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path: root/ksh/shrc.d/ksh.sh
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# If we're running some kind of ksh, we'll need to source its specific
# configuration if it was defined or if we can find it.  Bash and Zsh invoke
# their own rc files first, which I've written to then look for ~/.shrc; ksh
# does it the other way around.

# Unfortunately, this isn't very simple, because KSH_VERSION is set by PDKSH
# and derivatives, and in ksh93t+ and above, but not in earlier versions of
# ksh93.  To make matters worse, the best way I can find for testing the
# version makes other shells throw tantrums.

# Does the name of our shell have "ksh" in it at all?  This is in no way
# guaranteed.  It's just a heuristic that e.g. Bash shouldn't pass.
case $0 in
    *ksh*) ;;
    *) return ;;
esac

# If KSH_VERSION is not already set, we'll try hard to set it to something
# before we proceed ...
if [ -z "$KSH_VERSION" ] ; then

    # Test whether we have content in the .sh.version variable.  Suppress
    # errors and run it in a subshell to work around parsing error precedence.
    # shellcheck disable=SC2234
    ( test -n "${.sh.version}" ) 2>/dev/null || return

    # If that peculiarly named variable was set, then that's our KSH_VERSION
    KSH_VERSION=${.sh.version}
fi

# If ENV_EXT isn't already set, set it
[ -n "$ENV_EXT" ] || ENV_EXT=$HOME/.kshrc