1 はじめに

• インストーラ・メディアでは/etc/rc.localで

  if [ -f /etc/installerconfig ]; then
                  if bsdinstall script /etc/installerconfig; then
  dialog --backtitle "FreeBSD Installer" --title "Complete" --no-cancel \
      --ok-label "Reboot" --pause "Installation of FreeBSD complete! \
      Rebooting in 10 seconds" 10 30 10
                          reboot
                  else
  dialog --backtitle "FreeBSD Installer" --title "Error" --textbox \
      /tmp/bsdinstall_log 0 0
                  fi
                  exit 
          fi
  

  となってるので，*.imgの中の/etc/installerconfigにbsdinstall(8)のSCRIPTINGを書けばインストールをバッチ処理できる．

  • /usr/sbin/bsdinstallでは

     :
    (snip)
      :
    while getopts $GETOPTS_STDARGS ignored; do
            : just skipping known flags
    done
    shift $(( $OPTIND - 1 ))
    
    # What are we here to do?
    VERB="${1:-auto}"; shift
      :
    (snip)
      :
    if [ "$debug" ]; then
            case "$debugFile" in
            # If NULL, send errors to the bit-bucket
            "") exec "/usr/libexec/bsdinstall/$VERB" "$@" 2> /dev/null ;;
    # If begins with `+', send errors to both terminal and file (no `+')
            +*) exec "/usr/libexec/bsdinstall/$VERB" "$@" \
                    2>&1 >&$TERMINAL_STDOUT_PASSTHRU | tee "${debugFile#+}" ;;
            # Otherwise, just send errors to the file specified
            *) exec "/usr/libexec/bsdinstall/$VERB" "$@" 2>> "$debugFile"
            esac
    else
            exec "/usr/libexec/bsdinstall/$VERB" "$@" 2> /dev/null
    fi
    

    なので，"/usr/libexec/bsdinstall/script /etc/installerconfig"が実行されることになる