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Shell Programming and Scripting

Errors in if conditions.....

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# 1  
Old 12-17-2012
Errors in if conditions.....
Code:


Code:



#if [ "$var" -ne 1 -a "$var" -ne 2 -a "$var" -ne 3 -a "$var" -ne 4 -a "$var" != "2 Then 1" -a "$var" != "3 Then 1" -a "$var" != "4 Then 1" ]
if [ "$var" -ne 1 -a "$var" -ne 2 -a "$var" -ne 3 -a "$var" -ne 4 -a "$var" != "2 Then 1" -a "$var" != "3 Then 1" -a "$var" != "4 Then 1" ]
then
echo $varNO >> AgriN.csv
fi
done < data


The above script throws error such as integer expression expected. How do i rectify that??
# 2  
Old 12-17-2012
You could do a number of things.
  • Validate your input to ensure it only contains numbers
  • Change from numeric to string operators
  • Throw the error away and ignore it
# 3  
Old 12-17-2012
i did that scott.... but no luck....
# 4  
Old 12-17-2012
You did which bit?
Code:
[scott@web1] /home/scott/scripts $ cat myScript
echo "Output from first loop..."
while read var; do
  if [ "$var" -ne 1 -a "$var" -ne 2 -a "$var" -ne 3 -a "$var" -ne 4 \
      -a "$var" != "2 Then 1" -a "$var" != "3 Then 1" -a "$var" != "4 Then 1" ]; then
    echo Blah
  fi
done < file1
echo
echo "Output from second loop..."
while read var; do
  if [ "$var" != 1 -a "$var" != 2 -a "$var" != 3 -a "$var" != 4 \
    -a "$var" != "2 Then 1" -a "$var" != "3 Then 1" -a "$var" != "4 Then 1" ]; then
    echo Blah
  fi
done < file1
echo "End."
[scott@web1] /home/scott/scripts $ ./myScript
Output from first loop...
./myScript[3]: ia: 0403-009 The specified number is not valid for this command.
Blah
 
Output from second loop...
Blah
Blah
End.

You can't use numeric operators in any case, since you expect $var to be either a number or a string, so you should always treat it like a string.
This User Gave Thanks to Scott For This Post:
nikhil jain
# 5  
Old 12-17-2012
thank you Smilie Smilie
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