There's a difference between can_read and select. can_read returns immediately when the object has no file handles, but I assumed it sleeps indefinitely like select in that situation.

That means there's a bug in my earlier version. The OP's code is equivalent to 

use Errno qw( EINTR );

while ($select->count()) {
    my @ready = $select->can_read()
        or do { next if $! == EINTR;
                last;  # Should be die("select: $!\n");
              };

    for my $fh (@ready) {
        ...
    }
}

[download]

In reply to Re^3: IO::Select and alarm() by ikegami
in thread IO::Select and alarm() by Maddingue

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