DUALCASE=1; export DUALCASE # for MKS sh

if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :

  emulate sh

  NULLCMD=:

  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which

  # is contrary to our usage.  Disable this feature.

  alias -g '${1+"$@"}'='"$@"'

  setopt NO_GLOB_SUBST

else

  case `(set -o) 2>/dev/null` in #(

  *posix*) :

    set -o posix ;; #(

  *) :

     ;;

esac

fi