Select Code to Download

         struct flock {
             ...
...
                                 (F_GETLK only) */
             ...
         };

fcntl(FILEHANDLE, F_SETLKW, pack("sslli", F_WRLCK, SEEK_SET, 0, 0, 0))
+;

fcntl(FILEHANDLE, F_SETLKW, pack("s!s!l!l!i!", F_WRLCK, SEEK_SET, 0, 0
+, 0));