Argument

 

name

   Pointer to a string naming a shared memory object.
 

oflag

   Specifies options that define file status and file access modes.
   This argument is constructed from the bitwise inclusive OR of
   zero or more of the options defined in the <fcntl.h> header file.
 

mode

   The shared memory object's permission bits. This argument is used
   only when the shared memory object is being created.