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Reusing a variable in a script

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Top Forums Shell Programming and Scripting Reusing a variable in a script
# 1  
Old 10-11-2013
Lightbulb Reusing a variable in a script
I was breaking my head for a day still not successful


I have variable x for following is assigned

Code:
x=awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' log filename | awk '{print $2}'

echo "$x"

2341

I have this piece of code inside a loop which runs n times.

I want to print or echo the value of "x" every time when it comes out of the loop (i.e if the loop condition is true). But unfortunately when
I echo the variable "x" 1st time it contains single value and when I echo variable "x" on the 2nd run of the loop I see values getting appended
to the 1st value i.e tab separated. If the loop runs for 5 times and if I echo the variable "x" at the last i get something like this
Code:
echo $x

2341 4665 5661 2342 1911

or

echo "$x"

2341
4665
5661
2342
1911

My goal is to get these values individually something like this

After the 1st loop:

Code:
echo $x
2341

After the 2nd loop:

Code:
echo $x
4665

Afetr the 3rd loop:

Code:
echo $x
5661

After the 4th loop:

Code:
echo $x
2342

After the 5th loop:

Code:
echo $x
1911

# 2  
Old 10-11-2013
Perhaps try putting your awk statement in a for loop:

Code:
for x in $(awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' log filename | awk '{print $2}')
do
    echo $x
done

This User Gave Thanks to in2nix4life For This Post:
rpm120
# 3  
Old 10-11-2013
If the filename contains each data as a new line its simple:
Code:
all="";C=0
while read line;do echo "Line:$C - $line";all+=" $line";let C++;done<filename
echo $all

You could also try:
Code:
for entry in $(cat filename);do echo "Working with: $entry...";done

EDIT
:doh: there are times i miss a delete button, completly overseen the awk statement.
Last edited by sea; 10-11-2013 at 10:34 AM..
# 4  
Old 10-11-2013
Quote:
Originally Posted by rpm120
. . .
Code:
x=awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' log filename | awk '{print $2}'

I'm pretty sure that statement will NOT assign any number to x let alone a series of numbers. Would you make it a correct command substitution x=$(...), then still it should assign one number only in each loop. And, as the command obviously does not change in the loop, the result should always be the same identical number.

Please post relevant parts of your script plus input (partial) files, so we can reproduce what you describe above.
# 5  
Old 10-11-2013
Lightbulb
Quote:
Originally Posted by RudiC
I'm pretty sure that statement will NOT assign any number to x let alone a series of numbers. Would you make it a correct command substitution x=$(...), then still it should assign one number only in each loop. And, as the command obviously does not change in the loop, the result should always be the same identical number.

Please post relevant parts of your script plus input (partial) files, so we can reproduce what you describe above.
Following are the actual lines from the script:

Code:
#!/bin/ksh

fname=$1

for batchname in $(grep -i "Processing batch" $fname | cut -d "'" -f2)
do
Batch_state=`grep -c -i "Batch '$batchname' was successful" $fname`
if [[ "$Batch_state"  -ge 1 ]];then

S_Time=`awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' $fname | awk '{print $2}'`
E_Time=`awk '/[0-9]_[0-9].*successful/{getline;getline;getline;getline;print}' $fname| awk '{print $2}'`
echo $batchname"\t"$S_Time"\t"$E_Time
}
else
{
echo $batchname encountered an error
}
fi
done

The Output that this is producing

Code:
1231324        14:29:04 15:29:11    14:32:19 15:33:11
3097935        14:29:04 15:29:11    14:32:19 15:33:11

Desired Output:

Code:
1231324        14:29:04     14:32:19 
3097935        15:29:11     15:33:11

Sample Input

Code:
 2013/06/11 13:26:57 <0999> (725102)
    Creating batch '12_2013162201.0'...
    2013/06/11 13:26:57 <0999> (725102)
    Batch '12_2013162201' was successful
    2013/06/11 13:26:57 <0999> (725102)
TMR:Child ZERO, 160 Docs 320 Pgs 3874 KByts Tot 0.42 WAL 0.10 WALIO 0.15 IO 0.03 secs
    2013/06/11 13:26:57 <0999> (725102)  Processing batch '12_2013162201'
    2013/06/11 13:26:57 <0999> (725102)
    Total in batch: 160 documents using 4 KBytes

Hope this one is helpful.

---------- Post updated at 10:29 AM ---------- Previous update was at 09:06 AM ----------

Quote:
Originally Posted by in2nix4life
Perhaps try putting your awk statement in a for loop:

Code:
for x in $(awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' log filename | awk '{print $2}')
do
    echo $x
done

In my scenario I cannot use a for condition. I have pasted the actual lines from the code :

Code:
#!/bin/ksh

fname=$1

for batchname in $(grep -i "Processing batch" $fname | cut -d "'" -f2)
do
Batch_state=`grep -c -i "Batch '$batchname' was successful" $fname`
if [[ "$Batch_state"  -ge 1 ]];then

S_Time=`awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' $fname | awk '{print $2}'`
E_Time=`awk '/[0-9]_[0-9].*successful/{getline;getline;getline;print}' hp.log | awk '{print $2}'`
echo $batchname"\t"$S_Time"\t"$E_Time
}
else
{
echo $batchname encountered an error
}
fi
done

Last edited by rpm120; 10-11-2013 at 11:53 AM..
# 6  
Old 10-12-2013
Applied to your sample input, above script yields
Code:
12_2013162201    13:26:57    13:26:57

I can't see any error - no reason to complain. Please convince me that sth is wrong!
This User Gave Thanks to RudiC For This Post:
rpm120
# 7  
Old 10-12-2013
Lightbulb
Quote:
Originally Posted by RudiC
Applied to your sample input, above script yields
Code:
12_2013162201    13:26:57    13:26:57

I can't see any error - no reason to complain. Please convince me that sth is wrong!
Additional to the above info about the log, the given above log has 9 lines and these 9 lines are the unique lines, In real time my original log will have this 9 lines or this block repeated n times with batch numbers changed in each block or sequence .

Hence now coming to the point when this script is used for a log with more than one block or one sequence , the problem arises there I.e all the extracted are saved in a varible tab separated as shown above.

Hope I m clear.
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