
done
The less hardcoding of values and the more variables that you use the less headache you will have later or when someone else has to edit your code.
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LEARN ABOUT DEBIAN
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1) NAME
unbuffer - unbuffer output SYNOPSIS
unbuffer program [ args ] INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose you are watching the output from a fifo by running it through od and then more. od -c /tmp/fifo | more You will not see anything until a full page of output has been produced. You can disable this automatic buffering as follows: unbuffer od -c /tmp/fifo | more Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the -p flag. Example: process1 | unbuffer -p process2 | process3 CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider: process1 | unbuffer -p process2 | process3 If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or process2. In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro- cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place- holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder for another process. $ cat /tmp/abcdef.log | grep abc | cat abcdef xxxabc defxxx $ cat /tmp/abcdef.log | unbuffer grep abc | cat $ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat abcdef xxxabc defxxx $ BUGS
The man page is longer than the program. SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995. AUTHOR
Don Libes, National Institute of Standards and Technology 1 June 1994 UNBUFFER(1)