Question

我正在制作一个postinstall脚本，但由于某些原因，我的菜单在命令时无效。

它应该回应我选择的任何编辑器（好吧，现在），但只有echos emacs。帮助

（以下代码）

#!/bin/bash
if [ $(whoami) != root ]
then
    echo "Sorry, this script must be run as root. Try sudo su, and then running it!"
    exit 1
fi

which dialog > /dev/null

if [ $? = 1 ]
then
    echo "Sorry, you need to install dialog first."
    exit 1
fi

choice=$(dialog --no-cancel --backtitle "Jacks Post Install Script" --title "Welcome" --menu "" 20 40 35 1 "Install crap already!" 2 "Enable ssh" 3 "Reboot" 4 "Exit" 3>&1 1>&2 2>&3 3>&-)

function insstp1 {
    dialog --cancel-label "No thanks" --extra-button --extra-label "Vim" --ok-label "Emacs" --backtitle "Jacks Post Install Script" --title "Pick an editor!" --yesno "I bet you will pick emacs. Seriusly." 5 40
    echo $? #emacs 0 vim 3 no 1
    if [ $? == 0 ]
    then
    echo "Emacs"
    fi

    if [ $? == 3 ]
    then
        echo "Vim"
    fi

    if [ $? == 1 ]
    then
    echo "nope"
    fi
}

case $choice in
    1) insstp1 ;;
    2) enablssh ;;
    3) reboot ;;
    4) clear; exit 0 ;;
esac

Answer 1

错误的语法==应为-eq，当然，以避免回声。

dialog --cancel-label "No thanks" --extra-button --extra-label "Vim" --ok-label "Emacs" --backtitle "Jacks Post Install Script" --title "Pick an editor!" --yesno "I bet you will pick emacs. Seriusly." 5 40
choice2=$?

if [ $choice2 -eq 0 ]; then
   echo "Emacs"
fi

来自docs：

arg1 OP arg2

OP是'-eq'，' - ne'，' - lt'，' - le'，' - gt'或'-ge'之一。   如果arg1等于，则这些算术二元运算符返回true   等于，小于，小于或等于，大于或等于   分别等于或等于arg2。 Arg1和arg2可能是正的或   负整数。

Answer 2

存储$?并使用案例构造。您试图将第一个对话框的结果存储在变量选项中，但它将包含stdout。这个选择也应该用$?来完成：

    function insstp1 {
        dialog --cancel-label "No thanks" --extra-button --extra-label "Vim" --ok-label "Emacs" --backtitle "Jacks Post Install Script" --title "Pick an editor!" --yesno "I bet you will pick emacs. Seriusly." 5 40
        editchoice=$? #emacs 0 vim 3 no 1
        case ${editchoice} in
           0) echo "Emacs" ;;
           3) echo "Vim" ;;
           1) echo "nope";;
           *) echo "Let me pick for you ...";;
        fi
    }

dialog --no-cancel --backtitle "Jacks Post Install Script" --title "Welcome" --menu "" 20 40 35 1 "Install crap already!" 2 "Enable ssh" 3 "Reboot" 4 "Exit" 3>&1 1>&2 2>&3 3>&-
choice=$?

case ${choice} in
    1) insstp1 ;;
    2) enablssh ;;
    3) reboot ;;
    4) clear; exit 0 ;;
esac

Bash if $？忽视

2 个答案: