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Nested for loop not ending

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# 1  
Old 06-21-2012
Bug Nested for loop not ending
Hi All,

Need help on below script

Code:
for g in `cat /home/sid.txt`
do
for h in `cat /home/dev.txt`
do
symmaskdb -sid $g -dev $h list assign |grep FA |head -1|awk '{print $2}' > tt1.txt
done
done

cat /home/sid.txt
**************
Code:
123
235
456

cat /home/dev.txt
***************
Code:
35
67
88

I sould get the loop to run like below

Code:
symmaskdb -sid 123 -dev 35 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 235 -dev 67 list assign |grep FA |head -1|awk '{print $2}' 

symmaskdb -sid 456 -dev 88 list assign |grep FA |head -1|awk '{print $2}'

But current the lopp is running like this

Code:
symmaskdb -sid 123 -dev 35 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 123 -dev 67 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 123 -dev 88 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 235 -dev 35 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 235 -dev 67 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 235 -dev 88 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 456 -dev 35 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 456 -dev 67 list assign |grep FA |head -1|awk '{print $2}' 
symmaskdb -sid 456 -dev 88 list assign |grep FA |head -1|awk '{print $2}'


Moderator's Comments:
Mod Comment Please use [code]...[/code] tags instead of [quote]...[/quote] tags for code and samples


Last edited by Scrutinizer; 06-21-2012 at 04:26 AM.. Reason: quote tags => code tags
# 2  
Old 06-21-2012
Try:
Code:
while read g && read h <&3
do
  symmaskdb -sid $g -dev $h list assign |grep FA |head -1|awk '{print $2}'
done </home/sid.txt 3</home/dev.txt >tt1.txt

# 3  
Old 06-21-2012
Thanks that one working. Now I need add this to my main script.

But now I have two issues
1. Nested while loop not ending.
2. If we use single greater than arrow > it means it will not append right, in my case the output data is getting appended

Main script. Pls let me know where i am dong mistake
Code:
for f in `cat rdf2-dg.txt`
do
  symrdf -g $f query >> /home/srdf-query-report.txt
done

cat /home/srdf-query-report.txt|grep -i "Remote Symmetrix ID"|awk '{print $5}'> /home/sid.txt
cat /home/srdf-query-report.txt|grep -i "DEV001"|awk '{print $7}' > /home/dev.txt

while read g && read h <&3
do
  symmaskdb -sid $g -dev $h list assign |grep FA |head -1|awk '{print $2}' > tt1.txt
done </home/sid.txt 3</home/dev.txt 

while read k && read l <&3
do
  symmaskdb -sid $k -wwn $l list devs >> /home/srdf-query-report.txt
  symmaskdb -sid $k -wwn $l list devs|grep "User-generated Name"|awk '{print $4}'|sed "s/[/][0-9]*//" >tt2.txt
done </home/sid.txt 3<tt1.txt

while read i && read j <&3
do
  symmaskdb -sid $i -dev $j list assign |grep FA |head -1|awk '{print $2}'
done </home/sid.txt 3<tt2.txt >> /home/srdf-query-report.txt

Last edited by Scrutinizer; 06-21-2012 at 06:28 AM.. Reason: code tags instead of quote tags, removed formatting, added indenting
# 4  
Old 06-21-2012
Like this:
Code:
symmaskdb -sid $g -dev $h list assign |grep FA |head -1|awk '{print $2}' > tt1.txt

The output file gets overwritten, each time the symmaskdb command is run in the loop..
# 5  
Old 06-21-2012
Quote:
symmaskdb -sid $g -dev $h list assign |grep FA |head -1|awk '{print $2}' > tt1.txt
I am already using that only still it was not over written it was appending dont know. FYI i am using cygwin on windows.

What about for my 1 question any help

1. Nested while loop not ending. Is there any syntax mistake on my script?
# 6  
Old 06-21-2012
What nested while loop is not ending? I do not see one in your script..

If you use command > file inside a loop only the output of the last command will be in that file once the loop finishes....
Last edited by Scrutinizer; 06-21-2012 at 07:08 AM..
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