Re^2: $SIG{ALRM} and windows vista?

[ikegami]

Not true.

$ perl 815492.pl
Enter your password: You timed out.

Signals for which there is a handler will interrupt I/O operations (at the OS level) even under safe signals. readline returns (with errno = EINTR) as soon as the signal is received, allowing the signal handler to be called within milliseconds even under safe signals.

[BrowserUk]

Not on my Vista system.

[ikegami]

It sounds like you're saying that signals don't interrupt I/O on Windows, but you know that only thing that Windows has that is similar to signals are Ctrl-C and Ctrl-Break. Are you saying they don't interrupt I/O? I haven't tested how they work.

Update: Clarified.

[BrowserUk]

Windows doesn't have signals

No, but it simulates some of them:

use strict;
use warnings;
use 5.010;

print 'Enter your password: ';

my $password = eval {
    local $SIG{ALRM} = sub {die "timeout\n"};
    alarm 5;
    #    return <STDIN>;
    sleep 10;
};

alarm 0;

if ($@ =~ /timeout/) {
    print "You timed out.\n";
}

__END__
[ 7:18:01.22] C:\test>alarmit.pl
Enter your password: You timed out.