Hi guys!

I use the following code for executing a script with timeout on it:

eval {
     alarm($timeout);

     pipe(READ,WRITE);
     if ($pid = fork)  {
        $SIG{CHLD} = sub { $exitStatus = $? while (waitpid(-1, WNOHANG
+)) > 0 };
        close(WRITE);
     }
     else  {
        die "Cannot fork: $!" unless defined $pid;
        open(STDOUT, ">&=WRITE") or die "Cannot redirect STDOUT: $!";
        close(READ);
        exec ("$extScript") or die "Cannot exec $extScript: $!";
     }
     while(<READ>)  {
     push(@output, $_);  }

     close(READ);
     alarm(0);

};  ## End eval

if ($@)  {
   if ($@ =~ /Timeout/)  {
     print "Reached timeout\n";
   } else {
     alarm(0);
     die;
   }
} else {
  print Dumper(\@output);
}
[download]

the above code is wrraped into a function and called with two parameters: script and timeout.
my problem is that i get the following message when calling the function:

Argument "WNOHANG" isn't numeric in waitpid at /../../prog.pl

and the program gets stuck.
can anyone help?