问题
how do I create a simple Shell script that asks for a simple input from a user and then runs only the command associated with the predefined choice, for example
IF "ON"
Backup Server
ELSEIF "OFF"
Delete Backups
ELSEIF "GREY"
Send Backups
ENDIF
回答1:
You can take input from a user via read and you can use a case ... esac block to do different things.
Read takes as its argument, the name of the variable into which it will store it's value
read foo
Will take in a vaue from the user and store it in $foo.
To prompt the user for input you will need to use echo.
echo "What is your favourite color?"
read color
Finally, most shell scripts support the case operator. Which take the form
case "value" in
"CHOICE)
# Do stuff
;;
esac
Putting it all together:
echo "Which choice would you like? \c"
read choice
case "$choice" in
ON)
# Do Stuff
;;
OFF)
# Do different stuff
;;
*)
echo "$choice is not a valid choice"
;;
esac
回答2:
#!/bin/bash
select choice in "ON" "OFF" "*"; do
case "$choice" in
ON) echo "$choice"; # do something;
break;;
OFF) echo "$choice"; # do something;
break;;
*) echo "$choice other"; # do something;
break;;
esac
done
回答3:
Hi there is simple example how to do it
while true; do
read -p 'do you want to continue "y" or "n": ' yn
case $yn in
[Yy]* ) echo 'this program continue '; break;;
[Nn]* ) exit;;
* ) echo 'Please answer yes or no: ';;
esac
done
while true; do
read -p 'press "c" to quit this program: ' c
case $c in
[Cc]* ) exit;;
* ) echo 'for quit this program press "c": ' ;;
esac
done
for source click here source
来源：https://stackoverflow.com/questions/16390593/interactive-shell-script