linux-from-scratch/env-check.sh

#! /bin/bash
set +h
runthis() {
    echo "\$ $@"
    eval "$@"
}

runthis whoami
echo
runthis umask
echo
runthis "echo $LC_ALL"
echo
runthis "echo $LFS"
echo
runthis "echo $LFS_TGT"
echo
runthis "echo $PATH"
echo

OPTNAMES=""
for w in $(echo $- | sed -e 's/\(.\)/\1\n/g'); do
    [[ -n $OPTNAMES ]] && OPTNAMES+=","
    case $w in
        a) OPTNAMES+=allexport      ;;
        b) OPTNAMES+=notify         ;;
        B) OPTNAMES+=braceexpand    ;;
        C) OPTNAMES+=noclobber      ;;
        e) OPTNAMES+=errexit        ;;
        E) OPTNAMES+=errtrace       ;;
        f) OPTNAMES+=noglob         ;;
        h) OPTNAMES+=hashall        ;;
        H) OPTNAMES+=histexpand     ;;
        k) OPTNAMES+=keyword        ;;
        m) OPTNAMES+=monitor        ;;
        n) OPTNAMES+=noexec         ;;
        p) OPTNAMES+=privileged     ;;
        P) OPTNAMES+=physical       ;;
        t) OPTNAMES+=onecmd         ;;
        T) OPTNAMES+=functrace      ;;
        u) OPTNAMES+=nounset        ;;
        v) OPTNAMES+=verbose        ;;
        x) OPTNAMES+=xtrace         ;;
    esac
done
echo "Current shell options: $OPTNAMES"

echo
runthis "df -h | grep lfs"