Question

我正在编写一个bash脚本，该脚本需要多个用户输入。在脚本执行任何操作之前，我想确保所有值都已由用户添加。

  #/bin/bash

read -p "Please enter the domain Name: " domain
read -p "Please Enter path where you want to save your result: " path
if [[ -z "$domain" && "$path"]]; then
    echo "You have not entered the Domain Name"
    exit 1

else
    echo "Do Something Here"
fi

我检查了1个用户输入，但工作正常，但是尝试2个用户输入时，出现错误。

./test.sh: line 5: unexpected token `;', conditional binary operator expected
./test.sh: line 5: syntax error near `;'
./test.sh: line 5: `if [[ -z "$domain" && "$path"]]; then'

谢谢！

Answer 1

由于语法错误，因为您忘记在"$path"和]之间放置空格（bash使用空格作为定界符）。

如果要在至少一种情况不正确时失败，则应使用||（OR）运算符。

#/bin/bash

read -p "Please enter the domain name: " domain
read -p "Please enter the path where you want to save your result: " path
if [[ -z "$domain" ]] || [[ -z "$path" ]] ; then
    echo "You didn't enter the domain name or the save path"
    exit 1
else
    echo "Do something here"
fi

Answer 2

由于您使用的是[[ double brackets，因此可以使用||来测试您的两个条件是否为真。在这种情况下，您的代码将如下所示：

#!/usr/bin/env bash
read -p "Please enter the domain Name: " domain
read -p "Please Enter path where you want to save your result: " path
if [[ -z "$domain" || -z "$path" ]]; then
    echo "Either you have not entered the Domain Name, or you have not entered the path."
    exit 1
else
    echo "Do Something Here"
fi

请注意，括号内必须有空格。正如其他人所指出的那样，错误应该是特定的，因此您应该考虑以下内容：

if [[ -z "$domain" ]]; then
    echo "You have not entered the Domain Name"
    exit 1
elif [[ -z "$path" ]]; then
    echo "You have not entered the path"
    exit 1
fi
echo "Do something here"

有点冗长，但可以为用户提供更具体的反馈。

如何在bash中读取两个输入值？

2 个答案: