use Errno;
OPEN: eval {
    open FH, '<', 'directory/myfile'
        or die $!;
};
if ($@) {
    {
        $@ == EACCES and die $@;
        $@ == ENFILE and sleep(1), goto OPEN;
        warn $@;
    }
}
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There are interesting definitions of try and catch to be seen around the monastery, but they all boil down to the construction I show.