我编写了一个 bash shell 脚本(下面提供了代码),它为用户提供了 4 个选项。但是,我在代码方面遇到了一些麻烦。现在,当他们选择选项 3 以显示日期时。它一遍又一遍地循环。我必须关闭终端窗口才能停止它,因为它是一个无限循环。我将如何防止这种情况?退出似乎也不起作用。
如果有人能帮我一下,谢谢。
#!/bin/bashe
echo -n "Name please? "
read name
echo "Menu for $name
1. Display a long listing of the current directory
2. Display who is logged on the system
3. Display the current date and time
4. Quit "
read input
input1="1"
input2="2"
input3=$(date)
input4=$(exit)
while [ "$input" = "3" ]
do
echo "Current date and time: $input3"
done
while [ "$input" = "4" ]
do
echo "Goodbye $input4"
done
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一个紧凑的版本:
options=(
"Display a long listing of the current directory"
"Display who is logged on the system"
"Display the current date and time"
"Quit"
)
PS3="Enter a number (1-${#options[@]}): "
select option in "${options[@]}"; do
case "$REPLY" in
1) ls -l ;;
2) who ;;
3) date ;;
4) break ;;
esac
done
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