I'm trying to read user input char by char, silently, as follows:
while [ 1 ]; do read -s -N 1 ... done
While this loop works perfectly using VNC (
xterm), it works only partially using putty (xterm) or a Linux terminal, and most of other text terminals.
The problem is encountered when I become "wild" with the keyboard and striking multiple keys at the same time, and than some of the keys are echoed despite of the -s mode.
I've also tried to redirect output and
stty -echo. while the first did not make any difference, the latter would be somehow helpful, minimizing the "echo"s to be less frequent, but not perfect.