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for loop returns more output with awk

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# 1  
Old 09-03-2010
for loop returns more output with awk
I need to get total number of hdisk not assigned to any VGs.
Code:
PDC # lspv |grep None |awk '{print $1}' |wc  
     131     131    1099

So, it shows 131 hdisks.

I need to look at the individual hdisk fget_config info like below:
Code:
PDC # fget_config -Av |grep hdisk230   
hdisk230 dac1  229 db4epic7

If I put these lines in for loop,
Code:
for diskname in $(lspv |grep None |awk '{print $1}')
do
fget_config -Av |grep $diskname 
done

the output gives me total number of hdisk as 362 with some duplicate hdisks info.

Please advise why for loop returns more outputs and the fix.

Thank you so much.
Last edited by Daniel Gate; 09-03-2010 at 11:24 AM.. Reason: code tags please
# 2  
Old 09-03-2010
Code:
fget_config -Av |grep $diskname

Check this and make sure that , $diskname is unique. I guess , the above statement returning more than one row for each $diskname.
# 3  
Old 09-03-2010
Yes, $diskname is unique (131 disks are unique with no duplicate).
Code:
for diskname in $(lspv |grep None |awk '{print $1}')
do
fget_config -Av |grep $diskname
done | sort -u

I added | sort -u to see what happens. " | sort -u " suppressed quite a bit, still the number of output is 219, which 88 extra outputs are returned.

Please advise.

Thank you so much.
# 4  
Old 09-03-2010
Code:
 
sort -u " suppressed quite a bit

that does mean , the output is returning more than one row for each diskname.

So, replace the "grep $diskname" with,

Code:
awk '/'$diskname'/ { print ; exit }'

so the query should be:

Code:
 
for diskname in $(lspv |grep None |awk '{print $1}')
do
fget_config -Av | awk '/'$diskname'/ { print ; exit }'
done

# 5  
Old 09-03-2010
YES. Now, I am getting the correct outputs. Smilie
I see 'grep' was causing the issue.
Thank you so much Smilie
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