read password with no display

s_linux · 03-14-2011, 01:19 PM

Hello All,
I'm running the following script locally and it works as expected but when I ran over ssh (kick of this script from server1 to run on server2), I'm having issue.

Quote:

#!/bin/bash
echo -n "Please enter your ID : "
read ID
ADMUSER=$ID.domain.com
echo -n "Please enter the password for $ADMUSER: "
read PASSWD

so when I kick of the script from server1, it ask me to enter the ID and that works as expected but when it ask me for the password, I enter it, but it displays on the screen.
How can I make it without displaying the password on the screen.
I tried "read -sp" but did not work
Thanks again

corp769 · 03-14-2011, 02:04 PM

You can use the following:

Code:

stty -echo
read password
stty echo

Cheers,

Josh

s_linux · 03-14-2011, 02:11 PM

Thanks for your reply.
That did not work. Got following..
Please enter your LAN ID): testa
stty: standard input: Invalid argument
Please enter the password for testa.domaim.com: stty: standard input: Invalid argument
drains99

corp769 · 03-14-2011, 02:18 PM

Can you post the full code of your script? I want to run it on my machine so I can debug it for you.

s_linux · 03-14-2011, 02:47 PM

Thats all I have in the script right now and I'm testing with it. If it does that work I wanted to use it in several scripts.

corp769 · 03-14-2011, 02:56 PM

Code:

#!/bin/bash
read -p "Please enter your username: " ID
ADMUSER=$ID.domain.com
stty -echo
read -p "Please enter the password for $ADMUSER: " PASSWD
stty echo
echo "debug: $PASSWD"

This code works on my system. Test it out....

colucix · 03-14-2011, 03:10 PM

The code suggested by corp769 works for me, too! I wrote a similar one some time ago: it disables the echo as well and prints an asterisk at each keystroke. You can take a look here.

corp769 · 03-14-2011, 03:11 PM

Quote:

Originally Posted by colucix

The code suggested by corp769 works for me, too! I wrote a similar one some time ago: it disables the echo as well and prints an asterisk at each keystroke. You can take a look here.

Maybe he's missing something? I know stty is part of the coreutils package, maybe he don't have certain libs?

s_linux · 03-14-2011, 03:18 PM

It still does not work.

+ echo -n 'Please enter a valid remote IP (for replica sync): '
Please enter a valid remote IP: + read remoteip
10.67.132.110
+ for i in '$remoteip'
+ ssh 10.67.132.110 /tmp/edir886/testc.sh
-p Please enter your ID:
i301685
stty: standard input: Invalid argument
-p Please enter the password for testa.domain.com:
drains99
stty: standard input: Invalid argument
debug: drains99

Here is the script thats kicking from server1 to run on server2

Quote:

#!/bin/bash
set -x
echo -n "Please enter a valid remote IP: "
read remoteip
for i in $remoteip
do
ssh ${i} /tmp/edir886/testc.sh
done

Script on server2

Quote:

#!/bin/bash
echo -p "Please enter your ID: "
read ID
ADMUSER=$ID.domain.com
stty -echo
echo -p "Please enter the password for $ADMUSER: "
read PASSWD
stty echo
echo "debug: $PASSWD"

As I said earlier, if I run the script on server2 manually that works.

colucix · 03-14-2011, 03:30 PM

stty must be connected to a (pseudo)terminal to work properly. You can try to force the pseudo terminal allocation through ssh with the -t option.

Also note that echo has not a -p option. The suggested code had the -p option in the read statement to prompt the user with a question. In other words the following are equivalent:

Code:

echo "Would you like a cup of tea? "
read answer

and

Code:

read -p "Would you like a cup of tea? " answer

corp769 · 03-14-2011, 03:32 PM

To the OP - And that's why I said to post the code earlier before. I could have also told you what repo said

s_linux · 03-14-2011, 04:14 PM

looks like -t option with ssh did the trick. Thanks Colucix