open CMD, "/usr/local/bin/inotifywait |";

while (my $output = <CMD>) {
.......
}

##</code><code>##

my @output;
while (my $line = <CMD>) {
        chomp $line;
        push @output, $line;
}

##</code><code>##

for my $out (@output) {
        if (condition exists) {
                parse output;
        }
        .....
}