当你在终端环境下安装新的软件时,你可以经常看到信息对话框弹出,需要你的输入。对话框的类型有密码箱,检查表,菜单,等等。他们可以引导你以一种直观的方式输入必要的信息,使用这样的用户友好的对话框的好处是显而易见的。如下图所示:
当你写一个交互式shell脚本,你可以使用这样的对话框来接受用户的输入。whiptail可以在shell脚本中创建基于终端的对话框,消息框的过程,类似于Zenity或xdialog GUI脚本代码。预先安装在所有的Linux发布版本中。
下面来看看whiptail的用法:
创建一个消息框
一个消息框中显示一个确认按钮继续任意的文本消息。
语法:
whiptail –title “<message box title>” –msgbox “<text to show>” <height> <width>
实例:
#!/bin/bash whiptail --title "Test Message Box" --msgbox "Create a message box with whiptail. Choose Ok to continue." 10 60 |
创建一个yes/no对话框
用户输入yes或no的对话框。
语法:
whiptail –title “<dialog box title>” –yesno “<text to show>” <height> <width>
实例:
#!/bin/bash if (whiptail --title "Test Yes/No Box" --yesno "Choose between Yes and No." 10 60) then echo "You chose Yes. Exit status was $?." else echo "You chose No. Exit status was $?." fi |
或者,你可以是“–yes-button” ,”–no-button”选项。
#!/bin/bash if (whiptail --title "Test Yes/No Box" -- yes -button "Skittles" --no-button "M&M's" --yesno "Which do you like better?" 10 60) then echo "You chose Skittles Exit status was $?." else echo "You chose M&M's. Exit status was $?." fi |
创建一个表单输入框
如果你想用户输入任意的文本,您可以使用一个输入框。
语法:
whiptail –title “<input box title>” –inputbox “<text to show>” <height> <width> <default-text>
实例:
#!/bin/bash PET=$(whiptail --title "Test Free-form Input Box" --inputbox "What is your pet's name?" 10 60 Wigglebutt 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "Your pet name is:" $PET else echo "You chose Cancel." fi |
创建一个密码框
当用户需要输入敏感信息时密码框是有用的。
语法:
whiptail –title “<password box title>” –passwordbox “<text to show>” <height> <width>
实例:
#!/bin/bash PASSWORD=$(whiptail --title "Test Password Box" --passwordbox "Enter your password and choose Ok to continue." 10 60 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "Your password is:" $PASSWORD else echo "You chose Cancel." fi |
创建一个菜单栏
当你想让用户选择一个任意数量的选择中,你可以使用菜单框。
语法:
whiptail –title “<menu title>” –menu “<text to show>” <height> <width> <menu height> [ <tag> <item> ] . . .
实例:
#!/bin/bash OPTION=$(whiptail --title "Test Menu Dialog" --menu "Choose your option" 15 60 4 / "1" "Grilled Spicy Sausage" / "2" "Grilled Halloumi Cheese" / "3" "Charcoaled Chicken Wings" / "4" "Fried Aubergine" 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "Your chosen option:" $OPTION else echo "You chose Cancel." fi |
创建radiolist对话框
语法:
whiptail –title “<radiolist title>” –radiolist “<text to show>” <height> <width> <list height> [ <tag> <item> <status> ] . . .
实例:
#!/bin/bash DISTROS=$(whiptail --title "Test Checklist Dialog" --radiolist / "What is the Linux distro of your choice?" 15 60 4 / "debian" "Venerable Debian" ON / "ubuntu" "Popular Ubuntu" OFF / "centos" "Stable CentOS" OFF / "mint" "Rising Star Mint" OFF 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "The chosen distro is:" $DISTROS else echo "You chose Cancel." fi |
创建一个表对话框
当你想让用户选择一个列表中选择多个选项的清单对话框是有用的,radiolist对话框,只允许选择一个。
语法:
whiptail –title “<checklist title>” –checklist “<text to show>” <height> <width> <list height> [ <tag> <item> <status> ] . . .
实例:
#!/bin/bash DISTROS=$(whiptail --title "Test Checklist Dialog" --checklist / "Choose preferred Linux distros" 15 60 4 / "debian" "Venerable Debian" ON / "ubuntu" "Popular Ubuntu" OFF / "centos" "Stable CentOS" ON / "mint" "Rising Star Mint" OFF 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "Your favorite distros are:" $DISTROS else echo "You chose Cancel." fi |
创建一个进度条
进度条是一个用户友好的对话框。whiptail从标准输入读取一个百分数(0~100),显示一个表内相应的计数。
语法:
whiptail –gauge “<test to show>” <height> <width> <inital percent>
实例:
#!/bin/bash { for ((i = 0 ; i <= 100 ; i+=20)); do sleep 1 echo $i done } | whiptail --gauge "Please wait while installing" 6 60 0 |
很容易在交互式shell脚本创建有用的对话框了吧。后续需要写一个交互式的shell脚本,试着用whiptail:)
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