How to take parameters as non case sensitive

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1

Is there a way for me to take a parameter then store it in a variable and use its value as non case sensitive?

Ex.

Lets say i have a parameter which contains "Hey".
Then im gonna store it to GR using

GR=$1

.

CL=/install/$GR.g

How can i make GR non case sensitive so that the script will use HEY.g in case Hey.g is not in the directory?

Thanks!

2

in KSH you can use typeset to set GR to lower or upper case.
typeset -u GR for uppercase or -l for lowercase.

Combine it with test to check whether the directory exists before running your code on it. (-d)

Can GR be mix of upper/lowercase letters aswell e.g can GR be Hey, HEy, hEy etc. ?
If so, it will complicate things a bit, but is doable with regex and custom shell functions.