fcntl

   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 available:

Arguments       Description     Return_Values