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Help with ksh Shell Script

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# 1  
Old 02-02-2012
Question Help with ksh Shell Script
My goal is to create a script that will check if in a test or production environment. I wrote this script to check $host variable to check which server I'm on but this script does not work.

Code:
if [ "$host" == "abc_test" ]
then
       BASE=/home/fmtest; export BASE
else
       BASE=/home/fmprod; export BASE
fi
 
echo $BASE

No matter which server I run this on (Test or Production) it echo's "/home/fmtest"
Last edited by methyl; 02-02-2012 at 01:21 PM.. Reason: please use code tags
# 2  
Old 02-02-2012
Code:
if [ $(hostname) == "abc_test" ]
then  
  BASE=/home/fmtest; export BASE
else
  BASE=/home/fmprod; export BASE
fi

echo $BASE

--ahamed
# 3  
Old 02-02-2012
An if this is actually "ksh", the "==" is invalid: Anyway we always put quotes round a string comparison.

Code:
if [ "$(hostname)" = "abc_test" ]
then  
  BASE=/home/fmtest; export BASE
else
  BASE=/home/fmprod; export BASE
fi

echo $BASE

Worth checking what the output from the hostname command looks like because it should be the full qualified hostname and may be different from uname -n .
This User Gave Thanks to methyl For This Post:
ahamed101
# 4  
Old 02-02-2012
Thank you so much, this is now working as designed!Smilie
# 5  
Old 02-03-2012
Quote:
Originally Posted by methyl
Anyway we always put quotes round a string comparison.
It is not necessary to uses quotes in ksh93 unless you have white spaces in your string. This works as intended:
Code:
if [[ $(hostname) = IISC08 ]]
then
    echo "IISC08"
fi

# 6  
Old 02-03-2012
@fpmurphy
Agreed. It's also not necessary in ksh88. If you omit the quotes you do get a syntax error if any of the variables are empty.
However I'm on a one-man mission to try to get the populus to put quotes round strings because this second only to misuse of "for" in the common scripting errors posted on this board.
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