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How to get this to evaluate right

Posted on 2006-06-11
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Last Modified: 2012-05-05
COUNTER=1
                 while [  $COUNTER -lt 8 ]; do
                        doorstatus=`echo $sensedvalues | cut -d ','  -f $COUNTER`;
                         let COUNTER+=1
         done


How can I get $COUNTER to work.  I want to get the value of each column from the cut.  But $COUNTER doesn't break down to a number.  so the line errors.

Thanks

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Question by:Tigger996
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2 Comments
 
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Accepted Solution

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Duncan Roe earned 2000 total points
ID: 16883301
WFFM (Works Fine For Me). I tried your script except I inserted an echo command to monitor the value of doorstatus, and I gave sensedvalues a value (which I assume you do elsewhere):

15:41:27$ cat x.sh
#!/bin/sh
#set -x
sensedvalues='a,b,c,d,e,f,g,h'
COUNTER=1
while [  $COUNTER -lt 8 ]; do
  doorstatus=`echo $sensedvalues | cut -d ','  -f $COUNTER`;
  echo "doorstatus = $doorstatus"
  let COUNTER+=1
done
15:41:33$ ./x.sh
doorstatus = a
doorstatus = b
doorstatus = c
doorstatus = d
doorstatus = e
doorstatus = f
doorstatus = g
15:41:52$

If you uncomment "set -x" you can see COUNTER incrementing - no problem.

Do you have a "#!/bin/sh" line at the front of your script? Otherwise just possibly some other shell is trying to interpret it. Failing that, it's a bit of a mystery - try inserting "set -x" to see better what's happening.
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Author Comment

by:Tigger996
ID: 16883365
Boy do I feel stupid -- I had 1 too many spaces afer the -f, thanks for the help!


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