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
我注意到，对于这样简单的用户输入，没有人发布显示多行回声菜单的答案，所以我的做法如下：
#!/bin/bash
function ask_user() {
echo -e "
#~~~~~~~~~~~~#
| 1.) Yes |
| 2.) No |
| 3.) Quit |
#~~~~~~~~~~~~#\n"
read -e -p "Select 1: " choice
if [ "$choice" == "1" ]; then
do_something
elif [ "$choice" == "2" ]; then
do_something_else
elif [ "$choice" == "3" ]; then
clear && exit 0
else
echo "Please select 1, 2, or 3." && sleep 3
clear && ask_user
fi
}
ask_user
发布这种方法是希望有人发现它有用且省时。
其他回答
您可以编写一个函数来测试：
confirm() {
local ans IFS=;
while read -rp "$1" -n1 ans;
do printf '\n';
case $ans in [Yy]) return 0;;
[Nn]) return 1;;
esac;
done;
}; ## Usage: if confirm "Are you sure? "; then ...
if confirm "Does everything look ok...reboot now? [Y/n]"; then
echo "rebooting..."
sleep 5
reboot
fi
检查此项
read -p "Continue? (y/n): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
inquire () {
echo -n "$1 [y/n]? "
read answer
finish="-1"
while [ "$finish" = '-1' ]
do
finish="1"
if [ "$answer" = '' ];
then
answer=""
else
case $answer in
y | Y | yes | YES ) answer="y";;
n | N | no | NO ) answer="n";;
*) finish="-1";
echo -n 'Invalid response -- please reenter:';
read answer;;
esac
fi
done
}
... other stuff
inquire "Install now?"
...
这是我在脚本/函数中通常需要的：
如果按ENTER键，默认答案为“是”也接受z（如果你在QWERTZ布局上搞混了）接受其他语言（“ja”、“Oui”、…）如果您在函数内部，请处理正确的出口
while true; do
read -p "Continue [Y/n]? " -n 1 -r -e yn
case "${yn:-Y}" in
[YyZzOoJj]* ) echo; break ;;
[Nn]* ) [[ "$0" = "$BASH_SOURCE" ]] && exit 1 || return 1 ;; # handle exits from shell or function but don't exit interactive shell
* ) echo "Please answer yes or no.";;
esac
done
echo "and off we go!"
yn() {
if [[ 'y' == `read -s -n 1 -p "[y/n]: " Y; echo $Y` ]];
then eval $1;
else eval $2;
fi }
yn 'echo yes' 'echo no'
yn 'echo absent no function works too!'
