 | Chapter 45 Shell Programming for the Initiated |  |
| Chapter 45 Shell Programming for the Initiated | |
When you type your password, UNIX turns off echoing so what you type
won't show on the screen.
You can do the same thing in shell scripts with stty -echo.
stty read | #!/bin/sh ... trap 'stty echo; exit' 0 1 2 3 15 # use the right echo for your UNIX: echo "Enter code name: \c" #echo -n "Enter code name: " stty -echo read ans stty echo ... |
|---|
The response is stored in $ans.
The
trap (44.12)
helps to make sure that, if the user presses
CTRL-c
to abort the script, characters will be echoed again.
-
|  | |
| 45.26 Quoted hereis Document Terminators: sh vs. csh |  | 45.28 Quick Reference: expr |
