|
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 |
