Reading password and echo * character Post: 302158135

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Top Forums Shell Programming and Scripting Reading password and echo * character Post 302158135 by Perderabo on Monday 14th of January 2008 11:35:00 AM

01-14-2008

Administrator Emeritus

It's a lot of trouble....

Code:

#! /usr/bin/ksh

exec 4>/dev/tty

function getpass
{
        typeset prompt=$1
        typeset backspace=$(echo  \\b\\c)
        typeset enter=$(echo \\r\\c)
        typeset savesetting=$(stty -g)
        typeset keystroke password n i reading result
        n=0
        echo "${prompt}"\\c >&4
        stty -echo -icrnl -icanon min 1 time 0
        reading=1
        while ((reading)) ; do
                keystroke=$(dd bs=1 count=1 2>/dev/null)
                case $keystroke in
                $enter)
                        reading=0
                        ;;
                $backspace)
                        if ((n)) ; then
                                echo "${backspace} ${backspace}"\\c >&4
                                ((n=n-1))
                        fi
                        ;;
                *)
                        echo \*\\c >&4
                        data[n]=$keystroke
                        ((n=n+1))
                esac
        done
        stty "$savesetting"
        echo >&4
        result=""
        i=0
        while  ((i<n)) ; do
                result="${result}${data[i]}"
                ((i=i+1))
        done
        echo $result
        return 0
}

final=$(getpass "password -  ")
echo the password is $final
exit 0

The allows the backspace key to correct a typo. Remove the backspace stuff from the script if you want to allow a backspace in a password.

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LEARN ABOUT HPUX

kpasswd

kpasswd(1)							   User Commands							kpasswd(1)

NAME

       kpasswd - change a user's Kerberos password

SYNOPSIS

       /usr/bin/kpasswd [principal]

DESCRIPTION

       The  kpasswd command is used to change a Kerberos principal's password. kpasswd prompts for the current Kerberos password, which is used to
       obtain a changepw ticket from the KDC for the user's Kerberos realm. If kpasswd successfully obtains  the  changepw  ticket,  the  user	is
       prompted twice for the new password, and the password is changed.

       If the principal is governed by a policy that specifies the length and/or number of character classes required in the new password, the new
       password must conform to the policy. (The five character classes are lower case, upper case, numbers, punctuation, and  all  other  charac-
       ters.)

OPERANDS

       The following operand is supported:

       principal

	   Change  the	password  for the Kerberos principal principal. Otherwise, the principal is derived from the identity of the user invoking
	   the kpasswd command.

FILES

       /tmp/ovsec_adm.xxxxxx

	   Temporary credentials cache for the lifetime of the password changing operation. (xxxxxx is a random string.)

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWkrbu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       SEAM(5)

BUGS

       If kpasswd is suspended, the changepw tickets may not be destroyed.

SunOS 5.10							    30 Jul 2001 							kpasswd(1)