How do I turn off echo in a terminal?

问题:

I'm writing a Bourne shell script and have a password input like this:

echo -n 'Password: '
read password

Obviously, I don't want the password being echoed to the terminal, so I want to turn off echo for the duration of the read. I know there's way to do this with stty, but I'll ask the question for the benefit of the community whilst I go read the manpage. ;)

回答1:

stty_orig=`stty -g`
stty -echo
echo 'hidden section'
stty $stty_orig

回答2:

read -s password works on my linux box.

回答3:

You can use '-s' option of read command to hide user input.

echo -n "Password:"
read -s password
if [ $password != "..." ]
then
        exit 1; # exit as password mismatched #
fi

Also you can use 'ssty -echo' if you want to hide from terminal to print. And restore the terminal settings using "ssty echo"

But I think for getting password input from user 'read -s password' is more than enough.

回答4:

Bourne Shell Script :

#!/bin/sh

# Prompt user for Password
echo -n 'Password: '

# Do not show what is being typed in console by user
stty -echo

# Get input from user and assign input to variable password
read password

# Show what is being typed in console
stty echo

stty manual command for more information:

@:/dir #man stty

stty manual snippets:

 STTY(1)              stty 5.2.1 (March 2004)              STTY(1)

     NAME
          stty - change and print terminal line settings

     SYNOPSIS
          stty [-F DEVICE] [--file=DEVICE] [SETTING]...
          stty [-F DEVICE] [--file=DEVICE] [-a|--all]
          stty [-F DEVICE] [--file=DEVICE] [-g|--save]

     DESCRIPTION
          Print or change terminal characteristics.

          -a, --all
               print all current settings in human-readable form

          -g, --save
               print all current settings in a stty-readable form

          -F, --file=DEVICE
               open and use the specified DEVICE instead of stdin

          --help
               display this help and exit

          --version
               output version information and exit

          Optional - before SETTING indicates negation.  An * marks
          non-POSIX settings.  The underlying system defines which
          settings are available.



   Local settings:

          [-]echo
               echo input characters