Using an If Statement to Check One of Three Possible Values

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Article #4035

#4035

From: kvnsmnsn
Date: Tue, 11 Jul 2006 20:20

37 lines
2459 bytes

I'm trying to build a bash script that creates an "x.java" and a
"y.java" file from three existing pairs of files, depending on whether
an "a", a "b", or a "c" is entered on the command line.  My bash code
checks to see if the number of arguments entered on the command line
is one, which check it handles fine, but if it passes that check and
goes on to the next "if" statement, it gives me the complaints:

     Hmm.sh: line 4: [: missing `]'
     Hmm.sh: line 4: a: command not found
     Hmm.sh: line 4: a: command not found
     Incorrect operand "a".

My actual code is:

     #! /bin/sh
     if [ $# == 1 ]
     then
       if [ $1 == "a" || $1 == "b" || $1 == "c" ]
       then
         cp x_$1.java x.java
         cp y_$1.java y.java
       else
         echo "Incorrect operand \"$1\"."
       fi
     else
       echo "Usage is"
       echo "  sh Hmm.sh <suffix>"
     fi

Can anyone see what I'm doing wrong here?  Any pointers would be
greatly appreciated.

                                ---Kevin Simonson

"You'll never get to heaven, or even to LA,
if you don't believe there's a way."
from _Why Not_

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From: kvnsmnsn@hotmail.com
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Subject: Using an If Statement to Check One of Three Possible Values
Date: 11 Jul 2006 13:20:11 -0700
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