PTC MKS Toolkit Knowledge Base

Section:IO
Product:MKS Toolkit (All)
Version:
OS:All
Keywords:case, sensitive, DUALCASE
Category:Utilities/Knowledge Base


How do I make an MKS KornShell case statement case-sensitive?


Case statements use the file name generation feature of the shell which is normally case-insensitive as documented in the sh(1) reference page. If you want to make file name generation case-sensitive then set the variable DUALCASE to a non-zero value.

Example:

    DUALCASE=1
    case “$1” in
    -r*) echo r;;
    -R) echo R;;
    *) echo other
    esac
    unset DUALCASE

Note:
As of version 7.5 a new variable has been added. Setting TK_DUALCASE_IN_CASE_STATEMENTS to any value will make pattern-matching in case statements case-sensitive. When TK_DUALCASE_IN_CASE_STATEMENTS is not set, the DUALCASE environment variable determines whether or not pattern-matching is case-sensitive in the same way it does for file name generation.