Ideally, is this possible to be prompted for this password by FAI when
installing the clients ?
You can do this by reading from /dev/console.
Here is a perl code segment that does more than just what you're asking
about. But you should be able to get the jist of it from this code. The
subroutine takes a string prompt, a hash containing the acceptable
answers to the prompt, and a default value. It displays the choices,
then prompts for an answer, and then checks the answer versus the
choices hash. If you just press enter, it takes the default value. And
it times out after 300 seconds. You put this code into a class script
so it is called before the install begins.
sub askQuestion
{
my $question = shift;
my $choices = shift;
my $default = shift;
my $answer = '';
if ( open CONSOLE, "</dev/console")
{
while (not defined ($choices->{$answer}))
{
eval
{
local $SIG{ALRM} = sub { die "alarm clock
restart" };
alarm 300;
printf STDERR "$question\n\n" . join ("\n ", map ($_ . "=" .
$choices->{$_}, keys %$choices)) . "\nYour choice (default=$default): ";
$answer = <CONSOLE>;
chomp($answer);
alarm 0;
}; # lave
$answer = $default unless ($answer);
warn "ANSWER=$answer";
} # elihw
close (CONSOLE);
} # fi
return $answer;
} # bus AskQuestion
