linux - 如何提示用户输入 sudo 密码？

Question

我的问题是，在运行此 bash 脚本时，一旦做出选择，我该如何实现要求输入 sudo 密码的操作。例如，如果用户选择在/目录中搜索，脚本将返回权限被拒绝的情况。我想弄清楚如何让脚本提示输入密码然后继续运行。

#!/bin/bash
function press_enter
{
echo ""
echo -n "Press Enter to continue"
read
clear
}
selection=
where_selection=
what_selection=
until [ "$selection" = "3" ]; do
echo -e "Where would you like to search 
1- Root
2- Home
3- Exit

Enter your choice ---> \c"
read selection
case $selection in
1) cd / ; press_enter ;;
2) cd /home ; press_enter ;;
3) echo "Have a great day!" ; exit ;;
esac
echo "What is the name of the file you would like to search for?"
read -r a
if find . -name "$a" -print -quit | grep -q .
then
echo "You found the file"
else
echo "You haven't found the file"
fi
done

Answer 1

你可以做这样的事情，虽然它有点 hacky:

#!/bin/bash
function press_enter
{
    echo ""
    echo -n "Press Enter to continue"
    read
    clear
}
selection=
where_selection=
what_selection=
sudo=""
until [ "$selection" = "3" ]; do
    echo -e "Where would you like to search 
    1- Root
    2- Home
    3- Exit

    Enter your choice ---> \c"
    read selection
    case $selection in
        1) cd / ; sudo="sudo"; press_enter ;;
        2) cd /home ; sudo=""; press_enter ;;
        3) echo "Have a great day!" ; exit ;;
    esac
    echo "What is the name of the file you would like to search for?"
    read -r a
    if $sudo find . -name "$a" -print -quit | grep -q .
    then
        echo "You found the file"
    else
        echo "You haven't found the file"
    fi
done

基本上 $sudo 是一个空字符串，除非用户选择 1，然后它将运行“sudo”。更好的方法是使用第二个 if block ，在需要时使用 sudo 运行命令。