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Shell Programming and Scripting

Taking one input at a time

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# 1  
Old 06-23-2011
Taking one input at a time
Legends,

Please help me to come out of the below Bermuda triangle.

I have four inputs in a shell script: A B C D
Now, If A is passed by user then, B C D will be ignored.
If C is passed by user, then A B D will be ignored.

Regards,
Sandy
# 2  
Old 06-23-2011
case statement in shell will help you.
# 3  
Old 06-23-2011
What A, B, C and D are: positional parameters or literal values?
# 4  
Old 06-23-2011
I am using the below case statement, but it is not working


Code:
case $SYSTEM_NAME in
        A) echo "The script will not run on B C D

        C) echo "The script will not run on B A D

        *) echo "\nInvalid Input..."
esac

Last edited by radoulov; 06-23-2011 at 06:12 AM.. Reason: Code tags.
# 5  
Old 06-23-2011
Code:
case $SYSTEM_NAME in         
  A ) echo "The script will not run on B C D ;;          
  C ) echo "The script will not run on B A D ;;          
  * ) echo "\nInvalid Input..." ;; 
esac

VBut you should decide the precedence, with the above script A takes precedence over C.
# 6  
Old 06-23-2011
yes true, there were multiple lines so ( ;; ) were inserted in end, and were removed while pasting here to shorten the code
# 7  
Old 06-23-2011
What this statement means:

Quote:
If C is passed by user, then A B D will be ignored.
If both A and C are passed, the script will use only A.
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