bash 如何提示用户在shell脚本中输入？
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How to prompt user for input in shell script?
提问by danynl
I have a shell script in which I would like to prompt the user with a dialog box for inputs when the script is executed.
我有一个 shell 脚本，我想在脚本执行时用一个对话框提示用户输入。
example (after script has started) :
示例（脚本启动后）：
"Enter the files you would like to install : "
user input : spreadsheet json diffTool
where = spreadsheet, = json, = diffTool
then loop through each user input and do something like
然后遍历每个用户输入并执行类似的操作
for var in "$@"
do
echo "input is : $var"
done
How would I go about doing this within my shell script?
我将如何在我的 shell 脚本中执行此操作？
Thank you in advance
先感谢您
回答by Inian
You need to use the readbuilt-in available in bashand store the multiple user inputs into variables,
您需要使用read内置的可用bash并将多个用户输入存储到变量中，
read -p "Enter the files you would like to install: " arg1 arg2 arg3
Give your inputs separated by space. For example, when running the above,
输入以空格分隔的输入。例如，当运行上述时，
Enter the files you would like to install: spreadsheet json diffTool
now each of the above inputs are available in the variables arg1,arg2and arg3
现在上述每个输入都在变量中可用arg1，arg2并且arg3
The above part answers your question in way, you can enter the user input in one go space separated, but ifyou are interested in reading multiple in a loop, with multiple prompts, here is how you do it in bashshell. The logic below get user input until the Enterkey is pressed,
以上部分以某种方式回答了您的问题，您可以在一个空格中输入用户输入，但是如果您有兴趣在循环中阅读多个并带有多个提示，那么您可以在bashshell 中执行此操作。下面的逻辑获取用户输入，直到Enter按键被按下，
#!/bin/bash
input="junk"
inputArray=()
while [ "$input" != "" ]
do
read -p "Enter the files you would like to install: " input
inputArray+=("$input")
done
Now all your user inputs are stored in the array inputArraywhich you can loop over to read the values. To print them all in one shot, do
现在您的所有用户输入都存储在数组中inputArray，您可以循环读取这些值。要将它们全部打印出来，请执行
printf "%s\n" "${inputArray[@]}"
Or a more proper loop would be to
或者更合适的循环是
for arg in "${inputArray[@]}"; do
[ ! -z "$arg" ] && printf "%s\n" "$arg"
done
and access individual elements as "${inputArray[0]}", "${inputArray[1]}"and so on.
并访问单个元素作为"${inputArray[0]}"，"${inputArray[1]}"等等。
