[SOLVED] very easy one

[ADFC]

hello.

i want to make a bash script that does the following:

if i press y it deletes /home/user/something
if i press n it exits the script
any other keystroke=IGNORE

thank you all

[bigtomrodney]

Have a look at the case command which is built in to Bash. You might find getopts useful as well.

Check the man pages or have a read here for case or here for getopts

[ADFC]

Yes, but could you please give me an working example??

So that I can understand the command syntax?

thank you

[Kieren]

Sounds a bit like homework...

[ADFC]

Sounds a bit like homework...

well i'm a linux begginer, so I'm sorry if I don't have your knowledge.

I've tried this

#!/bin/bash
# Capture keystrokes without needing to press ENTER.

old_tty_setting=$(stty -g) # Save old terminal settings.
stty -icanon -echo # Disable canonical mode and echo

keys=$(dd bs=1 count=1 2> /dev/null)

echo you pressed $keys
stty "$old_tty_setting" # Restore old terminal settings.


but it returns me an error

[Kieren]

I'm sorry if I was wrong. We don't mind helping out but we often get students coming on trying to trick us into doing homework assignments. The task you are trying to do sounded a bit like homework and when people ask for a 'working example' it usually means they want something written for them


When asking for help with code it is best practice to post the code, or part of code, that you are having problems with to show that you have at least tried it yourself. It will also let us know where you may have gone wrong

For your problem I would suggest using the read command with the –n option set to 1. As bigtomrodney suggested you can then use case to check what value the user entered and act accordingly.

You can find out more about read here
read MAN Page

And case here
case MAN Page

Both pages have examples for you

[ADFC]

thank you all
ADFC

[ADFC]

Hello!

OK, and what if I make it like this:
If I press s or n the program prints something, otherwise, it reads the keystroke again.

#!/bin/bash
read temp1


while [ "$temp1" != 's' && "$temp1" != 'n' ]
do
	clear          #clears the screen
	read temp1     #reads the keystroke again
done

echo "You pressed n or s keys!"

But it doesn't work.
It returns:
./test.sh: line 5: [: missing `]'


Ideas??

Thank you

[ADFC]

Ah ok!

I figured it out!

You have to use [[ ... ]] test construct.

The only problem is that when I use read I have to press the enter key.
And I just want to press the keystroke (without enter).

Is that possible??


Thanks

[Kieren]

For your problem I would suggest using the read command with the –n option set to 1

So in your script you would use:

read -n 1 temp1     #reads the keystroke again