hiding keyboard input

[james_rahul2002]

I want to hide the entered key from keyboard like when i enter password it shows me *, so how can i do this by programming.I am taking username and password from user and i want to hide password by printing * when entering password.
Help!!!!

[nalg0rath]

What programming language are you using?

[hiimsa]

use Xlib Programming

[nalg0rath]

use Xlib Programming

Well that does not solve any problem does it? First of all if you are going to use Xlib you need X Window System and also you need to be programming in C (or in a language that can use C-libs).

He could use Ncurses if he wanted or he could write the whole thing by himself but we can't just tell him what to use unless we know what programming language he is using or if he wants a graphical application.

[james_rahul2002]

I want to hide the entered key from keyboard like when i enter password it shows me *, so how can i do this by programming.I am taking username and password from user and i want to hide password by printing * when entering password.
Help!!!!

I AM USING SHELL SCRIPTING... I JUST WANT * ON PRESSING ANY KEY FROM KEYBOARD..JUST GIVE ME LINUX COMMAND I WILL INTEGRATE THAT COMMAND IN MY SCRIPT

[james_rahul2002]

I Am Using Shell Scripting... I Just Want * On Pressing Any Key From Keyboard..just Give Me Linux Command I Will Integrate That Command In My Script

[nalg0rath]

Okay, I wrote a little script to get you started:

#!/bin/sh
stty_orig=`stty -g`
stty -icanon -icrnl -echo min 0 time 0
key=""
password=""
while [ "$key" != <ENTER KEYCODE> ]
do
  key=""
  while [ "$key" = "" ]
  do
    read key
  done
  if [ "$key" != <ENTER KEYCODE> ]
  then
    echo -n "*"
    password=$password$key
  fi
done
stty $stty_orig

You will need to replace the <ENTER KEYCODE> with the correct "character" that represents a keypress of the [Enter] key. This is usually ^M, but I'm not sure if that always works.

This is just to get you started, it gets much more complicated when you need such functions as you should be able to erase characters.

[Cabhan]

nal's script is correct, but do you need it to print *s? Most Linux apps just print nothing at all, and if you're okay with that, the script becomes FAR FAR simpler. The easiest way would be to do:

#!/bin/bash

stty_orig=$(stty -g)
echo -n "Enter Your Password: "
stty -echo
read password
stty $stty_orig

echo "Your password is: $password"

The only complex thing here is the use of 'stty', which allows you to control the terminal. Here, we turn off the printing of characters entirely, enter the password, and then re-enable it. This way, you do not need to manually print characters or read them one-by-one or anything like that. It just works.