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Full Discussion: Bash script to accept password and replace characters with * as they are typed
Top Forums Shell Programming and Scripting Bash script to accept password and replace characters with * as they are typed Post 302559624 by vgersh99 on Tuesday 27th of September 2011 05:25:26 PM
Old 09-27-2011
Code:
#!/bin/bash

passwd=""
omodes=$(stty -g)

printf "Enter Password: "
while :
do
   stty raw -echo
   c=$(dd bs=1 count=1 2>/dev/null)
   stty -raw

   # break out of loop if CR found
   [[ -z $(echo $c | tr -d "\015") ]] && break

   stty echo
   printf "*"
   passwd=${passwd}${c}
done

stty $omodes

printf "\nPassword entered: $passwd\n"

 

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LEARN ABOUT HPUX

stty

stty(2) 							System Calls Manual							   stty(2)

NAME

       stty(), gtty() - control terminal device (Bell Version 6 compatibility)

SYNOPSIS

   Remarks
       These system calls are preserved for backward compatibility with Bell Version 6.  They provide as close an approximation as possible to the
       old Version 6 functions.  All new code should use the and calls described in termio(7).

DESCRIPTION

       For certain status settings and status inquiries about terminal devices, the functions and are equivalent to

       and

       respectively (see ioctl(2) and termio(7).

RETURN VALUE

       and return the following values:

	      Successful completion.
	      Failure.
		     is set to indicate the error.

ERRORS

       If or fails, is set to one of the following values:

       [EBADF]	      is not a valid file descriptor.

       [EFAULT]       points to an invalid address.

WARNINGS

   Obsolescent Interfaces
       and are to be obsoleted at a future date.

SEE ALSO

       stty(1), exec(2), ioctl(2), sttyV6(7), termio(7), tty(7).

								  TO BE OBSOLETED							   stty(2)
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