Performs controlling operations on an open file.

    Format

      #include  <sys/types.h>

      #include  <unistd.h>

      #include  <fcntl.h>

      int fcntl  (int file_desc, int request [, int arg]);

      int fcntl  (int file_desc, int request [, struct flock *arg]);

  Additional Information (explode) :

• Arguments
• Description
• Return Values