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Conflict with the operator in IF


 
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Top Forums Shell Programming and Scripting Conflict with the operator in IF
# 1  
Old 12-01-2011
Conflict with the operator in IF

I am using a script like this
Code:
source=$1

if [ "$source" == "bof.tmp_rst_tb" ] ; 
then 
  echo "got it"
else 
  echo "lost it"
fi


But the script is giving th error like
Code:
script.ksh[144]: ==: unknown test operator

Can i know , is the syntax iam using is correct or suggest me a good way.

Thanks.

Last edited by Scott; 12-01-2011 at 05:04 PM.. Reason: Please use code tags. PS: Added the missing "fi"
# 2  
Old 12-01-2011
What happens if you use one = instead of two?

Tested this with a few shells (well bash and ksh) on a couple of OS's (not Solaris).

So, feeling lucky, I'll say you're using Solaris Smilie
# 3  
Old 12-01-2011
YUp it works..
Thanks a lot
# 4  
Old 12-01-2011
The reason it failed is that
Code:
if [  expression ]

is the same as:
Code:
if test expression

and test(1) does not support the == operator. For that, you need a use a conditional expression as described in ksh(1), which uses "[[":
Code:
if [[ expression ]]


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