Shell Scripting

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need help with writing shell script

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Join Date: Oct 2007

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n2201

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need help with writing shell script

Oct 25th, 2007

I want to get out put as folows:

 Help with Code Tags 
 Shell Scripting Syntax (Toggle Plain Text) 
100 HE01 {number of line in this file} {file created on time stamp}
200 LTXS {number of line in this file} {file created on time stamp} 
 
(if the file does not exist then it should say FILE NOT AVAILABLE
100 HE01 {number of line in this file} {file created on time stamp}
200 LTXS {number of line in this file} {file created on time stamp} 

(if the file does not exist then it should say FILE NOT AVAILABLE

to start with I have a input file (inputfile.txt) that contains following data:

Help with Code Tags

Shell Scripting Syntax (Toggle Plain Text)

100 HE01 file1.txt
200 LTXS file2.txt

and file1.txt & file2.txt are in the current directory. there is a chance that they file may not exist.

I tried for loop, wc -l, grep, cut but the out put is not very satis factory.

Don't hesitate to give me any go-to or pointer to finding the solution. I don't expect you to do my work ;-)

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Join Date: Oct 2007

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eggi

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Re: need help with writing shell script

Oct 26th, 2007

#!/bin/ksh

cat inputfile.txt|while read v w x
do
if [ -e $x ]
then
num_lines=`wc -l $x|sed -e 's/ *//' -e 's/ .*$//'`
time_stamp=`ls -l $x|awk '{print $6 "_" $7 "_" $8}'`
echo "$v $w $x $num_lines $time_stamp"
fi
done

That will give you output like this (when both files exist - either one would just not do anything if they weren't there)

100 HE01 file1.txt 3 Oct_25_22:27
200 LTXS file2.txt 12 Oct_25_22:27

Hope that helps

, Mike

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Join Date: Oct 2007

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n2201

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Re: need help with writing shell script

Oct 26th, 2007

Thank you Mike,

This was perfect. This is exactly what I was looking for!

I guess I cannot thank you enough :-)

Nikhil

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Join Date: Apr 2006

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ghostdog74 ghostdog74 is offline

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Re: need help with writing shell script

Oct 28th, 2007

•

Originally Posted by eggi

#!/bin/ksh

cat inputfile.txt|while read v w x
do
if [ -e $x ]
then
num_lines=`wc -l $x|sed -e 's/ *//' -e 's/ .*$//'`
time_stamp=`ls -l $x|awk '{print $6 "_" $7 "_" $8}'`
echo "$v $w $x $num_lines $time_stamp"
fi
done

no need for cat

 Help with Code Tags 
 Shell Scripting Syntax (Toggle Plain Text) 
while read ....
do
....
done < inputfile.txt
while read ....
do
....
done < inputfile.txt

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Join Date: Oct 2007

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eggi

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Posting Whiz

Re: need help with writing shell script

Oct 28th, 2007

Pick your poison, I guess - cat or redirect STDIN.

Thanks for the alternative suggestion

, Mike

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Join Date: Oct 2007

Posts: 399

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eggi

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Posting Whiz

Re: need help with writing shell script

Oct 28th, 2007

Meant to write - cat or redirect output from file. I really have to stop posting on weekend mornings

Again, thanks

, Mike

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Join Date: Oct 2007

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n2201

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Re: need help with writing shell script

Nov 9th, 2007

Mike (eggi),

your suggestion is correct. I hit this bug with the cat option: http://osdir.com/ml/shells.bash.bugs.../msg00023.html

Some how if you cat and pipe then the varibales are all converted to local variables within the while loop. I had to use the redirect input to over come the issue: Here is how I did it finally:

•

while read v w x
do
if [ -e /usr/task/shared/$x ];
then
{ num_lines=`wc -l /usr/task/shared/$x|sed -e 's/ *//' -e 's/ .*$//'`
time_stamp=`ls -l /usr/task/shared/$x|awk '{print $6 " " $7 " " $8}'`
echo "$v $w $time_stamp $num_lines" >> outputfile.txt
let total+=num_lines
}
else
{ echo "$v $w FILE DOES NOT EXIST" >> outputfile.txt
}
fi
done < /usr/task/lst_New_Leads_Camp.txt
echo "---------------------------------------------" >> outputfile.txt
echo " Total leads: ${total} " >> outputfile.txt
echo "---------------------------------------------" >> outputfile.txt

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Join Date: Oct 2007

Posts: 399

Reputation: eggi will become famous soon enough

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eggi

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Posting Whiz

Re: need help with writing shell script

Nov 9th, 2007

Cool - that's good to know. I've never hit that bug, but I'll be sure not to now

BTW, Credit GhostDog with the suggestion to redirect, I suggested using cat, so I don't deserve the thanks - but it's the thought, or gesture, that counts

Take it easy

, Mike