在 bash 脚本中建议用户输入的答案

发布于 2024-10-08 10:30:42 字数 290 浏览 5 评论 0原文

这是一个例子：

#!/bin/bash
echo -e "Enter IP address: \c"
read
echo $REPLY

但我想让用户更容易回答。我想为用户提供一个答案。它应该看起来像这样：

输入您的IP：192.168.0.4

用户可以直接按回车键同意192.168.0.4，也可以删除一些字符（例如用一个退格键删除“4”并输入3）。

如何进行这样的输入？在bash中可以吗？

原文

Here is an example:

#!/bin/bash
echo -e "Enter IP address: \c"
read
echo $REPLY

But I want to make it easier for the user to answer. I'd like to offer an answer to the user. It should look something like this:

Enter your IP: 192.168.0.4

And the user can just press Enter and agree with 192.168.0.4, or can delete some characters (for example delete "4" with one backspace and type 3 instead).

How to make such an input? It is possible in bash?

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酷到爆炸 2024-10-15 10:30:42

bash 的读取具有 readline 支持（编辑：Jonathan Leffler 建议将提示也放入读取中）

#!/bin/bash
read -p "Enter IP address: " -e -i 192.168.0.4 IP
echo $IP

bash's read has readline support (Edit: Jonathan Leffler suggests to put the prompt into read as well)

#!/bin/bash
read -p "Enter IP address: " -e -i 192.168.0.4 IP
echo $IP

回复收藏 0 原文

您的好友蓝忘机已上羡 2024-10-15 10:30:42

我执行此操作的方法是在括号中的提示中建议默认值，然后使用默认值参数扩展将IP设置为192.168.0.4（如果他们只是按回车键），否则它将具有他们输入的值。

#!/bin/bash
default=192.168.0.4
read -p "Enter IP address [$default]: " IP
IP=${IP:-$default}
echo "IP is $IP"

输出

$ ./defip.sh
Enter IP address [192.168.0.4]:
IP is 192.168.0.4

$ ./defip.sh
Enter IP address [192.168.0.4]: 192.168.1.1
IP is 192.168.1.1

The way I would do this is to suggest the default in the prompt in brackets and then use the default value parameter expansion to set IP to 192.168.0.4 if they just pressed enter, otherwise it will have the value they entered.

#!/bin/bash
default=192.168.0.4
read -p "Enter IP address [$default]: " IP
IP=${IP:-$default}
echo "IP is $IP"

Output

$ ./defip.sh
Enter IP address [192.168.0.4]:
IP is 192.168.0.4

$ ./defip.sh
Enter IP address [192.168.0.4]: 192.168.1.1
IP is 192.168.1.1

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微凉徒眸意 2024-10-15 10:30:42

完成您想要的大部分操作的经典方法是：

default="192.168.0.4"
echo -e "Enter IP address ($default): \c"
read reply
[ -z "$reply" ] && reply=$default
echo "Using: $reply"

这不提供编辑选项。

The classic way to do most of what you want is:

default="192.168.0.4"
echo -e "Enter IP address ($default): \c"
read reply
[ -z "$reply" ] && reply=$default
echo "Using: $reply"

This doesn't give the editing option.

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太阳男子 2024-10-15 10:30:42

编辑并不实用，但通常会执行以下操作：

echo -e "Enter IP address [$default]: \c"
read answer
if [ "$answer" = "" ]; then
     answer="$default"
fi

Editing isn't practical but it's common to do something like:

echo -e "Enter IP address [$default]: \c"
read answer
if [ "$answer" = "" ]; then
     answer="$default"
fi

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醉城メ夜风 2024-10-15 10:30:42

如果有循环，您可以建议最后一个值：

while [[ $continue != "y" ]]
do
   echo ""
   read -p " - Enter the name : " -e -i "$name" name
   echo ""
   echo " - Chosen name is: $name "
   read -p " - continue (yes) ou retry (no) (y/n):  " continue
done
   echo " - We continue...  "
   echo " - Chosen name is: $name "

You can suggest last value if you have a loop:

while [[ $continue != "y" ]]
do
   echo ""
   read -p " - Enter the name : " -e -i "$name" name
   echo ""
   echo " - Chosen name is: $name "
   read -p " - continue (yes) ou retry (no) (y/n):  " continue
done
   echo " - We continue...  "
   echo " - Chosen name is: $name "

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