How to activate Korn Shell functionnalities in Bourne Shell


 
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# 1  
Old 03-31-2010
How to activate Korn Shell functionnalities in Bourne Shell

Hi All

I have writing a Korn Shell script to execute it on many of our servers. But some servers don't have Korn Shell installed, they use Borne Shell.

Some operations like calculation don't work :
Code:
cat ${file1} | tail -$((${num1}-${num2})) > ${file2}

Is it possible to activate Korn Shell functionnalities in Bourne Shell script ?

Many thanks
# 2  
Old 03-31-2010
You'll need to rewrite the script using an external command (expr?),
the Bourne shell does not provide a builtin arithmetic expansion.
# 3  
Old 03-31-2010
Have you tried a shebang line at the top of the script?

Code:
#!/bin/ksh


Can you say which Operating System(s) (with version) are giving difficulty?
# 4  
Old 03-31-2010
Or maybe you can download ksh ?
Or maybe you have also bash ? Those lines works also in bash.
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