if [ -n "${BASH_VERSION-}" -o -n "${KSH_VERSION-}" -o -n "${ZSH_VERSION-}" ]; then
[ "`/usr/bin/id -u 2>/dev/null || echo 0`" -le 200 ] && return
# for bash and zsh, only if no alias is already set
alias vi >/dev/null 2>&1 || alias vi=vim
fi