我想暂停shell脚本中的输入，并提示用户进行选择。标准的是、否或取消类型问题。如何在典型的bash提示符中完成此操作？
当前回答
在这种情况下，我已经多次使用case语句，使用case语句是一种很好的方法。可以实现while循环，该循环模拟case块，利用布尔条件，以便更好地控制程序，并满足许多其他要求。在满足所有条件后，可以使用中断，将控制权传递回程序的主要部分。此外，为了满足其他条件，当然可以在控制结构中添加条件语句：case语句和可能的while循环。
使用案例陈述来满足您的请求的示例
#! /bin/sh
# For potential users of BSD, or other systems who do not
# have a bash binary located in /bin the script will be directed to
# a bourne-shell, e.g. /bin/sh
# NOTE: It would seem best for handling user entry errors or
# exceptions, to put the decision required by the input
# of the prompt in a case statement (case control structure),
echo Would you like us to perform the option: "(Y|N)"
read inPut
case $inPut in
# echoing a command encapsulated by
# backticks (``) executes the command
"Y") echo `Do something crazy`
;;
# depending on the scenario, execute the other option
# or leave as default
"N") echo `execute another option`
;;
esac
exit
其他回答
echo "Please enter some input: "
read input_variable
echo "You entered: $input_variable"
在这种情况下，我已经多次使用case语句，使用case语句是一种很好的方法。可以实现while循环，该循环模拟case块，利用布尔条件，以便更好地控制程序，并满足许多其他要求。在满足所有条件后，可以使用中断，将控制权传递回程序的主要部分。此外，为了满足其他条件，当然可以在控制结构中添加条件语句：case语句和可能的while循环。
使用案例陈述来满足您的请求的示例
#! /bin/sh
# For potential users of BSD, or other systems who do not
# have a bash binary located in /bin the script will be directed to
# a bourne-shell, e.g. /bin/sh
# NOTE: It would seem best for handling user entry errors or
# exceptions, to put the decision required by the input
# of the prompt in a case statement (case control structure),
echo Would you like us to perform the option: "(Y|N)"
read inPut
case $inPut in
# echoing a command encapsulated by
# backticks (``) executes the command
"Y") echo `Do something crazy`
;;
# depending on the scenario, execute the other option
# or leave as default
"N") echo `execute another option`
;;
esac
exit
这个问题有很多很好的答案，但从我看来，没有一个是我的理想，那就是：
简单一点，只需要几行外壳使用单个y/n键（无需按enter键）如果只按回车键，则默认为yes也可以使用大写的Y/N
这是我的版本，它具有这些财产：
read -n1 -p "Continue? (Y/n) " confirm
if ! echo $confirm | grep '^[Yy]\?$'; then
exit 1
fi
如果要在两个分支上运行代码，可以修改该条件，使其仅在“yes”上运行（只需删除if语句中的！）或添加else。
inquire () {
echo -n "$1 [y/n]? "
read answer
finish="-1"
while [ "$finish" = '-1' ]
do
finish="1"
if [ "$answer" = '' ];
then
answer=""
else
case $answer in
y | Y | yes | YES ) answer="y";;
n | N | no | NO ) answer="n";;
*) finish="-1";
echo -n 'Invalid response -- please reenter:';
read answer;;
esac
fi
done
}
... other stuff
inquire "Install now?"
...
使用read命令：
echo Would you like to install? "(Y or N)"
read x
# now check if $x is "y"
if [ "$x" = "y" ]; then
# do something here!
fi
然后你需要的所有其他东西
